Software Engineer - Blockchain

Flexsin•Noida Sector 63, India•On-site
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About the Role

Location: Noida Sector 63 | Experience: 4-6 Yrs Job Description: We are looking for a skilled Blockchain Developer with hands-on experience in Solana (Rust + Anchor) and EVM-compatible chains (Ethereum, Polygon, Base, BSC). The ideal candidate should have expertise in smart contract development, cross-chain interoperability, and full-stack dApp development with React and Web3 integrations. You will work on building secure, scalable, and user-centric decentralized applications with seamless wallet and blockchain integrations. Immediate joiners preferred. Responsibilities: - Develop and deploy smart contracts on Solana (Rust + Anchor) and EVM-based networks using Solidity - Build full-stack dApps with React.js/Next.js, Web3.js/Ethers.js, and wallet integrations (MetaMask, Phantom, WalletConnect) - Implement cross-chain features using LayerZero, Wormhole, or Axelar (bridging, syncing, wrapped tokens) - Write secure, gas-optimized contracts and perform thorough testing (Mocha, Jest, Anchor test suite, Hardhat, Foundry) - Integrate backend services with Node.js, GraphQL/REST APIs, PostgreSQL/MongoDB, and Redis (optional) - Automate deployments using Docker and CI tools (GitHub Actions, GitLab CI) - Monitor and troubleshoot on-chain activity using tools like Tenderly, Etherscan APIs, and Solana Explorer - Collaborate with frontend and DevOps teams to ensure great UI/UX and scalable infrastructure Required Skills & Experience: - 3+ years of full-stack development experience. - 1+ year of hands-on Solana smart contract development (Rust + Anchor). - Proficiency in Solidity and EVM tools (Hardhat, Foundry, Truffle). - Strong knowledge of Web3 wallet integration, blockchain architecture, and RPC interactions. - Experience with DeFi, NFTs, DAOs, and decentralized storage (IPFS, Arweave). - Familiarity with authentication protocols like JWT, OAuth2, and SIWE (Sign-In With Ethereum/Solana). - Understanding of smart contract vulnerabilities and Web3 security best practices. - Experience with zk-rollups (zk-SNARKs, zkSync, StarkNet). - Exposure to other chains like Cosmos, NEAR, or React Native/mobile dApps. - Contributions to open-source blockchain projects. - Knowledge of MEV, gas fee estimation, and bridging mechanics across chains.