I'm Zubin Choudhary — a full-stack developer focused on building dev tools and smart contract systems for the Ethereum ecosystem.
- Holdem – A cross-platform (Windows + macOS) productivity tool for temporarily holding files while multitasking across apps. Built with Tauri, focused on fast, invisible UX with drag-and-drop workflows and keyboard-first interactions.
I've worked across startups, hackathons, and open source — always with a focus on clean UX and robust smart contract systems:
- FFREED – Founder. Account Abstraction SDK to deploy contracts without worrying about gas fees or key management.
- Stubs – Built ERC721/1155 smart contracts, relayers, and an on-chain token grid UI in React.
- Sublime Finance – Worked on DeFi smart contracts, EIP-712-based identity verification, and frontend optimization.
- Freelance + Open Source – Contributed to cross-chain infra (e.g., PolygonZkEVM bridges), dev tools, and integrations.
- Google Summer of Code (Fedora) – Built GUI-based tools for Fedora (Red Hat) and migrated legacy Python APIs.
- Microsoft Imagine Cup (Asia 2020 Finalist) – FastTag tollways enable commuters to simply walk in, have their face scanned, and have the toll deducted automatically from their wallet..
- Google Summer of Code Alumni – Successfully contributed to Fedora's packaging and tooling.
- Google Code-in Mentor – Guided high-school contributors through their first open source contributions with Fedora; helped them ship production-grade improvements.
- Multiple Hackathons (10+ wins) – Participated in ETHGlobal and university-level hackathons building full-stack Apps.
Always looking to collaborate with teams building serious infra or user-first dApps.
Whether you're hiring or freelancing — email me or DM me on Twitter.