I build and ship production-ready web and mobile products with clean UX, scalable backends, and real users.

I'm a Full-Stack Developer with 4+ years of experience building and maintaining production web and mobile applications using React, React Native (Expo), Node.js, Firebase, and GCP.

I enjoy building products end-to-end — from frontend UX to backend systems to deployment and production support.

• 📱 Built and shipped mobile apps on the App Store and Google Play
• ⚡ Improved backend performance by ~40% and reduced cloud costs by 50%+
• 🔐 Built secure auth, real-time features, and scalable serverless APIs
• 🛠 Fixed production issues and shipped features with minimal downtime
• 🌍 Supported backend systems handling 10k+ daily requests
• 🧩 Comfortable owning both product-facing UX and backend architecture

Retail point-of-sale and inventory app for managing sales, stock, staff, and store activity from one mobile workflow.
Stack: React Native (Expo), Firebase Auth, Firebase Realtime Database
Focus: sales management, inventory tracking, staff workflows, mobile POS
App Store: https://apps.apple.com/us/app/tillton-pos/id6765776148
Google Play: https://play.google.com/store/apps/details?id=com.flemton.tillton

Offline mobile app built for clinicians, doctors, and health workers in Ghana using the Ghana Standard Treatment Guidelines for diagnosis and prescribing support.
Stack: React Native (Expo), offline-first architecture
Focus: fast symptom-based triage, lightweight UX, guideline-based support
App Store: https://apps.apple.com/us/app/stg-triage/id6760623593
Google Play: https://play.google.com/store/apps/details?id=com.flemton.stgtriage

Mobile exam prep app for UK nurses with analytics and offline study support.
Stack: React Native, Firebase
Focus: exam preparation, progress tracking, offline access
App Store: https://apps.apple.com/us/app/nmc-cbt-practice-pro/id6756345733
Google Play: https://play.google.com/store/apps/details?id=com.flemton.cbt_practice_pro

Competitive paintball ranking platform with real users.
Stack: React Native (Expo), Firebase, GCP
Focus: live production use, engagement, ranking workflows
App Store: https://apps.apple.com/gh/app/hormesis-elite/id6449320338
Google Play: https://play.google.com/store/apps/details?id=com.gallimore.hormesis_elite

• 💼 LinkedIn: https://www.linkedin.com/in/newtongh/
• 📧 Email: oalhassan847@gmail.com
• 📱 WhatsApp: +233554374251

I'm open to Full-Stack, React, and React Native roles — remote or hybrid.
If you're building a product and need someone who can ship and scale, let's talk.