Subtain Ali
Full Stack Mobile App Engineer
React Native Developer · 4+ years building production iOS & Android apps
Results-driven Full Stack Mobile Developer with 4+ years of experience building and optimizing high-quality Android and iOS applications. Skilled in TikTok-style short-form video, real-time chat, deep linking, and payment integrations (Stripe, Apple Pay, Google Pay). Strong background in AWS serverless architecture, CI/CD pipelines, and performance optimization.
About Me
A quick look at who I am, where I'm based, and how to reach me.
Subtain Ali
Full Stack Mobile App Engineer
I am a Full Stack Mobile App Engineer with 4+ years of hands-on experience building and shipping cross-platform iOS and Android applications using React Native and TypeScript. My focus is on the parts of mobile development that decide whether an app succeeds in production: performance, reliability, payments, and real-time experiences.
I've led work on TikTok-style short-form video, real-time chat, deep linking, AI integrations, and secure payment flows (Stripe, Apple Pay, Google Pay). On the backend, I work with Node.js and AWS serverless (Lambda, S3, API Gateway, SQS, EventBridge) to support scalable mobile features end-to-end.
My production work spans Fun Social, CazVid, Chex.ai, and MatchRite Care, contributing to 500,000+ combined downloads with a 99.68% Sentry error-free session rate. I care a lot about clean architecture, modular components, and shipping value without churn.
Technical Skills
A comprehensive stack covering mobile, backend, cloud, AI, and payments.
Mobile Development
State Management & Data
Backend & Cloud
Databases
Performance & Reliability
Security & Reliability
Payments & FinTech
Crypto & Blockchain
Real-Time & Streaming
AI Integration
CI/CD & Deployment
Tools & Workflow
Work Experience
Roles where I've built and shipped production mobile applications.
Techling.ai
Full Stack Mobile Application Developer
- Architected and scaled high-performance cross-platform mobile applications focused on video platforms and AI integration.
- Developed CazVid, a cross-platform video-based resume marketplace with media capture, video playback, and real-time chat.
- Built Chex.ai, an AI-driven vehicle inspection platform integrating real-time damage detection APIs.
- Maintained 99.68% Sentry error-free session rate and reduced Google Play crash rate to 0.80%.
- Implemented scalable architecture in TypeScript and established CI/CD pipelines for streamlined releases.
- Managed end-to-end app publishing on Google Play Console and Apple App Store, contributing to 500,000+ downloads.
- Worked on serverless backend using AWS Lambda, S3, and API Gateway to process vehicle inspection data.
- Contributed to core Node.js backend services supporting AI job matching algorithms and video upload pipelines.
Bridge Zone
Mobile App Engineer
- Developed an AI-integrated mobile app for breast cancer detection that analyzes medical images and highlights affected areas.
- Built a ride-sharing app with Google Maps integration for real-time location tracking, route sharing, and nearby ride discovery.
- Implemented payment system using Stripe.
- Deployed the apps on Google Play and the App Store.
Education
Bachelor's Degree in Information Technology · University of the Punjab, Lahore
2018 – 2022
Featured Projects
Production apps spanning video, AI, healthcare, fitness, and fintech.
Chex.AI
AI-driven vehicle inspection platform using smartphone photos. Detects dents, scratches, and defects in real time with 70–80% accuracy.
- Integrated real-time damage detection APIs
- Generated $70k–$100k monthly revenue
- Streamlined inspection workflows for fleet & insurance operators
Fun Social
Dynamic social media platform for creating, sharing, and live streaming short- and long-form videos with real-time filters, stickers, and chat.
- 200K+ downloads
- Real-time filters, stickers, and video editing
- Optimized for smooth playback and low-latency streaming
CazVid – Job & Resume Videos
Cross-platform video-based resume job marketplace built with React Native for iOS and Android. Core features include media capture, video playback, real-time chat, Google/Apple payments, push notifications, and AI resume builder.
- 500K+ downloads on Google Play and App Store
- 99.68% Sentry error-free session rate
- 0.80% Google Play crash rate
- Integrated AI resume builder and real-time chat
TrueTrack for Fitness
Cross-platform fitness management app connecting trainers and athletes for personalized workout planning and tracking with calendar sync across time zones.
- Exercise scheduling and progress tracking
- Cross–time zone meeting scheduling
- Automated reminders to enhance engagement
- CI/CD pipelines for streamlined releases
MatchRite Care
Cross-platform healthcare app that consolidates medical records from multiple EHR systems into a single secure, HIPAA-compliant platform.
- Patient authentication & secure data access
- Real-time health record synchronization
- HIPAA-compliant data handling
Dress Up
Sustainable fashion-sharing app enabling users to rent, lend, and monetize wardrobe items through secure workflows with integrated payments.
- Wardrobe management and dynamic style feeds
- Integrated Stripe payments
- Published on Google Play and App Store
Early Projects & MVPs
Accettazione (MVP)
AI-integrated mobile app for breast cancer detection that analyzes medical images and highlights affected areas with automated report generation.
Capstone Ride Share (MVP)
Ride-sharing app with Google Maps integration for real-time location tracking, route sharing, cost splitting, and nearby ride discovery.
Certifications
Continuous learning across AI, algorithms, and mobile development.
AI Agents and Agentic AI with Python & Generative AI
Vanderbilt University · 2025
OpenAI GPTs: Creating Your Own Custom AI Assistants
Vanderbilt University · 2025
Prompt Engineering for Developers
DeepLearning.AI · 2024
Problem Solving Using Computational Thinking
University of Michigan · 2024
Divide and Conquer, Sorting and Searching, and Randomized Algorithms
Stanford University (Coursera) · 2023
SwiftUI
Coursera · 2022
Get In Touch
I'm open to discussing new opportunities, collaborations, or just talking mobile.
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Contact Information
Connect with Me
Available for Work
I'm currently open to freelance projects and full-time mobile engineering roles.