Alex Rosenfeld
San Francisco, California, United States
Summary
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SeniorAlex Rosenfeld is an Architect I in R&D with eight years of hands-on experience building full-stack, cloud-native, and AI-driven systems, currently exploring post-quantum cryptography and generative AI at American Express. He combines deep implementation skills across Python, TypeScript, Go and C with production expertise in Django, React, Kubernetes, and AWS to deliver scalable services and RAG/LLM-based solutions. Alex has led large distributed teams and coordinated cross-organizational efforts to integrate cutting-edge models and tooling, while also shipping end-to-end products that include speech-to-text, TTS, and interactive video. His background as a professional orchestral French horn player informs a disciplined, collaborative approach to complex technical problems and rare attention to performance and craft.
8 years of coding experience
Stackoverflow
91reputation
14kreached
1answer
5questions
Github Skills (20)
mozilla-firefox10
redux10
devtools10
firefox10
git-mirror10
mercurial10
javascript9
react9
chrome9
mozilla9
flowtype9
basecamp7
nested6
modulo6
max6
Programming languages (6)
Github contributions (5)
arosenfeld2003/tetris
Sep 2020 - Sep 2025
Contributions:5 pushes, 1 branch in 5 years
arosenfeld2003/arosenfeld2003.github.io
Apr 2019 - May 2026
Contributions:36 PRs, 153 pushes, 18 branches in 7 years 2 months
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