Muhammad is available for hire
Hire MuhammadMuhammad Khan
Verified Expert in Engineering
iOS Engineer and Developer
Vancouver, BC, Canada
Toptal member since March 12, 2026
Bio
Muhammad is a senior software engineer with 12+ years architecting mobile platforms and enterprise SDKs. He specializes in native iOS, Android, React Native, and Flutter, bridging complex frontends with robust back-end integrations using Node.js, Python, and SAP (BTP, OData, CAPM). An expert in secure architecture, video streaming, and AI workflows, he takes absolute technical ownership to modernize legacy systems and deliver highly scalable, real-time applications.
Portfolio
Jack Rudloff
Computer Vision, App Development, iOS, ARKit, OpenCV, Apple Vision Framework...
IDEASLAB.COM INC.
iOS SDK, iOS, Python, Swift, OAuth 2, IP Protection, UI Animation, Claude Code...
Radical Good Neural AI PLCC
Swift, SwiftUI, Firebase, Google Cloud, Python, Python Script, Node.js...
Experience
- iOS - 12 years
- Mobile App Security - 6 years
- SDK Development - 6 years
- SwiftUI - 6 years
- Core ML - 4 years
- VisionOS - 4 years
- Generative Artificial Intelligence (GenAI) - 2 years
- Artificial Intelligence (AI) - 2 years
Work Experience
iOS Computer Vision Expert
2026 - PRESENT
Jack Rudloff
- Built the on-device vision pipeline for an iOS kicking app: a CoreML YOLO detector running in VisionCamera frame processors tracks ball and goalposts every frame, and calls make/miss live, with no server.
- Replaced one-shot tap calibration with continuous goalpost tracking, so the phone can move between kicks. Lifted end-to-end accuracy from 78.1% to 90.6%, balanced on a harness that drives the shipped judge.
- Built the evaluation harnesses the project lacked after discovering train and test leakage had overstated accuracy for weeks: end-to-end, component, phantom-rate, and unseen-field, each answering one question.
- Led a pre-release audit that found and fixed 14 confirmed defects, two of them blockers: every per-kick video was silently discarded, and the yardage picker saved a different distance than it displayed.
- Diagnosed the central generalization failure by measurement, not guesswork: goalposts found in 26-80% of frames at trained locations against 12% at a new one, refuting a wrong hypothesis it had acted on.
- Hand-labeled 868 frames and retrained. Unseen-field detection went from 12% to 60%, and false ball detections went from 20.1% to 0%, but a regression of the headline number failed the gate, so it was rejected, not shipped.
- Designed a confidence gate that makes the app ask the kicker rather than record a verdict it cannot support, choosing the signal by experiment after the intuitive one measurably made accuracy worse.
- Built distance estimation from goalpost width and camera field of view, validated against hand-measured ground truth, separating random detector jitter from the systematic error that bounds its accuracy.
- Shipped to TestFlight through EAS with crash reporting, a production Postgres migration, and a 302-test mutation-verified suite. Fixed tooling that had been quietly destroying its own baseline measurements.
- Turned measurement into client decisions, replacing an unsupported "75-90% accurate" claim with four defined targets and the evidence needed to prove them: 110 human-checked kicks for 95%, about 370 for 99%.
Technologies: Computer Vision, App Development, iOS, ARKit, OpenCV, Apple Vision Framework, React Native, Expo, JavaScript, Swift, native Expo modules, react-native-vision-camera (frame processors), react-native-worklets-core, AsyncStorage, Core ML, YOLO object detection, Ultralytics, PyTorch, coremltools, Python, NumPy, PiLLoW, FFmpeg, dataset curation and hand-labelling, model evaluation and gating, Supabase, Supabase Auth, PostgreSQL, Storage, Row-level Security (RLS), SQL schema migrations, Node.js REST services, Gemini and Claude APIs, EAS Build, TestFlight, App Store Connect, Sentry, SQL Sentry, Git, GitHub, GitHub Actions, node:test, Mutation Testing, technical writing for non-technical stakeholders, Algorithms, Geofencing, Technical Leadership, Database Architecture, OpenAI, Next.js, Django, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), AI Development, Cloud Storage, Transcoding, Docker, EMR, Stress Testing, Go, API Development, OpenTelemetry, Location Services, Location Tracking, AI Engineering, Agentic AI, Agentic Coding, Cursor AI, MySQL, AI Agent Orchestration, AI Agents, Agentic Frameworks, Model Context Protocol (MCP), Plugins, Role-based Access Control (RBAC), Vertex AI, Code Auditing, Startups, Vercel, Solution Architecture, SaaS, Project Management, Authorization, Cloud Infrastructure, Automated Testing, Networking, Mobile Architecture, Network Architecture, Cloud, AI Safety, AI Security, Agentic AI Systems, Cloud Security, Machine Learning Operations (MLOps), AI Tools, Artificial Intelligence (AI), Agentic RAG Systems, RAG Architecture, Cloud Platforms, Personalization, React Native Bridge, AI-generated Code, Analytics, Mobile UX, UI Design
Senior iOS SDK Engineer | Core ML, Computer Vision, Security
2026 - 2026
IDEASLAB.COM INC.
- Engineered a seamless, concurrent video processing pipeline capable of both real-time camera inference and high-volume offline video analysis using AVFoundation, CoreVideo, and Vision.
- Integrated multiple custom CoreML models (17-point and 29-point YOLO pose estimation, image segmentation, and LSTM trajectory smoothing) into a unified, high-performance execution strategy.
- Resolved critical Jetsam out-of-memory (OOM) crashes during heavy offline processing by implementing strict autoreleasepool memory boundaries and precise asynchronous task yielding.
