2026 – present
Founder and lead developer
zoocompanyA company building SaaS products for businesses. My products: zoogames (Minecraft server stores), the zooplay.gg network, the Skumasz course platform and Budżet klasowy.
JavaSpring BootNext.js
Jakub Wawrzynowicz. Full-stack developer working in Java, Spring Boot and Next.js. Founder of zoocompany, building software for clients since 2023.
LanguagesJavaTypeScriptPythonSQL
FrameworksNext.jsReactSpring BootHibernateTailwind CSS
DatabasesPostgreSQLMySQLMariaDBRedisFlyway
Cloud and DevOpsAWSGCPDockerKubernetesCI/CDGitHub WorkflowsMaven / Gradle
APIs and securitySwaggerOAuth 2.0 / OIDC
ToolsExcel
Experience
ResumePDFJan 2023 – present
Freelance full-stack developer
Client projectsLody Ciao: a PWA with POS integration and a loyalty programme. Ecommind: an e-book store built single-handedly. GRE-WA: a website and CRM for a construction company. TuneBot: a Discord bot with over 200,000 users.
Spring BootNext.jsPostgreSQL
2025
Software engineering intern
ShipStation (Auctane Poland)Two internships. Developing and optimising the company’s live product in Java and Spring Boot: algorithms, performance, debugging and testing. Before that, a food ordering system in Spring and React.
JavaSpring BootPostgreSQL
2022 – present
Programming technician
CKZiU „Elektronik” nr 2 w Zielonej GórzeAcademic scholarship. Finalist of the PZSWiR technical innovation competition, first place in the regional round.
ScholarshipPZSWiR finalist
Projects
zoocompany · SaaS
zoogames
A SaaS store platform for Minecraft servers: online payments, a plugin that delivers every purchase in-game, and a revenue dashboard.
Spring BootRedisNext.js
zoocompany.xyzzoocompany · game server
zooplay.gg
A Minecraft server network: website, a rank store that needs no account, a creator programme and an admin panel.
Spigot APINext.js
zooplay.ggClient · PWA
Lody Ciao
An ice cream shop app with a loyalty programme and real-time POS integration.
Next.jsPWACI/CD
lodyciao.plClient · e-commerce
Ecommind
An e-book store built single-handedly: watermarked PDFs, sign-in with an emailed code, files on S3.
Spring BootPostgreSQLNext.js
ecommind.plClient · Discord bot
TuneBot
A music bot with over 200,000 users. A rebuilt backend and a live control panel over WebSockets.
ExpressSocket.IOReact
200,000+ usersClient · website and CRM
GRE-WA
A construction company website and a custom CRM: clients and calendar in one place. Designed by suzidesign, built by Qbiter.
Next.jsTailwind CSS
gre-wa.plMy product · e-learning
Skumasz
Online courses for the Polish INF.03 and INF.04 vocational IT exams: video lessons with code, past papers and a timed mock exam.
Next.jsDockerS3
skumasz.plzoocompany · web app
Budżet klasowy
A web app that helps teachers run the class budget: collections and expenses in one place.
Next.jsSupabasePWA
budget.qbiter.xyzTools
Tool
Link shortener
Turns long URLs into short links on link.qbiter.xyz, with custom endings and a history of recent links.
Try it
Tool
Sens Finder
Finds your ideal mouse sensitivity step by step with the PSA method. Works for CS2, Valorant, Apex and Overwatch 2.
Try it