Senior Java Backend Engineer: Microservices & Cloud

Capgemini; Kraków; Hybrid; PLN 180,000 - 320,000; Full time

Benefits offered by this job

Hybrid work model

Extensive training programs

Private medical care (Medicover)

Job summary

Capgemini Polska is seeking an experienced Senior Java backend engineer to design and develop backend systems using Java and the Spring ecosystem. You will focus on microservices with high performance, scalability, and automated testing, while collaborating with DevOps on cloud infrastructure.

The role requires strong Java fundamentals, Spring Boot, REST API design, and 5+ years of experience. A hybrid work model, modern office environment, and opportunities for training are offered.

Qualifications

• 5+ years of Java development experience.
• Strong knowledge of core Java and memory management.
• Experience with Spring Boot and Spring Data.
• Designing REST APIs and microservices.
• Unit and integration testing with JUnit/Mockito.
• Familiarity with cloud and DevOps practices on GCP.

Responsibilities

• Designing and developing backend systems using Java and Spring ecosystem.
• Building and maintaining microservices-based architectures.
• Writing high-quality, maintainable code with focus on performance.
• Implementing unit and integration tests (JUnit, Mockito).
• Collaborating with DevOps on cloud infrastructure (GCP, Terraform).
• Participating in code reviews and architecture design.

Skills

5+ years Java development

Core Java knowledge

Memory model & GC understanding

Concurrency & multithreading

REST APIs & microservices design

Spring Boot & Spring Data

Tools

Docker

Kubernetes

Jenkins

GitLab CI

Terraform

GCP

Job description

Capgemini Polska is seeking an experienced Senior Java backend engineer to design and develop backend systems using Java and the Spring ecosystem. You will focus on microservices with high performance, scalability, and automated testing, while collaborating with DevOps on cloud infrastructure.

The role requires strong Java fundamentals, Spring Boot, REST API design, and 5+ years of experience. A hybrid work model, modern office environment, and opportunities for training are offered.