173K–233K USD / year
Senior Software Engineer, Backend (ML Training and Serving)
BackendRemote — United States
Published on 2026-11-12
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About this role
Build and operate shared infrastructure for training and serving machine learning models across Affirm. The role combines backend engineering, distributed systems, and ML platform work, with ownership of team goals, reliability, and technical standards.
About the company
Affirm offers buy now, pay later financing that lets consumers split purchases into transparent installment payments at checkout. It partners with merchants to provide flexible credit options without late fees.
The team
ML Training & Serving engineering team
Stack
PythonKotlinAWSMySQLKubernetes
What you'll do
- Own quarterly team goals and guide engineers through ambiguous technical problems.
- Collaborate with product, design, and analytics on technical decisions and trade-offs.
- Identify and lead solutions to project, process, technology, and business issues.
- Monitor platform metrics and support availability, on-call, and operational work.
- Improve code review and design standards, and share practices through writing and tech talks.
- Provide feedback and guidance to help develop teammates.
What we're looking for
- 4+ years designing, developing, and launching scalable backend systems.
- Experience building highly available distributed systems.
- Ability to define technical plans and design elegant, extensible system components.
- Able to make significant changes safely in a large codebase.
- Strong written and verbal communication skills.
- Bachelor’s degree in a related field or equivalent practical experience.
Nice to have
- Experience training and deploying models in production.
Benefits
- 100% subsidized medical, dental, and vision premiums for employees and dependents.
- Monthly technology, health, and wellness stipends.
- Flexible time off and generous holiday calendars.
- Employee stock purchase plan with a stock discount.