Sébastien Vercammen
Python Tech Lead at National Bank of Belgium
East Flanders, Belgium
Summary
🤩
Rockstar🎓
Top SchoolSébastien Vercammen is a Python Tech Lead with 10 years of experience building data-driven back ends and tooling, currently leading Python efforts at the National Bank of Belgium. He specializes in modern Python data stacks—DuckDB, Polars, Pandas, PySpark—and orchestration with dagster, plus web APIs via Flask/FastAPI and interactive workflows in Jupyter. His background spans freelance engineering, technical leadership, and founding multiple ventures, giving him strong product instincts and hands-on delivery skills. An active open-source back-end contributor, he improved robustness and performance in projects like RocketMap by hardening webhooks, database handling and multithreading. Based in East Flanders, Belgium, he combines enterprise-grade architecture with a maker’s curiosity rooted in years of self-directed projects and startup work. Notably, his career blends web legacy roots (PHP/Drupal) with modern data engineering practices, enabling pragmatic migrations and incremental modernization.
10 years of coding experience
11 years of employment as a software developer
Bachelor of Applied Computer Science Computer Science specialization Software Development, Bachelor of Applied Computer Science Computer Science specialization Software Development at Erasmushogeschool BrusselInformation Technology, Information Technology at MMI-ParnasLatin & Science, Latin & Science at Sint-Niklaasinstituut AnderlechtBachelor of Applied Science Computer Science, Bachelor of Applied Science Computer Science at Vrije Universiteit BrusselInformation Technology, Information Technology at Sancta Mariainstituut
Dutch, French, English
Stackoverflow
643reputation
26kreached
46answers
0questions
Github Skills (17)
python10
apidoc10
back-end-development10
webhooks10
api10
database-management8
multithreading8
pokemongo7
hash6
salt6
php6
css-selectors6
css6
jquery6
security6
Programming languages (12)
Github contributions (5)
RocketMap/RocketMap
Aug 2016 - Mar 2018
🌏 Live visualization of all the pokemon in your area... and more!
Role in this project:
Back-end Developer
Back-end DeveloperContributions:153 commits, 692 PRs, 471 pushes in 1 year 7 months
Contributions summary:Sébastien primarily contributed to the back-end functionality of the RocketMap project. Their work involved enhancing webhooks by adding data fields, supporting optional data, and ensuring consistent time management using calendar.timegm(). The user also focused on improvements to the database and the back-end code and included optimizations to the handling of API requests. Further contributions focused on improving the webhooks by applying multi-threading and by implementing more robust handling of exceptions, which increased the project's overall robustness.
reactdata-visualizationvisualizationrocketmap
sebastienvercammen/RocketMap
Jan 2017 - Mar 2018
Contributions:537 pushes, 328 branches in 1 year 2 months
reactdata-visualizationvisualization
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