We create trust in the digital age with integrated security technologies in three business areas: Digital Security, Financial Platforms and Currency Technology. At Payment Technology, our mission is to be at the start of every transaction and to make it secure and simple. We also create contemporary payment and banking solutions for our digital age. As a one-stop shop, we produce and personalise hundreds of millions of payment cards every year and store their "digital twins"
- mobile and digital. Would you like to actively shape the digital transformation with us? About the ProjectJoin a team working on one of G+D's strategic projects in digital payments: the Digital Euro . G+D has been selected by the European Central Bank (ECB) as the first-ranked provider for the Digital Euro offline solution, contributing to the development of a key component of the future digital euro infrastructure.
Within this project, you will work on a specialized Trusted Service Manager (TSM) platform, helping ensure that its backend services are secure, reliable and thoroughly tested . The core architecture and initial product are already in place. The team is now focused on expanding the platform with new features and building robust automation around it.
SummaryWe 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 CloudSpring DataImplement and maintain API-first architectures (REST, OpenAPI), ensuring clear contracts and maintainable integrations.
Build, deploy, and operate cloud-native applications using:Docker containersCI/CD pipelines and automation toolingImplement secure cryptographic operations, including:PKI-based workflowsEncryption, signing, and key management best practicesDesign data models and access layers using MongoDB for scalable, high-performance storage.
Drive automated testing and quality assurance:TDD and BDDUnit, integration, and end-to-end test automationSecurity 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.
Contribute to observability and operations using Spring Boot Actuator and monitoring/logging tools.
Required Skills & ExperienceUniversity degree in Computer Science, Software Engineering, or a related field.
Extensive experience as a senior backend Java developer.
Spring Boot (v4),



including Spring Boot ActuatorSpring Cloud and Spring DataProfessional experience designing and implementing microservices in cloud-native environments.
Proficiency in MongoDB, including schema design, performance tuning, and operational considerations.
Solid knowledge of Docker and Kubernetes for containerized deployments and orchestration.509 certificatesSecure key management and cryptographic protocolsExperience in agile teams (Scrum) with:TDD and BDDAutomated testing strategiesSecurity testing (SAST, DAST)Familiarity with large-scale, high-availability, enterprise-grade systems.
Hands-on experience with Atlassian and DevOps tooling:Jira, ConfluenceGit (GitLab/GitHub)SonarQube, Jenkins, Nexus, MavenStrong problem-solving skills, with the ability to troubleshoot complex distributed systems.
Fluent English (spoken and written). Nice to HaveExperience developing SDKs (Java or other languages) for external integration.
Knowledge of client application development (e.mobile or desktop clients interacting with backend APIs). Background in financial services, payment systems, or digital currency projects.
This role is ideal for a senior backend engineer who enjoys working on secure, high-availability microservices, is comfortable with advanced cryptography, and wants to drive automation and quality across the entire delivery lifecycle.
Innovative Products: Design and develop business processes and IT solutions for innovative products and digital solutions.
Continuous training and coaching, talent program.
Social

Benefits:
flexible compensation (transport tickets, childcare vouchers, training, private insurance) and in-house parking.
Versátil work time and remote work: M-Th ** and Fri **, hybrid model.

📌 Senior Back-End Java Developer (Valladolid)
🏢 Giesecke+Devrient
📍 Valladolid