- Architected a robust system to translate between conflicting mathematical spaces (top-left YOLO padded tensors vs. bottom-left Vision normalized bounds), ensuring UI overlays, bounding boxes, and complex polygon contours mapped flawlessly.
- Built a highly optimized, state-aware MotionPathTracker using binary search trees to ensure O(log n) performance when scrubbing through multi-thousand-frame swing trajectories.
- Developed a native secure model loader leveraging CryptoKit (AES-GCM) and AppleArchive to decrypt and decompress LZFSE .mlmodelc bundles at runtime, protecting proprietary ML assets.
- Designed advanced runtime security protocols, including active decoy file generation to thwart automated filesystem scrapers.
- Implemented stringent environment validation, deploying dynamic injection detection and anti-debugging mechanisms to protect the SDK’s intellectual property on consumer devices.
- Developed and routed highly secure API endpoints through OIC to communicate with active back-end workers for real-time license validation and state management, bypassing traditional monolithic architectures.
Technologies: iOS SDK, iOS, Python, Swift, OAuth 2, IP Protection, UI Animation, Claude Code, Back-end, Full-stack, User Experience (UX), Architecture, iOS Native Libraries, Kotlin, Google Play Store, DevOps, Maps, Integration, Payments, Auth0, Payment Gateways, Full-stack Development, Microservices, ABAP, App Design, HTML5, Apps, StoreKit, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Agentic Engineering, 2D Games, Game Development, Mobile Games, Mobile Game Development, Unity, iPad, Algorithms, Geofencing, Payment Processing, Technical Leadership, Database Architecture, OpenAI, Next.js, Anti-fraud, Penetration Testing, Cryptography, Django, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), AI Development, Cloud Storage, Docker, EMR, Stress Testing, Go, API Development, OpenTelemetry, Android SDK, AI Engineering, Agentic AI, Agentic Coding, Cursor AI, AI Agent Orchestration, AI Agents, Agentic Frameworks, Model Context Protocol (MCP), Plugins, Role-based Access Control (RBAC), Vertex AI, Code Auditing, Startups, Solution Architecture, SaaS, Project Management, Application Security, Authorization, Automated Testing, Networking, Mobile Architecture, Machine Learning Operations (MLOps), AI Tools, Artificial Intelligence (AI), Agentic RAG Systems, RAG Architecture, Cloud Platforms, AI-generated Code, Analytics, Mobile UX, UI Design
Full-stack Engineer
2025 - 2026
Radical Good Neural AI PLCC
- Shipped a release-gating build pass (12+ coordinated changes) that unblocked a clinical reliability study, delivering a signed TestFlight build across SwiftUI, Firebase, and a Python data pipeline.
- Brought the app's user-facing result language into FDA labeling compliance, audited every interpretation string across the app UI, PDF reports, and back end, and replaced diagnostic/causal wording with objective, range-relative statements.
- Standardized the clinical-metric taxonomy end-to-end (Swift data models, Firestore schema, PDF reports, CSV exports) so every measurement is consistently and auditably labeled across the stack.
- Designed and ran a backed-up, idempotent Firestore migration using the Firebase Admin SDK (Node.js), value-mapped legacy fields to a canonical schema with copy-before-delete safeguards and full pre/post verification, zero data loss.
- Built and deployed Cloud Functions (TypeScript) for automated report generation and one-time schema migration; hardened a destructive cleanup job with role-based access control and conditional deletes.
- Fixed a research data export pipeline (Python/Firestore) that was silently dropping nested per-screen metrics, adding a generic array-of-maps flattener to ensure complete exports.
- Kept a 1,100+ case test suite green (Swift Testing/XCTest) through every change and validated release builds on device and simulator before shipping.
- Partnered directly with the research lead to scope, confirm against source code, and document each change—translating regulatory and study requirements into verified implementations.
- Contributed to AI workflow implementation. Orchestrated and deployed generative AI capabilities utilizing AWS Bedrock AgentCore for 8 months, enabling intelligent data processing and automated threat-pattern analysis within a mobile ecosystem.
- Handled security and prompt architecture. Designed secure execution environments for Bedrock AI agents, ensuring that data passed between the mobile client and the AI models strictly adhered to enterprise security and sandboxing constraints.
Technologies: Swift, SwiftUI, Firebase, Google Cloud, Python, Python Script, Node.js, JavaScript, TypeScript, React, iPadOS, ARKit, Machine Learning, Computer Vision, Eye Tracking, Apple HealthKit, SQL, Amazon Web Services (AWS), Native Mobile Apps, UI Animation, Lottie-iOS, Rive, Claude Code, Back-end, Full-stack, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, WidgetKit, Kotlin, Google Play Store, DevOps, Google Cloud Platform (GCP), Back-end Development, Maps, Integration, Payments, Auth0, Webhooks, Payment Gateways, Full-stack Development, Microservices, CSS, HTML, Social Media, Capacitor, ABAP, React Testing Library, GraphQL, App Design, HTML5, Apps, StoreKit, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Agentic Engineering, 2D Games, Game Development, Mobile Games, Mobile Game Development, Unity, iPad, Algorithms, Geofencing, Payment Processing, Technical Leadership, Database Architecture, OpenAI, Next.js, HIPAA Compliance, AWS Lambda, Amazon Aurora, Amazon Cognito, Modernization, Django, Datadog, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), Expo, AI Development, Replit, Cloud Storage, Transcoding, Docker, EMR, Healthcare Software, Stress Testing, Go, API Development, OpenTelemetry, Bluetooth, Location Services, Location Tracking, Hardware, AI Engineering, Agentic AI, Agentic Coding, Cursor AI, MySQL, Web Development, Reviews, REST APIs, AI Agent Orchestration, AI Agents, Agentic Frameworks, Model Context Protocol (MCP), Plugins, Role-based Access Control (RBAC), Vertex AI, Code Auditing, Startups, Vercel, Solution Architecture, SaaS, Redis, ERP django, Project Management, Application Security, Authorization, Cloud Infrastructure, Automated Testing, Data Modeling, Vue, Front-end, Networking, Mobile Architecture, Network Architecture, Cloud, Cloudflare, AI Safety, AI Security, Agentic AI Systems, Cloud Security, AI Tools, Continuous Delivery (CD), Continuous Integration (CI), Artificial Intelligence (AI), Agentic RAG Systems, RAG Architecture, Cloud Platforms, AVPlayer, Vue 3, AI-generated Code, Analytics, Mobile UX, UI Design
Senior SAP Integration Consultant/Engineer
2024 - 2026
Multinational Pharmaceutical Company
- Migrated legacy ABAP systems to SAP BTP using CAPM and Node.js, ensuring enterprise scalability.
