Malik Hashim
Verified Expert in Engineering
Software Engineer and Developer
Lahore, Punjab, Pakistan
Toptal member since April 17, 2026
Senior software engineer with 6+ years building/shipping full-stack products, end-to-end backends, web frontends, cross-platform mobile, and the AWS/CI-CD pipelines that deliver them. He adds LLM-powered features, chat, retrieval over user data, voice, and agentic workflows from model integration to production. 10+ products shipped across AI-powered health apps, real-time surveillance and ridesharing platforms, and enterprise white-label products, with leadership and direct client ownership.
Portfolio
Experience
- React Native - 7 years
- Mobile App Development - 7 years
- Flutter - 7 years
- Amazon Web Services (AWS) - 6 years
- Xcode - 6 years
- Visual Studio Code (VS Code) - 6 years
- Docker - 6 years
- Artificial Intelligence (AI) - 5 years
Preferred Environment
Android Studio, Xcode, React Native, Flutter, Docker, AI Agents, Large Language Models (LLMs), Chatbots, Prompt Engineering, AI/ML Workloads, Command-line Interface (CLI), Computer Science
The most amazing...
...solution I've built is an AI-powered mobile application that automated workflows and scaled to thousands of users with real-time performance.
Work Experience
Technical Operator for LLM Evaluation Enhancement
Vetto Inc
- Generated and recorded high-quality interaction data across unfamiliar computer environments to improve training signals for large language models.
- Executed exploratory throughput tasks in Linux environments to produce evaluation signals that strengthened LLM training and assessment.
- Navigated and manipulated unfamiliar systems and open-source tools independently to extract actionable insights for model improvement.
- Collaborated with the team to validate generated interaction patterns, ensuring quality and consistency of evaluation data.
- Iterated continually on exploration and data-collection methods to increase efficiency and throughput of recorded tasks.
- Applied a generalist engineering skill set across multiple languages to debug and probe systems and surface edge-case behaviors.
Lead Software Engineer | Technical Lead
Verasana
- Directed the end-to-end development of over eight white-label mobile applications for US-based fitness and wellness businesses using Flutter and React Native, delivering scalable and customizable solutions.
- Managed client communication, built features such as video courses, in-app chat, and performance tracking, and integrated services including Mux, Sentry, Google Cloud Storage, and Stream.
- Managed a team of three and streamlined CI/CD pipelines using Fastlane, ensuring smooth deployments and successful App Store submissions across multiple products.
Web & Mobile Engineer
HHRC
- Developed a Flutter-based mobile companion application for the HHRC court case management system, integrated with Liferay and React web platforms to streamline case workflow.
- Implemented dynamic form builders with custom logic, improving efficiency in case creation, editing, and review processes across multiple user roles.
- Created microfrontend packages to enable modular architecture and seamless integration across cross-functional development teams.
Full-stack Engineer
Atualizado
- Developed a cross-platform Flutter ride-sharing app with a MERN back end and PostgreSQL, enabling real-time tracking, dynamic routing, and bus route merging.
- Implemented Dijkstra’s shortest path algorithm for bus routing, reducing travel time by 30% and improving route efficiency.
- Integrated WebSockets, Redis, AWS CloudFront, Google Maps API, and Firebase, achieving 60% faster real-time updates and scalable performance.
Experience
CRV Surveillance
I built modules for technician and contractor management, job assignments, and site visits, with full field activity reporting. I also architected a comprehensive invoicing and billing system covering invoice generation, payment records, status tracking, and contractor payouts. Finally, I implemented Microsoft Authentication Library (MSAL) authentication with role-based access control for admins, technicians, and contractors.
Contractor Mobile
Designed and implemented advanced workflows using Botpress to power an AI-driven chatbot, automating customer interactions, reducing response time, and significantly improving user engagement and support efficiency.
