Senior Software Engineer - Remote (Serbia)

Serbia·Belgradesenior

Software EngineerSoftware Engineering

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Quick Summary

Overview

We are Knowledge Lab — a leading provider of cutting-edge IT solutions for banks, insurers, and the public sector since 2016. Our interdisciplinary team of experts operates from Zurich, Mendrisio, Belgrade, Barcelona, and Madrid, designing and implementing advanced technologies that transform…

Requirements Summary

A bachelor's or master's degree in computer science, or equivalent hands-on experience in software engineering At least 6 years of professional experience in Java development Understanding of Java EE 8 concepts, including application servers (JBoss…

Technical Tools

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We are Knowledge Lab — a leading provider of cutting-edge IT solutions for banks, insurers, and the public sector since 2016. Our interdisciplinary team of experts operates from Zurich, Mendrisio, Belgrade, Barcelona, and Madrid, designing and implementing advanced technologies that transform industries. We combine technical excellence with creative problem-solving to drive digital transformation across sectors. Become a part of it as a Senior Software Engineer and shape the future with us.

About the Role: You will join a strategic and technically challenging modernization journey, working on the migration of a large-scale enterprise application from Java EE to Spring Boot 3 and from JSP/JSF to Angular. This is a unique opportunity to apply your deep Java expertise and your knowledge of both legacy enterprise architectures and modern cloud-native paradigms, playing a central role in shaping the future of a critical business platform.

Your Tasks:

Contribute to the migration from Java EE 8 to Spring Boot 3, ensuring architectural integrity and code quality throughout the process
Rewrite from JSP/JSF to Angular 18+, working in close collaboration with frontend specialists
Design and implement cloud-native Java applications following modern best practices
Troubleshoot and resolve issues across the full stack, keeping the system stable, secure, and performant

Your Skills:

A bachelor's or master's degree in computer science, or equivalent hands-on experience in software engineering
At least 6 years of professional experience in Java development
Understanding of Java EE 8 concepts, including application servers (JBoss EAP 8.0), JSP, and JSF
Strong, production-level proficiency in Spring Boot 3 and Java 17 or higher
Experience with Angular 18+
Understanding of cloud-native application principles in the Java ecosystem (12-factor apps, containerization, observability)
Basic understanding of Kubernetes, Helm and GitOps Practice
Familiarity with Jenkins and GitHub
Experience using Jira
Fluent English is essential; German language skills are an advantage

What We Offer