Allex Veldman
Backend Python Developer at ChainStock
Eindhoven, North Brabant, Netherlands
Summary
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Rockstar🎓
Top SchoolAllex Veldman is a Backend Python Developer with a decade of experience designing and building resilient server-side systems, currently shaping backend architecture and infrastructure at ChainStock. He specializes in Python/Django, GraphQL, Celery and Kubernetes, and has a hands-on approach to production-grade reliability and scalability. An active open-source contributor, he improved chord synchronization in the widely used django-celery-results backend by converting in-memory logic to robust database-backed counters. Trained in electrical engineering and with an early background in theater technology, he combines systems thinking with pragmatic engineering and an appreciation for operational detail. Based in Eindhoven, he focuses on turning complex asynchronous workflows into dependable, maintainable services.
10 years of coding experience
Bachelor’s Degree, Electrical and Electronics Engineering, Bachelor’s Degree, Electrical and Electronics Engineering at Saxion Hogeschool Enschedeinspicient/ theatertechnicus, Theater techniek, inspicient/ theatertechnicus, Theater techniek at Deltion College
Github Skills (8)
celery10
pytest10
python10
django10
testing10
database-design9
postgresql8
json7
Programming languages (12)
Github contributions (5)
celery/django-celery-results
Oct 2020 - Jun 2021
Celery result back end with django
Role in this project:
Back-end Developer
Back-end DeveloperContributions:42 reviews, 10 commits, 8 PRs in 8 months
Contributions summary:Allex primarily contributed to the back-end functionality of the `django-celery-results` project. They implemented and refactored chord synchronization logic, transitioning it to database-backed counters for enhanced reliability. Their work involved modifying database models, integrating with Celery tasks, and ensuring proper handling of chord callbacks and failures. The commits demonstrate a focus on improving the robustness and efficiency of Celery result handling within a Django environment.
pythonredisdjangocelerypython3
chain-stock/suppy
Feb 2022 - Mar 2023
Contributions:1 release, 65 reviews, 82 PRs in 1 year 1 month
supply-chainpythonsimulation
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