Senior Software Engineer, Processing

Lithic is the modern card issuing and processing platform empowering ambitious financial companies to build the future of payments. Our infrastructure powers card programs for 100+ innovative clients, from fintechs reimagining credit and digital banking to platforms transforming disbursements and spend management. Companies like Mercury, Flex, and Novo rely on Lithic’s developer-friendly APIs, direct network connections, and flawless reconciliation to launch and scale card programs in weeks, not years.

We’re building a future where access to better financial products materially improves people’s lives, free from the constraints of 30-year-old mainframes and legacy processors. We’re proud to be backed by world-class investors who share that vision, including Bessemer Venture Partners, Index Ventures, Spark Capital, Stripes, and Mastercard, among others.

What You’ll Do:

• Ensure high reliability, low latency, and correctness for Lithic’s transaction processing interfaces and related services
• Develop new capabilities across authorization, clearing/settlement, disputes, and network integration surfaces
• Ensure that the team is delivering reliable, secure, and scalable code with minimal tech debt
• Evolve the infrastructure supporting physical network peering with card network partners, ensuring connectivity, failover, and capacity meet reliability requirements
• Own initiatives from planning to launch, keeping stakeholders informed and aligned along the way
• Participate in the team on-call rotation
• Lead efforts to improve systems and processes both within the team and across engineering
• Help drive strategic planning in collaboration with the engineering manager and product manager

What You Bring:

• 8+ years experience shipping code in fast-paced production environments
• Advanced distributed system instincts and design skills
• Experience driving large cross-functional projects across engineering, product, and operations teams
• A proven commitment to empathy and inclusion
• Excellent communication skills
• A growth mindset and continuous desire to learn and improve is a must
• An interest in fintech and the payments space is preferred