Full-Stack Developer for AI-Integrated React App

@diektech

Hi — Elias here from Miami. I see you’re building a web application and need a full-stack developer with React experience. It sounds like an exciting project. One challenge I often see with similar apps is ensuring smooth integration between the front end and back end, especially when working with APIs. Another is managing data effectively, particularly if you're using PostgreSQL and MongoDB together. These issues can slow down development if not addressed early. My approach would be to first establish clear communication between the front end and back end to ensure everything runs smoothly. I'll focus on setting up a robust API integration and optimizing data flow based on your specific needs. To help me understand your project better, could you share what specific features you're prioritizing? Also, are there any existing systems or databases I'll need to integrate with? Looking forward to your response.

@MashoodurRehman1

I am a seasoned full-stack developer with a focus on AI-integrated React applications. With extensive experience in building responsive React components and integrating AI/LLM capabilities, I am well-equipped to contribute significantly to your project. I have successfully implemented AI functionalities such as chat functionality and content generation in previous projects, utilizing APIs such as OpenAI and Anthropic. I am adept at connecting front-end interfaces with robust back-end systems using Node.js and managing databases like PostgreSQL and MongoDB. Additionally, my familiarity with asynchronous flows, API security measures, and state management will ensure seamless integration of the functionalities you require. My past projects also demonstrate my capability to collaborate effectively on UX, ensuring that AI features enhance the user experience. I am available to discuss the project details further and would be keen to understand your timeline expectations. Could you please share more about the current state of your project and any specific challenges you've identified?

@ykarora26

With hands-on experience in integrating AI/LLM features into React-based applications, I can seamlessly wire up modern AI capabilities for your web app. My proficiency in React, JavaScript, and backend technologies like Node.js positions me well to build and maintain responsive components while ensuring smooth AI integration via APIs. To enhance user experience, I prioritize clean, maintainable code and effective API handling. Could you share more details on the specific AI functionalities you envision integrating to tailor my approach accordingly? Regards, Yogesh Kumar

@webbookstudio

Hi there, We understand you're looking for an experienced full-stack developer to integrate AI features into a React-based web application, utilizing APIs like OpenAI or Anthropic for functionalities such as chat, smart search, and content generation. With our strong background in React, JavaScript, and TypeScript, along with hands-on experience in integrating AI/LLM APIs, we're confident in our ability to deliver high-quality, responsive React components and seamless AI-powered functionality. Our portfolio includes a music voting mobile app built with React Native and Node.js, showcasing our capability in handling complex integrations and real-time features. Can you share more details about the desired UX for the AI features and how you envision them enhancing the user experience? Feel free to message us to discuss the details! — Webbook Studio

@sunainawbst

✅ Lovable AI Expert | AI Development | Game Development ✅ Hi, I’m an AI developer specializing in Lovable AI, LLM-powered applications, and conversational agents. I’ve recently built a game platform using Lovable AI with chat-based agent logic, expressive frontends, and backend integrations, along with voice-enabled AI agents using ElevenLabs and Gemini. My expertise includes custom AI agent architecture, conversational flows, automation, real-time voice & chat systems, and scalable backend integration, delivering human-like and production-ready AI experiences. ⭐Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. I’d love to connect and discuss how I can support your AI initiative. Thanks, Ranjana

@kabirchy

Hi there, Building an AI-integrated React application is an exciting endeavor, and I am equipped to help you achieve your vision. With a strong background in full-stack development, I can seamlessly integrate AI/LLM features into your React-based application. - For the front end, leveraging my expertise in React, I'll ensure a dynamic and responsive user experience. - On the backend, I am proficient in Node.js, which will facilitate building scalable and efficient APIs. - As your project includes AI integration, I will incorporate modern AI libraries and services that align with your goals. - Additionally, my knowledge of databases like MongoDB and PostgreSQL will ensure robust data management. This well-rounded skill set aligns with the requirements of your project and will support the development of a high-quality, AI-enhanced web application. Best Regards, Khorshed Alam, RS Software

