Senior .NET/React Engineer

Job description

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