Zbigniewย Romanowski
Principal C Engineer Claude Code Evangelist at Freelancer
Warsaw, Masovian Voivodeship, Poland
Summary
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Top SchoolZbigniew Romanowski is a Principal C++ engineer and Claude Code evangelist with eight years of professional experience building, refactoring, and hardening large-scale C++ codebases across industries from finance to gaming. He blends deep expertise in modern C++ (up to C++26) and toolchainsโclang/clang-tidy, sanitizers, CMake, CI/CDโwith a strong background in operations research and MILP modeling used to solve vehicle routing and workforce scheduling problems. His work includes decomposing multimillion-line monoliths into modular libraries, establishing CI pipelines, and applying static and runtime analysis to raise code quality and maintainability. Zbigniew also implements mathematical models in AMPL and open-sourced the Yumbo project, demonstrating a rare mix of high-performance numerical research (PhD-level quantum physics) and practical production engineering. As a mentor and knowledge-sharing advocate, he routinely leverages Claude Code for test and code-generation support, accelerating developer productivity. Based in Warsaw, he combines academic rigor with pragmatic engineering to deliver robust, analyzable systems.
8 years of coding experience
4 years of employment as a software developer
PhD in Physics Quantum Physics, PhD in Physics Quantum Physics at Warsaw University of Technology
English
Github Skills (35)
variable-length7
in-memory4
cpp4
analytical3
gdbm3
generator2
key-value2
key-value-database2
database2
cli2
golang2
hash2
command-line-tool2
time-complexity2
embedded2
Programming languages (3)
Github contributions (5)
romz-pl/yumbo
Dec 2024 - Apr 2025
Contributions:682 pushes, 1 branch in 3 months
romz-pl/romzdb
Oct 2017 - Apr 2018
Contributions:10 releases, 157 PRs, 288 pushes in 6 months
golangrecordsvariable-lengthlengthdatabase
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