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Affirm

Staff Software Engineer, Backend (Consumer Payments)

Job Summary

This role involves designing and developing scalable, highly available backend systems, with a focus on payment processing within the financial technology sector. The candidate will collaborate with cross-functional teams to support product development, international expansion, and system enhancements. Responsibilities include setting technical strategies, advocating coding standards, ensuring system reliability, and mentoring team members. The position emphasizes technical excellence, communication, and fostering a culture of quality in a remote-first work environment.

Required Skills

AWS
Distributed Systems
System Design
Backend Development
Automation
Kubernetes
Technical Strategy
MySQL
Code Review
Spark
Payment Systems
Financial Technology
High Availability Systems

Benefits

Health Insurance
Paid Time Off
Dental Insurance
Vision Insurance
Employee Stock Purchase Plan
Flexible Spending Accounts
Remote Work Options

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.

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.

As part of the Consumer Payments team at Affirm, you'll be working on Affirm's Payment Processing Network. These systems process billions of dollars in payments each year and are vital components in Affirm's platform. We are looking for highly motivated software engineers who are passionate about building high throughput, high availability systems that can grow alongside a high growth business.You will be working alongside multiple partner teams across Europe and the US to support feature development, international expansion as well as moving the dial on key metrics that help us ensure Affirm users are able to pay in the way they want, without harming their financial health.

What You'll Do

· You will be responsible for setting technical strategy for your team on a year-long time scale, and help your team tie it together with critical, business-impacting projects.
· You will collaborate across teams in the product development lifecycle by collaborating with product management, design & analytics to ensure technical sustainability, risks and trade-offs are well understood and managed.
· You will act as a force-multiplier for your team through your definition and advocacy of technical solutions and operational processes.
· You take ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, policies, testing and alerting in place to support “keep the lights on” & on-call efforts.
· You will foster a culture of quality and ownership on your team by setting code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.
· You will help develop talent on your team by providing feedback and guidance, and leading by example.


What We Look For

· You have 8+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin.
· You have an extensive track record of developing highly available distributed systems using technologies like AWS, MySQL, Spark and Kubernetes.
· Knowledge of Payment systems and experience working in the financial technology industry
· You have experience delivering major features, system components or deprecating existing functionality in a system through the definition of a technical and execution plan. You write high quality code that is easily understood and used by others.
· You thrive in ambiguity, and are comfortable moving from low level language idioms all the way to the architecture of large systems to understand how they work.
· Your growth and impact trajectory demonstrates that you have mastered gathering and iterating on feedback from your engineering and cross-functional peers.
· You have strong verbal and written communication skills that support effective collaboration with our global engineering team.


Pay Grade - P
Equity Grade - 7

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).

GBR base pay range per year: £140,000 - £180,000

Location - Remote UK

#LI-Remote

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.

Interested in this job?

Application deadline: Open until filled

Logo of Affirm

Affirm

With Affirm, you can pay over time at your favorite brands. No late fees or compounding interest—just a more responsible way to say yes to the things you love.

See more jobs
Date PostedMay 6th, 2025
Job TypeFull Time
LocationRemote UK
Salary£140,000 - £180,000
Exciting remote opportunity (requires residency in United Kingdom) for a Staff Software Engineer, Backend (Consumer Payments) at Affirm. Offering £140,000 - £180,000 (full time). Explore more remote jobs on FlexHired!

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