Senior .NET/React Engineer

Our client, a Fortune 50 company, is seeking Senior FS Engineers with the main skill .NET Core and React/TypeScript to work on the modernization of the fleet management platform. The client wants engineers with experience using AI-assisted development tools in practice. The ideal candidate will have a consulting approach and engineering mindset. You will be responsible for developing and optimizing backend and frontend in a microservices-based architecture. You will work closely with cross-functional teams to ensure high-quality software delivery. This is a long-term remote-first contract position with a required overlap of US working hours (2-6 PM CET) . Role & Responsibilities As an FS Developer , you will: • Develop and maintain backend services using .NET, C# and React . • Implement microfrontend architecture , ensuring scalability and reliability. • Modernize and modularly decompose a large enterprise platform. • Utilize containerization technologies like Docker and Kubernetes for deployment and orchestration. • Work with databases including MS SQL, NoSQL, and Redis for efficient data storage and retrieval. • Integrate authentication mechanisms using OAuth2 and JWT . • Collaborate with DevOps teams to implement CI/CD pipelines and ensure smooth deployments. • Apply security best practices , following OWASP guidelines to prevent vulnerabilities like SQL Injection (SQLi), Cross-Site Scripting (XSS), and Cross-Site Request Forgery (CSRF). • Utilize Azure services , such as AppService, Service Bus, Functions, and SQL Database , for cloud-based hosting and scaling. Work Conditions • Type: Full-time & Long-term contract work • Start Date : ASAP • Location : Remote (99%) in Europe; must be able to travel freely within Europe for workshops. • US Time Zone Overlap : Required ( 2 PM - 6 PM CET ) • Contract with European LLC Requirements Core Technical Skills • Backend : .NET (Core), C#, Core, Entity Framework Core • Frontend : React/Typescript, Microfrontends • Architecture : Microservices, CQRS, Dependency Injection • Databases : CosmosDB • Cloud & DevOps : Azure (AppService, Functions, Service Bus, SQL Database), Docker, Kubernetes, GitHub, CI/CD • Testing & Debugging : xUnit/NUnit, Profiling tools, Static code analysis, Postman, Fiddler AI Engineering Assistants Fluency The candidate must demonstrate practical experience using AI-assisted engineering tools, such as: • Cursor • Claude Code • GitHub Copilot or equivalent tools Soft Skills • Strong analytical and problem-solving skills , with the ability to diagnose and resolve complex issues under pressure. • Excellent communication skills , capable of explaining technical concepts to both technical and non-technical stakeholders. • Ownership mindset – the ability to work independently and as part of a team while taking full responsibility for assigned tasks. • Proactive attitude – the ability to escalate issues early, follow up on blockers, and support teammates when needed. • Constructive feedback approach – ability to receive and provide feedback in a way that improves overall team performance. Preferred Experience • Azure DevOps for continuous integration and deployment. • AI Development experience • Security best practices (OWASP, authentication standards). • Design patterns and software architecture knowledge . Highlights If you are passionate about building enterprise apps with a modern tech stack and enjoy working in a collaborative, fast-paced environment, this opportunity with our client is perfect for you. Originally posted on Himalayas