> Markdown version of [/jobs/ext/1166263-principal-python-engineer](https://www.wearedevelopers.com/jobs/ext/1166263-principal-python-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Principal Python Engineer

- **Company:** Signify Technology
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Java (Programming Language), Airflow, Linux, Django Web Framework, Python (Programming Language), PostgreSQL, Pair Programming, Test-Driven Development (TDD), Sql Optimization, Flask (Web Framework), Snowflake, Fastapi, Information Technology, Apache Kafka
- **Published:** July 3, 2026
- **Apply:** https://find.jobs/jobs-near-me/apply/ats-redirect/?id=2854474792-2

## About the Role

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

## Description

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.


## Related Videos

- [From Messy Queries to Scalable Systems - How Data Engineering actually works](https://www.wearedevelopers.com/videos/100203-from-messy-queries-to-scalable-systems-how-data-engineering-actually-works)
- [Intro to FastAPI](https://www.wearedevelopers.com/videos/462-intro-to-fastapi)
- [Python-Based Data Streaming Pipelines Within Minutes](https://www.wearedevelopers.com/videos/1233-python-based-data-streaming-pipelines-within-minutes)
- [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker)
- [Enjoying SQL data pipelines with dbt](https://www.wearedevelopers.com/videos/823-enjoying-sql-data-pipelines-with-dbt)
- [Enterprise Python: Software That Lives Long And Prosper](https://www.wearedevelopers.com/videos/946-enterprise-python-software-that-lives-long-and-prosper)

## Related Articles

- [The 13 Best Python Libraries for Developers in 2025](https://www.wearedevelopers.com/magazine/371-the-13-best-python-libraries-for-developers-in-2025)
- [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)
- [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers)
- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)