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Backend Engineer (Python, SQL)

Wiraa

Salary not specified
Nov 12, 2025
Remote, US
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Affirm is looking to solve the business and technical problem of reinventing credit to make it more honest and friendly by providing flexible, transparent financing options. The Staff Software Engineer, Backend will shape the technical strategy for scalable and reliable backend solutions, manage the full lifecycle of APIs, and collaborate to deliver integrated solutions for enterprise merchants and partners.

Requirements

  • Proficiency in designing, developing, and deploying large-scale backend systems.
  • Expertise in technologies such as Python, Kotlin, AWS, MySQL, and Kubernetes.
  • Experience delivering major features, system components, or deprecating existing functionalities with clear technical planning.
  • Strong coding skills with an emphasis on high-quality, maintainable, and understandable code.
  • Ability to operate comfortably across different levels of system architecture, from low-level idioms to high-level design.
  • Proven track record of gathering and iterating on feedback from cross-functional teams.

Responsibilities

  • Set and execute the technical strategy for your team, aligning it with business goals and long-term vision.
  • Contribute to the entire API lifecycle, including designing, developing, testing, maintaining, and evolving APIs to ensure scalability and reliability.
  • Collaborate with product management, design, and analytics teams to deliver integrated solutions that meet stakeholder needs.
  • Define and advocate for technical solutions and operational processes, acting as a force-multiplier for your team.
  • Ensure operational excellence by implementing monitoring, triage rotations, playbooks, policies, testing, and alerting systems.
  • Foster a culture of quality and ownership by setting coding and design standards, conducting code reviews, and leading technical discussions.
  • Mentor and develop team members by providing constructive feedback and leading by example in technical excellence.

Other

  • 7+ years of experience as a software engineer, with a strong background in backend development.
  • Excellent verbal and written communication skills, supporting effective collaboration with global teams.
  • Either a Bachelor's degree in a related field or equivalent practical experience.