Hire the Best .NET Framework C# Engineers
in France

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Naveed R.

Aulnay-sous-Bois, France

$30/hr
5.0
5 jobs

Looking to elevate your web applications or ERP systems? As a Full-Stack .NET Developer, I specialize in building scalable, high-performance solutions that drive results. With 7+ years of experience, I bring your vision to life through robust, maintainable code, intuitive user interfaces, and seamless integrations, all while optimizing for speed and efficiency. Here’s what I offer: Custom .NET Development – Tailored solutions using ASP.NET MVC, C#, and Entity Framework ERP System Expertise – Custom modules, reporting, and workflow automation to streamline business operations Performance Optimization – Fast, efficient code with caching, server tuning, and database optimization Cross-Platform Mobile Apps – React Native for building mobile solutions alongside web applications Let’s work together to create solutions that drive your business forward!

  • .NET Framework
  • C#
  • ASP.NET MVC
  • Entity Framework
  • Microsoft SQL Server
  • Desktop Application
  • API Integration
  • LINQ
  • Object-Oriented Programming
  • Web Application
  • Entity Relationship Diagram
  • Performance Optimization
  • Agile Software Development
  • Version Control
  • ASP.NET Web API
Konstantin S.

Pau, France

$60/hr
4.8
44 jobs

Hello! I’m a CTO, Senior .NET Core Developer, AI Developer, and AI Agent Developer with 20+ years of experience in enterprise software engineering, cloud architecture, SaaS development, distributed systems, and AI Development. I have delivered 150+ AI projects, launched my own production AI products, and created the Managed Code Coding AI Framework (MCAF) — a structured framework for applying AI across the software development lifecycle while preserving engineering quality, governance, security, and predictable delivery. My work combines advanced AI Development with deep expertise in C#, .NET Core, Microsoft Azure, Orleans, enterprise architecture, and operational automation. What I Build • AI agents and multi-agent systems • AI chatbots, copilots, and intelligent assistants • OpenAI- and Claude-powered applications • RAG and enterprise knowledge systems • AI SaaS products and internal platforms • Workflow and business process automation • Scalable .NET APIs and distributed cloud systems • AI integration for existing and legacy software I work as an AI Developer, AI Software Developer, AI Chatbot Developer, AI App Developer, OpenAI Developer, Claude Developer, and AI Agent Developer. AI Agent Architecture I specialize in the systems layer that transforms an LLM into a reliable production-grade agent. My expertise includes: • Agent harness architecture • Execution, reasoning, and control loops • Multi-agent orchestration • Tool calling and task delegation • Context, memory, and state management • Guardrails, governance, and access control • Human-in-the-loop approval workflows • Validation, retries, fallbacks, and recovery • Agent evaluation, tracing, and observability An effective AI agent is not simply a model connected to an interface. It requires a complete operational architecture around the model: tools, permissions, memory, business rules, execution control, monitoring, and failure handling. Managed Code Coding AI Framework I created the Managed Code Coding AI Framework (MCAF) to help engineering teams adopt AI in a controlled, measurable, and scalable way. MCAF provides a structured approach to: • Integrate AI into software delivery workflows • Improve developer productivity without reducing code quality • Introduce governance and validation into AI-assisted development • Standardize how teams use AI across analysis, coding, testing, and documentation • Reduce delivery time and repetitive engineering work • Preserve security, maintainability, and architectural consistency The framework is designed for organizations that need more than isolated AI tools. It helps transform AI usage into a repeatable engineering capability. Business Value My objective is not to add AI for its own sake. I design systems that create measurable operational and financial value. Depending on the process, my solutions can: • Reduce manual workflow steps by 40–80% • Convert hours of repetitive work into minutes • Reduce AI and token costs by 30–70% • Improve system reliability through validation and fallback logic • Accelerate product delivery and internal decision-making • Increase process consistency and reduce human error • Extend existing teams without proportional headcount growth I focus on the full cost of ownership, not only initial development. This includes model usage, infrastructure, maintenance, observability, security, and long-term scalability. AI Cost Optimization I optimize AI systems through: • Model routing • Semantic and response caching • Prompt and context optimization • Selective retrieval • Context compression • Token budgeting • Structured outputs • Small-model and large-model escalation • Usage monitoring and cost controls This allows companies to maintain response quality while reducing unnecessary token usage, latency, and infrastructure expenses. Core Technologies C#, .NET Core, ASP.NET Core, Microsoft Azure, Azure OpenAI, OpenAI API, Claude API, Orleans, Aspire, RAG, vector and hybrid search, REST APIs, microservices, Docker, Kubernetes, DevOps, CI/CD, and MCAF. I can take a project from discovery and architecture to implementation, deployment, optimization, and long-term support—whether the goal is to build a new AI product, modernize an enterprise platform, introduce AI-assisted development, or automate complex business operations.

