Senior Java Engineer (API & Microservices)

Senior • Hybrid

Krakow, Poland

We are looking for an experienced Java Engineer who wants to work on scalable, enterprise-grade solutions and have a real impact on system architecture and product development. This role combines hands-on software engineering with solution design, API governance, and close collaboration with cross-functional teams.

Hybrid model: 6-8 days per month from the office in Cracow

Responsibilities

Design, develop, and maintain scalable applications and microservices using Java technologies
Build secure, reliable, and high-performing APIs and backend solutions
Contribute to data modeling, system architecture, and solution design
Ensure non-functional requirements such as scalability, security, resilience, and reliability are embedded into the architecture
Drive API governance standards across security, process, and system APIs
Develop cloud-ready, flexible, and robust solutions
Collaborate with cross-functional teams to deliver scalable and efficient products
Troubleshoot and resolve complex production issues
Perform code reviews, unit testing, and maintain high engineering standards
Estimate development effort and support sprint planning activities
Work with CI/CD pipelines and follow DevOps best practices

Requirements

Strong hands-on experience with Java and Spring Boot
Proven experience building APIs and microservices architectures
Solid knowledge of Java/J2EE, Spring Framework, Hibernate, and JPA
Experience working with RESTful web services and processing XML/JSON data
Good understanding of secure coding principles and application security
Strong experience with relational and NoSQL databases such as Oracle, PostgreSQL, and MongoDB
Expertise in CI/CD pipelines, Jenkins, Docker, Git, shell scripting, and Unix/Linux environments
Strong understanding of Agile methodologies including Scrum and Kanban
Excellent analytical and problem-solving skills

Nice to Have

Experience with JavaScript and frontend technologies such as React, Angular, or Node.js
Familiarity with JavaScript build tools and dependency management
Experience creating responsive web applications (Bootstrap, mobile-first design, etc.)
Exposure to cloud platforms such as GCP, GKE, or AWS
Knowledge of system architecture and solution design principles
Experience or interest in Python, Machine Learning, or Data Science

We offer

Work in a global, forward-thinking cybersecurity environment
Real influence on cloud security strategy and standards
Flexible working model and strong career growth opportunities
Working under a B2B contract or an employment contract with Antal

Antal Sp. z o.o.

Antal Sp. z o.o. is a leading company in the recruitment and HR consulting industry. Established in Poland in 1996, Antal has expanded its presence to 35 countries, demonstrating a strong international footprint. The company is renowned for its flexible and comprehensive approach to recruitment, having successfully built numerous careers over the years. Antal employs over 130 professional recruitment consultants who are not only effective recruiters but also skilled advisors specializing in specific sectors and positions. The company's mission revolves around providing high-quality recruitment services and HR advice, ensuring a seamless and effective hiring process for both candidates and employers.

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