Lars Butler
Switzerland, Denmark
Summary
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SeniorLars Butler is a Zurich-based software engineer and board member with 15 years of experience building cloud-native systems, DevOps tooling, and backend services across organizations like AWS and Rackspace. He combines hands-on development with consulting experience, helping enterprises adopt scalable cloud architectures and reliable operational practices. A pragmatic contributor to the popular Werkzeug WSGI library, he improved cookie handling, hardened defaults, and expanded test coverage—showing attention to security, API ergonomics, and long-term maintainability. His career spans roles from embedded and avionics work to large-scale managed cloud platforms, giving him a rare cross-domain perspective on production reliability. Outside day-to-day engineering he has pursued unconventional training (circus acrobatics) and academic study in computer science, suggesting creative problem-solving and physical discipline that inform his leadership.
15 years of coding experience
Github Skills (3)
python10
wsgi9
http8
Programming languages (9)
Github contributions (5)
pallets/werkzeug
Apr 2016 - Apr 2016
The comprehensive WSGI web application library.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 1 PR, 1 issue in 1 day
Contributions summary:Lars primarily focused on improving the `werkzeug` library's functionality related to cookie handling. They corrected the use of keyword arguments, ensuring better code style and preventing potential future bugs. The user also made the `secure` parameter of `set_cookie` a boolean by default and added missing documentation for `secure` and `httponly` parameters, enhancing the library's usability. Furthermore, they added and expanded test cases to cover the different scenarios of `set_cookie` method, increasing test coverage.
pythonweb-appweb-applicationpalletswerkzeug
zerovm/zerocloud
Mar 2014 - Apr 2015
Swift middleware for Zerocloud
Contributions:149 commits, 11 PRs, 4 pushes in 1 year
middlewareswift
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