Senior .NET/React Engineer

Jimmy Technologies; Turkey; On-site; TRY 5,593,000 - 8,389,000; Full time

Job summary

Jimmy Technologies seeks Senior FS Engineers to modernize a fleet management platform using .NET Core and React/TypeScript. You will work on backend and frontend in a microservices setup, with AI-assisted development tools and a consulting mindset to deliver scalable software.

This long-term remote-first contract requires US hours overlap (2-6 PM CET). Remote (99%) in Europe, with potential travel within Europe for workshops; experience with Azure cloud and modern deployment practices is

Qualifications

• Backend: .NET (Core), C#, ASP.NET Core, EF Core
• Frontend: React/Typescript, Microfrontends
• Databases: CosmosDB
• Testing & Debugging: xUnit/NUnit, Postman, Fiddler

Responsibilities

• Develop and maintain backend services using .NET, C# and React.
• Implement microfrontend architecture for scalability.
• Modernize and modularly decompose a large enterprise platform.
• Utilize Docker and Kubernetes for deployment and orchestration.
• Work with databases including MS SQL, NoSQL and Redis.
• Integrate authentication using OAuth2/JWT.
• Collaborate with DevOps to implement CI/CD pipelines.
• Apply OWASP security practices to prevent vulnerabilities.

Skills

.NET Core

C#

ASP.NET Core

Entity Framework Core

React/Typescript

Microfrontends

CosmosDB

xUnit/NUnit

Postman

Fiddler

Tools

Docker

Kubernetes

Azure

Azure DevOps

OAuth2/JWT

Job description

Our client, a Fortune 50 company, is seeking Senior FS Engineers with the main skills .NET Core and React/TypeScript to work onthe 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) .

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

Job Requirements

Core Technical Skills

• Backend: .NET (Core), C#, ASP.NET Core, Entity Framework Core
• Frontend: React/Typescript, Microfrontends
• Databases: CosmosDB
• 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
• 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 raise 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.
• Security best practices (OWASP, authentication standards).
• Design patterns and software architecture knowledge .