Java Software Engineer (Crypto Focused)

Proven experience in FinTech, Banking, or related financial domains Strong understanding of distributed systems architecture and the client–server model Ability to design and maintain scalable, low-latency, high-performance systems Solid knowledge of concurrency, multithreading, and asynchronous programming Awareness of security best practices Basic understanding of network protocols and troubleshooting Experience working in a product-led fast-paced environment as a team player Strong understanding of blockchain fundamentals Hands-on experience with major chains (e.g., Ethereum, Bitcoin, Solana, Cosmos, Polygon) Deep experience with wallet systems, key management, multisig/threshold signatures, hot/cold wallet architecture, and secure signing pipelines Experience with custody platforms (Fireblocks, BitGo, Ledger Enterprise, Copper) or building custody-grade internal wallet infrastructure Practical experience with staking/validator operations Advanced knowledge of Java Core technologies and the Spring framework Proficiency with SQL databases Advanced understanding and hands-on experience in asynchronous programming methods Understanding of the event driven architecture (Kafka or similar solutions) Understanding and hands-on experience with Ops activities, Kubernetes, pipelines, Fit Flow and modern CI/CD patterns and strategies Ability to effectively use AI technologies in engineering work

Design and build scalable, low-latency, and high-performance backend services Develop distributed and asynchronous systems Optimise performance across JVM, databases, caching, and networking layers Apply security best practices Use event-driven architectures and modern messaging solutions Collaborate with cross-functional teams Maintain high code quality Leverage AI tools to accelerate development, testing, and delivery Design and build backend systems for custody, wallet services, staking, and trading Implement secure key-management and transaction-signing workflows Integrate with blockchain nodes, custody providers, CEX/DEX APIs, and staking protocols Support the integration of third-party staking service providers