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Principal Python Engineer

Signify Technology — United Kingdom · Posted ~1 day ago

Senior Onsite Visa History ✓

Skills

Python SQL Linux PostgreSQL Snowflake Apache Kafka Apache Airflow Django Flask FastAPI TDD BDD Pair programming Software architecture Technical leadership Mentoring Java

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Summary

A leading financial infrastructure organization is seeking a Principal Python Engineer to join a small, highly skilled team building and expanding data pipeline and event-streaming infrastructure. You will lead complex projects end to end, mentor engineers, collaborate with commercial stakeholders, and uphold rigorous engineering standards including test-driven development, behavior-driven development, pair programming, and maintainable code. Expert Python, advanced SQL, deep Linux knowledge, and experience with modern data and web technologies are required.

Highlights

High-impact principal-level individual contributor role in a highly skilled engineering environment, with strong emphasis on software craftsmanship, technical leadership, mentoring, modern testing practices, and end-to-end ownership. Includes competitive compensation, private healthcare, pension contributions, generous holiday allowance, and daily lunch.

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 knowledge PostgreSQL, Snowflake Apache Kafka, Apache Airflow Django, Flask or FastAPI TDD, BDD, pair programming 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 Private medical including dental, private GP service, life insurance 7% pension contribution, no employee contribution required 25 days holiday rising to 30, complimentary lunch daily 4 days in office, London Note: interviews are starting in 1-2 weeks so worth reaching out now. Send your CV across and we will be in touch.