I will fix bugs and develop java spring boot rest API

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Serhii K

About this gig

Welcome to my professional Java & Spring Boot development services!


Looking for a reliable engineer to fix bugs, optimize code, or build backend features? I specialize in the Java programming language, delivering clean and efficient backend solutions.


What I can do for you:

* Java Bug Fixing: Quick debugging, resolving runtime errors, and refactoring.

* REST API Development: Designing and building secure APIs using Spring Boot.

* Database Integration: Connecting apps with SQL/NoSQL via Hibernate or Spring Data.

* API Integration: Connecting payment gateways or external third-party services.


My Tech Stack:

* Language: Java

* Frameworks: Spring Boot, Spring MVC, Spring Security

* Data Access: Hibernate, Spring Data JPA

* Databases: PostgreSQL, MySQL


Why choose me?

* Clean, well-documented code following industry best practices.

* Fast delivery focused on solving your immediate problems.

* Clear and fluent communication in English.


Please contact me BEFORE placing an order to discuss your project requirements. Let's work together!

Get to know Serhii K

Serhii K

Full Stack Java Angular Developer

  • FromUkraine
  • Member sinceJun 2026
  • Languages

    English, Ukrainian
I am a Software Engineer with 3.5 years of experience in developing scalable applications using Java and Spring Framework. My expertise lies in designing web applications using monolithic and microservice architectures, particularly in telecommunications. I am passionate about using technology to innovate and solve practical problems.