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Urgent! GammaStack - Blockchain Developer - Backend System Job Opening In Bengaluru – Now Hiring Gammastack

GammaStack Blockchain Developer Backend System



Job description

<p><p><b>Description:</b></p><p><br/>- Lead and own backend development using Node.js and Express.js<br/><br/>- Design, build, and maintain scalable RESTful APIs and microservices architecture<br/><br/>- Write, debug, and optimize complex raw SQL queries for performance and scalability<br/><br/>- Work with PostgreSQL and Sequelize ORM for data modeling and management<br/><br/>- Implement caching solutions using Redis & Integrate real-time features using Socket.io<br/><br/>- Develop and integrate smart contracts (Solidity / Rust)<br/><br/>- Work with blockchain protocols (Ethereum, Polygon, BNB Chain, Solana, etc.) to enable smooth crypto transactions<br/><br/>- Design and implement wallet integrations (MetaMask, WalletConnect, custom/custodian wallets)<br/><br/>- Integrate Web3.js / Ethers.js or similar blockchain libraries into the backend<br/><br/><b>Required Skills:</b></p><p><br/>- 3-5 years of experience as a Backend Developer with at least 2-3 years with blockchain projects<br/><br/>- Expertise in raw SQL queries, indexing, joins, query tuning, and optimization<br/><br/>- Strong proficiency in PostgreSQL and Sequelize ORM<br/><br/>- Hands-on experience with Docker, Redis, and Socket.io<br/><br/>- Familiarity with AWS cloud services (EC2, S3, RDS)<br/><br/>- Strong understanding of backend performance optimization techniques<br/><br/>- Proven leadership or mentoring experience in engineering teams<br/><br/>- Strong proficiency in Solidity (Rust is a plus)<br/><br/>- Experience with Web3.js / Ethers.js or similar blockchain libraries<br/><br/>- Experience with multiple blockchain protocols (Ethereum, Polygon, BNB Chain, Solana, etc.)<br/><br/>- Knowledge of wallet integrations (MetaMask, WalletConnect, custom/custodian wallets)<br/><br/><b>Must-Have Skills:</b></p><p><br/>- Node.js & Express.js backend development<br/><br/>- PostgreSQL (raw SQL, Sequelize ORM)<br/><br/>- Redis caching & Socket.io real-time features<br/><br/>- Solidity smart contracts & major blockchain protocols (Ethereum, Polygon, BNB, Solana)<br/><br/>- Web3.js / Ethers.js & wallet integrations (MetaMask, WalletConnect)<br/><br/>- Docker & basic AWS deployment skills<br/><br/>- Backend performance optimization & team leadership</p><br/></p> (ref:hirist.tech)


Required Skill Profession

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