Java Developer (e-commerce system)

We are looking for a Java enthusiast with an architectural mindset who will play a key role in developing an e-commerce ecosystem for a leader in the heating industry. This is a mission-critical tool used by professional installers and partner companies to source complex industrial components.

Our expectations

• Experience ( 5+ years) and deep, practical knowledge of Java (including JVM internals, memory management, and multi-threading/concurrency).

• Proficiency in Spring Boot, Spring Data, and Spring Security.

• Experience in building systems using Apache Kafka or RabbitMQ. Crucially, they must understand data flow in distributed environments.

• Practical knowledge of CQRS and Event Sourcing (experience with Axon Framework or similar is a plus).

• Comfortable navigation in the world of containers (Docker, Kubernetes).

• A practical approach to CI/CD (Gradle, GitHub Actions) and a willingness to work with MS Azure.

• Proficiency in relational databases (e.g., PostgreSQL, MySQL) and NoSQL (e.g., MongoDB).

• Hands-on experience with Testcontainers, JUnit, Mockito, and E2E/integration testing.

• Ability to analyze business requirements, translate them into architecture, and to justify the decisions to the team.

• Proficiency in English (min. B2 level)

• Participation in on-site workshops in client's office once per quarter (Katowice)

Main responsibilities

• Designing and developing an ecommerce application in collaboration with cross-functional teams

• Development of robust backend APIs and integrations for product catalog, orders placing, orders management, logistics provider, checkout and payment integrations

• Implementation of responsive, resilient, user-friendly application services

• Transformation of ideas and designs into application code and working functionalities

• Manage our platform end to end – from strategy with cooperation with architect to operations and support (including product documentation and deployment processes and CI/CD practices)

• Design and implementation of tests scenarios for components to ensure ecommerce platform successful