Websultanate Software Technologies Pvt Ltd
Website:
websultanate.com
Job details:
We are looking for an experienced Blockchain Developer to join our engineering team and build secure, scalable, production-grade blockchain infrastructure. If you have hands-on experience with cryptocurrency wallets, smart contracts, Web3 integrations, and multi-chain ecosystems, we’d love to hear from you.
What We’re Looking For
- 3+ years of professional blockchain development experience.
Proven experience deploying blockchain applications or smart contracts on mainnet.
- Hands-on experience building production cryptocurrency wallet infrastructure.
- Strong understanding of wallet architecture and blockchain transaction lifecycles.
- Experience with multi-chain and cross-chain applications.
Knowledge of blockchain security, smart contract auditing, DeFi, crypto payments, exchanges, or Web3 gaming platforms.
- Experience with one or more blockchain networks including Ethereum, Polygon, BNB Smart Chain, Base, Arbitrum, Solana, Bitcoin, and Tron.
- Strong understanding of BIP-32, BIP-39, BIP-44, cryptography, digital signatures, and secure key management.
- Backend development experience using Node.js and TypeScript.
Key Responsibilities
- Design, develop, and maintain secure blockchain and Web3 applications.
- Build and integrate custodial, non-custodial, HD, MPC, multisig, and multi-chain wallets.
- Implement wallet creation, seed phrase recovery, transaction signing, broadcasting, gas estimation, and transaction monitoring.
- Develop, test, deploy, verify, and maintain smart contracts using Solidity, Rust, or equivalent technologies.
- Manage the complete blockchain deployment lifecycle from local development → testnet → security testing → mainnet → production monitoring.
- Integrate RPC providers, blockchain nodes, WebSockets, explorers, indexers, WalletConnect, hardware wallets, custody providers, bridges, DEXs, and third-party Web3 APIs.
- Implement blockchain event listeners, balance tracking, transaction monitoring, confirmation handling, nonce management, and chain reorganization handling.
- Design and implement secure key management using KMS, HSM, MPC, multisig, hot/cold wallet architecture, and secrets management.
Job Type: Full Time
Job Location: Lucknow
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