Full Stack Engineer

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Python, .NET, C# Programming, Django, NoSQL Couch & Mongo, Amazon Web Services, PostgreSQL, Docker, FastAPI, OpenAI and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@techplusintl

Hi, ★★★ C# / React Expert ★★★ 4+ Years of Experience ★★★ I can develop robust applications with C# and React, ensuring seamless integration and performance. This will include: - Building scalable applications using C# and .NET. - Implementing responsive UI with React. I will handle the work using a structured approach, focusing on best practices and efficient coding standards. Ready to start once you provide access to the existing architecture or any specific requirements. Thanks!

@brayanstiven5

Hi, I came across your post and would be interested in connecting. I'm a Senior Full Stack Developer with 7+ years of experience, specializing in C#/.NET, React, TypeScript, SQL Server, PostgreSQL, and cloud-based applications. I also have experience building AI-powered solutions, including integrations with OpenAI APIs, RAG workflows, document processing systems, and automation platforms. I'd be happy to discuss your current projects and explore potential collaboration opportunities. Please let me know a convenient time to connect. Best regards, Brayan Stiven Arias Henao

@ykarora26

With a deep background in Full Stack Engineering encompassing C#, React, TypeScript, and AWS, I'm well-equipped to tackle your project's diverse tech stack. Could you share more about the specific AI applications you envision integrating with OpenAI and LangChain? Regards, Yogesh Kumar

@toriquldev123

Hello dear, Greetings from Md. Toriqul Islam! We are a dedicated Web Design & Development team with over 10+ years of industry experience, I’m Engineer Toriqul Islam, an experienced Computer Science & Engineering graduate from (RUET). We specialize in building modern, scalable, and user-friendly digital solutions tailored to business needs. What I Offer We help businesses grow online by delivering: • Clean, modern, and responsive website designs • High-performance and scalable web applications • User-focused UI/UX for better engagement and conversion My Technical Expertise We work across a wide range of technologies, including: • Frontend: HTML5, CSS3, Bootstrap, JavaScript, jQuery, Angular, React • Backend: Node.js, PHP, Laravel, .NET, CodeIgniter, Ruby on Rails, Python • CMS & Platforms: WordPress • Database: MySQL, MongoDB • Mobile Development: React Native, Flutter, and more Why Choose me? ✔️ Clean, optimized, and well-documented code ✔️ Reusable and scalable components ✔️ On-time delivery with complete requirement fulfillment We are confident in our ability to turn your ideas into a powerful digital product. Let’s discuss your project and make it a success. Looking forward to working with you! Best Regards, Md. Toriqul Islam

@lalitatmt

As a results-focused Technical Architect with over 15 years of hands-on experience in designing and developing complex software projects, I can confidently say I'm the full stack engineer you need for this project. Expertise in C#, .NET, React, TypeScript, PostgreSQL, AWS and more align seamlessly with your project requirements. Being a Microsoft Certified Professional reinforces my proficiency and makes me adept at finding the most effective solutions even for intricate tasks. Apart from my extensive work with Microsoft technologies, I take pride in my familiarity with various stacks including MEAN and a continuous process of upskilling myself has made me proficient with Python as well. This means that I am well-placed to understand and utilize OpenAI, LangChain, RAG, and other AI applications for your project. Moreover, while technical competence is crucial for a Full Stack Engineer role, I also value effective communication and collaboration. As we discuss potential collaboration opportunities, I assure you not only my skills but also my dedication to a successful and streamlined development process that aligns perfectly with your vision. Allow me to leverage my vast experience and diverse skill set to create intelligent and impactful software solutions that drive your project outcomes forward. Let's get started!

@mobiwebsolutions

✋ Hi There!!! ✋ THE GOAL OF THE PROJECT:- TO CONNECT AND BUILD SCALABLE FULL STACK APPLICATIONS USING MODERN BACKEND AND AI INTEGRATION TECHNOLOGIES LIKE .NET, REACT, PYTHON AND CLOUD SERVICES. I have carefully read your requirement for Full Stack Engineer collaboration involving .NET, React, TypeScript, FastAPI, PostgreSQL, AWS, Docker and AI based systems like OpenAI and RAG pipelines. I am best fit because I have 9+ years experience as a full stack developer working across backend, frontend and AI integrated applications. 1. Full stack development using .NET, React, FastAPI and TypeScript 2. Database management with PostgreSQL, SQL Server and scalable architecture design 3. Cloud deployment using AWS, Docker and AI integration with OpenAI and RAG systems I will provide UI development, backend development, database management, testing and full source code delivery. I have completed similar AI powered full stack and cloud based enterprise applications. Looking forward to chat with you for make a deal Best Regards Elisha Mariam

@Rajib143

Hi, I've built and maintained multiple production .NET SaaS platforms, including a digital signature platform (DocSignerHub) with multi-provider API integration. Your PostZam requirements — particularly OAuth lifecycle management, per-platform rate limiting, and failure isolation across social APIs — align directly with the kind of distributed resilience patterns I architect daily. I've worked extensively with .NET 8/10, Blazor, and PostgreSQL on cloud deployments. The Google Gemini multimodal API integration for AI captions is particularly interesting — I've integrated multiple LLM APIs (OpenAI, Gemini, DeepSeek) into production systems and understand the nuances of handling multimodal inputs at scale. A few questions: What's your current pain point with the existing API integrations — is it primarily token refresh failures, rate-limit 429s, or upload reliability? And do you have monitoring/alerting in place for per-platform failure detection, or is that part of what you need built?

