Sergei Vychegzhanin
Senior Fullstack Engineer at JAPAN AI株式会社
Greater Tokyo Area Japan
Summary
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Rockstar🎓
Top SchoolSergei Vychegzhanin is a Senior Fullstack Engineer with 12 years' experience building scalable web and real-time systems across Japan and internationally. Currently at JAPAN AI, he delivered a real-time speech-to-text product with synchronous translation that cut end-to-end latency by 40–60×, led a full UI redesign, and migrated storage to a more reliable, queryable architecture while authoring OpenAPI docs to speed partner onboarding. He has a strong frontend pedigree from leadership roles at Cloudaware and Rarible, owning architectures, SDKs, and developer experience, and mentors junior engineers through code review and process ownership. A pragmatic fullstacker, he pairs TypeScript/React expertise with backend work—evidenced by contributions to an improved Node.js RSA library that expanded long-message support and cross-environment key handling. Based in the Greater Tokyo Area, Sergei combines deep implementation skills with product-minded design and a track record of operationalizing complex features for production.
12 years of coding experience
10 years of employment as a software developer
Инженер, Программное обеспечение вычислительной техники, Инженер, Программное обеспечение вычислительной техники at Пермский Государственный Технический Университет (ПГТУ)
Английский, Русский, Японский
Github Skills (7)
javascript10
nodejs10
encryption10
cryptography10
rsa10
decryption10
testing10
Programming languages (5)
Github contributions (5)
rzcoder/node-rsa
Mar 2014 - May 2021
Node.js RSA library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 releases, 199 commits, 43 PRs in 7 years 2 months
Contributions summary:Sergei implemented and improved the Node.js RSA library, focusing on enhancing the long message support and providing improved encrypting and decrypting functionalities. They added unit tests and improved key format handling for broader usability. The user also worked on code refactoring and implemented support for various environments.
rsasigningaesnode-jsjavascript
rzcoder/prow
Jun 2015 - Nov 2016
Contributions:32 commits, 46 pushes, 4 branches in 1 year 5 months
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