  • C#
  • Artificial Intelligence
  • Machine Learning
  • Python
  • Computer Vision
  • Natural Language Processing
  • Deep Learning
  • ASP.NET
  • Artificial Neural Network
  • Retrieval Augmented Generation
  • Data Analysis
  • Microsoft Azure
  • API Integration
  • AI Model Integration
  • JavaScript
  • Neural Network
  • Data Science
  • Solution Architecture
  • AI Agent Development
  • Rust
Muhammad Haseeb T.

Paris, France

$30/hr
5.0
22 jobs

Thank you for considering my profile. I’m a passionate and pragmatic software engineer with 7 years of professional experience, specializing in full-stack development and App development using Microsoft technologies on the backend and JavaScript framework on front-ent. Strong in object-oriented analysis and design and experience with a wide range of front-end and back-end frameworks (see below). Also, being an artist in nature, I have a good sense of design, colors, and usability and can build beautiful and modern interfaces that people love. I can assist in all stages of the software development lifecycle and deliver working software with clean architecture, clean code, and automated tests. I have been working remotely on Upwork for more than 2 year, and within less than a year, I am top rated with 100 percent Job Success Score. ✔ If you never try, you'll never know ✔ I love to convert user requirements into working functionality. ✔ Let's get started. I have experience in different areas of programming and tools. ✔ Server-side apps (Asp.net core, NodeJS) ✔ SPA (Angular, React/Redux) ✔ App development (Xamarin Forms, React-Native) ✔ Unit testing and Integration testing ✔ Cross-platform Xamarin (C#, .NET) apps, ✔ Cross-platform React-Native apps, ✔ Architecture ✔ HTML/CSS ✔ Bootstrap ✔ Support and Maintenance Best regards

  • ASP.NET Web API
  • Entity Framework
  • SQL
  • React
  • NestJS
  • .NET Core
  • Mobile App Development
  • Angular
  • TypeScript
  • Redux
  • Bootstrap
  • ASP.NET Core
  • JavaScript
  • React Native
  • Xamarin
  • Microsoft SQL Server
Reda H.

Paris, France

$10/hr
5.0
4 jobs

I am an experienced Software Engineer and Agility Coach with a strong background in full-stack development and collaboration with international teams on complex, multi-domain projects spanning E-commerce, public organizations, telecommunications, ERP, and more. I actively contribute to designing and building scalable products using diverse technologies. With an open mind, agility, and a deep understanding of software testing, I prioritize quality and efficiency, ensuring robust and reliable solutions. technologies: c#, .net, typescript, react, html, css, javascript, python, SQL, docker, APIs, jenkins, CI/CD, Git, jira, redmine.

  • .NET Framework
  • Script
  • Web Development
  • Ecommerce Website
  • API Development
  • .NET Core
  • React
  • Microsoft SQL Server
  • TypeScript
  • Python
  • Java
  • CSS
  • Back-End Development
  • Front-End Development
  • Database
Hassani M.

