Senior Fullstack Java Developer - Frankfurt - Start ASAP - 2 days PW onsite in Frankfurt required

Senior Fullstack Java Developer – Frankfurt

Location: Frankfurt, Germany (Hybrid – 2 to 3 days per week onsite)

Type: Contract – Start ASAP – 2 days per week onsite required

Job Description

• Seniority Level: High (Level 3) – This is a senior consultant role requiring at least 8 years of experience in software development. Level 3 developers have comprehensive knowledge of the client’s business domain and are expected to anticipate challenges, take responsibility for delivering high‑quality results, manage risks, and contribute to long‑term technical planning aligned with project objectives.
• Required Skills & Qualifications: Level 3 Software Developers must meet all key skill requirements defined for this project, typically overlapping with Level 2 but with greater depth and leadership.

Essential Skills and Qualifications

• Full‑stack Java development expertise: Experience across the entire software development lifecycle for Java‑based backend systems, using frameworks such as Spring Boot, Hibernate, or Micronaut.
• API & microservices development: Proven knowledge in building scalable, secure, and efficient RESTful APIs and microservices architectures; integrating databases (MySQL, PostgreSQL, MongoDB) and third‑party services into backend systems.
• Web front‑end proficiency: Ability to design and develop intuitive, responsive web user interfaces, with strong skills in HTML5, CSS3, JavaScript, and modern front‑end frameworks like React, Angular, or Vue.js.
• DevOps and cloud CI/CD skills: Experience implementing and managing DevOps practices on cloud platforms – including creating CI/CD pipelines, using infrastructure‑as‑code tools (Terraform), and containerization with Docker/Kubernetes for scalable deployments.
• Agile methodology experience: Demonstrated experience delivering software projects using agile frameworks (preferably SAFe, Scrum, and/or Kanban), collaborating effectively in iterative development environments.
• Automated testing expertise: Proficiency in the full testing lifecycle – including design, development, and maintenance of automated end‑to‑end tests for large‑scale systems, using frameworks such as Selenium or Robot Framework.

Key Responsibilities

• Design, development, and maintenance of core systems: Lead the implementation of complex software solutions in line with client requirements. Architect and code major features of the Digital Euro testing support tools, ensuring well‑engineered, secure, and efficient backend services and web portals. Design technical solutions, write and review code, and guide the overall architecture of the deliverables.
• End‑to‑end software engineering: Oversee the full development lifecycle: from refining specifications and developing new functionalities to conducting thorough unit and integration testing, bug fixing, and performance optimization of the applications. Set up and improve CI/CD pipelines and DevOps processes to automate builds, testing, and deployment.
• Technical oversight and team guidance: Provide technical leadership and mentoring for the development team. Coordinate with other team members (including Level 2 developers) to ensure code quality and alignment with best practices. Identify critical problems or architectural challenges, develop innovative solutions, and ensure the team’s work meets project quality standards and deadlines.
• Collaboration and reporting: Work closely with the Digital Euro project team and other stakeholders. Participate in design and planning workshops, closely collaborate with internal and external partners (e.g., National Central Banks, PSPs, and other service providers) for integration needs, and contribute to regular progress meetings and reports. Act as key points of contact for technical matters and assist the contract manager in coordinating complex development tasks.
• Expected Deliverables / Outputs: Deliver major project outputs and ensure technical documentation is maintained.
• Work products include:
  • Core software components for the Digital Euro testing environment – notably, the Digital Euro Simulator backend, the EAT testing tools, and the DESP Member Portal as described in the call‑off, developed and delivered per the schedule.
  • Software code and builds – well‑structured, secure, and tested code for each release or sprint. Package and deliver software increments (source code, binaries, configuration scripts) for each sprint/release, including hot‑fixes and patches.
  • Testing and quality assurance artifacts – automated test scripts and test results for each build (using tools like JUnit, Selenium, etc.), along with evidence of code quality and security scans (e.g., Fortify or SonarQube) for every build.
  • Technical documentation and release notes – up‑to‑date documentation such as release notes (detailing changes, version numbers, issue IDs addressed) and updated technical/design documents for the delivered software components. Ensure documentation meets client standards and facilitates knowledge transfer for future maintenance.