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Muzammil Khan
From Pakistan 09:07 PM (GMT-07:00)
$25/hr or $18,000/yr

Active 1 hour ago


Member since Jul 2026

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Lead Full-Stack Engineer

Software Engineer
Available for hire
Years of experience
5+ years
Experience level
Senior
Available for
Full-time
Available from
29 Jul 2026
Download Resume / CV

My story starts in Karachi, where I learned to build systems that couldn't afford to fail. Over 5+ years, I've gone from writing REST APIs at a fintech startup to architecting a ride-sharing platform serving 100K+ concurrent users — where I cut dispatch latency from 540ms to 230ms because every millisecond meant a driver lost or gained. What makes me unique is that I don't just integrate AI — I ship it to production. I built an autonomous cold-calling platform handling ~50 calls/day on Twilio + OpenAI Realtime API, and a RAG-based knowledge assistant my whole company relies on. Most engineers pick backend depth or AI breadth; I've done both, on real traffic, with real consequences. I lead code reviews for a large engineering team, which taught me the skill that matters most: making complex systems simple enough that others can build on them

Employment History

Backend Engineer at LaunchBox Pakistan 2024 - 2024
Built a real-time ride-booking system using Kafka, WebSockets, and Firebase — reducing dispatch latency by ~57% (540ms → 230ms) across 100K+ concurrent users. • Optimized API performance and distributed load across AWS (EC2, S3, RDS) servers using Redis caching and query refactoring, achieving 99.9% uptime under peak traffic. • Applied TDD practices across service layers, increasing test coverage and measurably reducing production bug rate
Lead Full Stack Engineer at Snark Labs Current 2024 - Now
Architected scalable full-stack applications using React (TypeScript) and Node.js/NestJS, delivering modular, production-grade features within Agile sprint cycles. • Designed RESTful and GraphQL APIs following Onion Architecture, achieving clean separation of business logic, domain, and infrastructure layers for a highly testable codebase. • Integrated Stripe, Google Pay, Apple Pay, OAuth 2.0 SSO, and Google Meet API — enabling unified payment flows and in-app video conferencing for end users. • Led code reviews and enforced clean architecture practices across a team of 20–30 engineers, reducing technical debt and improving overall system maintainability
Junior Software Engineer at Qist Bazaar 2021 - 2023
Developed secure, scalable RESTful APIs for a high-traffic e-commerce platform serving 10,000+ daily active users, with JWT authentication and role-based access control (RBAC). • Optimized database queries and backend workflows under peak traffic, reducing server resource consumption and operational costs significantly. • Contributed to Flutter mobile apps using Clean Architecture, SOLID principles, and BLoC state management for a maintainable cross-platform codebase

Education

Bachelor of Science in Information Technology at Bahria University 2021 - 2024