The Senior Blockchain Engineer will work on a wallet development kit, an open source tool for integrating various cryptocurrency primitives like payments, smart contract applications, L2 into various projects like payments app, AI agent integrations.

Key Responsibilities:

• Design and implement modular non-custodial wallet libraries with support for multiple cryptocurrencies for mobile, web and server using Javascript.
• Develop and integrate wallet modules for various blockchain protocols with focus on security and key management.
• Create reliable payment processing systems that interface directly with blockchain nodes.

• Strong experience building non-custodial cryptocurrency wallets and key management systems
• Deep understanding of blockchain principles like the UTXO model.
• Hands-on experience running and maintaining blockchain nodes (Bitcoin, Ethereum, etc.)
• Deep understanding of P2P networking concepts and distributed systems
• Strong focus on security best practices and cryptographic principles
• Advanced JavaScript/Node.js expertise, including:
• Modern ES6+ features and async programming
• Buffer handling and cryptographic primitives
• WebSocket/REST/RPC API interactions
• Test-driven development practices
• Understanding of Node.js runtime architecture.

Nice to Have

• Experience with hardware wallet integration
• Familiarity with P2P technologies like Bittorrent/DHT/Holepunch
• Knowledge of BIP standards (BIP32, BIP39, BIP44, etc.)
• Familiarity with Layer 2, token, DeFi protocols

This role focuses on building a non-custodial wallet library using Javascript, while maintaining high security standards. The ideal candidate should be passionate about cryptocurrency technology and have a proven track record of developing secure, user-focused wallet solutions.