Senior Java Engineer (Kraków, PL, 30-302)

GFT Technologies SE; Kraków; On-site; PLN 163,000 - 249,000; Full time

Job summary

GFT Technologies SE in Kraków is seeking a Senior Java Engineer to design, develop, and maintain modern microservices-based applications using Java 17/21 and Spring Boot.

You will contribute across the full development lifecycle, mentor peers, support production systems, and drive DevSecOps practices while collaborating with QA and business teams to deliver robust, scalable solutions.

Qualifications

• 4+ years of hands-on Java development.
• Experience designing and developing microservices with Java 17/21 and Spring Boot.
• Strong knowledge of PostgreSQL.
• Experience with DevSecOps pipelines.
• 3+ years in Agile and/or DevOps teams.
• Experience using TDD and JUnit.
• Experience creating integration and regression tests.
• Ability to work across the full SDLC.
• Strong analytical and problem-solving skills.

Responsibilities

• Design, develop, and maintain Java-based microservices.
• Contribute across the full software development lifecycle.
• Support production systems and monitor incidents.
• Mentor junior team members and share knowledge.
• Drive DevOps adoption and automation.
• Translate business requirements into scalable technical solutions.
• Collaborate with QA and business teams to deliver high-quality software.
• Improve development processes and team velocity.

Skills

Java development

Microservices

Java 17/21

Spring Boot

PostgreSQL

DevSecOps

Agile/DevOps

TDD

JUnit

Integration tests

Full SDLC

Requirements translation

Analytical skills

Job description

Type of contract: Employment contract

Salary range: 14600-22300 PLN gross

What will you do?

As a Senior Java Engineer, you will be responsible for designing, developing, and maintaining modern applications built on a microservices architecture. You will contribute across the entire software development lifecycle, support production systems, and work closely with engineering, QA, and business teams to deliver high-quality solutions. You will also help drive DevOps adoption, improve development processes, and mentor less experienced team members.

Your tasks

• Design, build, and maintain efficient, reusable, and reliable Java code
• Develop and maintain microservices-based applications using Java and Spring Boot
• Contribute throughout all phases of the software development lifecycle
• Adopt Agile and DevOps best practices
• Implement test-driven development and collaborate closely with QA engineers
• Improve development team velocity and software quality
• Mentor junior team members and support knowledge sharing
• Support production systems through monitoring, incident resolution, and problem management
• Develop automation tools to improve operational support processes
• Translate business requirements into scalable technical solutions
• Provide innovative solutions to complex technical challenges

Your skills

• 4+ years of hands-on Java development experience
• Experience designing and developing microservices using Java 17/21 and Spring Boot
• Strong knowledge of PostgreSQL
• Experience with DevSecOps pipelines
• 3+ years of experience working in Agile and/or DevOps teams
• Experience using TDD and JUnit
• Experience creating integration and regression tests
• Ability to work across the full software development lifecycle
• Experience translating functional requirements into technical solutions
• Strong analytical and problem-solving skills