Marcin Wielgoszewski
Staff Security Engineer at CoreWeave
New York City Metropolitan Area United States
Summary
👤
Senior🎓
Top SchoolMarcin Wielgoszewski is a Staff Security Engineer with 15 years of experience designing and hardening infrastructure, software, and networking for high-risk production environments across finance, automotive, and cloud compute sectors. He has held senior roles at Bridgewater, Cruise, Gemini and now CoreWeave, blending hands-on secure engineering with leadership in security architecture and incident-resistant system design. A pragmatic Pythonist and API-focused backend contributor, he has improved tooling used by others in the ecosystem—contributing tests and feature work to well-known projects like github3.py and the HashiCorp Vault client hvac. Colleagues rely on him to refactor complex systems into maintainable, type-safe code and to translate subtle protocol or API inconsistencies into robust implementations. Based in the New York City area with a B.S. in Network Security, he pairs deep technical craft with a track record of shipping measurable security improvements at scale.
16 years of coding experience
16 years of employment as a software developer
B.S. Network Security, B.S. Network Security at University of Advancing Technology
Polish
Github Skills (21)
github10
string-format10
python10
clientside10
hashicorp-vault10
refactor10
api10
github-api10
rest10
string-formatting10
rest-api10
webclient10
refactoring10
pytest9
integration-testing9
Programming languages (9)
Github contributions (5)
etsy/MIDAS
Dec 2013 - Dec 2013
Mac Intrusion Detection Analysis System
Role in this project:
Backend Developer
Backend DeveloperContributions:10 commits in 1 day
Contributions summary:Marcin primarily focused on refactoring and improving the code quality of the `midas` project, a Mac intrusion detection system. They updated the configuration system by changing the config from a class to a dictionary. The user demonstrated proficiency in Python by refactoring the code, improving type checking and data formatting. They also made use of `os.path.join` to construct file paths, indicating attention to code maintainability and best practices.
intrusion-detectionnon-sox
hvac/hvac
Nov 2015 - Nov 2016
:lock: Python 3.X client for HashiCorp Vault
Role in this project:Back-end Developer
Back-end DeveloperContributions:14 commits, 4 PRs, 1 comment in 11 months
Contributions summary:Marcin contributed to the `hvac/hvac` project, a Python client for HashiCorp Vault, by implementing new features and improving existing ones. Their work included adding support for the `gpg_keys` parameter in the rekey process and implementing a `rekey_multi` method, akin to the existing `unseal_multi`. The user also addressed formatting issues, added an integration test for the `rekey_multi` method, and added support for token renewals, thereby increasing the client's functionality and usability.
hashicorp-vaultpythonvaulthashicorpapi
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