Josef Zamrzla
Founder & CEO at Freelancer
Prague, Prague, Czechia
Summary
👤
Senior🎓
Top SchoolJosef Zamrzla is a founder and senior full-stack developer with over 20 years of hands-on experience designing and shipping scalable web and distributed systems. He specializes in React, Node.js, PostgreSQL and Elasticsearch, and in recent years has focused on AI-driven applications, building integrations with OpenAI and Anthropic APIs and designing LLM-powered agents and automation. As founder and technical architect of Skilleto.cz he combines product leadership, go-to-market work and core engineering—owning system design, AI features and client partnerships. His freelancing across Europe complements enterprise experience at companies like MONETA and Skype, where he helped architect high-performance, secure online banking and massively sharded services. Known for solving performance and reliability bottlenecks (profiling, memory/GC tuning) and building real-time systems, he blends deep engineering craft with pragmatic business sense. Based in Prague, he often acts as both developer and strategic partner, turning complex requirements into production-ready AI-enhanced solutions.
13 years of coding experience
19 years of employment as a software developer
DiS, Computer systems, DiS, Computer systems at Vyšší odborná škola, Jihlava
Stackoverflow
193reputation
43kreached
3answers
8questions
Github Skills (54)
database8
storage8
transaction8
key-value7
kubernetes7
nodejs7
consensus7
etcd7
draggable7
distributed-systems7
kafka7
psql7
viewer7
raft7
styles7
Programming languages (5)
Github contributions (5)
josefzamrzla/sdic
Feb 2017 - Jun 2020
SDIC: Simple Dependency Injection Container
Contributions:2 PRs, 24 pushes, 3 branches in 3 years 4 months
injectiondependency-injectiondependency-injection-containerinjection-containerioc-container
josefzamrzla/JTSK_Converter
Aug 2013 - Nov 2015
Contributions:14 commits, 4 pushes in 2 years 3 months
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