Principal Software Engineer
Hover or tap a row for full statistics (EUR / month on this chart).
Salary analysis
Compared with the selected benchmark ("All roles in London, United Kingdom"), this listing's salary midpoint is about 24% higher. The offer still falls within the benchmark range (€3,789–€15,737). The listed pay band (€10,833–€13,333) is tighter than the benchmark, which suggests lower salary variability. This benchmark is based on 9 comparable listings.
| Market | Lower bound (25th percentile) | Median | Upper bound (75th percentile) |
|---|---|---|---|
| All roles in London, United Kingdom | €3,789/per month | €7,003/per month | €15,737/per month |
| From job ad (Executive) | €10,833/per month | €12,083/per month | €13,333/per month |
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
Job Details
Responsibilities
- Lead complex engineering projects end to end
- Collaborate with business development and sales teams to deliver new products and features
- Mentor engineers across Europe and the US
- Develop testable and maintainable code using TDD, BDD, and pair programming
Requirements
- Principal or Staff level Python engineer with strong leadership skills
- Degree in Computer Science or related field preferred
- Financial markets experience (market data, order management, algorithmic trading or financial systems integration) is a strong plus
- Commitment to code quality and engineering standards
Skills & Technologies
Education Level
Bachelor
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