Garches, France

$45/hr
5.0
1 jobs

I’m a Full Stack Software Engineer with over 8 years of hands-on experience delivering enterprise-grade, secure, and scalable web and mobile solutions. I specialize in .NET (Core, 6, 7, 8), Angular, Azure, DevOps pipelines, SQL Server, PostgreSQL, and Flutter for mobile. I’ve built and delivered systems for leading banks and multinational corporations, including: 🏦 CIH Bank (Morocco) – financial service applications, secure APIs, and automation systems. 🏦 Société Générale (France) – scalable backend systems and microservices for financial operations. 🏦 AXA (France) – insurance automation, data integration, and cloud modernization. 🏦 Natixis (France) – internal banking tools and data management platforms. 🚗 Nissan (UK) – production and logistics-related applications. I’ve also worked with multiple startups and B2C clients, helping them go from idea to live MVPs in record time. ⚙️ My Core Technical Stack 🔹 Backend Development .NET 6 / 7 / 8, ASP.NET Core, C#, Entity Framework Core RESTful APIs, gRPC, Microservices, WebSockets Domain-Driven Design (DDD), CQRS, Clean Architecture Authentication & Authorization (JWT, OAuth2, Azure AD) Background services, scheduled jobs, and event-driven systems 🔹 Frontend Development Angular (v10+), TypeScript, RxJS, TailwindCSS, Material Design Reactive state management and component-driven architecture REST API integration, modular routing, lazy loading, performance optimization 🔹 Cloud & DevOps Azure App Services, Azure Functions, Azure SQL, Blob Storage Azure DevOps CI/CD Pipelines, GitHub Actions, Docker, Kubernetes Infrastructure as Code (IaC), ARM templates, Terraform basics Application monitoring, logging, and deployment automation 🔹 Databases SQL Server, PostgreSQL, Azure SQL Database design, optimization, indexing, complex queries, stored procedures Data migrations, backup & restore strategies, replication 🔹 Mobile Development Flutter cross-platform development (iOS & Android) Riverpod state management, in-app purchases, Firebase integration Subscription systems, onboarding workflows, offline support with SQLite 🚀 My Work Philosophy – Ship Fast, Ship Smart I focus on delivering results quickly and efficiently without compromising code quality or scalability. I apply a "Ship Fast" methodology for MVPs: short development cycles, fast iterations, and production-ready code within weeks. For larger projects, I lead with Agile/Scrum principles: Sprint planning, backlog prioritization, and roadmap management Team coordination (devs, QA, designers, PMs) Code reviews, CI/CD automation, and continuous improvement Whether you need a solo full-stack developer or a technical lead to guide your team through an enterprise project, I can help you achieve predictable, scalable delivery. 🧠 Why Clients Hire Me Bank-Grade Reliability: Years of experience with financial institutions where security, compliance, and uptime matter most. Technical Depth + Management Experience: I can code, architect, and manage — ensuring the entire project stays on track. MVP to Scale: I’ve helped startups and established businesses launch new digital products in record time. Clean, Maintainable Code: SOLID principles, modular architecture, and best DevOps practices built into every delivery. End-to-End Ownership: From planning, design, and development to deployment and maintenance — I handle it all. 💬 What You Can Expect When Working With Me ✅ Transparent communication — daily or weekly updates, clear timelines, and total visibility. ✅ Fast and reliable delivery — I don’t just promise, I deliver production-ready results. ✅ Long-term mindset — I build systems designed to evolve, scale, and perform over time. ✅ Collaboration — I can work independently or manage and mentor a small development team. ✅ Full technical documentation and deployment guidance provided at every stage. 🧩 Industries I’ve Worked In Banking & Financial Services Insurance Automotive Healthcare SaaS & Subscription-based Apps Education & Learning Platforms Retail & B2C Mobile Solutions 🧰 Key Strengths End-to-end product development (Web + Mobile + Cloud) Scalable architecture for high-traffic systems Cross-platform development (Flutter + Web APIs) Azure cloud deployment, monitoring, and cost optimization SQL performance tuning and data consistency Leading teams through modern Agile and DevOps processes 🌍 Let’s Build Something Impactful If you’re looking for a reliable full-stack engineer who can design, implement, and deploy robust systems — and who understands what quality and delivery really mean — I’d love to collaborate. I can: Architect and build secure .NET & Angular platforms Integrate complex APIs and databases Launch Flutter mobile apps with subscription models Set up CI/CD pipelines and cloud infrastructure Manage a development team and ensure on-time delivery 📩 Let’s discuss your project. Whether it’s a large enterprise platform or a startup MVP

  • C#
  • .NET Core
  • Angular
  • Azure DevOps
  • Clean Architecture
  • Domain-Driven Design
  • SQL
  • PostgreSQL
  • Agile Software Development
  • Microsoft Azure
  • ASP.NET Web API
  • Authorize.Net
  • TCP/IP
  • GraphQL
  • Microservice
M-Waseem A.

Nantes, France

$20/hr
4.9
22 jobs

I have proficiency in Embedded Systems, and Artificial Intelligence (Machine Learning & Data Mining). Contact me for freelancing projects or consultation!

  • .NET Framework
  • C#
  • Arduino
  • C++
  • Python
  • JavaScript
  • HTML
  • React
  • CSS
  • .NET Core
  • MVC Framework
  • Microservice
  • Angular
  • AngularJS
  • SQL

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