NephroFit (Chronic Kidney Disease App)
Education
Bachelor's Degree in Computer Science
National University of Sciences & Technology (NUST) - Islamabad, Pakistan
Skills
Libraries/APIs
React, Node.js, Google Maps API, Microsoft Authentication Library (MSAL), Pydantic, Google APIs, Google Workspace APIs, Apollo Client, RxJS, REST APIs, Stripe API, Claude API, Vue, Fabric.js, AWS Amplify, Stripe, React Native for Web, Spotify API, OpenAPI, Google Maps, Apigee, Playwright, QuickBooks API, OpenAI API, Uber API, API Development, Puppeteer, LinkedIn API, Shopify API, Stripe Connect, Google Calendar API, Google Play API, Vue 3, React Navigation, WhatsApp API, vLLM, Three.js, Twilio API, GraphQL API
Tools
Android Studio, Xcode, Git, Sentry, Fastlane, Jira, Claude, Asana, Stencil.js, Wix, GitLab, Expo, Claude Code, Prisma, n8n, Shadcn, ChatGPT, Zapier, Figma, GitHub, TestFlight, Slack, Google Sheets, Microsoft Excel, Terraform, Qualtrics, Firebase Authentication, Firebase Cloud Messaging (FCM), Codex, Apple Push Notifications, Azure OpenAI Service, BigQuery, NPM, Hotwire, Whisper, Zoom, Pytest, Shopify Plus, Auth0, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS), AWS IAM
Languages
Dart, TypeScript, CSS, JavaScript, Python, Python 3, GraphQL, CSS3, Swift, C++, Objective-C, HTML, Kotlin, Java, Rust, HTML5, SQL, Go, Snowflake, Ruby, Shopify Liquid
Frameworks
React Native, Flutter, Next.js, Bootstrap, Angular, AppKit, SwiftUI, Tailwind CSS, LangGraph, NestJS, Express.js, Botpress.io, .NET, Django, OAuth 2, Jest, Swagger, Spring Boot, Laravel, Selenium, Scrapy, Nuxt.js, Redux, AWS HA, Ruby on Rails (RoR), Ruby on Rails 7, Streamlit, Core ML, Payload CMS, Electron
Paradigms
Microfrontends, Agile, E2E Testing, Unit Testing, Code Refactoring, Role-based Access Control (RBAC), Hosting, Refactoring, Continuous Delivery (CD), Continuous Integration (CI), B2B, HIPAA Compliance, Automation, UI Design, Web UI Design, Mobile Development, Model Context Protocol (MCP), Real-time Systems, Low-code Development, Cross-platform, Database Design, Microservices, Microservices Architecture, Back-end Architecture, Web App Design, Event-driven Architecture, Fast Healthcare Interoperability Resources (FHIR), UX Design, DevOps, Agile Product Management, Marketplace Platforms, Testing, Object-oriented Design (OOD), Web Application Architecture, Clean Code, Desktop App Development, REST, Automated Testing
Platforms
MacOS, Visual Studio Code (VS Code), Firebase, Docker, Amazon Web Services (AWS), Vercel, Google Cloud Platform (GCP), Android, Vertex AI, iOS, Azure, HubSpot, Twilio, Google Ads, WordPress, Shopify, Webflow, Mapbox, Blockchain, Mobile, Replit, Calendly, Azure Functions, Microsoft Power Automate, SharePoint, Kubernetes, Web, Apache Kafka, AWS IoT, LangSmith, Android TV, WooCommerce, AWS Lambda
Storage
Google Cloud Storage, PostgreSQL, Data Pipelines, Redis, MySQL, SQLite, Data Validation, MongoDB, Amazon S3 (AWS S3), Cloud Firestore, Databases, JSON, Database Architecture, NoSQL, Database Management, Azure SQL, Neo4j, Amazon DynamoDB, Google Cloud
Industry Expertise
Accounting, Healthcare, Project Management, Web Design, Automotive, Telecommunications
Other
Data Structures, Algorithms, IT Product Management, Web Development, Mobile App Development, Artificial Intelligence (AI), Chatbots, mux, stream, CI/CD Pipelines, Liferay, Architecture, prismaORM, waveSync, Finance, User Interface (UI), Full-stack, FastAPI, APIs, Data Modeling, Full-stack Development, OpenAI, Large Language Models (LLMs), Workflow Automation, Web Components, AI-assisted Development, API Integration, Performance Optimization, System Integration, AI Integration, Back-end, WebSockets, Strapi, Software, Supabase, Software Development, Debugging, LangChain, Prompt Engineering, AI Engineering, Application State Management, Authentication, Authorization, Webhooks, Code Deployment, DOM, Integration Testing, MERN Stack, AWS CLOUDFRONT, twilio A2P, Integration, Back-end Development, CRM, OAuth, Payments, Code Auditing, Gemini API, Google Play Store, Perplexity, SaaS, User Experience (UX), Real-time Data, Server Sent Events (SSE), HIPAA, Healthcare IT, Healthtech, Health, Healthcare EDI, Front-end, AI Tools, Cursor AI, Open Source, AI Automation, Agentic AI, Agentic AI Systems, Infrastructure, Software Architecture, AI Systems, Cloudflare, Fitness, Figma