Mobile apps
Cross platform apps with React Native for iOS and Android. From first screen to store listing.
App and web development studio
Ideas in. Working products out.
The Build Sphere turns your idea into a mobile app or website that real people can use. Clean code, honest timelines and a developer who actually replies.
- 5+years building
- iOS, Android, Weball under one roof
- Live appson both app stores
What I build
Websites and web apps
Fast, responsive sites and dashboards with React, TypeScript and modern tooling. SEO ready out of the box.
Backends and APIs
Node, REST APIs, Firebase and AWS. Secure auth, payments, push notifications and the glue in between.
Fixes and upgrades
Already have an app? I take over existing codebases, fix bugs, improve performance and ship new features.
Selected work
POPProbe iOS
Retail execution and field audit app used by brand teams on the ground.
Shop Swiftly Android
Shopping app with smooth browsing, carts and checkout on Android.
POPProbe web Web
Marketing site and web presence for the POPProbe platform.
AttLed Web
Business website built for speed and clarity.
ATC Group Web
Static marketing site in React and TypeScript, deployed on GitHub Pages.
Invoice Generator Web app
Browser based invoice tool with PDF export and cloud storage.
About
I am Rajat Nanavati, a developer based in Ahmedabad, India, with 5+ years of experience across mobile and web. I have shipped apps in healthcare, retail, HR tech and the creator economy, and I work comfortably across React Native, React, TypeScript, Node, Firebase and AWS.
The Build Sphere is how I work with clients directly. No account managers, no handoffs. You talk to the person writing the code. I prefer long term relationships over one off gigs, so I start small, prove it, and grow from there.
Let me amaze you with my work. You won't be disappointed. One opportunity is all I need to showcase my best work!
Let's build something
Tell me what you have in mind. I usually reply within a day.