- Architected custom dashboards with SAPUI5 and Fiori Elements, consuming secure OData services.
- Built automated data workflows bridging SAP S4HANA and external APIs using RFC and OData.
- Enforced strict domain-driven design and OAuth access controls for secure API endpoints.
- Optimized periodic polling mechanisms and automated enterprise data retrieval pipelines.
- Led back-end modernization leveraging Core Data Services and microservices on SAP BTP.
- Integrated hybrid environments synchronizing legacy ECC instances with cloud native microservices.
- Implemented rigorous continuous integration pipelines across all SAP BTP applications.
- Designed highly decoupled event-driven architectures to replace monolithic legacy infrastructure.
- Executed secure SAP middleware integrations utilizing BAPI to validate strict product datasets.
Technologies: SAP, SAP ABAP, STB, CAMP, SAP Fiori, SAP Migration, SAP Mobile, SAP SDK, SAP UI5, SAPUI5, OData, SAP Open Data Protocol (OData), OAuth, SAP S/4HANA, SAP Remote Function Call (RFC), Microservices, SAP ECC, BAPI, Agile, ABAP, ABAP Debugging, ABAP Enhancements, ABAP Core Data Services, ABAP Managed Database Procedures (AMDP), ABAP RESTful Application Programming Model (RAP), Node.js, React Testing Library, GraphQL, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Agentic Engineering, Algorithms, Geofencing, Technical Leadership, Database Architecture, OpenAI, Next.js, AWS Lambda, Amazon Aurora, Amazon Cognito, .NET, Relational Databases, Event-driven Architecture, Cloud Storage, Django, Docker, EMR, Stress Testing, Go, API Development, OpenTelemetry, GitLab, Bluetooth, Location Services, Location Tracking, AI Engineering, Agentic AI, Agentic Coding, Cursor AI, MySQL, SAP Fieldglass, Web Development, REST APIs, AI Agent Orchestration, AI Agents, Agentic Frameworks, Model Context Protocol (MCP), Plugins, Role-based Access Control (RBAC), Vertex AI, Code Auditing, Lightspeed, Solution Architecture, Multi-tenant Architecture, Multi-tenant SaaS, SaaS, Redis, Enterprise Resource Planning (ERP), ERP django, Project Management, Authorization, Cloud Infrastructure, Automated Testing, Data Modeling, Vue, Front-end, Networking, Network Architecture, SAP NetWeaver, Cloud, SAP Basis, SAP ERP, AI Tools, Continuous Delivery (CD), Continuous Integration (CI), Artificial Intelligence (AI), Agentic RAG Systems, RAG Architecture, Cloud Platforms, Vue 3, AI-generated Code, Analytics
Lead iOS and Mobile App Security Engineer
2024 - 2026
Chronicle Creations Inc
- Led the development of an AI-powered story platform (Swift 6 and SwiftUI) with 99.9% uptime across 100,000+ MAUs.
- Improved API performance by 25% by refining concurrency, optimizing network layers, and introducing caching.
- Reduced QA defects by 25% through improved onboarding, coding standards, and CI-driven automation.
- Designed secure, modular authentication flows leveraging token-based protocols and SSL pinning.
- Handled security and prompt architecture. Designed secure execution environments for Bedrock AI agents, ensuring that data passed between the mobile client and the AI models strictly adhered to enterprise security and sandboxing constraints.
- Contributed to AI workflow implementation. Orchestrated and deployed generative AI capabilities utilizing AWS Bedrock AgentCore for 16 months, enabling intelligent data processing and automated threat-pattern analysis within a mobile ecosystem.