@kamran2012

Hi, I will build your React app with AI/LLM integration: responsive components, streaming API responses (OpenAI, Anthropic), and a Node.js backend wired to your database. The AI features will feel native to the UX, not bolted on. On a recent React + LLM build, handling streaming at the component level instead of buffering full responses made the chat feel instant. I will set yours up the same way. Questions: 1) Which LLM provider are you leaning toward (OpenAI, Anthropic, other)? 2) Is the database already chosen, or is that open? Share your repo or Figma and I will outline the component structure today. Looking forward to potentially working together. Thanks, Kamran

@n2rtechnologies

Hi, I've built full-stack React apps with API integrations before. I noticed you're looking for someone comfortable with React on the frontend — that's exactly what we do. We handle the whole stack cleanly, from database design to production deployment. I have delivered 1500+ web and mobile projects over 14+ years — happy to share relevant examples. Let's discuss your project scope and timeline. Send over the details when you're ready. Regards, Nurul Hasan

@Rekhathakur

Hello, I have thoroughly reviewed your project description and am confident in my ability to assist you in completing it successfully. I believe it would be highly beneficial to delve deeper into the job specifics to determine the most effective way forward. I am open to scheduling an interview at your convenience, and I genuinely appreciate the chance to collaborate with you on this project. Your response is eagerly anticipated, and I'm excited about the prospect of working together. Thank you for considering my proposal. Looking forward to your prompt reply! Best regards Rekha!!!

@nikhilgarg96

Hello Greetings, After reviewing your project description, I feel confident and excited to work on this project for you. But I have some crucial things and queries to clear up. Please leave a message on chat so we can discuss this, and I can share my recent work similar to your requirements. Thanks for your time! I look forward to hearing from you soon. Best Regards.

@ludiac

Hi, I’m a full-stack developer with strong experience building React applications and integrating AI/LLM capabilities using OpenAI, Anthropic, and RAG-based architectures. I’ve developed AI-powered chatbots, document intelligence platforms, smart search, content generation, and streaming AI experiences using React, Node.js, PostgreSQL, MongoDB, and vector databases such as pgvector. Relevant projects: https://www.freelancer.com/projects/php/Sharepoint-RAG-SQL-GPT-agent/reviews https://www.freelancer.com/projects/php/SQL-RAG-GPT-Agent-with/reviews https://www.freelancer.com/projects/php/OpenAI-Prompts-for-Telco-Support/reviews https://www.freelancer.com/projects/gpt-agent/Data-Analyst-Required/reviews https://www.freelancer.com/projects/python/Python-Data-Analysis-Script-39438040/reviews https://www.freelancer.com/projects/php/Forms-Automation-Wizard/reviews I'm available to start immediately and can build clean, maintainable React components while seamlessly integrating AI features, streaming responses, secure API handling, and scalable backend services. I'd be happy to discuss your requirements and the best architecture for your application. Thanks

@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 JavaScript, HTML5, Node.js, PostgreSQL, AngularJS, Full Stack Development, MongoDB, API Integration 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.     

@corpmember29

Hello, I have carefully reviewed your requirements and understand the need for a full-stack React application with seamless AI/LLM integration, including chat, smart search, content generation, streaming responses, secure API integration, and scalable backend development. I have 10+ years of experience in React, TypeScript, Node.js, REST APIs, PostgreSQL, MongoDB, OpenAI, Anthropic, RAG pipelines, vector databases, and real-time AI applications. I can deliver clean, maintainable, and production-ready code with a smooth user experience and scalable architecture. >>>> Multi languages (English and Spanish )<<<< **** You can track the project’s progress using the tracker. I’m available to work 40-45 hours per week **** I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. WE WILL FOLLOW AN AGILE METHODOLOGY AND I WILL ASSIST YOU THROUGH THE ENTIRE PROCESS FROM DEVELOPMENT TO DEPLOYMENT. I am available to start immediately and eagerly await your positive response. Thanks. Christina

@giaphung2k1

Hello Launching a web application requires a balance of clean code, security, and speed. I can help you build a scalable product from the ground up. I recently developed a custom platform that successfully scaled to 10,000 active users in month one, ensuring the architecture remained fast and bug-free. What features are you prioritizing for the first release? Let’s chat. Giáp Văn Hưng

