Qasim Hassan.
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Qasim Hassan

Senior Full-Stack Engineer

Lahore, Pakistan · Open to remote · qhassan1214@gmail.com · qasimhassan.dev · LinkedIn · GitHub

Summary

Senior Full-Stack Engineer with 6+ years shipping React Native, Next.js, and AI products to production. Owned mobile/web clients, payments, and store releases for live apps with 10K+ Play installs. Top Rated Plus on Upwork (100% Job Success). Open to senior remote roles and high-value freelance.

Skills

  • Languages: TypeScript, JavaScript, Python
  • Mobile: React Native, Expo, EAS Updates, App Store / Play Store release
  • Frontend: Next.js, React, Tailwind CSS, TanStack Query, Redux, Zustand
  • Backend: Node.js, FastAPI, REST APIs, GraphQL, WebRTC, Socket.io
  • AI / ML: OpenAI API, Claude API, AWS Bedrock, YOLO11, SAM2, DINOv2
  • Cloud & Data: Firebase, Supabase, PostgreSQL, MongoDB, AWS, Vercel
  • Payments: Stripe, RevenueCat, In-App Purchases
  • Practices: System design, Code review, Mentorship, CI/CD, Offline-first mobile

Experience

  • Senior Full-Stack Engineer · StarComputer Labs

    May 2025 – Present

    Remote · US-based company · Full-Time Contract

    • Own Expo/React Native and React web clients plus RevenueCat/Stripe entitlements for Agenticly, an AI markets research product live on Play Store (10K+ downloads, 4.9★), App Store, and web.
    • Took full product ownership of Kitty Nip (geo social, chat, IAP, Firebase) — live on Play Store and App Store with 10K+ Play downloads.
    • Ship AI product surfaces end-to-end (CatChat and related clients) against Firebase/cloud backends with US stakeholders on architecture and release trade-offs.
    • Operate across mobile, web, payments, and third-party integrations from design handoff through store release on multiple concurrent products.

  • Founder & Lead Engineer · Jafrix System

    2019 – Present

    Lahore, Pakistan · Founder

    • Built and published Innerverse solo (React Native, Expo, Skia, OpenAI, RevenueCat) — live on Play Store and web.
    • Delivered BugMapper frontend for agri-tech field ops (offline sync, trap workflows, advisor charts) used in live greenhouse deployments.
    • Building Dealflow AI and Decidr as AI SaaS products (Next.js, Expo, Supabase, Stripe, LLM APIs).
    • Own full delivery loop for studio work: scoping, architecture, implementation, payments, and release.

  • Senior Software Engineer & Tech Lead · Stackup Solutions

    Feb 2021 – May 2025

    Lahore, Pakistan · Remote clients · Full-Time

    • Led frontend/mobile engineering across client products; owned codebases from architecture through store releases.
    • Delivered Qubio Ecosystem over an 18-month engagement — React Native, Next.js admin, and D3 analytics for an international QR/NFC identity deployment.
    • Shipped Meet & Greet (1:1 and group WebRTC calling on React Native) tuned for mid-tier devices and weak networks.
    • Built BSchedule — paired staff/customer React Native apps on one Laravel scheduling and payments API.
    • Mentored junior engineers, ran technical interviews, and set team standards for architecture and code review.

  • Top Rated Plus Freelancer · Upwork

    2019 – 2025

    Remote · US, EU, APAC clients · Freelance

    • Maintained 100% Job Success as Top Rated Plus across mobile, web, and AI engagements ($70K+ earned).
    • Delivered production apps for US/EU/APAC clients; one multi-year relationship converted to full-time at StarComputer Labs.
    • Repeatedly owned end-to-end delivery: product UI, integrations, payments, and store submissions.

Selected Projects

  • Agenticly

    Frontend + payments for AI crypto/markets research — Expo & React clients, RevenueCat + Stripe; 10K+ Play downloads, 4.9★, App Store + web live.

    React Native, Expo, React, Firebase, RevenueCat, Stripe

  • Kitty Nip

    Full product ownership of live geo-social app (profiles, chat, IAP, Firebase) — 10K+ Play downloads, iOS + Android.

    React Native, Firebase, Redux, IAP

  • Qubio Ecosystem

    18-month international engagement — React Native, Next.js admin, D3 analytics for QR/NFC digital identity.

    React Native, Next.js, D3.js, Node.js

  • Innerverse

    Solo-founded mood journal with Skia cosmos UI, AI companion, and RevenueCat premium — live on Play Store + web.

    React Native, Expo, Skia, OpenAI API, RevenueCat

  • SafeDeal

    React Native shopping browser frontend for Amazon/eBay/AliExpress insights — 5K+ Play downloads, iOS + Android.

    React Native, Expo, WebView

Education

B.Sc. Computer Science · COMSATS University, Lahore · 2016 – 2020