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Illustration - Senior Software Engineer, Backend (Merchant Data Platform EU)

Senior Software Engineer, Backend (Merchant Data Platform EU)

Affirm
Affirm
Remote Poland
Mar 11, 2026
Salary not listed

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 Merchant Data Platform is a backend, foundational service at Affirm. We are responsible for merchant data and identity across all merchant touchpoints. Our checkout-critical platform serves millions of requests per day, supports the onboarding of merchants across all onboarding touchpoints, and maintains strict availability and latency SLAs given the criticality of the service. Further, the team maintains sophisticated pipelines that enrich our datasets for the purposes of merchant identification, risk analysis, and fraud detection.

We’re looking for a Senior Software Engineer to join our fully remote team based in Europe.

What You'll Do

  • You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery.
  • You will 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.
  • You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them.
  • You will drive detailed project definition, design, cross-functional alignment, estimation, in addition to task break-down, delivery, monitoring, and maintenance.
  • You will 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.
  • You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process.
  • You will mentor engineers on the team to help improve their designs, code quality, and testing.
  • You will own the availability, reliability, and performance of your team’s systems.


What We Look For

  • You have 4+ years of experience as a software engineer with leadership responsibilities and experience mentoring junior engineers.
  • You have experience designing, developing and launching backend systems at scale and are proficient in one of Python or Kotlin
  • You have a track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes.
  • You are expert at synthesizing complex business products, and technical requirements to consistently produce high quality system designs and software.<

Affirm on Oh My Job

228 open positions right now. Average salary across all roles: $66,713–$100,069.

Apply now on Adzuna
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Software Engineer job openings by US stateChoropleth map of Software Engineer job openings across US states, based on active listings in our database. California has the most open positions (961), while Oklahoma has the fewest among states with active listings (1).
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