Lithic

...
Headquarters: Remote

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, along with many others.

We're a team of 170+ across 26 states and 7 countries, headquartered in New York City.

We are hiring a Senior Software Engineer for the Product Platform team, which owns the foundational layer of our API that all other Lithic products build on top. The team’s mission is to make Lithic's API the best in fintech — reliable, consistent, and a joy to integrate with. This includes API Gateway, Events Platform, API key management and authorization, audit logging, or API norms and versioning strategy.

What you'll do:

Write reliable, secure, and scalable code for Lithic's product platform with minimal tech debt

Improve the reliability of systems in team’s scope and participate in the team on-call rotation

Own projects from planning to launch, spanning areas like API key management, reliability, audit logging, or search, keeping stakeholders informed and aligned along the way

Lead efforts to improve systems and processes within the team

What you'll bring:

4+ years building production backend systems, ideally including public-facing APIs at scale

Experience in or desire to lea…

...
Headquarters: Remote

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, along with many others.

We're a team of 170+ across 26 states and 7 countries, headquartered in New York City.

Position: Senior Software Engineer, Processing

Location: Remote

We are hiring a Senior Software Engineer for our Processing team to lead Lithic’s next phase of growth.

The Processing team builds and maintains the real-time interfaces between Lithic and external payment networks. Every card authorization, clearing message, and settlement file flows through systems this team owns. The team manages both online and batch transaction flows across Mastercard, Visa, and Amex, along with transaction enrichment, disputes processing, and network compliance. The systems we maintain have strict latency and uptime requirements, because they sit on the critical path for every card transaction. The team also manages the physical network peering with card network partners, so infrastructure and networking expertise are important. The team primarily uses Java, Python, and Kotlin on AWS.

What you'll do:

Ensure high reliability, low latency, and correctness for Lithic's transaction processing interfaces…

...
Headquarters: Remote

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, along with many others.

We're a team of 170+ across 26 states and 7 countries, headquartered in New York City.

We are hiring a Senior Software Engineer for Lithic’s Card Authorization team, which owns the real-time systems that make every card authorization decision correct, reliable, and fast. The team also owns related fraud tooling, including Lithic’s Rules Engine and 3D Secure integration. You’ll own high-impact projects end-to-end, solve distributed-systems problems at scale, and help build the tools customers use to control fraud and payment risk.

What you'll do:

Write reliable, secure, scalable code for Lithic’s real-time authorization and fraud-prevention systems with minimal tech debt

Build customer-facing features, such as rules improvements, velocity controls, 3DS flows, fraud tooling, and transaction monitoring. Own projects from planning to launch.

Improve the reliability of systems in team’s scope and participate in the team on-call rotation

Lead efforts to improve systems and processes within the team

What you'll bring:

4+ years building production backend systems. Full stack …