@anshumanvermaUK

Hi, I’m interested in connecting. I have experience across FastAPI/Python, Node.js, React PostgreSQL, and building AI-powered systems (OpenAI integrations, multi-API orchestration, automation workflows). Thanks Anshuman

@jayantm76

─── ⚡⭐⋆☆⋆⭐⚡ ─── Hi, Client I saw your stack and I am available to connect for collaboration. I am a full stack engineer experienced in C sharp dot net React Next dot js TypeScript Python FastAPI PostgreSQL SQL Server AWS Docker OpenAI LangChain RAG AI powered applications. I’d love the opportunity to discuss how I can support your project’s success. Looking forward to hearing from you.

@xlogicsolutions

Hi, I’ve carefully reviewed your project details and am writing this bid myself with confidence in my fit for the role. Your blend of .NET, React, and AI technologies is an exciting challenge. My experience with .NET and API development, combined with JavaScript and PostgreSQL, equips me well to contribute effectively to your full stack needs including AI-powered solutions. Let’s discuss your project timeline and goals in more detail to align expectations and deliver a great outcome. Could you share more about the specific AI-powered features or integrations you envision using OpenAI and LangChain? Best regards,

@novalitztech

Hi, It looks like you're seeking a Full Stack Engineer with a strong background in technologies like C#, .NET, React, and Python. I can help you build a robust application that integrates seamlessly with AWS and utilizes AI features, ensuring a smooth user experience and scalability. My approach would involve developing a clean architecture that leverages your preferred tech stack, focusing on efficient database management with PostgreSQL or SQL Server. I have experience working with FastAPI and Docker, which will help streamline deployment and maintainability. Additionally, I understand the potential of OpenAI and LangChain for creating innovative AI-powered functionalities. I've worked on similar projects before, where I prioritized user needs and delivered scalable solutions. My commitment to clear communication means you’ll always be updated on progress. Looking forward to the possibility of collaborating! Best regards, Novalitz Tech

@artemb35

Hey there! I’m really excited about the opportunity to collaborate on your project. I’ve been diving deep into full stack development, and I can’t wait to see how we can create something impactful together. I recently worked on a project where I built a dynamic web app using C# and React, integrated with a PostgreSQL database. We incorporated some AI features that allowed for real-time data analysis, which not only improved user experience but also saved time on manual processes. I can see a lot of potential for similar innovations in your project! As for my experience with OpenAI and LangChain, I’ve developed applications that leverage AI for personalized user interactions, making them feel more engaging and responsive. It’s all about thinking outside the box, right? I’d love to know more about how you envision using AI in your application. Would you be open to a quick Zoom call this week to discuss? Looking forward to hearing from you! Best, Artem

@codeandcommand

The FastAPI plus OpenAI combination in your requirements tells me this is an AI-backed service, not just a standard CRUD app. I work in Python daily, have shipped Django and FastAPI backends with Postgres and MongoDB, and know my way around Docker and AWS deployments. I can start today and have an initial working version ready within a week. Pricing and timeline shown are starting points. Once we discuss the project in detail, both may adjust. Want to jump on a quick call?

@lewiss60

Hello, I understand your requirements. I would love to discuss more details via chat. I am looking forward to working with you, Lewis.

@Coredev794

Hi, Good day, I reviewed your project details carefully and can see strong potential to build something both technically solid and polished from a user experience perspective. As a Senior Full Stack Engineer, I focus on delivering scalable, well-structured solutions that are not only functional, but also reliable, maintainable, and aligned with real business goals. I take a practical, results-driven approach throughout development, with clear communication, clean architecture, and attention to both performance and usability to ensure the final product meets your expectations on every level. I bring over 10 years of experience as a Senior Software Engineer, specializing in building scalable, high-quality, and maintainable systems across a wide range of projects. My approach combines strong technical expertise with clear and reliable communication, allowing me to deliver solutions that are not only technically sound, but also aligned closely with business objectives and long-term growth. I’m excited about the opportunity to contribute to your project and deliver reliable, high-quality results. Before getting started, I have a few quick questions to ensure everything is fully aligned with your expectations and project goals. I would appreciate it if you could send me a message when you are available. Cheers, Jonny Ha

@azadshahsayyad

Hello, I am a Full Stack .NET Developer with 4+ years of experience building enterprise web applications, REST APIs, backend services, and database-driven solutions. My core expertise includes C#, .NET Core, ASP.NET MVC, SQL Server, API development, Git, and cloud-based deployments. I have experience working across the full development lifecycle, from requirement analysis and backend development to deployment, troubleshooting, and production support. I have also worked with AI-powered tools and integrations, including OpenAI-based solutions, API integrations, and workflow automation. My background includes developing scalable applications, designing secure APIs, optimizing database performance, and collaborating with distributed teams. Relevant skills: • C# / .NET / ASP.NET Core • REST APIs & Microservices • SQL Server & PostgreSQL • React, JavaScript & TypeScript • Python API integrations • OpenAI & AI-powered applications • Docker, Git & CI/CD • Cloud deployment and production support I am interested in discussing your current and upcoming projects and would be happy to demonstrate how my experience can contribute to your team. Looking forward to connecting. Best Regards, Azadshah Sayyad

@christiaanstimie

I can provide full-stack development expertise with strong skills in C# and .NET, directly aligning with your project needs. I have successfully delivered complex applications using these technologies, ensuring robust and maintainable codebases. My approach emphasizes clean architecture, efficient front-end and back-end integration, and scalable solutions. Do you have specific frameworks or tools within the .NET ecosystem that you prefer to use for this project?

@mattheww065

I have strong expertise as a full stack engineer with extensive experience in C# and .NET development. I understand you’re seeking a professional who can deliver robust and maintainable solutions efficiently. I’ve successfully built and maintained web applications using these technologies, focusing on clean code and scalable architecture. My approach emphasizes clear communication, iterative development, and thorough testing to ensure quality and on-time delivery. Quick question before I suggest an approach: Are you looking to build a new system or enhance an existing one?