Aswin Kumar

Blockchain Developer

Chennai, India

🟢Aping In

Blockchain and Full Stack Developer with experience in Solidity, Ethereum, React.js, Next.js, and Node.js. Built decentralized applications including NFT-based certificate verification and blockchain audio call systems. Delivered production-ready modules at LinkB, owning dashboard and payment gateway integrations end-to-end.

Work Preferences

Salary

USD 1,999

Skills

JavaScript8/10

React.js8/10

Ethereum7/10

Express.js7/10

Firebase7/10

Web3.js (7/10)ERC-721 NFTs (7/10)Tailwind CSS (7/10)Next.js (7/10)Solidity (7/10)Node.js (7/10)MongoDB (6/10)ERC-20 (6/10)Hardhat (6/10)PostgreSQL (6/10)Smart Contract Security (6/10)TypeScript (6/10)IPFS (5/10)GraphQL (5/10)Docker (5/10)

Work Experience

Full Stack Developer

LinkB

Oct 2024 — Nov 2025

Transitioned from intern to full-time after contributing to a parental control application. Took full ownership of the dashboard and payment gateway integration (Razorpay & Chargebee). Built and maintained scalable features using React.js, Next.js, Node.js, Express.js, Firebase, REST APIs, and authentication flows. Improved user experience and system performance by optimizing dashboard workflows and backend logic.

Education

Sathyabama University

BSc · Electronics and Communication Engineering

2022 – 2026

Kola Perumal Chetty Vaishnav Senior Secondary School

Primary & Secondary Education

2007 – 2022