Technologies: Swift, SwiftUI, CI/CD Pipelines, Xcode, XCTest, XCUITest, Object-oriented Programming (OOP), AWS Amplify, Firebase, Lottie-iOS, AVFoundation, GitHub Actions, Agile, Jira, MVVM-C, Testing, Social Media Login, iPadOS, Mobile, Mobile App Development, AppKit, Artificial Intelligence (AI), APIs, Payment APIs, PDF, Leadership, Mobile Development, User Interface (UI), Engineering, Generative Artificial Intelligence (GenAI), App Store, Google Analytics, Python, Python Script, Mobile App Security, SSL, Obfuscation, Reverse Engineering, Apple Pay, In-app Purchases, App Store Acceptance Process, TestFlight, App Store Connect, Supabase, Supabase Auth, Coding, Minimum Viable Product (MVP), Education Technology (Edtech), Learning, AI Integration, AI Model Integration, Apple Subscriptions, Subscriptions, AI-assisted Development, WatchOS, WatchOS UI, Apple HealthKit, IP Protection, Debugging, Instrumentation, IT Security, Scalability, Claude, Claude Code, Claude API, Claude Agent SDK, App Reviews, Code Review, Mobile Apps, Lottie, Lovable, Amazon Web Services (AWS), Prompt Engineering, Authentication, Media Compression, AI Algorithms, Computational Mathematics, App Development, Native Mobile Apps, UI Animation, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, WidgetKit, DevOps, Offline-first Development, Large Language Models (LLMs), Codex, Maps, Integration, Payments, Auth0, Webhooks, Payment Gateways, Full-stack Development, Microservices, Social Media, App Design, HTML5, Apps, StoreKit, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Agentic Engineering, 2D Games, Game Development, Mobile Games, Mobile Game Development, Unity, iPad, Algorithms, Geofencing, Payment Processing, Technical Leadership, Database Architecture, OpenAI, Next.js, Security, Anti-fraud, Penetration Testing, AWS Lambda, Amazon Aurora, Amazon Cognito, Modernization, Django, Datadog, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), AI Development, Streaming, Videos, Cloud Storage, Video Streaming, Docker, EMR, Stress Testing, Go, API Development, OpenTelemetry, Cybersecurity, Bluetooth, Location Services, Location Tracking, Hardware, AI Engineering, Agentic AI, Agentic Coding, Cursor AI, REST APIs, AI Agent Orchestration, AI Agents, Agentic Frameworks, Model Context Protocol (MCP), Plugins, Role-based Access Control (RBAC), Vertex AI, Code Auditing, Startups, Solution Architecture, Enterprise Resource Planning (ERP), Project Management, Application Security, Authorization, Cloud Infrastructure, Automated Testing, Front-end, Networking, Mobile Architecture, Network Architecture, Cloud, AI Tools, Continuous Delivery (CD), Continuous Integration (CI), Agentic RAG Systems, RAG Architecture, Cloud Platforms, AVPlayer, HTTP Live Streaming (HLS), AirPlay, tvOS, AI-generated Code, Analytics, Mobile UX, UI Design
Senior Software Engineer, iOS
2022 - 2024
Screening Eagle Technologies
- Designed reusable, modular SDKs integrated across multiple product lines, reducing integration time by 25%.
- Built real-time data and visualization features using WebSockets, Combine, and Charts for cross-platform environments.
- Migrated legacy Objective-C modules to Swift and SwiftUI, reducing technical debt and improving maintainability.
- Led an automated testing strategy, significantly increasing release stability for a multi-team organization.
Technologies: iOS, Swift, UIKit, SwiftUI, iOS SDK, XCTest, Mixpanel iOS SDK, Firebase, REST, Apple Pay, LiDAR, ARKit, PSPDFKit, GitLab CI/CD, Core ML, Jira, Agile, MVVM-C, Clean Architecture, XCUITest, CoreLocation, MapKit, Google+ iOS SDK, Social Media Login, OAuth 2, Mobile, Mobile App Development, AppKit, Artificial Intelligence (AI), APIs, User Interface (UI), Mobile Development, Leadership, Engineering, Mixpanel, Reverse Engineering, SSL, Obfuscation, Mobile App Security, SDK Security, SDKs, App Store, App Store Acceptance Process, TestFlight, App Store Connect, Google Maps, Apple Maps, Coding, C++, App Reviews, Code Review, Mobile Apps, Geolocation, Authentication, Media Compression, Core Bluetooth, Computational Mathematics, App Development, Apple Vision Framework, Native Mobile Apps, UI Animation, QR Codes, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, WidgetKit, Embedded Systems, Sensors & Actuators, Windows, Offline-first Development, Maps, Integration, Payments, Auth0, Webhooks, Payment Gateways, Microservices, SAP, SAP UI5, SAP Business Technology Platform (BTP), SAPUI5, OData, SAP ABAP, SAP CAP, SAP Cloud Application Programming Model, App Design, HTML5, Apps, StoreKit, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Algorithms, Geofencing, Payment Processing, Technical Leadership, Shopify, eCommerce, Security, Anti-fraud, Penetration Testing, Cryptography, Modernization, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), Streaming, Videos, Cloud Storage, Video Streaming, Stress Testing, GitLab, Cybersecurity, Bluetooth, Location Services, Location Tracking, Hardware, SAP Fieldglass, Reviews, Code Auditing, Solution Architecture, Enterprise Resource Planning (ERP), Application Security, Authorization, Automated Testing, Networking, Mobile Architecture, Continuous Delivery (CD), Continuous Integration (CI), Cloud Platforms, AVPlayer, HTTP Live Streaming (HLS), AirPlay, tvOS, Analytics, Mobile UX, UI Design
Senior iOS Engineer
2021 - 2022
Marn Technologies
- Built modular frameworks for hardware integrations, including scanners, printers, and terminals, improving developer velocity.
- Engineered low-latency local network communication protocols, achieving over 99% uptime in high-volume environments.
- Improved system reliability by introducing analytics-driven enhancements and performance instrumentation.
- Collaborated with product, QA, and back-end teams to streamline workflows and shorten release cycles.
