Senior Software Engineer, Backend (Reliability Platform)

About the Position

At Affirm, we exist for the moments that matter-giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.

We’re looking for a Senior Software Engineer, Backend (Reliability Platform) to join our remote team in Canada. You’ll design and build a next-generation reliability platform for Affirm’s production systems, blending traditional distributed systems engineering with AI-assisted development.

This is a highly creative, hands-on role for someone who loves “vibe coding” - rapidly iterating, shipping, and refining with strong intuition- while still holding a very high bar for reliability, quality, and maintainability.

Responsibilities

• Own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
• Support peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics.
• Proactively identify project, process, technology, or business issues, advocate for them, and lead in solving them.
• Support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts.
• Foster a culture of quality and ownership on your team by setting or improving code review and design standards.
• Help develop talent on your team by providing feedback and guidance, and leading by example.

Requirements

• 4+ years of experience as a software engineer.
• Experience in designing, developing, and launching backend systems at scale using technologies like Python, Kotlin, AWS, MySQL, and Kubernetes.
• Experience shipping web apps using declarative UI frameworks like React or Vue.
• Practical use of LLMs or AI frameworks to enhance automation and guidance with guardrails and citations.
• Experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple, and extensible design.
• Proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely.
• Strong verbal and written communication skills that support effective collaboration with our global engineering team.
• Either equivalent practical experience or a Bachelor’s degree in a related field.

We Offer

• Competitive salary: CAD $153,000 - $213,000 per year.
• Equity rewards: Offered by Affirm Holdings, Inc. (parent company).
• Health coverage: 100% subsidized medical coverage, dental, and vision for you and your dependents.
• Spending stipends: Monthly stipends for health, wellness, and tech spending.
• Flexible time off: Generous holiday calendars and flexible time off.
• Employee stock purchase plan (ESPP): Own a piece of what you build.

About the Company

Affirm is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an Affirm office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience.

Our benefits reflect our commitment to care, transparency, and flexibility. Here are a few highlights:

• Health coverage at no cost: We cover 100% of premiums for employees and their dependents.
• Spending stipends: Monthly stipends support your tech setup, and the ability to choose health and wellness options that are right for you.
• Time off to recharge: Flexible time off and generous holiday calendars help you rest when you need to.
• Own a piece of what you build: Our employee stock purchase plan (ESPP) lets you buy Affirm stock at a discount.

We’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities. If you need support, we’re happy to help.

For positions based in San Francisco or Los Angeles: Affirm considers qualified applicants with arrest and conviction records, as required by law.

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