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Senior Software Engineer, Fullstack; Consumer

Job in Greater London, London, Greater London, EC1A, England, UK
Listing for: Affirm, Inc.
Full Time position
Listed on 2026-01-15
Job specializations:
  • Software Development
    Software Engineer, Backend Developer
Salary/Wage Range or Industry Benchmark: 117000 - 157000 GBP Yearly GBP 117000.00 157000.00 YEAR
Job Description & How to Apply Below
Position: Senior Software Engineer, Fullstack (Consumer Payments)
Location: Greater London

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.

As part of the Consumer Payments team at Affirm, you'll be working on Affirm's Payment Processing Network. These systems currently 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 financial metrics for the business.

What youfll do
  • Partner with product managers and stakeholders across the business to improve and expand our payments platform
  • Develop a deep understanding of payment networks and the payments industry
  • Work with partners and colleagues across the USA and Europe
What we look for
  • 4+ Years of experience as a software engineer
  • Drive to change consumer financial services for the better
  • Fluency in both backend and frontend development
  • Strong cross-team communication and collaboration skills
  • Knowledge of, or willingness to work with, Kotlin as well as Typescript
  • Familiarity with payment processing principles and practices
  • Familiarity with Open Banking standards
  • Experience in technical leadership roles
Compensation

Base Pay Grade - N

Equity Grade - UK 5

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).

GBP base pay range per year: £117,000 - £157,000

Location - Remote England

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Position Requirements
10+ Years work experience
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