Technologies: iOS, Swift, UIKit, SwiftUI, Tap payment, Mada, POS SDK, Epson SDK, Firebase iOS SDK, REST, Payment APIs, Agile, Jira, Model View ViewModel (MVVM), Unit Testing, Testing, CoreLocation, Google Maps SDK, Mobile, Mobile App Development, AppKit, APIs, Apple Pay, MacOS, App Store, App Store Acceptance Process, TestFlight, App Store Connect, Flutter, Dart, JavaScript, React Native, Node.js, Coding, Bluetooth Beacons, Internet of Things (IoT), App Reviews, Code Review, Stripe API, Mobile Apps, Lottie, Amazon Web Services (AWS), Geolocation, Authentication, Media Compression, Core Bluetooth, Computational Mathematics, App Development, Apple Vision Framework, UI Animation, Back-end, PostgreSQL, Full-stack, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, WidgetKit, Embedded Systems, Sensors & Actuators, Windows, Fastlane, Back-end Development, Maps, Integration, Payments, Auth0, Webhooks, Payment Gateways, Social Media, SAP, App Design, HTML5, Apps, StoreKit, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Algorithms, Geofencing, Payment Processing, Technical Leadership, Database Architecture, Shopify, eCommerce, Modernization, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), Expo, Streaming, Videos, Cloud Storage, Video Streaming, Stress Testing, Bluetooth, Location Services, Location Tracking, Hardware, SAP Fieldglass, Web Development, Reviews, Code Auditing, Inventory Management, Solution Architecture, Enterprise Resource Planning (ERP), Application Security, Authorization, Automated Testing, Networking, Mobile Architecture, Continuous Delivery (CD), Continuous Integration (CI), Cloud Platforms, AVPlayer, HTTP Live Streaming (HLS), tvOS, Analytics, Mobile UX, UI Design
Senior iOS Engineer, eCommerce and Loyalty
2019 - 2021
Cooperative Computing
- Delivered core iOS features used by millions of global users across multiple production apps.
- Reduced checkout flow failures by 12% by optimizing critical paths and simplifying UI interactions.
- Improved production reliability by 15% by driving monitoring, structured logging, and automated incident workflows.
- Accelerated release velocity 25% through CI/CD improvements and engineering process refinement.
Technologies: iOS, Swift, UIKit, OpenCV, Optical Character Recognition (OCR), Amplitude, REST, AVFoundation, Core Graphics, Core Animation, GitHub, Agile, OAuth, Azure, Model View ViewModel (MVVM), Unit Testing, Mobile, Mobile App Development, AppKit, APIs, Payment APIs, App Store, App Store Acceptance Process, TestFlight, App Store Connect, Coding, App Reviews, Code Review, Mobile Apps, Lottie, Amazon Web Services (AWS), Geolocation, Authentication, Media Compression, Core Bluetooth, Computational Mathematics, App Development, Apple Vision Framework, UI Animation, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, WidgetKit, Embedded Systems, Sensors & Actuators, Windows, Fastlane, Maps, Integration, Payments, Marketplaces, Auth0, Payment Gateways, Social Media, SAP, App Design, HTML5, Apps, StoreKit, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Algorithms, Geofencing, Payment Processing, eCommerce, Modernization, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), Streaming, Videos, Cloud Storage, Video Streaming, Stress Testing, Bluetooth, Location Services, Location Tracking, Hardware, Code Auditing, Inventory Management, Solution Architecture, Enterprise Resource Planning (ERP), Authorization, Automated Testing, Networking, Mobile Architecture, Continuous Delivery (CD), Continuous Integration (CI), Cloud Platforms, AVPlayer, HTTP Live Streaming (HLS), tvOS, Analytics, Mobile UX, UI Design
Enterprise SAP Integration Engineer
2018 - 2020
Large US Enterprise Client
- Architected secure OData services via SAP Gateway to expose enterprise data for external platforms.
- Engineered robust RESTful APIs utilizing ABAP to synchronize complex SAP ECC datasets in real time.
- Integrated legacy SAP modules with cloud applications, enforcing strict OAuth access controls.
- Optimized back-end data retrieval workflows, ensuring low-latency transaction processing at scale.
- Built highly decoupled integration layers bridging internal SAP infrastructure with web environments.
- Executed secure SAP middleware integrations utilizing BAPI to validate strict product datasets.
Technologies: SAP Gateway, OData, ABAP, SAP NetWeaver, REST APIs, SAP ECC, SAP Remote Function Call (RFC), System Integration, System Integration Testing (SIT), Workflow Automation & System Integration, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Algorithms, Geofencing, .NET, Relational Databases, Event-driven Architecture, Cloud Storage, Stress Testing, Back-end, Go, API Development, OpenTelemetry, Bluetooth, Location Services, Location Tracking, MySQL, Vendor Management, SAP, SAP Fieldglass, Web Development, Code Auditing, Inventory Management, Solution Architecture, SaaS, Redis, ERP django, Project Management, Authorization, Cloud Infrastructure, Automated Testing, Data Modeling, Front-end, Networking, Network Architecture, SAP S/4HANA, Cloud, SAP Basis, SAP ERP, Continuous Delivery (CD), Continuous Integration (CI), Cloud Platforms, Analytics
Senior iOS Engineer
2018 - 2019
Invision Solutions
- Developed two applications single-handedly. Improved app reliability through faster development cycles and introduced unit testing for junior developers, reducing defects by 40%.
- Performed development and handled management of iOS mobile apps.
- Evaluated ongoing projects technically and performed code previews.
- Managed projects and defined requirements, scoping, and goals. Handled version control using tools like Git.
