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Sopra Steria Logo Sopra Steria · IT - Software Development

Junior Software Engineer (Java)

Poland, Katowice Employment contract 5500.00 - 8500.00 PLN / Month · Job Posted March 19, 2026
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Job Description

We are looking for a Junior Software Engineer (Java) to join Sopra Steria Polska and support the development team responsible for integrating the Simpl-Open middleware into the Language Data Space (LDS) ecosystem. In this role, you will contribute to software development, technical integration, configuration, testing, deployment support, and operational troubleshooting. You will collaborate closely with senior engineers, architects, and technical leads as part of a cross-functional engineering team delivering interfaces and runtime integrations between LDS components and Simpl-Open services.

Job Responsibility

  • Implement backend services, API integrations, and technical adapters under the guidance of senior engineers
  • Configure and integrate identity, authentication, authorization, and connector-related services
  • Develop and maintain integration logic for metadata exchange, catalogue interfacing, and validation flows
  • Support vocabulary-related interoperability, mappings, and configuration tasks
  • Prepare and execute technical tests, including integration tests, deployment verification, and regression checks
  • Investigate incidents, defects, and integration issues in development and test environments
  • Contribute to CI/CD activities, containerised deployments, and runtime support tasks
  • Produce concise technical documentation, configuration notes, and implementation handover material

Requirements

  • Strong proficiency in Java and Spring Boot for backend service development
  • Hands‑on experience with containerization and orchestration tools, specifically Docker and Kubernetes
  • Experience with backend development and API-based integration
  • Good command of secure application integration and service-to-service communication
  • Experience with version control, debugging, testing, and software delivery practices
  • Familiarity with containerized environments and deployment support activities
  • Ability to analyze issues methodically and deliver reliable technical fixes
  • Willingness to learn, document work clearly, and contribute in a team-oriented delivery setting
  • Experience working with REST APIs and API specification formats such as OpenAPI using JSON/YAML
  • Knowledge of authentication and authorization technologies, including Keycloak, OAuth 2.0, and OpenID Connect
  • Degree in Computer Science, Software Engineering, Information Systems, Telecommunications, or equivalent practical experience
  • Professional experience in software development, systems integration, platform engineering, or backend delivery
  • EU citizenship
  • Fluent English: B2/C1
  • Being open to occasional business trips abroad and visits to our office in Katowice

Nice to have

  • Exposure to identity and access management platforms, metadata catalogues, semantic technologies, or data-platform delivery is an advantage
  • Experience with public-sector digital platforms, interoperability solutions, or EU-funded technical environments is also beneficial

What we offer

  • Luxmed
  • Medicover Sport
  • Worksmile
  • educational platforms
  • languages learning platform
  • referral bonus
  • copyrights
  • life insurance
  • workation
  • certifications (paid by the company)
  • conferences
  • Tech Lunches
  • possibility to join our Communities (Project Management, Architecture, Security, Process Management, Leadership, AI and Cloud)
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