Senior Java Backend Engineer– Identity & Security (REF5698K)
Deutsche Telekom IT Solutions19 days ago
Budapest, HungarySenior
Responsibilities
- Design, implement, and maintain backend services using Java and Spring Boot.
- Evolve the modular monolith toward a cleaner hexagonal architecture and improve domain separation.
- Implement and secure OAuth 2.0/OIDC identity and access-management flows and APIs.
- Develop and maintain RESTful APIs and service interfaces.
- Design and optimize PostgreSQL schemas and manage Flyway migrations.
- Implement event-driven integrations using Apache Kafka.
- Contribute to HSM-backed key management, data encryption, personal-data protection, and regulatory compliance.
- Develop automated tests with JUnit 5 and Testcontainers.
- Improve observability and operational readiness through structured logging, metrics, and tracing with OpenTelemetry.
- Collaborate with architects, SREs, security engineers, and QA engineers, and participate in reviews, architecture discussions, and documentation.
Requirements
- At least 5 years of professional backend software engineering experience.
- Strong expertise in Java, Spring Boot, REST API development, and PostgreSQL.
- Experience implementing OAuth 2.0, OpenID Connect, or similar authentication and authorization solutions.
- Experience designing modular, maintainable backend systems and applying modern software architecture principles.
- Experience with JUnit, CI/CD pipelines, and Git-based development workflows.
- Experience in regulated, security-critical, or compliance-driven environments.
- Fluent written and spoken English.
- Advantageous experience with Apache Kafka, Avro, Schema Registry, Flyway, Testcontainers, Spring Security, OpenAPI/Swagger, Micrometer, OpenTelemetry, Docker, and Kubernetes.
- Advantageous experience with HSMs, applied cryptography, secure software development, digital identity, healthcare, or public-sector platforms.
- Familiarity with hexagonal architecture, Domain-Driven Design, and ArchUnit is advantageous.
- German language skills are a strong advantage.
Benefits
- Opportunity to contribute to an advanced digital identity platform serving Germany's healthcare infrastructure.
- Work with Java 25, Spring Boot 4.1, identity management, security, and healthcare technologies.
- Strong engineering culture focused on architecture, code quality, and technical excellence.
- Collaboration with experienced architects, security specialists, and platform engineers.
- Professional growth opportunities in software architecture, cybersecurity, and identity solutions.
- International and multicultural working environment.
- Remote work is available only within Hungary due to European taxation regulations.
Tech Stack
Categories