153K–213K CAD / year
Senior Software Engineer, Backend (ML Training and Serving)
BackendRemote — Canada
Published on 2026-11-12
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About this role
Build and operate infrastructure that enables machine learning models to be trained and served across Affirm. The role combines distributed systems, ML infrastructure, and platform engineering, with a focus on reliability, developer velocity, and technical ownership.
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 lead delivery of open-ended technical work.
- Collaborate with product, design, and analytics on product decisions and technical trade-offs.
- Identify and lead solutions for project, process, technology, and business issues.
- Monitor platform health, support on-call operations, and maintain service availability.
- Set and improve code review and design standards; share practices through writing and tech talks.
- Provide feedback and guidance to develop teammates.
What we're looking for
- 4+ years designing, developing, and launching backend systems at scale.
- Experience building highly available distributed systems.
- Ability to define technical plans and design simple, extensible system components.
- Strong coding practices and experience making safe changes in large codebases.
- Strong written and verbal communication skills.
Nice to have
- Experience training and deploying machine learning models in production.
Benefits
- 100% subsidized medical, dental, and vision coverage for employees and dependents.
- Monthly technology, health, and wellness stipends.
- Flexible time off and generous holidays.
- Employee stock purchase plan with a discount.