Jan Elznic
Freelance Business Software Full Stack Engineer at Jan Elznic - Freelance Software Fullstack Engineer and Independent Consultant
Prague, Prague, Czechia
Summary
👤
Senior🎓
Top SchoolJan Elznic is a versatile Freelance Business Full Stack Engineer and long-time technology leader with 18+ years building high-performance web and mobile applications across frontend, backend and cloud infrastructure. He combines deep hands-on expertise in JavaScript/TypeScript (Angular, React, Node.js), Java, Go and Python with proven experience designing architectures, CI/CD and scalable systems on Azure, AWS and GCP. Jan has led and scaled engineering teams up to ~40 people, restructured tech organizations as CTO/Associate Director, and still enjoys shipping code—recently focusing on LLMs, chatbots, OCR and vector search integrations using Ollama, LangChain.js, LlamaIndex.js, pgvector and Qdrant. Equally comfortable mentoring developers or rolling up his sleeves for platform-level DevOps, he blends product-minded engineering with pragmatic cost and risk optimization learned from crisis-led reorganizations. Based in Prague, he pairs international delivery experience with a habit of teaching workshops and contributing to community projects like XChat.cz, showing a rare balance of leadership, hands-on craft, and community engagement.
13 years of coding experience
18 years of employment as a software developer
Basic, English, German, Basic, English, German at 3. ZŠ RakovníkSecondary, Business Management, Languages, Secondary, Business Management, Languages at ISŠ Jirkov Rakovník
English, German, Czech, slovakia
Stackoverflow
189reputation
19kreached
3answers
2questions
Github Skills (56)
prost8
jak8
vulnerability8
security7
html6
mining6
angular6
svg6
newline6
css6
indentation6
linux6
bash6
ngonchanges6
visual-studio-code6
Programming languages (4)
Github contributions (5)
janelznic/simplyjs
Apr 2014 - Feb 2017
Contributions:11 commits, 16 pushes, 1 comment in 2 years 10 months
janelznic/cheatsheets
Jul 2019 - Oct 2019
Cheatsheets for developers and sysadmins in Markdown - Docker, Git, Linux shell, NPM, PostgreSQL, SVN, WSL
Contributions:21 commits, 2 PRs, 28 pushes in 2 months
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