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Senior Software Engineer, Backend; Merchant Interfaces

Job in Saskatoon, Saskatchewan, S7W, Canada
Listing for: Affirm
Full Time position
Listed on 2026-01-29
Job specializations:
  • Software Development
    Software Engineer, Backend Developer, Cloud Engineer - Software, Full Stack Developer
Salary/Wage Range or Industry Benchmark: 150000 - 200000 CAD Yearly CAD 150000.00 200000.00 YEAR
Job Description & How to Apply Below
Position: Senior Software Engineer, Backend (Merchant Interfaces)
Job Description  Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.
The Partner Merchant Interface (PMI) team builds the APIs and solutions that power Affirm’s integrations with Enterprise Merchants and Partners. We create and manage the APIs and tools that drive checkout and merchant onboarding, and we collaborate with stakeholders to design and build custom end-to-end integrated solutions.
Responsibilities   Break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery of your work.
Support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs.
Contribute to the entire API lifecycle, including designing, developing, testing, maintaining, and evolving our APIs.
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.
Contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process.
Requirements   5+ years of experience as a software engineer.
Experience designing, developing and launching backend systems and are proficient in one of Python or Kotlin.
Familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes.
Mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code.
Comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews.
Strong verbal and written communication skills that support effective collaboration with our global engineering team.
Bachelor’s degree in a related field or equivalent practical experience.

What We Offer   Competitive base pay range per year: $150,000 - $200,000.
Equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents).
Remote-first company with flexible working options.
Generous benefits package, including flexible spending wallets, time off, and employee stock purchase plan.
Equal Employment Opportunity  We believe It’s On Us to provide an inclusive interview experience for all, including people with disabilities. We are happy to provide reasonable accommodations to candidates in need of individualized support during the hiring process. Pursuant to the San Francisco Fair Chance Ordinance and Los Angeles Fair Chance Initiative for Hiring Ordinance, Affirm will consider for employment qualified applicants with arrest and conviction records.

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Position Requirements
10+ Years work experience
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