KOTLIN BACKEND DEVELOPER (M/F/D) for the EUDI Wallet Infrastructure project of SPRIND

We are looking for people who want to shape the future with us. As part of SPRIND an organization that is called the Federal Agency for Breakthrough Innovations but thinks like a startup. Our goal is to create new breakthrough innovations from Germany. That means products services and systems that make all of our lives noticeably and sustainably better. To do this we connect new thinkers from science and business people with outstanding ideas special expertise and passion.

In the EUDI Wallet Infrastructure project which SPRIND is carrying out on behalf of the Federal Ministry of the Interior and Community (BMI) a concept for a German overall system for the implementation of the eIDAS 2.0 regulation including a digital wallet is being developed and tested. Representatives of organized civil society business associations and administration as well as experts from science are involved in a public consultation process that accompanies the project. As a backend developer you will be an important part in the Wallet Product team realizing this project.

Join a multidisciplinary team shaping the future of secure digital identity in Europe. Youll play a key role in designing and building the backend architecture of a hightrust digital wallet solution used across regulated privacysensitive domains.

SHAPE THE FUTURE WITH US AS BACKEND DEVELOPER (M/F/D)

FULLTIME REMOTE (occasional visits to Berlin/Leipzig/Frankfurt) limited until December 2026.

Tasks

• Contribute to the architecture and implementation of the wallets backend services including: Remote trust anchor (Cloud HSM) integration Wallet and Credential lifecycle Vulnerability management System telemetry and statistics
• Design and implement secure scalable and reliable backend components focusing on quality and resilience.
• Develop and maintain test suites across system levels including functional load and performance testing.
• Evaluate and evolve existing components replacing or refining them where needed to meet new security and scalability requirements.
• Collaborate closely with mobile/backend developers security engineers and architects in an agile international team working across German and EU government bodies and supporting organizations.
• Contribute to concise and clear technical documentation for internal processes certification efforts and public specifications.

Requirements

• Proven ability to deliver value in highstakes regulated environments with a strong focus on backend systems that prioritize security scalability and compliance
• 10 years of backend development experience including 3 years of Kotlin designing and building robust scalable and secure REST APIs
• Deep knowledge of modern cryptography secure protocol implementation and identity management standards (e.g. OAuth2 OpenID Connect Verifiable Credentials)
• Strong security mindset with handson experience building and reviewing securitysensitive applications conducting threat modeling and mitigating common web/API vulnerabilities
• Skilled in relational database design and SQL query optimization ensuring performance and reliability under high load and complex transactional scenarios
• Experienced with scalability planning load testing and backend analytics enabling insightdriven performance tuning and operational resilience
• Active contributor to the open source communities including leadership in public technical discussions issue triage and contribution to standardization efforts
• Comfortable working in DevOps environments collaborating closely with ops teams to improve infrastructure deployment pipelines and observability across environments
• Excellent communicator able to bridge the gap between technical depth and practical decisionmaking whether through design docs code or team discussions

Bonus Skills:

• Experience with Digital Credentials / OpenID / OAuth / Verifiable Credentials
• Knowledge of Hardware Security Modules (HSMs) and cryptographic key management
• Familiarity with device attestation mechanisms like Play Integrity and iOS DeviceCheck
• Handson experience with DevOps CI/CD pipelines and cloudnative operations

Benefits

• The attractive remuneration is based on the responsibility of the position
• Flexible working hours and remote work options
• Access to conferences team events and a supportive work culture.

Would you like to help develop our EUDI Wallet Infrastructure project We look forward to receiving your application.