Technologies: iOS, Swift, RxSwift, UIKit, MapKit, Google+ Authentication, Firebase iOS SDK, Unit Testing, Git, Bitbucket, App Store, Objective-C, App Store Acceptance Process, TestFlight, App Store Connect, Coding, App Reviews, Code Review, Mobile Apps, Lottie, Kingfisher, Amazon Web Services (AWS), Geolocation, Authentication, App Development, UI Animation, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, Fastlane, Google Cloud Platform (GCP), Maps, Integration, Payments, Marketplaces, Payment Gateways, App Design, HTML5, Apps, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Algorithms, Geofencing, Payment Processing, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), Expo, Cloud Storage, Stress Testing, Bluetooth, Location Services, Location Tracking, Code Auditing, Inventory Management, Solution Architecture, Project Management, Authorization, Automated Testing, Networking, Mobile Architecture, Continuous Delivery (CD), Continuous Integration (CI), Cloud Platforms, AVPlayer, HTTP Live Streaming (HLS), Analytics, Mobile UX, UI Design
Senior iOS Engineer
2017 - 2018
Lutebox
- Handled mobile app development. Team management was my core responsibility.
- Designed public-facing Swift SDKs with documentation and versioning, reducing support requests by 30% and speeding partner onboarding.
- Achieved 90% client satisfaction with initial product mockups and delivered 4 major updates on time.
- Coordinated feature rollouts with less than 1% downtime.
Technologies: iOS, iOS SDK, Firebase iOS SDK, Google Cloud, REST, AVFoundation, Google Maps SDK, Google Location API, Google+ Authentication, Apple Pay, App Store, Objective-C, App Store Acceptance Process, TestFlight, App Store Connect, Mobile Apps, Lottie, Kingfisher, Amazon Web Services (AWS), Geolocation, Authentication, App Development, Android, UI Animation, Back-end, User Experience (UX), App Intents, Deep Linking, Architecture, iOS Native Libraries, Fastlane, Google Cloud Platform (GCP), Maps, Integration, Payments, Marketplaces, Payment Gateways, App Design, HTML5, Apps, iPhone, Bug Fixes, IT Audits, Software Testing, Planning, Manual QA, Data Extraction, Algorithms, Geofencing, Payment Processing, Relational Databases, Event-driven Architecture, LLDB, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), Cloud Storage, Stress Testing, Bluetooth, Location Services, Location Tracking, Code Auditing, Inventory Management, Solution Architecture, Project Management, Authorization, Automated Testing, Networking, Mobile Architecture, Network Architecture, Machine Learning Operations (MLOps), Continuous Delivery (CD), Continuous Integration (CI), Cloud Platforms, AVPlayer, HTTP Live Streaming (HLS), Analytics, Mobile UX, UI Design
Project History
Dreambook Kids
https://dreambook.kids/Dreambook transforms complex technologies into accessible and child-friendly features that empower kids to express their creativity with ease, allowing children to focus on imagination and storytelling.
Screening Eagle Inspect
https://apps.apple.com/ca/app/screening-eagle-inspect/id1520348552Screening Eagle Inspect is the world's first intelligent and intuitive solution specifically developed for managing inspection data and workflows. A seamless experience makes inspections efficient, traceable, collaborative, and intelligent, with actionable dashboards and deep dynamic reporting.
Pampers Rewards
https://apps.apple.com/us/app/pampers-rewards/id1224627026I built a high-performing iOS app in Swift and SwiftUI that enables users to scan diaper and wipes QR codes to earn rewards. I integrated real-time rewards tracking, personalized parenting content, milestone tools, and a seamless redemption flow for coupons, gift cards, and charitable donations. I also enhanced user engagement with intuitive UI and reliable back-end syncing for millions of active users.
Marn POS
https://apps.apple.com/us/app/marn/id1495693049I developed native iOS features in Swift for managing employee profiles, inventory tracking, and product catalog management within a cloud-based POS solution. I also designed intuitive interfaces and implemented seamless role-based access control, streamlining operations for merchants in retail and restaurant settings.
Garage POS
https://apps.apple.com/sa/app/garage-pos/id1454372626I developed a secure, iPad-centric POS system in Swift tailored for automotive service businesses. This system includes features such as vehicle profile management based on license plate and VIN, real-time inventory and sales tracking, and support for multiple payment methods. I integrated Epson and Zebra printers for seamless receipt and report generation. Additionally, the system enables comprehensive data capture, including checklists, multimedia notes, and X/Z reports, significantly enhancing operational efficiency and customer satisfaction.
RuntimeGuard SDK: iOS Runtime Defense Framework
https://sentinelden.com/sdk/runtimeguard/A hardened iOS runtime-defense framework featuring five concurrent scanners, jailbreak filesystem heuristics (covering rootless overlays like /var/jb/), Mach-O integrity checks (LC_ENCRYPTION_INFO_64.cryptid for re-signed binaries), loaded dylib inspection (Frida and ElleKit injection regardless of agent rename), kernel-level debugger detection via sysctl(KERN_PROC, etc.), and screen-capture detection, all aggregated into a typed SecurityReport.
The framework also includes App Attest integration for server-side trust. Built using public iOS APIs only, it uses PrivacyInfo.xcprivacy to declare required-reason categories at the precise reason-code level (3B52.1, 35F9.1). Designed for iOS 17+, it ships as a code-signed .xcframework with a hardware-uptime-anchored license clock.
The framework also includes App Attest integration for server-side trust. Built using public iOS APIs only, it uses PrivacyInfo.xcprivacy to declare required-reason categories at the precise reason-code level (3B52.1, 35F9.1). Designed for iOS 17+, it ships as a code-signed .xcframework with a hardware-uptime-anchored license clock.
PayloadGuard SDK: iOS Networking Defense
https://sentinelden.com/sdk/payloadguard/An iOS networking defense SDK that hardens the URLSession path against corporate MITM proxies, in-process tampering, and certificate trust manipulation. It implements three-pin SPKI validation across the full SecTrust chain, along with payload encryption above TLS using ephemeral P-256 ECDH against an embedded server public key, HKDF-SHA256 key derivation, and AES-256-GCM sealing with AAD-bound counters, millisecond timestamps, and per-route context tags. The SDK also ships with server-side decryption reference implementations in Node.js, Python, and Go, as well as pinned WebSocket support with automatic rekeying. It composes with SentinelSDK, so payloads refuse to seal on compromised devices.
