Senior Software Engineer, Backend (Fintech)

TL;DR

Senior Software Engineer, Backend (Kotlin/Python): Building a new lifecycle-orchestrator service to consolidate merchant lifecycle orchestration with an accent on system simplification and modernization. Focus on designing scalable platform backbones, solving complex distributed systems challenges, and automating development processes.

Location: Remote (Must be based in Canada)

Salary: $150,000 - $200,000 CAD per year

Company

Affirm is reinventing credit by providing honest and friendly buy now pay later services without hidden fees or compounding interest.

What you will do

• Design and expand the platform backbone to scale to hundreds of thousands of global merchants.
• Build the brand new lifecycle-orchestrator service to modernize the codebase and improve system availability.
• Lead cross-team projects and align scopes of work with other engineering teams.
• Mentor other engineers and partner with leadership to drive the team's long-term technical vision.
• Execute technical strategies for broad and complex requirements to solve large open-ended problems.
• Utilize agentic development tools like Claude Code to automate parts of the development process.

Requirements

• 5+ years of experience as a backend software engineer.
• Strong understanding of Domain-Driven Design (DDD) and distributed systems.
• Proficiency in API design (HTTP and RPC), state machines, and event-driven architecture.
• Experience with AWS, gRPC, Snowflake, Kotlin, Python, MySQL, and Kubernetes.
• Must be based in Canada.
• Excellent written and verbal communication skills, specifically for asynchronous documentation (tech specs, ADRs).

Nice to have

• Prior experience with monitoring and alerting systems such as Sentry, Rollbar, Chronosphere, or Kibana.

Culture & Benefits

• Remote-first company allowing work from almost anywhere within the country of employment.
• 100% subsidized medical, dental, and vision coverage for employees and their dependents.
• Generous flexible spending wallets for technology, food, lifestyle, and family forming expenses.
• Competitive vacation and holiday schedules.
• Employee Stock Purchase Plan (ESPP) allowing employees to buy shares at a discount.