Cofinity-X GmbH

(Senior) Self Sovereign Identity and Wallets Engineer (m/f/x)

Köln, Germany full-time Mid Salary not listed
full-time Mid level Technology & IT Curated
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About the role

Our vision - your futureCofinity-X is a joint venture founded in 2023 by BASF, BMW Group, Henkel, Mercedes-Benz, SAP, Schaeffler, Siemens, T-Systems, Volkswagen, and ZF. Established by industry experts, our company is primed for growth and is intended to be further led by professionals like yourself.

Your missionDesign, develop, and maintain core backend services, with a focus on digital identity and wallet-related components
Implement and operate secure, standards-compliant wallet functionality (e.g. credential issuance, verification, and storage) within our platform
Ensure the reliability, scalability, and security of core services that other product components depend on
Collaborate with architects and product teams to translate technical and regulatory requirements (e.g. self-sovereign identity, decentralized identifiers, verifiable credentials) into robust implementations
Contribute to API design and integration patterns for wallet and identity-related services
Participate in code reviews, technical design discussions, and continuous improvement of engineering practices
Monitor, troubleshoot, and resolve issues in core services, ensuring high availability and data integrity
Stay current with relevant standards and specifications (e.g. Gaia-X, Catena-X, W3C DID/VC) and help shape their implementation through participation in working groups, expert groups and committees as required.

Your profileSeveral years of experience as a backend or software engineer in an agile development environment
Hands-on experience with identity and credential technologies such as SSI, DIDs, verifiable credentials, or digital wallets is a strong plus
Strong programming skills in (preferably) Java, or C# .NET
Solid understanding of cryptography fundamentals, secure API design, and data protection principles
Experience with cloud-native architectures, containerization (Docker/Kubernetes), and CI/CD pipelines
Familiarity with relevant standards bodies and specifications (e.g. Gaia-X, Catena-X) is beneficial
Analytical and structured working style with strong problem-solving skills and a collaborative, team-oriented mindset

Why us?Hybrid working model
Work-life balance with flexible working hours
Annual training budget for continuous professional and personal development (1.500 EUR)
Free choice of hardware
Monthly lunch subsidy (up to 115 EUR)
Deutschland Ticket and Job Bike for environmentally friendly mobility options
Workation to work remotely from different locations within the EU
We offer every employee a pensions scheme (bAV) with company sponsorship
Regular team events to strengthen cohesion and foster a positive working atmosphere
A modern office with an impressive view of the Cologne Cathedral

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Mid
Technology & IT API integration Project Management Senior Self Sovereign Mid level

Likely questions

  1. Tell us about work you have done that is close to the (Senior) Self Sovereign Identity and Wallets Engineer (m/f/x) role.
  2. How would you approach your first 30 days at Cofinity-X GmbH?
  3. Which of API integration, Project Management and Senior have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with API integration, Project Management and Senior.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the (Senior) Self Sovereign Identity and Wallets Engineer (m/f/x) role because I can bring practical experience in API integration, Project Management and Senior, learn the team quickly, and contribute to the outcomes Cofinity-X GmbH needs from this hire.

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