Open to opportunities

Harsh Singh

@harshsingh11

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Senior Full Stack & Blockchain Developer delivering scalable dApps, cross-chain bridges, and NFT platforms.

India

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What I'm looking for

I seek roles building secure, scalable blockchain systems and dApps with opportunities for cross-chain work, performance optimization, and team collaboration.

I am a results-driven Full Stack and Blockchain Developer with 4+ years building scalable web platforms and production-grade decentralized applications. I specialize in React, Node.js, Nest.js, Solidity, and cross-chain solutions, and have delivered ICO platforms, arbitrage systems, NFT marketplaces, and gaming contract systems.

I focus on clean architecture, security, and performance—reducing trade execution latency, engineering hybrid ICO platforms, and building cross-chain bridges. I collaborate effectively in fast-paced global teams and thrive in MNC environments that demand scalable, secure solutions.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

THcoders

Nov 2024 - Present (1 year 3 months)

Engineered a hybrid ICO platform supporting Ethereum and Polygon and designed an ERP & HRM system, implementing secure backend services and scalable frontend interfaces.

Solidity Ethereum Polygon REST APIs

Software Engineer L2

Talentelgia Technologies

Feb 2024 - Nov 2024 (9 months)

Developed a cross-chain crypto bridge using Solidity and Foundry and built reusable React components with Ethers.js integration, improving transaction handling and reliability.

Solidity Foundry Cross Chain Bridges React Smart Contracts Web3.js

Full Stack Blockchain Developer

Debut Infotech

Oct 2022 - Dec 2023 (1 year 2 months)

Led development of a gaming smart contract system using the Diamond Proxy Pattern and built a blockchain arbitrage platform, reducing trade execution latency by 18%.

Diamond Proxy Pattern Solidity MongoDB WebSockets Performance Tuning

Frontend & Smart Contract Developer

Paradise TechSoft Solutions

Aug 2021 - Oct 2022 (1 year 2 months)

Developed NFT marketplaces with auction and bundling features, integrated MetaMask wallet flows, and created Express.js backend APIs for blockchain applications.

NFT Marketplace MetaMask Solidity REST APIs Web3.js JavaScript