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