Hey there, I'm Shafayeat Kabir — an independent contractor helping startups and founders build, scale, and ship polished mobile products. Since 2017, I’ve been working remotely with small to mid-size startups, crafting apps that have reached millions of users and generated millions in revenue. 🚀
I specialize in Fullstack Mobile App Development with a focus on:
- 🧠 React Native (Expo & Bare) — 5+ years of experience
- ⚡ Native Modules (Swift / Kotlin) — when custom performance is needed
- ☁️ Backend — NodeJS, Supabase, Express, FastAPI
- 🤖 AI-powered apps — integrating OpenAI & Anthropic APIs
- 🧩 CI/CD & EAS, GraphQL, and complex animations
AI therapy app for OCD patients helping them manage obsession and compulsion through smart, personalized chat exercises.
- Worked as a Fullstack Developer with the co-founder
- Built AI streaming chat (like ChatGPT) using NodeJS, Express, OpenAI, and Anthropic APIs
- Frontend: React Native (Expo) + Supabase backend
- The app has gone viral on TikTok, reaching huge downloads and active users
🔗 Website | App Store | Play Store
Supporting tool for Ubiquiti network admins to easily discover and manage devices — a modern replacement for Ubiquiti’s discontinued Chrome extension.
- Built from scratch using React Native (Bare)
- Created a Turbo Module (Android) for fast network scanning
- The app supports HostiFi, a $10M/year Ubiquiti services company
🔗 Website | App Store | Play Store
A European fintech startup offering expense management, salary-on-demand, AI-powered forecasting, and ERP automation.
- Joined as an early engineer handling all mobile app development
- Built with React Native, GraphQL, and EAS CI/CD
- Implemented complex animations and modern fintech UI
🔗 Website
The companion app for the Skylight digital picture frame — a $75M+ business with 2M+ downloads and no external investors.
- Early-stage contributor on the mobile team
- Features: photo/video upload, captions, remote device sync
🔗 Website | App Store | Play Store
Social media scheduling platform used by thousands of creators and businesses.
- Work closely with the founder on mobile apps, bug fixes, and new features
- Updated legacy apps to the new React Native architecture
- Helped maintain apps contributing to $1M+ annual revenue
🔗 Website
- Road Travellers – Fullstack AWS-powered travel app
- Fit League – Fantasy sports meets personal fitness
- Vome Volunteer – Volunteer management system for Canadian nonprofits
🔗 Website - Dozens of proof-of-concept meditation and breathing apps built for founders testing new product ideas
I love working directly with founders — turning ideas into scalable products that users actually love.
Whether you need a full MVP, help scaling your existing app, or a React Native expert who understands product-market fit — I’m your guy.
- 💼 Reach out: sumithired@gmail.com
- 💬 Ask me about anything — I’m happy to help
- 🌎 Remote contractor, always open to new collaborations
✨ Building polished mobile apps that make an impact. ✨