AgenticGuard SDK: On-device LLM Agent Sandbox
https://sentinelden.com/sdk/agenticguardAn iOS sandbox for on-device LLM agents using Apple Foundation Models, MLX, Core ML, and custom runtimes. It defends against three classes of agent failure: prompt injection through structurally separated system, user, and retrieved channels with a heuristic-plus-small-model classifier; capability escalation through a typed tool registry with schema validation, per-tool quotas, and OS-level confirmation gates; and data exfiltration through a typed AgentNetworkPolicy with domain allowlists and shape constraints. The platform also includes a hash-chained audit trail with entries signed by a Secure Enclave-backed P-256 key, verifiable off-device through a documented 81-byte canonical layout. It uses a fail-closed verify(intent:) approach, with internal errors materializing as .deny.
EnclaveVault SDK: Apple Secure Enclave Wrapper
https://sentinelden.com/sdk/enclavevaultA typed Swift wrapper around Apple's Secure Enclave that prevents the failure mode where forgetting kSecAttrTokenIDSecureEnclave silently downgrades to a software keychain key, an invisible-by-default bug found in many production iOS apps. It implements BiometricPolicy as code, including invalidation (biometryCurrentSet vs. biometryAny), passcode fallback (.allow vs. .deny), retry behavior, and prompt strings, each exposed as a typed argument rather than a magic flag. The framework also requires an explicit FallbackPolicy argument, so host applications must choose between .requireHardware and .keychainFallback. The CI-grade attestEnclaveResidency() primitive uses SecKeyCopyAttributes to verify that the key was actually stored in the Secure Enclave hardware.
SentinelDen Studio: macOS App for iOS Binary Audits
https://sentinelden.com/audit/A notarized macOS application for security auditing iOS binaries (.ipa, .xcframework, and .xcarchive). The rule-pack engine includes built-in coverage for OWASP MASVS, iOS privacy manifests, crypto hygiene, network policy, and anti-tampering patterns, with support for custom packs via YAML. An attack-chain engine runs dynamic instrumentation scenarios including MITM proxy substitution, re-encoded IPA replay, Frida injection probes, and screen-recording detection. The platform also supports signed report exports in PDF, JSON, and HTML formats for compliance and audit teams. Distributed with a signed Developer ID, Apple notarization, and stapling, the update manifest is delivered as an ECDSA-P256-signed JSON envelope.
Education
2008 - 2010
Master's Degree in English and Computer Programming
SALU Pakistan - Pakistan
2006 - 2008
Bachelor's Degree in Arts and Computer Programming
SALU Pakistan - Pakistan
Certifications
DECEMBER 2011 - PRESENT
Mobile App Software Development Bootcamp
SSUET Karachi, Pakistan
Skills
Libraries/APIs
AWS Amplify, Lottie-iOS, Mixpanel iOS SDK, Firebase iOS SDK, OpenCV, Core Graphics, Core Animation, Google Maps SDK, Google+ iOS SDK, RxSwift, Google Location API, Node.js, Google Maps, Apple Maps, WebRTC, Apple Subscriptions, Google Maps API, Stripe, Claude API, Stripe API, Kingfisher, React, iOS Native Libraries, REST APIs, React Testing Library, FFmpeg, API Development, Vue, Vue 3, PyTorch, NumPy, PiLLoW
Tools
Xcode, GitLab CI/CD, GitHub, Jira, CoreLocation, Git, Bitbucket, Google Analytics, TestFlight, SAP UI5, Apple HealthKit, Claude, Claude Code, Claude Agent SDK, Fastlane, Codex, Auth0, SAPUI5, SAP S/4HANA, Expo, Amazon Cognito, LLDB, GitLab, SAP Fieldglass, AVPlayer, SAP SDK, SAP Fiori, Esri, Capacitor, SAP Remote Function Call (RFC), Sentry
Languages
Swift, Python, Python Script, Objective-C, JavaScript, Java, C++, TypeScript, Kotlin, GraphQL, HTML5, Go, Dart, SQL, CSS, HTML, ABAP
Frameworks
SwiftUI, Core ML, ARKit, XCTest, XCUITest, UIKit, iOS SDK, MapKit, OAuth 2, AppKit, React Native, API Framework, Apple CryptoKit, Core Motion, Tailwind CSS, Core Bluetooth, Apple Vision Framework, App Intents, WidgetKit, StoreKit, Unity, Next.js, .NET, Django, Android SDK, Agentic Frameworks, Flutter, SAP Gateway
Paradigms
Unit Testing, Object-oriented Programming (OOP), Mobile App Design, REST, Agile, Clean Architecture, Model View ViewModel (MVVM), Testing, Mobile Development, Code Refactoring, Foundation Models, App Development, DevOps, Offline-first Development, Microservices, Software Testing, Penetration Testing, HIPAA Compliance, Event-driven Architecture, Stress Testing, Model Context Protocol (MCP), Role-based Access Control (RBAC), Automated Testing, Continuous Delivery (CD), Continuous Integration (CI), UI Design, ABAP Managed Database Procedures (AMDP)
Platforms
iOS, VisionOS, Firebase, Azure, Mobile, MacOS, Mixpanel, Android, WatchOS, Amazon Web Services (AWS), Oracle Integration Cloud (OIC), Windows, Google Cloud Platform (GCP), SAP ABAP, SAP NetWeaver, Shopify, AWS Lambda, Docker, Vertex AI, Vercel, tvOS, SAP Mobile, Replit
