Backend Software Engineer II (Python/Kotlin) - Remote UK

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

Benefits offered by this job

Health coverage for you and dependents

Tech stipend

ESPP

Job summary

Affirm is recruiting a software engineer to design, build, and operate backend systems with a focus on scalable APIs. You will collaborate with product, design and data teams, delivering work in well-defined phases while maintaining reliability and high-quality code.

Remote UK-friendly role offering exposure to distributed systems, cloud infrastructure, and a strong emphasis on growth, feedback, and teamwork within a global engineering team.

Qualifications

• 1.5+ years as a software engineer.
• Experience designing, developing and launching backend systems.
• Proficient in Python or Kotlin.
• Familiar with distributed systems and AWS, MySQL, Kubernetes.
• Experience designing, developing and launching APIs at scale.
• Able to take ownership and write clean, well-tested code.
• Strong collaboration and code-review skills.
• Excellent verbal and written communication for global teams.

Responsibilities

• Break down large projects into tasks and deliver in phases.
• Collaborate with product, design and analytics in ideation and decisions.
• Monitor metrics and support keep-the-lights-on activities and on-call efforts.
• Participate in interview processes and team growth activities.

Skills

Software engineer

Backend design

Python

Kotlin

Distributed systems

AWS

MySQL

Kubernetes

APIs at scale

Code reviews

Growth & feedback

Communication

Tools

Docker

Job description

Affirm is recruiting a software engineer to design, build, and operate backend systems with a focus on scalable APIs. You will collaborate with product, design and data teams, delivering work in well-defined phases while maintaining reliability and high-quality code.

Remote UK-friendly role offering exposure to distributed systems, cloud infrastructure, and a strong emphasis on growth, feedback, and teamwork within a global engineering team.