Christopher Grebs
Principle Software Engineer at Kaiko Systems
Berlin, Germany
Summary
👤
SeniorChristopher Grebs is a Principal Software Engineer based in Berlin with 18 years of experience building and scaling web backends, developer tooling, and secure production systems. He has led teams and technical efforts across startups and large organizations, growing services to 20M daily users and bringing multiple products from prototype to market readiness. Technically fluent in Python/Django, cloud-native stacks, and security, he has contributed to notable open-source projects such as Werkzeug, Mozilla’s addons-server and cryptography, often improving robustness and compatibility. Christopher blends hands-on engineering with product and process leadership—driving GMP-compliant SaaS and hardware-cloud integrations at CLADE while mentoring teams and tightening security practices. Outside work he’s a homeowner, father of two and hobby gardener, a detail that mirrors his pragmatic, long-term approach to engineering and team growth.
18 years of coding experience
15 years of employment as a software developer
Stackoverflow
56reputation
6kreached
3answers
0questions
Github Skills (63)
compatible10
encrypt10
javascript10
docker10
content-security-policy10
werkzeug10
back-end-development10
apidoc10
python10
pytest10
sec10
django10
testing10
jes10
http10
Programming languages (8)
Github contributions (5)
mozilla/django-csp
Apr 2016 - Mar 2020
Content Security Policy for Django.
Role in this project:
Backend Developer
Backend DeveloperContributions:35 commits, 34 PRs, 44 pushes in 3 years 10 months
Contributions summary:Christopher primarily focused on modernizing the Django Content Security Policy (CSP) library. Their contributions included adding Python 3 and PyPy support, migrating from `nose` to `pytest` for testing, and incorporating wheel build support. They also updated the documentation and prepared the project for multiple releases, including Django 1.10, 1.11, and 2.2 compatibility, and dropped support for older Django versions. Furthermore, the user made jinja2 optional, updated dependencies, and fixed a type-o.
policypythondjango-frameworksecurity-policydjango
mozilla/addons-server
Oct 2015 - Apr 2020
🕶 addons.mozilla.org Django app and API 🎉
Role in this project:Back-end Developer
Back-end DeveloperContributions:4 releases, 3303 commits, 3403 PRs in 4 years 6 months
Contributions summary:Christopher primarily focused on the back-end development aspects of the "addons-server" repository, specifically concerning user management and the processing of validation results. They implemented features to manage user data deletion, including anonymization and deletion of associated profile data. Furthermore, they modified API endpoints to better align with the new "sign file" autograph endpoint.
apipythonaddonsdjangomozilla
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