#652 Sr. Backend Engineers (Card Platform)

BlueCloud is a Snowflake Elite Partner and the 2026 CoCo Catalyst Snowflake Partner of the Year. We help enterprise organizations move from fragmented legacy systems to unified, AI-ready Snowflake platforms — delivering data migration, engineering, governance, BI & analytics, and AI/ML solutions 40–50% faster than traditional approaches. With 450+ Snowflake consultants, 200+ enterprise transformations under our belt, and a 100% Snowflake focus, we combine advisory-led thinking with AI-powered accelerators to turn months of work into weeks of results. Our clients span Financial Services, Healthcare & Life Sciences, Retail, Manufacturing, Energy, and more — and the outcomes speak for themselves: 97% faster reports, 40% fraud reduction, $1.5M in client savings, and 10× client growth. We don't just strategize — we execute. What you'll do ● Write lots of code for backend (either Kotlin or Python) with high degree of standards for quality for Affirm Card product. ● Design system and contribution in implementation. ● Work cross functionally with colleagues in Product, Analytics and other engineering teams across affirm to set and execute our strategy for the Affirm Card. ● Build APIs and data models to work within service oriented and event-driven architectures ● Participate in the various engineering on-call processes that support team growth and efficiency by reducing toil. What we look for ● 6+ years of experience as a backend sr. software engineer in either Python or Kotlin language. ● Strong understanding of any relational database system best practices. ● Strong understanding of distributed systems and how architectural decisions affect performance and maintainability ● Excellent communication skills, both written and verbal. Must be proficient in asynchronous mode of communication–written tech specs, wiki, project plans, etc. ● project management skills–high degree of organization and ability to surface critical information effectively. ● Work with our Product team to extend our core decisioning service; building new risk and fraud mitigation features ● Passion for working with multi-functional teams including Product, Design, Analytics and Business teams. ● Experience with AWS and/or other cloud providers is a plus ● Prior experience with Card related systems is a plus (Marqeta, Stripe, FIS, Card processing, Transaction processing, money movement, ACH etc) What you'll do ● Write lots of code for backend (either Kotlin or Python) with high degree of standards for quality for Affirm Card product. ● Design system and contribution in implementation. ● Work cross functionally with colleagues in Product, Analytics and other engineering teams across affirm to set and execute our strategy for the Affirm Card. ● Build APIs and data models to work within service oriented and event-driven architectures ● Participate in the various engineering on-call processes that support team growth and efficiency by reducing toil. What we look for ● 6+ years of experience as a backend sr. software engineer in either Python or Kotlin language. ● Strong understanding of any relational database system best practices. ● Strong understanding of distributed systems and how architectural decisions affect performance and maintainability ● Excellent communication skills, both written and verbal. Must be proficient in asynchronous mode of communication–written tech specs, wiki, project plans, etc. ● project management skills–high degree of organization and ability to surface critical information effectively. ● Work with our Product team to extend our core decisioning service; building new risk and fraud mitigation features ● Passion for working with multi-functional teams including Product, Design, Analytics and Business teams. ● Experience with AWS and/or other cloud providers is a plus ● Prior experience with Card related systems is a plus (Marqeta, Stripe, FIS, Card processing, Transaction processing, money movement, ACH etc) We are looking for someone who is experienced in building lasting relationships and is passionate about making meaningful contributions to our team. Don't be mistaken, this is a challenging career path but also highly rewarding. Are you up for the challenge? If so, stop reading and start applying.