Alexander Kjeldaas
Chief Technology Architect at astor.ai
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolAlexander Kjeldaas is a seasoned software architect and founder based in Stockholm with 13 years of post-graduate industry experience and a career stretching back to senior engineering roles at Fast Search & Transfer and Google. He currently leads architecture at Coinweb.io while founding astor.ai and Formal Privacy, demonstrating a blend of product leadership and deep technical ownership. His expertise spans AI/ML, data engineering, trusted computing, privacy-guaranteed systems, information retrieval and high-performance real-time networked video (including codecs and multiway conferencing). Alexander is comfortable moving from low-level algorithms and systems programming to large-scale distributed architectures, with a track record of turning research-grade ideas into deployable platforms. He brings entrepreneurial grit from multiple startups and a pragmatic security mindset informed by formal privacy work. An understated strength is his cross-domain fluency—applying information retrieval and algorithmic thinking to real-time media and privacy-preserving AI systems.
13 years of coding experience
23 years of employment as a software developer
Norwegian University of Science and Technology
Norwegian, English, Spanish
Stackoverflow
7,103reputation
2.1mreached
30answers
36questions
bitwise-operators
top-1%
parallel-processing
top-5%
terminology
top-5%
bit-manipulation
top-1%
Github Skills (33)
c-language10
concurrent10
bit-manipulation10
bitwise-operators10
thread-safety10
locking10
bitcoin10
bitcoins10
cryptocurrency10
dashjs10
blockchain10
litecoin10
locks10
clangd10
cprogramming-language10
Programming languages (35)
Github contributions (5)
litecoin-project/litecoin
Jun 2025 - Jun 2025
Litecoin source tree
Role in this project:
Backend Developer & Security Engineer
Backend Developer & Security EngineerContributions:1 comment in 1 day
Contributions summary:Alexander contributed to the codebase by introducing thread safety features using clang attributes. They added macros and annotations to the code, specifically in `threadsafety.h`, `sync.h`, and `net.h`, to improve locking and concurrency control. This involved adding annotations to the mutex API and lock-like functions, enhancing the overall robustness and security of the codebase. The user also removed unused functions.
litecoincryptocurrency
alexanderkjeldaas/nixpkgs
Dec 2017 - Nov 2025
Nix Packages collection
Contributions:30 pushes, 6 branches in 8 years
nixosnix-packages
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