We're looking for Senior Java Developer who has experience with custodial wallets + chains ( BTC, ETH, SOL, TRX) to join our team

Project is building an internal wallet technology platform for custodial operations across Bitcoin, Ethereum, Solana, and TRON. The platform will unify policy and governance, wallet management, transaction construction and execution, and signing coordination under a single client-owned stack, replacing the current fragmented model of multiple vendor-specific policy engines, wallet registries, and governance frameworks.

Responsibilities:

• Build secure transaction flows for construction, signing coordination, broadcasting, and confirmation monitoring across multiple blockchain networks, ensuring reliability and scalability.
• Implement policy/governance engines for approval workflows, role-based access control, transaction limits, whitelisting, and compliance rules within a unified internal platform.
• Integrate and optimize blockchain node infrastructure, third-party APIs, and monitoring systems to maintain high availability, performance, and operational resilience.