Klaus Post
Frederiksberg Municipality, Capital Region of Denmark, Denmark
Summary
🤩
Rockstar🎓
Top SchoolKlaus Post is a seasoned backend engineer and performance specialist with 17 years of experience building high-throughput, reliable systems from startups to scale-ups. Based in Denmark, he has led backend teams at Vivino and served as CTO/consultant, focusing on Go-based web services, distributed systems, and developer tooling. Klaus is an active open-source contributor with notable work on performance-critical Go projects such as simdjson-go, Reed-Solomon erasure coding, and core Go packages, as well as tooling for S3 benchmarking and rclone integrations. He combines low-level optimization (assembly and SIMD improvements) with pragmatic system design, and also brings UX-minded product sense from earlier media and e-learning production roles. Colleagues know him for shipping measurable performance gains and for preferring clear, maintainable solutions over clever but brittle hacks. Check his blog and GitHub for a window into his ongoing experimentation and benchmarks.
17 years of coding experience
9 years of employment as a software developer
Bachelor, Humanistic Informatics, Bachelor, Humanistic Informatics at Aalborg UniversityTønder Gymnasium
English, Danish, German
Stackoverflow
168reputation
25kreached
12answers
0questions
Github Skills (97)
lz410
json-parser10
benchmark10
performance-analytics10
realtime10
messaging10
web-application10
windows10
testing10
gunzip10
websocket10
file-operations10
backup10
code-generation10
encoding10
Programming languages (13)
Github contributions (5)
klauspost/pgzip
Oct 2014 - Feb 2022
Go parallel gzip (de)compression
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 releases, 3 reviews, 93 commits in 7 years 5 months
Contributions summary:Klaus primarily contributed to the pgzip project by implementing new features and improving the existing functionality of the gzip compression and decompression library. Their work included adding the UncompressedSize() function to the Writer, adding async decompression, and optimizing the code using sync.Pool. They also focused on documentation and made improvements to error handling within the codebase.
golangparallelcompressionxzgzip
minio/warp
Sep 2019 - Jan 2023
S3 benchmarking tool
Role in this project:Back-end Developer
Back-end DeveloperContributions:3 releases, 81 reviews, 172 commits in 3 years 4 months
Contributions summary:Klaus's contributions primarily involve back-end development within the `minio/warp` repository, an S3 benchmarking tool. They implemented features related to command-line interface (CLI) updates, including the introduction of built-in profilers for performance analysis. The user also added data generators and incorporated support for server-side encryption (SSE) with customer-provided keys. These changes suggest a focus on enhancing the tool's capabilities and security features.
request-statisticss3-benchmarkingbenchmarkingclockscsv-data
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