Senior Java Backend Developer – Cloud-Native Microservices & Cryptography We are looking for a Senior Java Backend Developer to lead the design, development, and maintenance of secure, scalable, cloud-native microservices for our Trusted Service Manager (TSM) platform. This role focuses on backend development with Spring Boot 4, cryptographic operations, automation, and test-driven practices in a Kubernetes-based environment.
Key Responsibilities
Lead the end-to-end development and implementation of TSM backend services and microservices. Design, develop, and optimize robust Java backend applications using: Spring Boot 4 (including Spring Boot Actuator) Spring Cloud Spring Data Implement and maintain API-first architectures (REST, Open API), ensuring clear contracts and maintainable integrations.
Build, deploy, and operate cloud-native applications using: Docker containers Kubernetes (K8s) CI/CD pipelines and automation tooling Implement secure cryptographic operations, including: PKI-based workflows X.509 certificate lifecycle management Encryption, signing,



and key management best practices Design data models and access layers using Mongo DB for scalable, high-performance storage.
Drive automated testing and quality assurance: TDD and BDD Unit, integration, and end-to-end test automation Security testing (SAST, DAST) Apply and advocate agile methodologies (Scrum), engineering best practices, and secure coding standards. Collaborate closely with architects, product owners, QA engineers, and other developers to deliver high-quality solutions. Guide and mentor other team members, promoting knowledge sharing and continuous improvement. Contribute to observability and operations using Spring Boot Actuator and monitoring/logging tools.
Required
Skills & Experience University degree in Computer Science, Software Engineering, or a related field. Extensive experience as a senior backend Java developer. Strong, hands-on expertise with: Spring Boot (v4), including Spring Boo

📌 Senior java backend developer (Santander)
🏢 Giesecke+Devrient
📍 Santander