Staff Software Engineer, Crypto

Cross River • Fort Lee, NJ

8h • Hybrid

About The Position

Cross River builds the infrastructure behind the world’s most innovative financial products, powering payments, cards, lending, and digital asset capabilities. Their mission is to build financial infrastructure that expands access and opportunity for all, fostering a culture of collaboration, curiosity, and purpose. They have been recognized as one of American Banker’s Best Places to Work in Fintech. The company is seeking a highly experienced Staff Software Engineer to lead the design, development, and scaling of their cryptocurrency and blockchain-focused platforms. This role involves serving as a technical leader, driving architecture decisions, mentoring engineers, and delivering robust, secure, and high-performance solutions in the crypto space. The ideal candidate should have expertise in designing and implementing enterprise-grade software solutions, with a strong foundation in distributed systems, SOLID principles, and modern software design patterns.

Requirements

• 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

Nice To Haves

• Experience designing and developing distributed systems and event driven architecture is a plus. Ideally with understanding or exposure to: MassTransit or NServiceBus, RabbitMQ, Idempotency

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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed
• Number of Employees: 501-1,000 employees