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Senior Software Engineer, Backend (Card Loan Platform)

Affirm· Consumer Engineering
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Remote$195k - $255kFull-timePosted 2w ago

About the role

Senior backend engineer role focused on the Card Loan Platform, designing and building high-throughput, distributed systems for Affirm’s card products, with emphasis on real-time approvals, origination, and refunds.

Responsibilities

  • Drive technical strategy by leading the planning, prioritization, and execution of projects, ensuring alignment with product, technical, and business goals.
  • Lead the end-to-end system design and development of large-scale, high-availability services. This includes building robust APIs and data models for our micro-service and event-driven architectures.
  • Collaborate across functions with partners in Product, Analytics, Design, Legal, and Accounting to define requirements and execute card loan attribution and lifecycle strategy.
  • Ensure system health and performance by analyzing and troubleshooting complex technical issues, optimizing existing code, and driving solutions that focus on long-term robustness and scalability.
  • Mentor and grow the team by guiding junior engineers, leading technical discussions and design reviews, and championing best practices through code review.

Qualifications

  • 5+ years of experience in software development or engineering, with a deep understanding of system design and architecture.
  • Motivated leader, inspiring team growth and fostering a culture of continuous learning
  • Excellent communicator, adept at sharing complex ideas with diverse audiences.
  • Strong analytical and problem-solving skills, with a creative and solution-oriented mindset.
  • Proficiency in modern programming languages such as Python, Kotlin, or similar.
  • Experience with cloud platforms (AWS, Azure, Google Cloud) and containerization (Docker, Kubernetes).
  • Knowledge of database systems (SQL, NoSQL), web frameworks, and RESTful API development.
  • This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

Skills

Required:Software architecture and system designProgramming languages (Python, Kotlin)Cloud platformsContainerizationDatabases

Benefits

  • Health coverage at no cost: 100% premiums for employees and their dependents.
  • Spending stipends for tech setup and health/wellness options.
  • Flexible time off and generous holiday calendars.
  • Employee stock purchase plan (ESPP) with stock discount.
Last updated Oct 7, 2026. Interested? Apply on the company site.

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