Affirm
Affirm28d ago

Senior Software Engineer, Backend (Merchant Data Platform EU)

PolandRemote PolandRemotesenior
EngineeringBackend EngineeringData EngineeringSoftware Engineer
1 views0 saves0 applied

Quick Summary

Overview

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.

Technical Tools
EngineeringBackend EngineeringData EngineeringSoftware Engineer

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.

Responsibilities

~1 min read
  • 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.
  • 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.
  • You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews.
  • You have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design. You write high quality code that is easily understood and used by others.
  • You are 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.
  • 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.

What We Offer

~1 min read

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. 

What We Offer

~1 min read
Flexible Spending Wallets for tech, food and lifestyle
Away Days - wellness days to take off work and recharge
Learning & Development programs
Parental benefits
Employee Resource & Community Groups

The majority of our roles can be located anywhere in Poland.

**This job description is not a contractual document, and is not intended to have binding force.**

Affirm is proud to be a remote-first company! The majority of our roles are remote and you can work almost anywhere within the country of employment. Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office. A limited number of roles remain office-based due to the nature of their job responsibilities.

We’re extremely proud to offer competitive benefits that are anchored to our core value of people come first. Some key highlights of our benefits package include: 

  • Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents 
  • Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
  • Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
  • ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount

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.

[For U.S. positions that could be performed in Los Angeles or San Francisco] 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.

By clicking "Submit Application," you acknowledge that you have read Affirm's Global Candidate Privacy Notice and hereby freely and unambiguously give informed consent to the collection, processing, use, and storage of your personal information as described therein.

Listing Details

Posted
March 11, 2026
First seen
March 23, 2026
Last seen
April 8, 2026

Posting Health

Days active
15
Repost count
0
Trust Level
35%
Scored at
April 8, 2026

Signal breakdown

freshnesssource trustcontent trustemployer trustcandidate experience
Affirm
Affirm
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We’re excited to announce that Affirm is now a remote-first company!

Employees
3k+
Founded
2012
View company profile
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AffirmSenior Software Engineer, Backend (Merchant Data Platform EU)