Backend-Entwickler (m/w/d) – FIS
Core
Building and refactoring backend services for industrial automation and IT solutions in buildings, energy, and environmental sectors.
Role type
Senior .NET backend engineer (API & microservices)
Builds
Modular, containerized backend services with REST APIs, deployed in cloud and on-premise for industrial clients.
Domain
Industrial automation, building technology, energy, and environmental engineering.
Required skills
C#, ASP.NET Core, SQL, data modeling, performance optimization, legacy code refactoring, API design, OpenAPI, OAuth2/OIDC, containerization, CI/CD.
Preferred skills
Domain-Driven Design, Anti-Corruption Layer, API Gateway (Kong, Azure API Management), WebSockets/SignalR, OPC UA, BACnet, Modbus, SCADA, AI tooling.
Responsibilities
Designing and maintaining API-first architecture with versioning and authentication; refactoring monolithic codebases into independent services; ensuring data access performance and operational stability; implementing real-time processing capabilities.
Seniority
Senior, hands-on IC