Java Engineer r. 1679

We are seeking a skilled and experienced Java Back-End Developer to join our team on a hybrid project on behalf of one of our largest clients in the energy sector.

Your responsibilities will entail:

• Design and develop backend microservices using Java 21 and Spring Boot 3.x;
• Build and maintain RESTful APIs with clear error handling and documented OpenAPI/Swagger specifications;
• Implement gRPC services and clients, including Protobuf schema design;
• Develop event-driven solutions using Apache Kafka consumers and producers;
• Integrate backend services with external systems (OIC, Salesforce, SAP ISU);
• Implement authentication and authorization using OAuth 2.0 / OIDC, including token validation and role-based access;
• Write unit and integration tests using JUnit 5, Mockito, and Testcontainers;
• Collaborate with DevOps teams on containerized deployments in Docker and Kubernetes;
• Ensuring that all activities and duties are carried out in full compliance with regulatory requirements and supporting the continued implementation of the Group Anti-Bribery and Corruption Policy.

Requirements

• University degree in Computer Science, Engineering, or a related field;
• 3–5+ years of experience in backend development;
• Strong hands-on experience with Java (preferably Java 21) and modern language features;
• Proven experience with Spring Boot (microservices, REST controllers, data access layers, security);
• Experience migrating applications from older Java versions (e.g., Java 11);
• Solid knowledge of Kafka-based event-driven architectures;
• Experience with PostgreSQL, Azure Cosmos DB, and Redis;
• Good understanding of containerization (Docker) and Kubernetes fundamentals;
• Strong understanding of backend security concepts (OAuth2, OIDC, RBAC);
• Experience writing automated tests at unit and integration level;
• Experience working in an Agile environment;

Nice to Have

• Integration experience with Confluent Kafka or Azure Event Hubs;
• Exposure to AKS environments;
• Previous work with enterprise integrations (Salesforce, SAP ISU);
• Familiarity with cloud-native observability tools;
• Familiarity with Azure DevOps.

Benefits:

• Private insurance
• Hybrid working Model
• Unlimited free access to wellness workplace support platform
• A dynamic challenging environment resulting in continuous learning / education / progression
• Ability to work with cutting edge technologies
• Pleasant working environment

UpcoMinds is a dynamic IT company with 28 years of experience that provides end-to-end web and mobile solutions helping businesses to reinvent themselves in the digital world. Our team’s skills and expertise will ensure the holistic digital transformation of any organization, which will considerably improve both business operations and customer’s experience.

Our goal is to always have our end products and services reflect our deep engineering skills and elegant progressive design aesthetic. We fundamentally believe deeply in developing long term strategic partnerships with our clients by exceeding expectations and maintaining a high level of transparency.

Find out more about us at www.upcominds.com

We commit to promote Inclusion & Diversity by creating a working environment where all employees are treated with dignity and respect and where individual differences are valued. We offer equal opportunity in all aspects of employment.

Our recruitment consultants will go through your Curriculum Vitae as soon as possible and get back to you to discuss the opportunity for which you apply. If you don’t hear from us in the coming ten (10) working days, you may consider that you have not been selected for the particular job. Your CV will be retained for two years in accordance with GDPR regulations.