Senior Java Developer (hybryda - Kraków)

🏢 Summary: Hybrid Java development role focused on building and maintaining systems that process high volumes of real-time data. The role includes delivering new functionality, database work, testing, performance validation, code reviews, and deployment preparation, with only 1–2 office days per month in Warsaw. 🗂️ Requirements: Commercial Java development experience, Experience with high-volume real-time data processing systems, Hands-on Apache Kafka experience, Unit and integration testing experience, Knowledge of relational databases, Understanding of software development best practices and quality standards 📃 Skills: Java, Kafka, Databases, Testing, Performance 🏢 Description: Java Developer (Kafka) 📍 Warsaw | Hybrid model (only 1-2 days per month in the office) We are looking for a Java Developer to join a project within the focused on the development and maintenance of systems that process large volumes of real-time data. Responsibilities Preparing and configuring development environments. Developing and implementing new functionalities. Creating and modifying database structures. Designing and executing unit and integration tests. Developing and performing performance tests. Ensuring that implemented changes comply with system architecture and quality standards. Participating in code reviews and quality assurance activities. Preparing solutions for deployment, including code repository management, configuration updates, and deployment documentation. Requirements Commercial experience in Java development. Experience working with systems that process large volumes of real-time data. Hands-on experience with Apache Kafka . Experience creating and executing unit and integration tests. Knowledge of relational databases. Understanding of software development best practices and quality standards. Nice to Have Knowledge of the Java Swing library. Experience developing and maintaining desktop applications based on Java Swing. What We Offer Hybrid work model with only 1-2 days per month in the Warsaw office . Opportunity to work on modern, real-time data processing systems. Long-term cooperation in a stable project environment. Collaboration with experienced professionals and opportunities for professional growth.

🏢 Summary: Hybrid Java Developer role on a long-term enterprise project involving development and maintenance of systems that process high volumes of real-time data. The work covers Java development, database components, testing, quality assurance, and deployment support, with only 1–2 office days per month in Warsaw. 🗂️ Requirements: Commercial Java development experience, Experience with high-volume real-time data systems, Hands-on Apache Kafka experience, Relational database and database development experience, Unit and integration testing experience, Understanding of development best practices, code reviews, and quality standards, Experience in enterprise-scale environments 📃 Skills: Java, Kafka, SQL 🏢 Description: 📍 Warsaw | Hybrid model (only 1-2 days per month in the office) We are looking for a Java Developer to join a project focused on the development and maintenance of systems processing large volumes of real-time data. This role combines software development, database-related activities, testing, and deployment support within a complex enterprise environment. Responsibilities Prepare and maintain development environments. Develop and implement new functionalities and enhancements. Create, modify, and maintain database components. Prepare and execute unit and integration tests. Design and perform performance testing activities. Verify compliance of delivered solutions with system architecture, coding standards, and quality requirements. Participate in code reviews and quality assurance processes. Prepare software changes for deployment, including code repository management, configuration updates, and deployment documentation. Requirements Commercial experience in Java development. Experience working with systems processing large volumes of real-time data. Hands-on experience with Apache Kafka . Experience with relational databases and database development. Experience creating and executing unit and integration tests. Understanding of software development best practices, code reviews, and quality standards. Experience working in enterprise-scale environments. Nice to Have Knowledge of the Java Swing library. Experience in developing and maintaining Java desktop applications. What We Offer Hybrid work model with only 1-2 days per month in the Warsaw office . Long-term cooperation on a stable and challenging project. Opportunity to work with modern technologies and real-time data processing solutions. Collaboration with experienced professionals in a dynamic environment. Professional growth and participation in business-critical initiatives.

🏢 Summary: Long-term B2B Senior Java Developer contract for building secure, high-performance backend data-processing solutions in a microservices architecture. The role involves Java and Kafka development, CI/CD delivery, database integration, testing, monitoring, and security implementation in a hybrid work model. 🗂️ Requirements: 10+ years of Java development experience, Strong Kafka expertise, Experience with Confluent Kafka, Experience with KStreams, Experience with MongoDB Atlas, Experience with PostgreSQL 📃 Skills: Java, Kafka, Confluent, KStreams, MongoDB, PostgreSQL, Microservices, CICD 🏢 Description: Contract : B2B, long term Rate : 180-200 PLN/h Mode : Hybrid, 2-3 days per week at the office Location : Warsaw Summary: The Senior Java Developer is primarily responsible for designing and developing backend applications while ensuring adherence to high standards of security, performance, and quality. This role focuses on leveraging extensive experience in Java and Kafka to build robust data processing solutions within a microservices architecture. Main Responsibilities: Building, testing, and deploying software using CI/CD pipelines. Creating microservices for data processing, database interactions, and data exposure. Implementing relevant architectural patterns for data handling and web services. Ensuring accurate logging and alert configurations for operational efficiency. Conducting comprehensive testing of software for various performance criteria. Integrating security features, including authentication and authorization controls. Participating in a developer guild to share best practices and technical knowledge. Key Requirements: 10+ years of relevant experience in Java development. Strong expertise in Kafka, particularly with Confluent Kafka and KStreams. Experience with MongoDB Atlas and PostgreSQL as database technologies. Nice to Have: Familiarity with authentication protocols such as OIDC, OAuth2, and SAML. Experience with containerization technologies like Docker. Knowledge of Kubernetes for container orchestration. Experience with the ELK stack for logging, monitoring, and alerting.