Leszek Janczewski
Full-stack Developer at SB Software
Lubusz Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolLeszek Janczewski is a seasoned Full-stack Developer with 10 years of experience building Java-based enterprise systems and modern front-ends using Vue.js and Angular. He has delivered high-performance modules and REST APIs for wagering and financial platforms, working with Java EE, Spring Boot, WildFly, JPA/Hibernate, PostgreSQL and Docker. Beyond backend services he frequently implements front-end PWA features and integrates systems end-to-end, bringing practical DevOps awareness and Git-driven workflows. As an entrepreneur who ran robotics and programming classes for youth, he combines engineering rigor with a passion for teaching and mentoring. Based in Lubusz Voivodeship, Poland, he continues to deepen expertise in Java and full-stack web development while bridging legacy enterprise platforms with modern UI stacks.
10 years of coding experience
18 years of employment as a software developer
Full Stack Web Development Certification Computer Software Engineering, Full Stack Web Development Certification Computer Software Engineering at freeCodeCampMaster's degree Information Technology, Master's degree Information Technology at Uniwersytet SzczecińskiJava Web Developer, Java Web Developer at Coders Lab
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (11)
pdf5
spring3
spring-boot3
dispatcher3
java3
react3
medical3
angular2
javascript2
vuejs22
trend1
Programming languages (3)
Github contributions (5)
leszekjanczewski/Warsztaty_3
Sep 2018 - Jul 2022
Contributions:3 PRs, 3 pushes, 1 branch in 3 years 10 months
leszekjanczewski/Warsztaty_5
Nov 2018 - Sep 2024
Contributions:7 PRs, 7 pushes, 1 branch in 5 years 11 months
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