Senior Backend Engineer — Remote (Python/Kotlin)

Affirm; United Kingdom; Remote; GBP 101,000 - 149,000; Full time

Benefits offered by this job

Health coverage

Tech stipends

Flexible time off

ESPP

Job summary

Affirm is a remote-first company focused on transparent pay and flexible benefits. The Consumer Payments team builds scalable systems enabling billions in transactions while maintaining reliability.

The role emphasizes backend design, APIs at scale, and collaboration with product, design and analytics. The UK remote position offers a base pay range and equity rewards, with visa sponsorship not available.

Qualifications

• 1.5+ years of experience as a software engineer.
• Experience designing, developing and launching backend systems.
• Proficient in Python or Kotlin.
• Familiar with AWS, MySQL and Kubernetes.
• Experience designing, developing and launching APIs at scale.
• Ability to work across multiple software components and write clean, well-tested code.
• Ability to navigate large code bases and contribute to code reviews.
• Strong communication and collaboration skills.

Responsibilities

• Break down projects into tasks and deliver in phases with team.
• Collaborate with product management, design and analytics across lifecycle.
• Support operations and on-call efforts and monitor metrics.
• Contribute to team growth through participation in interviews.

Skills

Backend development

Python

Kotlin

APIs

Distributed systems

Tools

AWS

MySQL

Kubernetes

Job description

Affirm is a remote-first company focused on transparent pay and flexible benefits. The Consumer Payments team builds scalable systems enabling billions in transactions while maintaining reliability.

The role emphasizes backend design, APIs at scale, and collaboration with product, design and analytics. The UK remote position offers a base pay range and equity rewards, with visa sponsorship not available.