June 28, 2026

Senior Java Developer – API & Microservices Expert

Senior • Hybrid

24,150 - 30,450 PLN

Krakow, Poland

Unleash innovation — master scalable APIs and Microservices to transform digital ecosystems!

Kraków-based opportunity with hybrid work model

As a Senior Java Developer – API & Microservices Expert, you will be working for our client, a leader in building cloud-native platforms focused on streamlining software development & compliance management. Contribute to cutting-edge microservice architectures, helping development teams achieve operational excellence and compliance. This role offers a chance to shape scalable solutions and advance your career in a dynamic tech environment.

Your main responsibilities:

  • Collaborate with cross-functional teams to design, develop, and implement impactful APIs and microservices.
  • Build robust backend solutions using Java and Kotlin, ensuring high performance and scalability.
  • Lead efforts in troubleshooting, optimizing, and ensuring seamless integrations across platforms.
  • Work within an agile CI/CD environment to deliver rapid, high-quality iterations.
  • Engage proactively with users and stakeholders to understand and respond to their needs.
  • Participate in peer code reviews and automate testing to maintain high development standards.

You're ideal for this role if you have:

  • Over 5 years of experience in software development, with a focus on Java and Kotlin.
  • Proven expertise in API creation, SQL/databases, and HTML/JavaScript.
  • Strong troubleshooting and analytical skills.
  • Experience working in Agile environments using Jira and Confluence.
  • Good understanding of microservices architecture.
  • Fluent English (B2+) communication skills.

It is a strong plus if you have: (optional)

  • Experience with cloud platforms like AWS, Azure, or GCP.
  • Knowledge of CI/CD pipelines with Jenkins.
  • Background in Systems Administration across Linux, AIX, or WAS platforms.

Language Required for the role:

  • Fluent English (B2+)

Eligibility to work in the European Union:

  • Only candidates with an existing legal right to work in the EU will be considered for this role.

#MAKEYourCareerBETTER

Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

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Warsaw, Poland

21,000 - 25,200 PLN

🏢 Summary: Senior Java Developer role focused on building scalable REST APIs and advanced backend systems using modern Java and Spring technologies. The position involves designing, developing, and testing secure enterprise solutions in a hybrid work model. It offers the opportunity to contribute to large-scale digital transformation initiatives. 🗂️ Requirements: 5+ years of professional experience in Java development, Strong expertise in Java 17+, Strong expertise in Spring Boot 3/4+, Experience with Git, Kubernetes, Jenkins, Flyway, RabbitMQ, and PostgreSQL, Experience in building and securing REST APIs, Ability to perform unit and integration testing, Ability to analyze requirements and translate them into technical solutions, Fluent English (written and spoken), Legal right to work in the European Union, Availability to work in a hybrid model (up to 2 remote days per week) 📃 Skills: Java, Spring, SpringBoot, Git, Kubernetes, Jenkins, Flyway, RabbitMQ, PostgreSQL, REST, UnitTesting, IntegrationTesting, Architecture, Security, English 🏢 Description: Unleash innovation with scalable enterprise solutions — shape the future of digital transformation! Warsaw-based opportunity with hybrid work model (up to 2 remote days per week). As a Senior Java Developer , you will be working for our client, a leading player in the technology industry committed to delivering cutting-edge software solutions. You will contribute to building robust, scalable REST APIs and advanced backend systems, empowering organizations to transform their digital landscapes and drive business success. This is your chance to grow your career at the forefront of technological innovation. Your main responsibilities: Analyze requirements and convert them into comprehensive technical tasks, supporting the development process. Propose and challenge technical solutions to ensure optimal implementation. Develop functionalities in Java 17+ using Spring Boot 3/4+ in line with architectural and security standards. Conduct thorough unit and integration testing to ensure code quality. Create and update technical and architectural documentation for ongoing project clarity. Share knowledge with team members to foster continuous learning and improvement. Stay updated on technological advancements and suggest innovative enhancements. You're ideal for this role if you have: 5+ years of professional experience in Java development or relevant fields. Strong expertise in Java 17+ and Spring Boot (version 3 or 4+). Experience with Git, Kubernetes, Jenkins, Flyway, RabbitMQ, and PostgreSQL. Proven ability to analyze complex requirements and translate them into technical solutions. Solid understanding of REST API development, architecture, security, and best practices. Excellent communication skills in fluent English. Ability to work in a hybrid model, with up to 2 remote days per week. It is a strong plus if you have: Knowledge of containerization and orchestration tools or certifications. Experience working within Agile teams or with CI/CD pipelines. Language Required for the role: Fluent English, written and spoken. Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.