GammaStack - Web3.js Developer

Description :

- Lead and own backend development using Node.js and Express.js

- Design, build, and maintain scalable RESTful APIs and microservices architecture

- Write, debug, and optimize complex raw SQL queries for performance and scalability

- Work with PostgreSQL and Sequelize ORM for data modeling and management

- Implement caching solutions using Redis & Integrate real-time features using Socket.io

- Develop and integrate smart contracts (Solidity / Rust)

- Work with blockchain protocols (Ethereum, Polygon, BNB Chain, Solana, etc.) to enable smooth crypto transactions

- Design and implement wallet integrations (MetaMask, WalletConnect, custom/custodian wallets)

- Integrate Web3.js / Ethers.js or similar blockchain libraries into the backend

Required Skills :

- 3-5 years of experience as a Backend Developer with at least 2-3 years with blockchain projects

- Expertise in raw SQL queries, indexing, joins, query tuning, and optimization

- Strong proficiency in PostgreSQL and Sequelize ORM

- Hands-on experience with Docker, Redis, and Socket.io

- Familiarity with AWS cloud services (EC2, S3, RDS)

- Strong understanding of backend performance optimization techniques

- Proven leadership or mentoring experience in engineering teams

- Strong proficiency in Solidity (Rust is a plus)

- Experience with Web3.js / Ethers.js or similar blockchain libraries

- Experience with multiple blockchain protocols (Ethereum, Polygon, BNB Chain, Solana, etc.)

- Knowledge of wallet integrations (MetaMask, WalletConnect, custom/custodian wallets)

Must-Have Skills :

- Node.js & Express.js backend development

- PostgreSQL (raw SQL, Sequelize ORM)

- Redis caching & Socket.io real-time features

- Solidity smart contracts & major blockchain protocols (Ethereum, Polygon, BNB, Solana)

- Web3.js / Ethers.js & wallet integrations (MetaMask, WalletConnect)

- Docker & basic AWS deployment skills

- Backend performance optimization & team leadership