React/.NET API Integration Developer with DOTNET experience to develop backend

@talhaamin

I can fully design and implement your .NET 6+ back-end from the ground up with clean architecture, secure authentication, role-based authorization, and a scalable REST API layer tailored for your existing React front end. My approach would use JWT-based auth with refresh tokens, Entity Framework Core with SQL Server (or SQLite for lighter deployments), and a strict separation of controllers, services, and data access for long-term maintainability. I’ll integrate all third-party, internal, and custom APIs with proper resilience using retry, timeout, and circuit-breaker policies, then wire everything cleanly into your React state flow with solid error handling. You’ll receive a complete tested .NET solution, production-ready API wrappers, updated React integration, and a clear README for setup and deployment. If you’d like, I can start by reviewing your current React and Figma to align the API contracts immediately.

@QutubHaider

Dear Sir, IT CAN BE DONE & WE HAVE DONE THIS TYPE OF PROJECT AND WILL BE DONE AT YOUR BUDGET You recently advertised your job posting on this website, we have worked on more than 200 computer software, websites/web portals with required API /B2B integrations, and Mobile apps. (ios&android), Betting Bot(odd/even), mobile games. We have more than 200 satisfied clients. Our skill sets:c/c++/c#/Jsp/Asp.Net/PHP/WP/Python/Pearl/swift/android studio/xamrin/react j/native etc. SCOPE of your work: React/.NET API Integration Developer I WOULD LIKE TO DISCUSS THE PROJECT IN CHAT/ CALL. WE HAVE THE VOICE CALL FACILITY ON FREELANCER. SO IF YOU SEND ME A MESSAGE ON FREELANCER WE WILL HAVE A CALL/CHAT THERE. BUT IT IS MANDATORY THAT YOU INITIATE THE CHAT FIRST SO THAT I CAN REPLY AS PER FREELANCER RULES. Warm Regards, Qutub Haider

@sakshitiwari2323

➡️Pleasured to connect with you, I’ll build your complete .NET backend from the ground up and wire it seamlessly to your existing React front end. The REST layer will be secure, well-structured and versioned—handling auth, data storage, business logic and all required API integrations while keeping the UX fully aligned with your Figma designs. ✅ My Optimisation Approach ✔ Full .NET Core backend + clean REST endpoints ➲ Auth + role-based access ➲ SQL Server / lightweight DB integration ➲ Service-layer business logic ➲ Third-party & internal API wrappers ✅ Tech Stack & Tools ➲ .NET Core 6+, C# ➲ SQL Server / alternatives ➲ React endpoint integration ➲ Robust retry/timeout policies ➱➱ Let’s launch your React + .NET platform—secure, scalable and fully API-integrated. Warm Regards, ~Sakshi.S.

@mkh559a5a1fd66e9

Over my career spanning more than a decade, I’ve consistently delivered top-of-the-line full-stack solutions, just like what your project demands. With a comprehensive understanding of .NET, C#, SQL, and React, I bring to the table a unique blend of skills that match your requirement perfectly. My proficiency in juggling complex integrations and untangling intricate webs will be invaluable in navigating through your three-category API integration challenge. Having worked on applications with robust user authentication and role-based authorization systems, I am well-versed in implementing secure and structured REST layers that fully meet your expectations. My familiarity with various third-party APIs would enable smooth connection and interaction with each one, regardless of their authentication schemes, rate limits, and payload formats. Not only will I design and implement the .NET back-end for you but also integrate it impeccably with the existing React components. Throughout my career, I have insisted on maintaining high coding standards; my clean and concise approach can be seen in the deliverables you can expect from me, including complete .NET solutions, unit tests following clear project structure, integrated API wrappers with sensible retry / timeout policies and updated React code consuming the new endpoints.

@saurabhrathi31

Hi, I have 9+ years of experience in .Net technology and developed many web and api application. Kindly let me know if we can discuss about my work and your requirement and finalize it. Many thanks

@NehalSK

Having an academic background in IT alongside my valuable experience as a Software Developer intern working with technologies like React and Node JS gives me a unique edge for this project. I have trained for projects like yours, managing complex integrations and handling untimed situations. This makes me the perfect fit for the job. In our collaboration, I will design and implement a secure RESTful API with .NET (Core 6 or later) that will be able to handle third-party, internal, and custom-built services API integration efficiently. Alongside, I will provide clean, versioned endpoints that will meticulously take care of user authentication, role-based authorization, data storage/retrieval (SQL Server or lightweight alternative), and all business logics behind neat service interfaces. Maintaining reliability is key, thus I will also provide integrated wrappers for your time-sensitive APIs with sensible retry/timeout policies and make sure it harmonizes well with the existing React components for top UX. For your specific deliverables request, be assured I not only enthusiastically share my approach towards authorizations, the best-suited data layer for your project and also how we can incorporate resilience in our API integration strategy. My solutions are always backed up by robust unit tests and a clear project structure. Providing you with an efficient backend solution within agreed timelines is my utmost priority. Let's get started!

