Leonid Sivko
Java Developer at Calaton Systems
Kyiv, Ukraine
Summary
🤩
Rockstar🎓
Top SchoolLeonid Sivko is a Java developer with 9 years of hands-on experience building backend systems and web applications, currently working at Calaton Systems in Kyiv. He has strong Java Core and Java Web expertise and practical experience with Spring, Hibernate, JDBC, Tomcat and PostgreSQL, guided by OOP and SOLID principles. Leonid has contributed to open-source education-focused projects like mate-academy/jv-storage, implementing core storage logic and improving tests and code quality. Beyond development, he mentored students at Mate Academy, conducting code reviews, mock interviews, and curriculum improvements, showing a knack for teaching and technical communication. His background in printing & publishing hints at a multidisciplinary perspective and attention to detail that he applies to software craftsmanship.
9 years of coding experience
3 years of employment as a software developer
Igor Sikorsky Kyiv Polytechnic Institute
Russian, Ukrainian, English
Stackoverflow
59reputation
0reached
1answer
0questions
Github Skills (8)
data-structures10
javas10
object-oriented-programming10
data-structure10
java10
unit-testing8
algorithms7
collections6
Programming languages (3)
Github contributions (5)
mate-academy/jv-storage
Aug 2020 - Nov 2022
Role in this project:
Back-end Developer
Back-end DeveloperContributions:353 reviews, 17 commits, 6 PRs in 2 years 3 months
Contributions summary:Leonid primarily focused on developing the back-end functionality of the `jv-storage` repository. Their contributions involved implementing the core storage logic, including `put()`, `get()`, and `size()` methods, and modifying the underlying `Pair` class. The user refactored the code to fix bugs, improve code clarity, and enhance overall system performance. They also updated the test cases.
Rommelua/internet-shop
Sep 2020 - Oct 2020
Contributions:49 reviews, 24 PRs, 58 pushes in 1 month
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