Staff Software Engineer, Crypto

Who We Are

Cross River builds the infrastructure behind the world’s most innovative financial products. Our technology and capital solutions power payments, cards, lending, and digital asset capabilities that move money safely, instantly, and inclusively — trusted by leading fintechs, enterprises, and disruptors across the globe.

Our mission is simple: to build the financial infrastructure that expands access and opportunity for all. Guided by a culture of collaboration, curiosity, and purpose, Cross River has been named one of American Banker’s Best Places to Work in Fintech year after year. Whether you’re designing code, solving regulatory puzzles, or developing strategy, you’ll join a team where innovation and integrity drive everything we do — and where your work helps shape the future of finance.

What We're Looking For

We are seeking a highly experienced Staff Software Engineer to join our team and help lead the design, development, and scaling of our cryptocurrency and blockchain-focused platforms. As a Staff Engineer, you will serve as a technical leader, driving architecture decisions, mentoring engineers, and delivering robust, secure, and high-performance solutions in the crypto space. The ideal candidate brings expertise in designing and implementing enterprise-grade software solutions, with a strong foundation in distributed systems, SOLID principles and modern software design patterns.

Responsibilities

• Provide technical leadership: define and drive the technical vision and architecture for crypto-related products, services, and infrastructure
• Design, develop, and deliver scalable, secure and performant software components
• Provide technical mentorship and guidance to senior and mid-level engineers; conduct code reviews and promote engineering best practices
• Stay at the forefront of blockchain protocols, DeFi, tokenization standards, and crypto industry trends; evaluate and recommend emerging technologies
• Drive system reliability, incident response, and operational excellence across crypto platform services

Qualifications

• 5+ years of experience with blockchain technologies, cryptocurrency protocols, or digital asset platforms
• 10+ years of experience developing enterprise systems in C#
• 10+ years of experience with SQL, preferably PostgreSQL or SQL Server
• Deep understanding of blockchain fundamentals — consensus mechanisms, smart contracts, wallet management, key custody, transaction signing, and on-chain/off-chain data flows
• Experience integrating with major blockchain networks (e.g., Bitcoin, Ethereum, Solana, or similar)
• Solid grasp of cryptographic principles — hashing, encryption, digital signatures, HSMs, and key management
• Strong communication skills
• Cloud Architecture - preferably AWS
• Docker / Containers
• Experience designing and developing distributed systems and event driven architecture is a plus. Ideally with understanding or exposure to: MassTransit or NServiceBus, RabbitMQ, Idempotency