@realdevo

Hi Logical, I’ll build the missing .NET back end and wire it into your React front end so the app matches the Figma designs and behaves reliably under real-world API conditions. I prefer using .NET 6+ Web API with EF Core for data, a clean service/repository boundary for business logic, and policy-based JWT auth so role checks are explicit and testable; API wrappers will use HttpClientFactory with Polly-based retry and timeout policies to handle upstream rate limits gracefully. I’ll expose versioned, well-documented endpoints (Swagger) and deliver unit tests, sample integration tests, and a short README showing env variables, local run steps, and the CI/deploy hints you’ll need. On the React side I’ll add the small adapters needed to consume the new endpoints (token refresh flow, error handling and CORS-safe requests) so the UI behaves exactly like the Figma flows. If that sounds good, share the repo access, Figma links and the three API specs and I’ll propose a brief milestone plan and ETA. Best regards James Walker

@hinakshatriya

I am excited to apply for the opportunity to build out the .NET back-end for your application. With a strong background in developing secure and efficient server-side solutions, I am confident in my ability to transform your existing React codebase into a fully integrated, reliable application. For this project, I will design and implement the server side using .NET Core 6, ensuring a well-structured REST layer that seamlessly connects with your React client. Deliverables will include: A complete .NET solution with unit tests and a clear project structure. Integrated API wrappers with sensible retry and timeout policies. Updated React code that consumes the new endpoints. A concise README detailing setup, environment variables, and deployment steps. I am eager to discuss my preferred approaches to authentication, data layers, and API resilience to ensure we can kick off the project quickly and effectively. Thank you for considering my application. I look forward to the opportunity to contribute to your project's success. Best regards,

@sumitwebrainbows

With my extensive 14 years of experience specialising in web application development and cross-platform integration using .NET Core and React, I am perfectly positioned to handle your project. I have an innate understanding of the intricacies involved in building secure RESTful APIs, authentication mechanisms, and authorization layers - aspects at the core of your project. I am skilled at designing well-structured REST layers that can effortlessly handle multiple API integrations- be it third-party, internal or custom. My deep knowledgebase in juggling different authentication schemes, rate limits and payload formats will prove invaluable for your project ensuring seamless connectivity across diverse systems. Furthermore, my proficiency in SQL Server and other lightweight alternatives will be instrumental in facilitating fast and reliable data storage and retrieval resulting in a smooth end-to-end user experience. I am known for meticulously architecting my projects with comprehensive unit tests along with clearly defined structures

@dushyant317

I bring 13 years of professional experience delivering high-quality results. I have strong expertise in all the required skills listed for this project. My approach ensures accuracy, clear communication, and timely delivery. I am confident I can exceed your expectations with efficient, reliable work. Looking forward to contributing to your project—ready to begin immediately.

@guptasakshi2022

Hi, I’ve built several React + .NET systems from the ground up, including projects that required multiple API integrations and structured service layers, so your setup is very familiar. I can take the existing React/Figma work and deliver a clean, well-organized .NET 6+ REST backend with proper authentication, role policies, and a service-based architecture. I’m comfortable working with SQL Server or a lighter option and can set up retry/timeout logic for third-party and internal API calls. What you can expect: Clear .NET solution with unit tests Robust API wrappers with resilience patterns A simple README for setup + deployment Happy to walk you through my usual approach to auth, data access, and API resilience if you’d like to discuss next steps. let me know If You are interested

@debasisit95

Hi Sir/Ma'am, I am Debasis, a part-time individual freelancer from Bengaluru, would like to work on this assignment. As per my understanding, the requirement is to develop back-end API (in .Net 6/8/10) required for the application. I have over 8 years of experience in Microsoft.Net REST API, Entity Framework, Clean architecture (with MSSQL Server as the the backend) and I will be able to deliver in 7-10 days timeframe. I would also like to have TDD framework if you prefer. Please let me know if we can talk on this in detail. Thanks, Deb.

@uniqedeveloper

Hi, I’ve shipped multiple React + .NET Core apps where the frontend was already designed and the real work was building a clean, secure REST layer from scratch. One recent project was almost identical—.NET 6 API, SQL Server, JWT-based auth, multiple third-party integrations with different auth schemes, and a React client consuming all endpoints. For your build, I can structure the .NET solution with proper layering (Controllers → Services → Repos), add role-based authorization, and set up a resilient API integration layer with retry/timeout policies. I’ll expose clean, versioned endpoints and update the existing React components to consume them without breaking your Figma-driven UX. Deliverables will include unit-tested .NET code, integrated API wrappers, updated React calls, and a clear README for setup and deployment. I can start immediately once you share the API list and environment details. Let's get in touch Thanks

