Jan Jůna
Senior Softwarový Inženýr at Levellr
Prague, Prague, Czechia
Summary
👤
Senior🎓
Top SchoolJan Jůna is a senior full-stack software engineer based in Prague with over a decade of hands-on experience building scalable JavaScript systems and cloud infrastructure. He specializes in Node.js and modern front-end frameworks (Vue/React), relational and NoSQL databases (Postgres, MySQL, MongoDB, Redis), and has led architecture and AWS/Terraform operations as Head of Engineering. Jan has a track record delivering high-throughput systems—most recently architecting a pipeline ingesting ~6k Discord events/sec—and maintaining widely used JavaScript SDKs in a microservices environment. Self-taught from age 15 and holding a Master’s in Computer Science, he blends practical craftsmanship with a strong focus on observability, analytics, and operational reliability. Outside work he channels curiosity into travel, climbing and market investing, traits that mirror his iterative, data-driven approach to engineering.
12 years of coding experience
12 years of employment as a software developer
Master's degree, Počítačové systémy a sítě, 2, Master's degree, Počítačové systémy a sítě, 2 at České vysoké učení technické v Praze
Čeština, English
Stackoverflow
5,020reputation
859kreached
17answers
18questions
recursion
top-5%
settimeout
top-5%
javascript
top-5%
setinterval
top-5%
Github Skills (200)
ecosystem10
api10
nodejs10
windows10
csv10
xlsxwriter10
commercetools10
sphere10
excel-import10
ecommerce10
representations10
javascript10
sdk10
cli10
macos10
Programming languages (11)
Github contributions (5)
commercetools/commercetools-customer-export
Mar 2017 - May 2019
Contributions:2 releases, 4 PRs, 4 pushes in 2 years 2 months
audit-import-export
junajan/market-watch
Sep 2018 - Feb 2023
Market data monitoring tool
Contributions:262 pushes, 1 branch in 4 years 6 months
monitoring-toolmarket-datadata-monitoringmarketmonitoring
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