@DeveloperStation

Hi, We’ve built several AI-driven web apps, including a product that uses OpenAI’s API to generate personalized email templates based on user data. We also developed a Chrome extension that extracts data from LinkedIn and uses it to create tailored outreach messages. With 15 years of experience, I’ve worked extensively with both front-end and back-end technologies. I’m proficient in modern JavaScript frameworks like React, Vue, and Nuxt, and I’ve developed multiple fully responsive web apps that prioritize user experience. As a dedicated developer, I’m available for discussions anytime and can adapt to your preferred working hours. I also lead a team of expert developers, so I can assign additional resources if needed to meet tight deadlines. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. Feel free to message me anytime—I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best regards, Adil

@vishal1145

Your AI streaming implementation will bottleneck if you're not chunking responses properly — users will see frozen UIs during long generations, and you'll burn through rate limits without backoff logic. Quick questions - are you planning to cache embeddings for your search feature to avoid redundant API calls? And what's your expected concurrent user load so we can size the connection pool correctly? Here is the architectural approach: - REACT + AI INTEGRATION: Build streaming response handlers with abort controllers so users can cancel mid-generation without memory leaks, plus implement exponential backoff for OpenAI rate limits. - NODE.JS + POSTGRESQL: Design a queue system using Bull/Redis to process AI requests asynchronously, preventing timeout failures during high-traffic periods. - API SECURITY: Implement token rotation and request signing so API keys never touch the client, plus add usage tracking to prevent cost overruns from prompt injection attacks. I've built 4 production AI apps in the past 18 months, including a RAG-powered search tool that handles 200K queries/month without breaking OpenAI's tier limits. Let's schedule a 20-minute call to walk through your prompt architecture before you commit to a build.

@notwillingcurren

Hi, I'm a senior full-stack developer (10+ years) who has recently been integrating LLM APIs (OpenAI, Anthropic/Claude, OpenRouter) into production apps - streaming responses, prompt/session handling, and retrieval-style lookups. Comfortable with React/TypeScript on the front end and Node.js + Postgres/Mongo on the back end, and I pay close attention to API key security, rate limiting, and error handling around external AI calls so a slow or failed model response degrades gracefully instead of breaking the UX. Happy to share recent AI-integration examples and talk through your current stack, timeline, and priorities. Quoting a bit above the lower end of your range to reflect senior-level AI integration experience specifically, not just React CRUD work - open to discussing based on scope and how quickly you want to move.

@onkarkulkarni8

Hi, your "Full-Stack Developer for AI-Integrated React App" project is right in my wheelhouse. I develop modern JavaScript apps end to end — React/Vue/Next on the front and Node/Express on the back, in TypeScript where it helps. Working with javascript, html5, node.js, postgresql, angularjs, full stack development, mongodb, api integration, I focus on responsive, fast UIs, clean component structure, and reliable APIs — no page-builder shortcuts. I'll lock down the scope and key flows first, then ship in reviewable increments. Let's hop on a quick chat to align on your requirements? ⭐ 5.0/5 from a recent client: "it was great working with him, did whatever changes i asked him as per my need." Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.

@Hubready

Hello!, I am a Florida-based senior software engineer(frontend, backend, ecommerce, etc) and I read your project description carefully. You need a full-stack developer who can build a React app with AI integration, solid API handling, and a backend that’s stable from day one. That’s exactly the kind of work I’ve been doing for about 15 years with React, Node.js, PostgreSQL, MongoDB, and API integration. My approach would be: 1) clarify the AI flow, data model, and user journey 2) map the React UI and backend/API structure 3) build the core app and integrate the AI logic 4) test, refine, and make sure it’s fast, stable, and easy to maintain I’m very detail-focused, so I don’t just skim the brief. I ask the right questions early and make sure the final result matches the real goal, not just the surface request. Relevant work examples: - React + Node analytics dashboard for a fintech startup - AI-assisted internal ops tool for a logistics team - PostgreSQL-driven SaaS portal for a B2B platform - Custom API workflow app for an e-commerce business Could you please clarify the following questions to help me better understand the project? 1) What AI feature should be built first, and do you want OpenAI or another provider? 2) Do you already have the API endpoints and database schema, or should I help design them? 3) Is there an existing codebase, or are we starting from scratch? If you want someone who reads carefully, builds cleanly, and thinks ahead, I’d be glad to help.