Guillermo Kardolus
Software Engineer at Treeswift
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolGuillermo Kardolus is a software engineer with 10 years of experience building scalable backend systems and platform tooling across cloud-native and high-throughput environments. Trained as an astrophysicist (MSc Astronomy & Astrophysics), he brings a rigorous, data-driven approach to engineering problems and has applied it to identity and access management, Kubernetes operators, and CI/CD automation. He has driven production services at Cloudera and Spotify, built blockchain indexing and reporting systems at Bison Trails, and contributed to Cloud Foundry buildpacks—adding extension support and improving test robustness. Known for reducing fragmentation and improving developer workflows, he created an LLM-driven GitHub bot to summarize build failures and implemented opt-in stronger password policies for customers. Based in New York, he balances technical depth with practical delivery and unusual cross-domain experience spanning distributed systems, security, and infrastructure. Outside work he’s an avid surfer and marathoner, a background that reflects persistence and endurance in long-term engineering projects.
10 years of coding experience
18 years of employment as a software developer
MSc. Astronomy and Astrophysics, MSc. Astronomy and Astrophysics at University of Amsterdam
English, Dutch, Spanish, German
Stackoverflow
173reputation
6kreached
6answers
5questions
Github Skills (16)
testing10
php10
cloud-foundry10
buildpack10
vbnet9
go9
vb69
vbe9
garbage-collection6
atom-editor6
react-native-maps6
javascript6
react-native6
security6
redux6
Programming languages (10)
Github contributions (5)
cloudfoundry/php-buildpack
Nov 2018 - Jul 2019
A Cloud Foundry Buildpack for PHP.
Role in this project:
Backend & QA Engineer
Backend & QA EngineerContributions:20 commits, 3 PRs, 17 pushes in 7 months
Contributions summary:Guillermo contributed to the PHP buildpack, focusing on testing and extension support. They added support for the maxmind extension and addressed compatibility issues with different buildpack configurations (cflinuxfs2/cflinuxfs3). The user also removed older PHP versions from tests and increased timeout values for tests.
buildpackcloud-foundryphpv2b
kardolus/kardol
Jul 2021 - Jul 2026
Contributions:34 pushes, 2 branches in 5 years 1 month
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