Backend Software Engineer

Self Financial is a venture-backed, high-growth FinTech company with a mission to increase economic inclusion and financial resilience by empowering people to build credit and build savings. We're looking for people who share our passion and are driven to tackle challenges, find solutions and make the financial space better for the communities we serve. Our team is passionate about challenging the status quo of the credit industry by providing people accessible tools to take control of their credit. Executing on our mission requires deep collaboration across our teams to ensure our products reach the people who can benefit from them the most, particularly the 100 million+ Americans who have no or low credit. Backend Software Engineer Please note: we are only able to consider candidates who are U.S. citizens or current green card holders, and we are not able to provide visa sponsorship of any kind at this time, including for current or future employment. Self Financial is a venture-backed, high-growth FinTech company with a mission to increase economic inclusion and financial resilience by empowering people to build credit and build savings. We’re looking for people who share our passion and are driven to tackle challenges, find solutions and make the financial space better for the communities we serve. Our team is passionate about challenging the status quo of the credit industry by providing people accessible tools to take control of their credit. Executing on our mission requires deep collaboration across our teams to ensure our products reach the people who can benefit from them the most, particularly the 100 million+ Americans who have no or low credit. Software Engineer, Backend - Credit Card Team This role is on our Credit Card team, which builds and supports the systems behind Self’s credit card products. Interviews will be conducted in-person out of our Austin, TX headquarters. About the role As a Software Engineer on Self’s Credit Card team, you’ll help build and maintain the services and APIs that power our credit card experience across Self Financial’s mobile app and web platforms, working alongside a high-performing team of engineers. Much of the team’s work involves integrating with the third-party partners and platforms that our credit card products depend on, so you’ll learn how external systems connect with our own and how to make those integrations reliable and secure. This role is a good fit for someone with a solid foundation in backend development who wants to grow their skills, take on more ownership over time, and learn from experienced engineers. You’ll contribute to backend services and APIs, build your understanding of distributed systems and scalability, and ship high-quality software in a fast-paced, collaborative environment with frequent releases. We care deeply about creativity, quality, learning, and delivering reliable, secure systems to a large customer base. What you’ll do • Build and maintain backend services and APIs using Python, Flask, and FastAPI, taking on more ownership of your area of the system as you grow. • Implement REST endpoints consumed by web and mobile clients, learning to design for scalability and long-term maintainability. • Work with relational databases (PostgreSQL/MySQL) to model data, write efficient queries, and contribute to schema and indexing decisions. • Build and support integrations with third-party partners and services, including handling data exchange, error cases, and monitoring to keep them running smoothly. • Write clean, maintainable code, take part in code reviews, and use reviewer feedback to improve your work. • Follow and help uphold the team’s best practices for testing, security, performance, and safe releases. • Collaborate with Prod