Senior Software Engineer (Python)

Senior Software Engineer (Python)

Hybrid London (2 days/week)

Up to £100,000 + Benefits

We're hiring a Senior Software Engineer to play a key role in building and scaling a high-impact ad-fraud prevention platform used globally. This is a senior IC role for engineers who enjoy ownership, solving complex problems, and setting a high bar for engineering quality.

What you'll do

Lead delivery of complex, cross-service features

Make pragmatic architecture and design decisions

Own services end-to-end, including performance, reliability, and incident response

Set standards for testing, observability, and security

Mentor engineers and contribute to strong team practices

Collaborate closely with Product, Design, and Data teams

What we're looking for

Strong experience as a Senior Software Engineer in modern product teams

Proven ability to design and deliver scalable, reliable systems

Experience operating production services

Strong coding, code review, and technical leadership skills

Comfortable working through ambiguity and influencing technical direction

Why apply?

Salary up to £100,000

Hybrid working - 2 days per week in the London office

High ownership, high-impact role

Strong engineering culture focused on quality and reliability