G+D ePayments

Senior Java Automation Developer – Microservices & Security Testing

We are looking for a Senior Java Automation Developer to lead the design and implementation of an automation framework for our cloud-native, microservices-based Trusted Service Manager (TSM) backend. The role focuses on building robust, scalable test automation solutions for Java/Spring Boot 4 microservices, cryptography operations, and API-first services running on Kubernetes.

Key Responsibilities

• Lead the design, development, and maintenance of test automation frameworks for TSM backend microservices (Java, Spring Boot 4, Spring Cloud, MongoDB).
• Implement comprehensive automated test suites (unit, integration, API, end-to-end) for cloud-native services deployed on Docker/Kubernetes.
• Design and execute advanced security testing:
• DAST (Dynamic Application Security Testing)
• Fuzz testing for APIs and cryptographic operations
• Build automation around API-first architectures (REST, OpenAPI), including contract testing and API validation.
• Integrate automated tests into CI/CD pipelines, ensuring high coverage and fast feedback for every deployment.
• Incorporate cryptography-related validation into test suites, including PKI workflows, X.509 certificates, and secure key usage.
• Apply agile methodologies (Scrum), TDD, BDD, and secure coding/testing best practices (SAST, DAST).
• Collaborate closely with backend developers, DevOps engineers, QA, and security teams to ensure robust and secure software delivery.
• Contribute to test observability and reporting, improving traceability, logging, and metrics for test runs.
• Mentor team members on test automation strategies, frameworks, and tools.

Required Skills & Experience

• University degree in Computer Science, Software Engineering, or a related field.
• Strong experience as a Java developer with a focus on test automation.
• Hands-on experience building automation frameworks for:
• Microservices (Java, Spring Boot)
• API-first services (REST, OpenAPI)
• Solid understanding of cloud-native architectures and deployments (Docker, Kubernetes).
• Strong knowledge of:
• Security testing methodologies (DAST, fuzz testing)
• SAST/DAST integration into CI/CD pipelines
• Deep understanding of cryptography, PKI, and X.509 certificates, and how to validate them in automated tests.
• Experience working in agile teams (Scrum), with TDD and BDD.
• Familiarity with large-scale, high-availability distributed systems from a testing and reliability perspective.
• Proficient with Atlassian and DevOps toolchains:
• Jira, Confluence
• Git (GitLab/GitHub)
• SonarQube, Jenkins, Nexus, Maven
• Strong problem-solving skills, capable of analyzing complex systems and designing effective test strategies.
• Excellent communication skills and a collaborative, team-oriented mindset.
• Fluent English (spoken and written).

Nice to Have

• Experience testing SDKs and client applications (mobile or desktop) that consume backend APIs.
• Knowledge of mobile phone development concepts and client–server interaction patterns.
• Experience in financial services, payment systems, or digital currency projects.

What we offer

• CULTURE: Join a professional, dynamic environment where collaboration, teamwork, and innovation are valued.
• PHILOSOPHY: Be part of a team where your ideas and contributions have real impact.
• SCHEDULE: Mon–Thu 8:30–17:30h, Fri 8:30–15:30h (1h flexible start time). Hybrid work options available.
• CONTRACT & BENEFITS: Permanent contract, annual training plan, summer intensive schedule, company parking, flexible compensation (transport, childcare, training, health insurance).
• CANTEEN: Onsite cafeteria with breakfast and lunch at subsidized prices.
• LOCATION: El Prat de Llobregat, Mercabarna exit. Accessible via Bus 88/110 from Barcelona or PR4 from El Prat.

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