. NET Fullstack Engineer (f/m/d)Energy trading moves fast, and the tools behind it need to keep up. Youll become the go-to person for a complex, business-critical application at the heart of Axpos energy trading operations. Youll start by working alongside external developers to deeply understand the system and its business logic, then progressively take ownership - delivering change requests, supporting users and driving technical improvements. Over time, youll modernize legacy logic into clean. NET code, improve test coverage and help evolve the frontend. This is hands-on, technical work on a real system with real users.Tasks and Responsibilities:- Learn, document and internalize application logic and business rules currently held by external developers.- Deliver change requests, bug fixes and small features to continuously add business value.- Provide L1/L2 support: assess and prioritize reported issues, diagnose root causes, implement fixes or workarounds.- Design and develop ASP.
NET Core APIs and background services.- Maintain and evolve the frontend (Angular).- Ensure quality through automated testing and solid CI/CD practices.- Collaborate with analysts, architects and engineers to plan and deliver iteratively.- Use AI-assisted tools (LLMs, Copilot) to accelerate development and refactoring.- Contribute to technical documentation and architectural decisions.- Over time, rearchitect and modernize application components, bringing business logic into clean, testable. NET code.Qualifications:Education:- University degree in Software Engineering or a quantitative subject.Professional Competencies:Must-have:- 5+ years of experience with C#/. NET (ASP. NET Core, RESTful APIs) strong OOP and clean code practices.- Solid SQL skills - comfortable working with complex queries, stored procedures and database logic.- Experience with Angular (v17+).- Experience with automated testing and CI/CD pipelines (Azure Dev Ops or Git Hub Actions).- Effective use of AI coding assis