Costin Eseanu
Principal Software Engineer at Microsoft
Bellevue, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolCostin Eseanu is a Principal Software Engineer based in Bellevue with over 8 years of senior engineering experience across major tech companies, currently leading platform and product work at Microsoft. His career includes senior roles at Google and Facebook and multiple tenures at Microsoft, reflecting deep expertise in large-scale systems, machine learning applications, and cross-company product delivery. Trained in computer science at University POLITEHNICA of Bucharest, he blends enterprise-grade engineering discipline with a history of early-career work in web and application programming across Europe and the US. Colleagues would describe him as a pragmatic architect who moves fluidly between hands-on coding and high-level design, often surfacing practical optimizations that improve reliability and developer productivity.
8 years of coding experience
21 years of employment as a software developer
POLITEHNICA București National University for Science and TechnologyLiceul de Informatica
Github Skills (26)
pytorch10
distributed-training10
python10
mixture-of-experts10
machine-learning10
inference10
data-parallelism10
deepspeed10
deep-learning10
gpu10
compression10
numpy9
large-language-models9
neural-network9
transformer-models9
Programming languages (4)
Github contributions (5)
costin-eseanu/pytorch
Apr 2018 - Sep 2018
Tensors and Dynamic neural networks in Python with strong GPU acceleration
Contributions:16 pushes, 3 branches in 4 months
gpu-accelerationneural-networkpython
costin-eseanu/gastown
Mar 2026 - Apr 2026
Contributions:12 pushes, 8 branches in 7 days
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