Senior Java Developer

Senior Java Developer Warsaw (hybrid: 1 day a week from the office) 140-170 PLN/h net + VAT (B2B) Join a long-term project implemented in a large enterprise environment. We are looking for an experienced Senior Java Developer who will participate in the development and maintenance of key business systems operating in a microservice and monolithic architecture. This role is for someone who values high code quality, modern technologies, and a real impact on the development of large-scale solutions. Your tasks: Development and maintenance of systems based on microservice and monolithic architecture Participation in architectural design and selection of technological solutions Optimization and automation of business processes Creation and development of automated tests Conducting and participating in code reviews Scrum team collaboration Diagnostics and optimization of application performance Utilization of modern tools supporting software development, including AI solutions Requirements: Minimum 5 years of commercial experience in Java programming Minimum 3 years of experience with Apache Kafka Very good knowledge of Spring, Spring Boot, Spring Cloud, and Hibernate Very good knowledge of SQL Knowledge of Git and Maven tools Experience in creating unit and integration tests (e.g., JUnit, TestNG, Spock, Testcontainers, WireMock) Knowledge of Object-Oriented Programming (OOP) and Functional Programming paradigms Experience working with Docker, Kubernetes (K8s), and Helm Knowledge of RabbitMQ and Elasticsearch Knowledge of process engines and BPMN notation Experience working with Angular Ability to design, develop, and scale applications in distributed environments Knowledge of patterns and mechanisms ensuring resilience of distributed systems Experience in independent business domain design Knowledge of tools for monitoring, diagnostics, and application performance analysis Ability to effectively use AI tools in the software development process Basic knowledge of IT Security used in designing and developing solutions Nice to have: Knowledge of Domain-Driven Design (DDD) and practical experience in its application Experience with cloud solutions Practical use of AI agents and Agentic AI tools in the software development process Experience in architectural design for systems with high scale and a large number of users We offer: Participation in strategic projects implemented in a large organization Work with a modern technology stack Benefits package: LuxMed and Multisport Real impact on product development and system architecture Collaboration with an experienced team focused on knowledge sharing and high code quality What you will gain by applying for the Antal offer? When your application is considered positively (you will be invited to the process), you will receive support from a Consultant who will maintain constant contact with you (by email or phone), help you prepare for the recruitment interview with the future employer, and ensure the quality of the recruitment process you are currently participating in. Who are we? We are a leader in the recruitment of specialists and managers and HR consulting. The brand is present in 35 countries, and in Poland, it has been operating since 1996. During this time, we have built many candidates' careers thanks to a flexible and comprehensive approach to all recruitments. Antal is made up of over 130 professional recruitment consultants who are not only effective recruiters but also qualified advisors specializing in both a selected sector and a position.