Aleksandr Efremov
Researcher (Member Of Technical Staff) at OpenAI
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolAleksandr Efremov is a researcher and senior C++ programmer with 11 years of experience building high-performance systems across AI, quant trading, and scientific computing. Based in San Francisco, he has contributed to and led work on state-of-the-art language models at OpenAI (including GPT-5 and the GPT-5.4 nano release) and developed algorithmic research and AI labs at Hudson River Trading. His background spans brain–machine interfaces at Neuralink, automatic differentiation for C++ at CERN, and deep learning systems at Google Brain, blending low-level systems expertise with ML research. He is comfortable shipping production-grade backend and networking code, designing software architectures, and applying game-development techniques to complex problems. Notably, his early work integrated Clad into CERN’s ROOT framework, replacing numerical differentiation in high-performance scientific workflows.
11 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Faculty of Information Technology CTU in PragueMaster's degree, Neural Systems & Computation, Master's degree, Neural Systems & Computation at ETH Zürich
English, Russian, Czech
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (41)
dht7
dht-network6
instant-messaging6
tox6
decentralized-applications5
chat-application5
ws5
ncurses4
websocket4
decentralization4
browser-addon4
security4
video-chat4
chat4
endpoints4
Programming languages (3)
Github contributions (5)
ZX-Diablo/UE4SampleChat
Nov 2017 - Dec 2017
Contributions:1 release, 34 commits, 1 branch in 1 month
ZX-Diablo/mu-refreshy
May 2015 - Nov 2022
Contributions:97 pushes, 8 branches, 8 tags in 7 years 6 months
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