Thomas Kowalski
Senior Software Engineer at Datadog
Paris, Ile-de-France
Summary
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Rockstar🎓
Top SchoolThomas Kowalski is a Senior Software Engineer based in Paris with a decade of experience building high-performance systems and a particular knack for low-latency challenges. Trained at ENSIIE and Imperial College London (MSc Computing), he combines rigorous academic foundations with hands-on production work across companies like Datadog and SoundHound. His career spans backend systems, modern C++ and performance engineering, with early roots in computer vision and systems internships that sharpened his pragmatic approach to optimization. At Datadog he progressed from software engineer to senior engineer, reflecting impact on observability and telemetry-facing infrastructure. Colleagues would describe him as a performance-focused engineer who enjoys squeezing out milliseconds and translating complex trade-offs into reliable, maintainable code.
11 years of coding experience
6 years of employment as a software developer
MSc Computing - Software Engineering, MSc Computing - Software Engineering at Imperial College LondonEngineering Degree Software Engineering, Engineering Degree Software Engineering at ENSIIE - École Nationale Supérieure d'Informatique pour l'Industrie et l'EntrepriseBaccalaureate Engineering math specialization, Baccalaureate Engineering math specialization at Lycée Pierre LagourgueClasses Préparatoires aux Grandes Écoles Math & physics, Classes Préparatoires aux Grandes Écoles Math & physics at Lycée Blaise Pascal
English, French, Spanish
Stackoverflow
2,085reputation
238kreached
38answers
74questions
Github Skills (89)
programming-language10
python10
security10
profiling10
debugging10
observability10
apm10
datadog10
llvm9
serializer9
sqlite9
greenlet9
jit9
coroutines8
async8
Programming languages (10)
Github contributions (5)
KowalskiThomas/LLVMSQLite
Mar 2020 - Jun 2021
A JIT compiler implemented with MLIR/LLVM for faster query processing in SQLite
Contributions:429 commits, 2 PRs, 1 push in 1 year 3 months
compilerjitllvmsqlitemlir
KowalskiThomas/echion
Aug 2025 - Dec 2025
Near-zero-overhead, in-process CPython frame stack sampler with async support
Contributions:1 review, 26 PRs, 257 pushes in 4 months
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