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Senior Software Engineer, Backend (Partner Merchant Interface)

affirmRemote CanadaPosted 28 Oct 2026

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About this role

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. 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 Interfaces - Integration team within Decisions Foundations is growing and we are looking for a Software Engineer.

You will be part of a fast paced team which is responsible for the APIs that Partners and Merchants use to integrate with Affirm, and also power some of our top partners like Amazon and Stripe. What You'll Do · With the support of your team, you will work on tasks that contribute to the team's projects and goals. · You will work collaboratively and proactively with your team and stakeholders, bringing them along for your work and helping to create visibility and dialog regarding the risks and trade-offs related to your work.

· You will strike the right balance of speed and quality in your work, ensuring that we hit our business goals while protecting our systems from downtime. · You will contribute to a sense of community on your team by engaging in growth and development activities. What We Look For · You have previous work or internship experience designing, developing and launching backend systems at scale and are experienced using one of Python or Kotlin.

· You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes. · You have 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. · You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews.

· Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team. [KEEP FOR U.S. ENG ROLES ONLY] · This position requires either equivalent practical experience or a Bachelor’s degree in a related field. [**THE BELOW ARE INSTRUCTIONS FOR RECRUITERS.*** WHEN COPYING INTO WORKDAY, INCLUDE ALL OF THE TEXT BELOW.

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DO NOT DELETE OR FILL OUT ANY OF THE INFORMATION BELOW. ] [DELETE IF NOT APPLICABLE TO ROLE] For U.S. non-variable roles use the template below: Base Pay Grade - Equity Grade - Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include 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.) USA base pay range (CA, WA, NY, NJ, CT) per year: $X - $X USA base pay range (all other U.S.

states) per year: $X - $X [DELETE IF NOT APPLICABLE TO ROLE] For U.S. variable roles use the template below: Base Pay Grade - Equity Grade - Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include 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.) For sales roles, the range provided is the role’s On Target Earnings ("OTE") range, which includes the annual base pay and the sales incentive target.

USA On Target Earnings (CA, WA, NY, NJ, CT) per year: $X - $X USA On Target Earnings (all other U.S. states) per year: $X - $X [DELETE IF NOT APPLICABLE TO ROLE] For CAN/GBR roles use the template below: Base Pay Grade - Equity Grade - Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.

[IF APPLICABLE] For sales roles, the range provided is the role’s On Target Earnings ("OTE") range, which includes the annual base pay and the sales incentive target. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc.

(parent company). (CHOOSE ONE - CAN or GBR) base pay range per year: $X - $X [DELETE IF NOT APPLICABLE TO ROLE] For POL roles use the template below: Compensation & Benefits Base Pay Grade - Equity Grade - Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.

Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: X zł - X zł Additional benefits include: • Type of employment: Contract of Employment • Flexible Spending Wallets for tech, food and lifestyle • Away Days - wellness days to take off work and recharge • Learning & Development

Source listing: greenhouse_affirm

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