Senior Software Engineer, Backend (Merchant & Partner Lifecycle)

Role overview

What you'll do

• Design and expand platform infrastructure to scale to hundreds of thousands of merchants worldwide.
• Align work with other teams to deliver cross-team projects.
• Mentor engineers to support their growth.
• Partner with the engineering manager and team lead on the team's long-term vision.
• Execute technical strategy for broad, complex, and open-ended requirements.
• Use agentic development tools such as Claude Code to automate parts of the development process.
• Improve engineering standards, tooling, and processes across the organization.

What we look for

• 5+ years of backend software engineering experience.
• Strong understanding of Domain-Driven Design, distributed systems, and architectural effects on performance and maintainability.
• Proficiency with data models, HTTP and RPC API design, state machines, event-driven architecture, and database design.
• Excellent written and verbal communication, including asynchronous technical specifications, ADRs, and project plans.
• Experience designing, developing, and launching backend systems using AWS, gRPC, Snowflake, Kotlin, Python, MySQL, and Kubernetes.
• Java and Kotlin experience are especially helpful.
• Experience with monitoring and alerting systems such as Sentry, Rollbar, Chronosphere, or Kibana.

Remote-first workplace

• Affirm is a remote-first company, and most roles can be performed from almost anywhere within the country of employment.
• Some positions may occasionally require in-person office work, and all new hires are invited to an in-person onboarding experience.

Compensation

• Canadian base pay range is 153,000 to 213,000 per year.
• Compensation may include equity rewards, monthly health, wellness, and technology stipends, and benefits.

Benefits

• Benefits include fully subsidized medical coverage, dental and vision coverage for employees and dependents.
• Additional benefits include spending stipends, flexible time off, holidays, and an employee stock purchase plan.