Stellenbeschreibung
We are looking for Senior Backend Software Engineer for a project in the energy sector.
Your role will focus on developing and integrating robust backend solutions for grid stability assessment and network security analysis systems using Python (80%) and C# (20%).
Project Highlights
Duration : May 1 – December 31, 2026 (175 days, with optional extension)
Work Mode : 95% remote with minimal on-site visits (Berlin area)
Contract Type : Freelance Service Contract
Environment : Agile (Scrum) team with access to cutting-edge grid technology infrastructure
What You'll Be Doing
-Develop and maintain backend components for Dynamic Stability Assessment and Static Network Security Calculations
-Implement real-time and near-real-time network security analytics
-Ensure production quality, stability, security, and automated testing
-Collaborate with domain experts to translate complex requirements into robust technical solutions
-Support system rollout, documentation, and knowledge transfer
Required Skills
We are looking for candidates with:
-5+ years of professional backend development experience
-4+ years hands-on Python development in production environments
-1+ years practical experience with modern .NET / C#
-Strong Kafka expertise (core to the architecture)
-Experience with FastAPI, pytest, pydantic, protobuf
-.NET 8.0+, Microsoft.NET.Test.Sdk, NSwag
-Proven ability to design and maintain OpenAPI-compliant APIs
-Experience with JSON, XML, Protobuf data formats
-OpenTelemetry implementation experience
-S3 Storage experience (preferably Ceph)
Nice-to-Have
Experience with microservices, Kubernetes, Helm Charts, PostgreSQL, or power systems engineering (grid modeling, SCADA, network analysis) would be a significant advantage.