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sohel hussain

@sohelhussain

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Backend developer building Java systems, including an offline UPI payment network and a Solana prescription platform.

India

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At Saurce, I contributed across the frontend and backend of a live app, delivering 10+ React and TypeScript screens. I added JWT-based API protection and multi-image upload validation, and containerized the full stack with Docker.

For MediVault, I built an Anchor smart contract to store prescription data on Solana testnet and integrated Phantom wallet and web3.js for on-chain access and authentication. The project won a Solana hackathon.

I also built an offline UPI payment system that routes transactions over a Bluetooth gossip mesh, using RSA-OAEP and AES-256-GCM to protect packets. I’m a final-year MCA student at Jain University and have solved 500+ DSA problems in Java.

Experience

Work history, roles, and key accomplishments

Blockchain Developer

MediVault

May 2025 - Jun 2025 (1 month)

Built an Anchor smart contract to store prescription data on-chain on Solana testnet. Integrated Phantom wallet and web3.js for on-chain read/write and user authentication.

Anchor Solana Phantom Web3.js Smart Contracts Blockchain

Software Engineer

Saurce

Mar 2025 - Jun 2025 (3 months)

Delivered 10+ production screens in React and TypeScript, cutting frontend scope delivery time by 40%. Eliminated unauthorized API access via JWT auth and containerized the full stack with Docker.

React TypeScript JWT Axios Docker Docker Compose REST APIs

Backend Developer

Fibon Hack

Oct 2024 - Nov 2024 (1 month)

Built backend APIs for event creation, registration, and live updates in a 36-hour hackathon. Ranked among 100+ teams, winning sponsor awards for product execution and usability.

Backend Development API Development Hackathons