Kai Hagelstein
Development Team Lead at SPIEGEL Tech Lab GmbH
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolKai Hagelstein is a Development Team Lead based in Hamburg with 13 years of software engineering experience, recently promoted within SPIEGEL Tech Lab after a decade as a senior developer. He combines hands-on back-end craftsmanship—evidenced by substantive contributions to a Go-based blog engine, improving HTTPS, RSS, admin UX and DB integration—with people leadership and delivery ownership. Kai has navigated roles from freelance engineering to coordinating software testing and video production, giving him a pragmatic, product-focused perspective on engineering trade-offs. Comfortable refactoring legacy code and improving maintainability, he prioritizes reliability and developer ergonomics in production systems. His background in applied media tech and a master’s from the University of Hamburg helps him bridge editorial needs with engineering realities.
13 years of coding experience
13 years of employment as a software developer
Master's Degree, Master's Degree at University of HamburgBachelor's Degree, Bachelor's Degree at Universität Siegen
English, German
Github Skills (10)
go10
back-end-development10
feed9
rss9
sqlite9
html8
admin8
admin-interface8
css6
javascript6
Programming languages (8)
Github contributions (5)
kabukky/journey
Mar 2015 - Oct 2017
A blog engine written in Go, compatible with Ghost themes.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:28 releases, 178 commits, 50 PRs in 2 years 7 months
Contributions summary:Kai made numerous contributions to a blog engine written in Go. Their work involved correcting code, fixing default configuration generation, and removing unreachable code. They also refactored the code to improve readability, added HTTPS redirection, and updated the RSS feeds, demonstrating a focus on core functionality and maintainability. Furthermore, the user enhanced the admin interface and improved the database integration of the blog engine.
golanghugoblog-engineghostghost-themes
kabukky/klaus
Dec 2016 - Aug 2024
Watches a Go source directory for changes. Compiles and runs the binary upon changes.
Contributions:5 PRs, 16 pushes, 1 branch in 7 years 9 months
golangwatchesgogo-sourceruns
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