Make, AI Agents, Speech-to-Text (STT), Dashboards, SMS, Minimum Viable Product (MVP), Infrastructure as Code (IaC), Mobile Apps, Cloud Infrastructure, Developer Relations, No-code Development, App Store, Bug Fixes, Push Notifications, Third-party APIs, User Authentication, Startup Consulting, Technical Project Management, API Gateways, Payment APIs, Communication, Tailwind UI, Cloud Services, Code Review, Security, Technical Leadership, Browser Automation, Data Analysis, Product Development, Product Management, Automations, Microsoft Graph API, Workflows, AI Agent Orchestration, Machine Learning, Vibe Coding, AWS Cloud Architecture, DocuSign, Fintech, Email Automation, Event-driven Systems, Workflow Automation & System Integration, PDF, Retrieval-augmented Generation (RAG), Logistics, Application Modernization, Document Processing, Real Estate, AI Development, Cloud Architecture, Computer Vision, Startups, Google Ad Manager, Google Advertising, Ads, Scraping, Maps, Payment Processing, SaaS Architecture, System Architecture, Deep Learning, Object Detection, Invoicing, Optical Character Recognition (OCR), Web Scraping, Data Engineering, LinkedIn, API Design, API Documentation, AI Architecture, Consulting, Booking, Hotels & Lodging, Reservation Flow, Booking Apps, Rentals, Appointment Booking, Money Transfers, Transactions, QR Codes, Data Privacy, Data Visualization, AI/ML Workloads, ChatGPT API, Gemini, Cloud, Generative Artificial Intelligence (GenAI), Calendars, Firebase Cloud Functions, RESTFul APIs, Command-line Interface (CLI), Computer Science, Website Performance, Base44, Data Science, Leadership, Solution Architecture, GitHub Actions, Human Resources (HR), Multitenancy, Progressive Web Applications (PWAs), Agentic Workflow Design, Terraform Cloud, AI Product Strategy, Agentic RAG Systems, Enterprise Software, Third-party Integration, Vector Databases, Front-end Development, Game Development, Web3, Low Latency, Trading, LLM Integration, Integrations, Supabase Auth, Maintenance, System Design, Medical Imaging, Live Chat, ServiceNow, Software as a Service (SaaS), Web Applications, Workflow, Multi-tenant SaaS, Marketplaces, Technical Consulting, Anthropic, UI Development, Performance, Privacy, Multi-agent Systems, eCommerce, Zoho, Charts, Data Analytics, Geolocation, HIPAA Electronic Data Interchange (EDI), I am buying a company and want an expert to review the code to make sure that it does what the seller says it does and as a second step to make it more efficient so that I can copywrite it, Onboarding, Project Consultancy, Web Extensions, Cloud Storage, Website Design, Website Redesign, Websites, Branding, Design, Chrome Extensions, CTO, Hands-on Implementation, High Code Quality, Enterprise Architecture, AI-generated Code, Software Engineering, Azure AI Document Intelligence, Data Processing, RAG Architecture, Scalability, Distributed Systems, Agentic Coding, Cross-platform App Development, Native Mobile Apps, Real-time Tracking, Conversational AI, Web App Development, Knowledge Graphs, Figma to React, Advisory, IT Consulting, SMS Bots, SMS Marketing, WhatsApp, WhatsApp Business, Technical Architecture, Training, Education Technology (Edtech), Platforms, Multi-tenant Architecture, Server-side Rendering (SSR), Monorepos, Turborepo, OpenID Connect (OIDC), Compliance, Data Scraping, Reports, Data, Orchestration, Big Data, MVP Design, Billing, Front-end Architecture, Software Design, Hooks, AI Voice Agents, ElevenLabs Solutions, AI Chatbots, Medical Software, Event Streaming, Dashboard Development, Medical Devices, Legacy Code, AI Design, AI Programming, Planning, GPS, Fractional CTO, Application Security, IT Security, Web Security, AI Governance, AI Testing, Software Documentation, Package Design, Financial Services, Apple Pay, Google Pay, Lovable, Vite, Shopify Theme, Payment Gateways, Shopify Customizations, Shopify Design, Meta API, CSV, Excel Expert, Excel 365, Storybook, Web Application Design, Financial Markets, Android Development, Media, Streaming, Spotify, Speech Recognition, Text-to-Speech (TTS), Ruby on Rails, Responsive UI, CMS, Data Extraction, Reporting, Team Leadership, Enterprise, Solution Engineer, Coding, Microsoft Azure, Secure Coding, Audio Streaming, NetSuite, RAG Systems, Booking Systems, AI Model Training
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