Principal Python Engineer (capital markets)

Signify Technology; Greater London; On-site; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Complimentary lunch daily

25 days holiday rising to 30

4 days in office (London)

Job summary

Signify Technology in London is seeking a Principal Python Engineer to lead end-to-end data pipeline and event streaming infrastructure powering Europe’s largest equities exchange.

You will mentor engineers across Europe and the US, emphasize code quality, and collaborate with business development and sales to deliver new products and features. The team values testable, maintainable code, pair programming and TDD.

Qualifications

• Degree in Computer Science or related field preferred.
• Strong Python expertise and proven leadership capabilities.
• Financial markets experience is a strong plus.

Responsibilities

• Lead complex engineering projects end to end.
• Mentor engineers across Europe and the US.
• Promote testable, maintainable code, pair programming and TDD.

Skills

Expert Python

Advanced SQL

Linux expertise

Django

Flask

FastAPI

Java familiarity

Education

Degree in Computer Science or related field

Tools

Django

Flask

FastAPI

Job description

Principal Python Engineer, London, Europe's Largest Equities Exchange

We are working exclusively with one of the world's largest exchange operators on a Principal Python Engineer hire in London. This is a senior individual contributor role within a small, highly skilled engineering team building and expanding the data pipeline and event streaming infrastructure that powers the largest equities exchange in Europe.

The Role

You will lead complex engineering projects end to end, working closely with business development and sales teams to deliver new products and features, and mentoring engineers across Europe and the US. The team takes software craftsmanship seriously — testable, maintainable code, pair programming and TDD are core to how they work.

Expert Python, advanced SQL, deep Linux knowledge

Django, Flask or FastAPI

Java familiarity a plus

What They Are Looking For

Principal or Staff level Python engineer with strong leadership skills

Degree in Computer Science or related field preferred

Financial markets experience a strong plus — market data, order management, algorithmic trading or financial systems integration

Someone who takes genuine pride in code quality and engineering standards

The Package

Competitive salary and incentive compensation

25 days holiday rising to 30, complimentary lunch daily

4 days in office, London