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# Principal Python Engineer (capital markets)

- **Company:** Europe's Largest Equities Exchange
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Algorithmic Trading, Apache HTTP Server, Software Quality, Linux, Python (Programming Language), Pair Programming, Test-Driven Development (TDD), Sql Optimization, Flask (Web Framework), Information Technology, Apache Kafka, Data Pipelines
- **Published:** June 27, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/x/40162369/

## About the Role

Principal or Staff level Python engineer with strong leadership skillsDegree in Computer Science or related field preferredFinancial markets experience a strong plus - market data, order management, algorithmic trading or financial systems integrationSomeone who takes genuine pride in code quality and engineering standards

## 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.
Tech Stack
Expert Python, advanced SQL, deep Linux knowledgePostgreSQL, SnowflakeApache Kafka, Apache AirflowDjango, Flask or FastAPITDD, BDD, pair programmingJava familiarity a plus
What They Are Looking For


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