Senior Platform Engineer (m/f/x)

Job summary

The Senior Platform Engineer will design and own the identity, authorization, API, and integration backbone of a new domain-driven SaaS platform, including its multi-tenant model and connections to the established IPF platform. The role includes managing stable, versioned APIs documented in OpenAPI, building a database-backed event and messaging library using SQL, and creating compatibility layers between legacy and new modules. It also ensures access control and tenant isolation for AI features.

Benefits

Qualifications

• Degree in Computer Science, Engineering, or a related field, or equivalent practical experience
• Experience designing and operating authentication and authorization in production multi-tenant SaaS using standards such as OAuth 2.0 and OpenID Connect
• Experience designing fine-grained permission models, such as role-based or attribute-based access control
• Experience with API versioning, OpenAPI specifications, and backward compatibility
• Experience building event-driven systems and understanding delivery guarantees and patterns such as the transactional outbox
• Experience integrating legacy and new systems through translation layers or incremental replacement
• Strong backend engineering skills
• Ability to make architecture decisions under uncertainty and explain technical trade-offs clearly
• Fluent English; German is a plus

Responsibilities

• Own the identity and authorization model, including tenant, customer, organization, and role structures
• Manage stable, versioned platform APIs with OpenAPI documentation, service level agreements, and deprecation policies
• Build a database-backed event and messaging library that enables IPF to publish events through SQL and can later be replaced by a message bus
• Design the compatibility and translation layer between IPF and new modules
• Ensure access control and tenant isolation for AI features

Skills

Degrees

Languages

Work schedule

Industry

Relocation