Storage
SQLite, PostgreSQL, Database Architecture, Amazon Aurora, Datadog, Relational Databases, MySQL, Redis, Google Cloud, SQL Sentry
Industry Expertise
Cybersecurity, Project Management, Social Media
Other
AVFoundation, CI/CD Pipelines, IT Troubleshooting, Mobile App Development, Apple Pay, LiDAR, PSPDFKit, GitHub Actions, Tap payment, Mada, POS SDK, Epson SDK, Payment APIs, Optical Character Recognition (OCR), Amplitude, OAuth, MVVM-C, Social Media Login, iPadOS, Google+ Authentication, APIs, PDF, Bluetooth Beacons, WebSockets, Tap Payments, POS, Leadership, User Interface (UI), Engineering, Generative Artificial Intelligence (GenAI), App Store, Reverse Engineering, SSL, Obfuscation, Mobile App Security, SDK Security, In-app Purchases, SDKs, App Store Acceptance Process, App Store Connect, GPS Integration, GPS, RoomPlan, Coding, Push Notifications, Messaging, SAP, Internet of Things (IoT), Computer Vision, Machine Learning, Software Architecture, Minimum Viable Product (MVP), Education Technology (Edtech), Learning, AI Integration, AI Model Integration, Subscriptions, API Integration, System Integration, Performance Optimization, AI-assisted Development, VisionKit, Frameworks, Security, Mach-O, App Attest, DeviceCheck, Jailbreak Detection, Frida Detection, Runtime Defense, SDK Development, P-256 ECDSA, TLS Pinning, SPKI Hashing, AES-GCM, ECDH P-256, HMAC Key Derivation function (HKDF), Network Security, MITM Defense, Replay Protection, Cryptographic Protocol Design, LLM Security, Prompt Injection Defense, On-device AI, MLX, ECDSA-P256, Hash Chains, Audit Logging, Sandboxing, SecKey, SecAccessControl, LocalAuthentication, FaceID, TouchID, Biometric Authentication, Key Storage, LAContext, Hardware-backed Crypto, macOS Development, iOS Security Audit, Mach-O Analysis, Notary, Code Signing, Binary Analysis, OWASP MASVS, Static Analysis, Dynamic Instrumentation, DMG Distribution, Tracking, WatchOS UI, IP Protection, Debugging, Instrumentation, IT Security, Scalability, App Reviews, Code Review, Vulnerability Assessment, Auditing, Audits, Mobile Apps, Lottie, Lovable, Prompt Engineering, Geolocation, Authentication, Media Compression, AI Algorithms, Computational Mathematics, Native Mobile Apps, UI Animation, Back-end, QR Codes, Full-stack, User Experience (UX), Deep Linking, Architecture, Enterprise Integration, Amazon Bedrock AgentCore, Generative AI Integration, Embedded Systems, Sensors & Actuators, Google Play Store, Large Language Models (LLMs), Back-end Development, Maps, Integration, Payments, Marketplaces, Webhooks, Payment Gateways, Full-stack Development, SAP Business Technology Platform (BTP), OData, SAP CAP, SAP Cloud Application Programming Model, SAP ECC, App Design, Apps, iPhone, Bug Fixes, IT Audits, Planning, Manual QA, Data Extraction, Agentic Engineering, 2D Games, Game Development, Mobile Games, Mobile Game Development, iPad, Algorithms, Geofencing, Payment Processing, Technical Leadership, OpenAI, eCommerce, Anti-fraud, Cryptography, Modernization, Mobile Device Management (MDM), iOS Mobile Device Management (MDM), AI Development, Streaming, Videos, Cloud Storage, Transcoding, Video Streaming, EMR, Healthcare Software, OpenTelemetry, Bluetooth, Location Services, Location Tracking, Hardware, AI Engineering, Agentic AI, Agentic Coding, Cursor AI, Vendor Management, Web Development, Reviews, AI Agent Orchestration, AI Agents, Plugins, Code Auditing, Startups, Inventory Management, Lightspeed, Solution Architecture, Multi-tenant Architecture, Multi-tenant SaaS, SaaS, Enterprise Resource Planning (ERP), ERP django, Application Security, Authorization, Cloud Infrastructure, Data Modeling, Front-end, Networking, Mobile Architecture, Network Architecture, Cloud, SAP Basis, SAP ERP, Cloudflare, AI Safety, AI Security, Agentic AI Systems, Cloud Security, Machine Learning Operations (MLOps), AI Tools, Agentic RAG Systems, RAG Architecture, Cloud Platforms, HTTP Live Streaming (HLS), AirPlay, Personalization, React Native Bridge, AI-generated Code, Analytics, Mobile UX, Artificial Intelligence (AI), Yapdatabase, Supabase, Supabase Auth, MDK, SSAM, AI Pipeline, Rive, Eye Tracking, STB, CAMP, SAP Migration, SAP Open Data Protocol (OData), BAPI, ABAP Debugging, ABAP Enhancements, ABAP Core Data Services, ABAP RESTful Application Programming Model (RAP), System Integration Testing (SIT), Workflow Automation & System Integration, native Expo modules, react-native-vision-camera (frame processors), react-native-worklets-core, AsyncStorage, YOLO object detection, Ultralytics, coremltools, dataset curation and hand-labelling, model evaluation and gating, Storage, Row-level Security (RLS), SQL schema migrations, Node.js REST services, Gemini and Claude APIs, EAS Build, node:test, Mutation Testing, technical writing for non-technical stakeholders
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring