Abdul Mateen Chughtai
Verified Expert in Engineering
Mobile Engineer and Developer
Islamabad, Islamabad Capital Territory, Pakistan
Toptal member since August 31, 2026
Abdul is a mobile engineer with seven years of experience building native Android apps and SDKs used daily by millions of people. From payment integrations for a 10+ million download ride-hailing app to a fraud detection platform handling 10+ million daily requests, Abdul has both depth and breadth of hands-on experience in building large-scale solutions. He is meticulous about clean architecture, great UX, and shipping software that holds up in production.
Portfolio
Experience
- Mobile - 7 years
- Android - 7 years
- Software Development - 7 years
- Kotlin - 7 years
- Advertising Technology (Adtech) - 4 years
- JavaScript - 4 years
- React Native - 3 years
- Python - 3 years
Preferred Environment
Android, Kotlin, Dependency Injection, Google Maps, Stripe, Firebase, Payments, Advertising Technology (Adtech), Fraud Detection, JavaScript
The most amazing...
...work I've shipped is integrating Paymob and M-PESA for a unicorn ride-hailing app, unlocking payments for millions of users across South America and Africa.
Work Experience
Engineering Manager, Mobile and Ad Fraud Detection
MonetizeMore
- Spearheaded a cross-functional team of five engineers to build and scale an ad fraud detection system handling over 10+ million daily requests.
- Drove the development of new features in the ad fraud detection pipeline to decrease invalid traffic rates by up to 50% for clients.
- Collaborated with data science and machine learning teams to productionize ML models, enhancing mobile invalid traffic detection and reducing invalid traffic from mobile sources by up to 20%.
- Drove architectural decisions for scalable microservices handling API authentication, real-time analytics, and business logic.
- Researched algorithms to understand publisher-side mobile app invalid traffic patterns.
- Championed the adoption of project documentation to ensure solutions were well-laid out and minimized back and forth between product and tech.
- Acted as the engineering point of contact for key go-to-market initiatives, aligning engineering timelines with product and business goals.
- Conducted regular one-on-ones, performance reviews, and growth plans aligned with organizational goals and individual career aspirations.
- Established Android development best practices, including CI/CD pipelines, SDK modularization, and code style.
- Participated in agile execution rituals, improving sprint velocity and delivery predictability by 50%.
Mobile Team Lead
MonetizeMore
- Served as a foundational engineer building a high-performance in-house Android SDK focused on in-app ad monetization and ad fraud detection.
- Engineered a dynamic ad-serving SDK optimizing ad delivery based on user behavior, device parameters, and real-time user interaction.
- Built a lightweight coroutine-driven analytics library using Kotlin Flow, enabling real-time event tracking.
- Designed an automated app data collection system capturing over 50 unique device-level signals supporting ad fraud detection and behavioral analytics.
- Developed a built-in GDPR-compliant consent management module, reducing external dependency and improving compliance coverage.
- Enhanced SDK performance by approximately 15% through memory profiling and optimizations in dependency injection, network calls, and UI rendering logic.
- Increased test coverage to over 80% by writing and maintaining end-to-end tests using Espresso and unit tests with Robolectric.
- Organized and led internal training sessions, ensuring cross-team alignment on mobile development goals and OKRs.
Mobile App Developer
Tintash
- Worked with a unicorn company integrating regional in-app payment solutions M-PESA and Paymob for expansion in Africa and South America.
- Developed from scratch an Android companion app for a smart BBQ grill.
- Trained junior Android developers on industry best practices.
- Developed a crypto wallet app for a major crypto market player using React Native.
- Maintained the iOS real estate app of a US-based company.
- Developed features for an iOS crime reporting app for a US company.
- Maintained Android app for a US-based real estate company, integrating Stripe for in-app purchases and advanced Google Maps functionality to draw custom geo-fenced areas.
- Architected features for an Android crime reporting app.
- Integrated Firebase and Segment Analytics to track issues and user retention.
- Set up AppsFlyer and Firebase Dynamic Links to create short links for marketing and conversion campaigns.
Experience
In-house Android Ad Monetization and Fraud Detection SDK
Education
Bachelor's Degree in Computer Science
National University of Computer and Emerging Sciences (NUCES FAST) - Islamabad, Pakistan
Skills
Libraries/APIs
Kotlin Flows, Socket.IO, REST APIs, Stripe, Google Maps, React, Node.js
Tools
Git, ExoPlayer, Claude, Claude Code, Apache Maven
Languages
Kotlin, TypeScript, JavaScript, Python, Java, Swift, C++, Go
Frameworks
React Native, Espresso, Robolectric
Paradigms
Dependency Injection, Mobile Development, Microservices, UI Design, Model Context Protocol (MCP)
Platforms
Android, Firebase, Mobile, iOS, Android TV, Databricks, Amazon Web Services (AWS)
Storage
Databases, PostgreSQL, ClickHouse
Other
Advertising Technology (Adtech), Fraud Detection, Software Development, Web Development, Artificial Intelligence (AI), API Integration, In-app Purchase (IAP), In-app Purchases, App Store Acceptance Process, Analytics, Subscription Management, User Experience (UX), Integration, Subscriptions, Push Notifications, Large-scale Projects, Jetpack Compose, APIs, Mobile App Development, RESTFul APIs, Android Development, AI Agents, Distributed Systems, Technical Leadership, Large Language Models (LLMs), Prompt Engineering, Consulting, Training, Vibe Coding, CI/CD Pipelines, Machine Learning, Payments, SDK Development, Full-stack, Performance, Scalability, Security, User Authentication, Real-time Communication (RTC), WebSockets, Media, Streaming, Back-end, Multi-tenant SaaS, Augmented Reality (AR), Computer Vision, Bluetooth Low Energy (BLE)
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