@zaheermoe

Hi logicallearning, I understand the importance of building a robust .NET back-end that seamlessly integrates with multiple APIs for your application. With my experience in developing secure RESTful APIs and handling different authentication schemes, I am confident in designing and implementing the server-side logic efficiently. My skills in .NET development, API integration, and ensuring data security make me a great fit for this project. You can check out my portfolio [portfolio link] for similar projects. One initiative I would suggest is implementing JWT token-based authentication to ensure secure user access to endpoints. Let's discuss your preferred approach further and get started right away. Looking forward to working with you, Zaheer Mahomed

@bonifacedn

Good morning , How are you? I hope this proposal finds you well. I have checked your project (React/.NET API Integration Developer), which lies in the field of my certification & experience. This is to inform you that I have KEENLY gone through your project description, CLEARLY understood all the project requirements as instructed in your project proposal and this is to let you know that I will perfectly deliver as desired. Being in possession of all stated required skills like; .NET 5.0/6, .NET Core, Microsoft SQL Server, API Development, C# Programming, .NET, ASP.NET and RESTful:, as this is my field of professional specialization having completed all certifications and developed adequate experience in the respective field, I hereby humbly request you to consider my bid for professional, quality and affordable services that meet all your requirements. I always guarantee timely delivery and unlimited revisions where necessary hence you are assured of utmost satisfaction when working with me. Please send me a message so that we can discuss more and seal the project. WELCOME.

@jrishabh055

I have extensive experience building secure, scalable .NET Core APIs and integrating them with React front-end applications. I’ll ensure smooth user authentication, role-based authorization, and robust API interactions with proper retry mechanisms. My approach includes clean project structure, comprehensive unit tests, and seamless integration with your existing React components. Let’s discuss your preferred tech stack and start transforming your backend

@modesorehari6

Hello — I’m Malix Azis, and I can design and implement the .NET Core backend your React app needs, delivering a secure, maintainable REST layer that your front-end can depend on.✨ I’ll build a clear project structure (controllers, services, repositories, DTOs), implement JWT-based authentication with role-based authorization, and create versioned endpoints that encapsulate business logic behind service interfaces so the surface API remains stable as features grow.⚙️ For the data layer I favor Entity Framework Core on SQL Server (or a hosted lightweight alternative if you prefer) with transactional safety and careful indexing; I’ll include repository patterns, unit tests for critical flows, and integration tests for the main API contracts.⭐ I’ll also wrap third-party integrations with resilient HTTP clients (policy-driven retries, timeouts, and backoff), centralized logging/observability, and a secure secrets/ENV strategy for different environments. ✨ To scope the integrations precisely, could you list the three external API categories and any nonstandard auth schemes (OAuth, API key, HMAC) you expect me to support so I can plan wrappers and retry policies?⚙️ I’ll produce the full .NET solution, tests, integrated React changes, and a concise README plus deployment notes—looking forward to getting started and making the back end rock-solid. Have a great day! ⭐

@devorix

I can build your complete .NET backend and connect it seamlessly to your existing React front end and Figma designs. My approach is to create a clean, secure, and scalable API layer using .NET 6+ with well-structured services, controllers, and data interfaces. I’ll implement JWT authentication with role-based authorization, a robust data layer using EF Core (or Dapper if preferred), and clear versioned REST endpoints that your React app can rely on. For your third-party, internal, and custom APIs, I’ll create typed HttpClient wrappers with proper retry, timeout, and error-handling policies so the integrations stay stable under real usage. All business logic will remain behind service interfaces to keep the architecture testable and easy to extend. On the front end, I’ll connect all new endpoints to your React components, ensuring state management, loading flows, and error handling match your Figma UX. I’ll also document every API call and include a full README with environment variables, setup steps, and deployment instructions. Deliverables include: • Complete .NET backend with clean architecture • Auth, data storage, business logic, and API integrations • Updated React code consuming the endpoints • Unit tests and Swagger documentation

@bchemeda

I’d love to help you bring the back-end of your application to life. You already have solid React components and polished Figma designs—now what you need is a .NET back-end that’s clean, secure, and dependable. That’s exactly the kind of work I specialize in. I’ll build a well-structured, fully versioned REST API in .NET 6+, complete with authentication, role-based authorization, and a robust data layer using SQL Server or a lightweight alternative if that suits your architecture better. All business logic will be cleanly separated behind services so the system stays easy to maintain and scale. Since your project involves integrating multiple types of APIs—third-party, internal, and custom—I’ll make sure each integration is handled with proper auth flows, rate-limit safeguards, and smart retry/timeout logic. Once the back-end is solid, I’ll connect your React front-end to the new endpoints, keeping the UX aligned with your Figma designs and ensuring smooth state management and friendly error handling. You’ll get a clean .NET solution with unit tests, organized folders, reusable API wrappers, and a clear README covering setup and deployment. I’ve delivered several React + .NET platforms with similar API complexity, so I can jump in quickly and start shaping your back-end into something reliable and production-ready. Let me know your preferred approach for auth and data persistence, and I’ll tailor the architecture to match your vision.