Senior Software Engineer - Cards

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer - Cards based in the United States. As a Senior Software Engineer, you will help build and scale the card infrastructure that enables businesses to manage their spending reliably and seamlessly. You will contribute across the full stack, from customer-facing card experiences to the backend systems responsible for authorization, settlement, and money movement. Working in a collaborative, product-focused engineering team, you will lead projects from initial design through implementation and launch. You will help maintain highly reliable financial systems where accuracy, observability, and operational excellence are essential. This role offers the opportunity to deepen your expertise in payment systems while shaping innovative debit and credit card products. You will also mentor fellow engineers and work closely with cross-functional partners to deliver meaningful improvements for customers. Accountabilities: In this role, you will take ownership of complex engineering projects, contribute to the evolution of card products, and ensure the reliability of critical financial infrastructure. Your main responsibilities will include: - Lead engineering projects from initial concept and technical specification through implementation, testing, and launch, collaborating with product managers, engineering managers, technical leads, and teammates. - Develop a strong understanding of card payment processes, including authorization, clearing, settlement, and dispute management, and apply this knowledge to technical decisions. - Build and improve full-stack features spanning customer-facing card experiences and backend systems responsible for financial transactions and money movement. - Maintain operational excellence across critical systems by improving reliability, observability, monitoring, and incident prevention. - Contribute to the architecture and evolution of systems that support card issuance, physical card delivery, spending controls, card lifecycle management, settlement, and reporting.

- Mentor other engineers and strengthen engineering quality through design discussions, code reviews, technical guidance, and collaborative problem-solving. - Partner with teams across product, design, operations, risk, compliance, sales, and other functions to deliver cohesive solutions. - Balance the development of new features with the ongoing maintenance, accuracy, and reliability of existing functionality. Requirements: The ideal candidate brings strong full-stack engineering expertise, sound architectural judgment, and a product-oriented mindset. You should be comfortable working on complex systems where technical decisions have direct implications for customer experience and financial accuracy. Key qualifications include: - Extensive full-stack software engineering experience, with the ability to work across frontend and backend systems. - A strong product mindset, systems-thinking capabilities, and a proven ability to deliver projects from planning through production. - Experience making architectural decisions for complex systems and clearly explaining technical reasoning, trade-offs, and long-term implications. - A strong focus on delivering customer value while maintaining the stability, performance, and reliability of existing features. - Attention to detail and a commitment to correctness in systems where failures can have significant financial consequences. - Clear communication skills, comfort navigating ambiguity, and a collaborative approach to working across teams. - Experience mentoring engineers and contributing to technical standards, design reviews, and code quality. - Familiarity with Haskell and TypeScript, or a willingness and ability to learn these technologies.