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Backend Software Developer (Java / Spring Boot) Miejsce pracy: Warszawa Technologies we use Expected Java Spring Boot SQL PostgreSQL TimescaleDB MS SQL Azure Pipelines Git Maven Gradle Apache Kafka Optional Angular TypeScript HTML CSS Splunk Microsoft Azure Docker Kubernetes Kafka MQTT Confluence Jira Operating system Windows Linux About the project For our client, a global manufacturer of advanced industrial machinery, we are looking for a Backend Software Developer (Java/Spring Boot). Your responsibilities Develop, maintain, and enhance modern backend services based on Java and Spring Boot. Design and implement RESTful APIs and ensure secure, scalable integrations, leveraging Apache Kafka for event-driven architectures and real-time data streaming. Work with relational databases (e.g., PostgreSQL, TimescaleDB, MS SQL), including writing efficient queries and basic performance tuning. Collaborate with other backend developers and QA engineers to deliver high-quality solutions. Ensure code quality through testing, CI/CD integration, and proper documentation. Support development for the e-connect portal, focusing on backend microservices and data integration. Our requirements Degree in Computer Science, Software Engineering, or equivalent. 2–4 years of professional experience in backend development with Java and Spring Boot. Solid understanding of relational databases and SQL. Familiarity with CI/CD concepts and tools (Azure Pipelines experience is a plus). Proficiency with version control (Git) and build tools (Maven/Gradle). Strong analytical skills, structured working style, and team-oriented mindset. Good command of English; German is an advantage. Optional Basic knowledge of frontend technologies (Angular, TypeScript, HTML, CSS). Knowledge of monitoring and logging tools (e.g., Splunk). Experience with cloud platforms, particularly Microsoft Azure. Familiarity with containerization and orchestration (Docker, Kubernetes). Experience with messaging systems such as Kafka or MQTT. Experienced in using Atlassian tools such as Confluence and Jira for documentation, collaboration, and project management. Familiarity with MES (Manufacturing Execution Systems) environments and handling MES-related data. This is how we organize our work Team size 4-6 This is how we work in house you focus on product development agile scrum Team members backend developer frontend developer manual tester This is how we work on a project Clean Code code quality measures Continuous Deployment Continuous Integration documentation Development opportunities we offer development budget external training industry-specific e-learning platforms intracompany training mentoring soft skills training space for experimenting substantive support from technological leaders technical knowledge exchange within the company time for development of your ideas What we offer Attractive basic salary plus a 13th and 14th month salary (the 14th month salary is linked to the achievement of individual targets set for the year). The base salary amount is negotiable for highly skilled candidates. Employment based on an employment contract (contract directly with our client in Poland). Work tools, such as: telephone, laptop with necessary software. Work in an international, stable organisation with low staff turnover. Benefits package: Private medical care, Multisport card, Group insurance, access to a language platform (English and German). An organisational culture that emphasises work ethic and cooperation between employees. Benefits sharing the costs of sports activities private medical care sharing the costs of foreign language classes life insurance integration events About the Team: You will join a small, agile hybrid team of 4–6 professionals based between European and Kraków. The team is focused on developing scalable microservices and cloud-native applications using Java, Spring Boot, Kubernetes, and Azure cloud technologies. Collaboration, timely knowledge sharing, and cross-site communication are key to the team’s success. Your role will be critical in shaping backend architecture and helping to integrate backend services with frontend Angular components. A major focus will be on the e-connect portal, which serves as a central platform for digital customer engagement. The team culture emphasizes innovation, continuous learning, and quality-driven development within a supportive environment.