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AI Companion Web App (Frontend + Backend) – Using Existing Prompt & Persona System PROJECT OVERVIEW I am building an AI companion web app. The core AI prompt, persona rules, and behavior logic are already finalized (~90%). Your role is NOT to design AI behavior, but to implement the frontend and backend system that uses the provided prompt exactly as-is. Think of this as building the container, plumbing, and UI around an existing AI “brain”. SCOPE OF WORK (WHAT YOU WILL BUILD) FRONTEND (Web App) Clean, simple web UI Pages required: Login / Sign up page Chat page Persona selector (simple buttons, e.g. “Aisya”, “Nor”) Frontend requirements: Responsive Simple chat UI (like ChatGPT style) No complex animations needed Focus on usability AUTHENTICATION Google Login (OAuth) Email & password login (optional but preferred) Session handling User must stay logged in across refresh BACKEND Secure API endpoint for chat Backend calls OpenAI API (API key via ENV, NOT hardcoded) Backend assembles prompt before each AI call Prompt assembly order (IMPORTANT): Core system prompt (provided by me, do not edit) Persona prompt (based on user selection) Memory summary (from database) Latest user message PERSONA SYSTEM (IMPORTANT) Users can select a persona (e.g. “Aisya”, “Nor”) Persona selection should: Update a user field (e.g. persona_active) NOT trigger an AI call Persona only affects prompt when user sends a message Persona rules: Persona content will be provided by me Do NOT modify persona prompt text Just load the correct persona prompt dynamically MEMORY SYSTEM (SIMPLE) This is NOT advanced AI memory. Requirements: Database table for memory Each memory record contains: user_id type (preference / emotion) short text summary updated_at Rules: Store summary, not full chat logs Limit memory injection to max 3–5 items Memory logic can be basic (manual or rule-based) DATABASE Minimum required tables: Users Memories Optional: Conversation log (basic) TECH STACK (Preferred) You may propose alternatives, but preferred stack is: Frontend: [login to view URL] (React) Backend: API routes / server functions Database: PostgreSQL / Supabase / Firebase Auth: Google OAuth Hosting: Vercel / equivalent If you recommend a different stack, explain WHY. IMPORTANT RULES (READ CAREFULLY) DO NOT: Edit, rewrite, or “improve” the AI prompt Design AI behavior or personality Auto-store full chat history as memory Hardcode API keys Make architectural decisions without discussion YOU MUST: Use prompt text exactly as provided Load prompts from files or constants Keep logic modular and readable Comment code where logic matters Deliver source code under my ownership DELIVERABLES Working web app (login → chat → persona switch) Source code (GitHub repository under my account) Environment variable setup instructions Simple README explaining: how to run locally how to deploy Deployed test version (optional but preferred) ACCEPTANCE CRITERIA Project is considered complete when: User can login with Google User can chat with AI AI responds using provided prompt Persona switching works correctly Memory is stored and injected properly No prompt editing by developer IDEAL DEVELOPER Comfortable with AI integrations Understands prompt-based systems Does not “freestyle” behavior logic Communicates clearly Will ask questions before making assumptions APPLICATION QUESTIONS (IMPORTANT) Please answer the following when applying: Have you built AI chat apps before? Share examples. Which stack do you propose and why? How would you implement persona switching without changing AI logic? Are you comfortable using an existing prompt without editing it? FINAL NOTE This project is about precision and discipline, not creativity in AI behavior. You are building the system, not the personality.
Proje No: 40092934
184 teklifler
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184 freelancer bu proje için ortalama $536 USD teklif veriyor

I have extensive experience in PHP, Website Design, HTML5, HTML, and Backend Development, making me a perfect fit for the Interactive AI Web App Development project. I am confident in my ability to deliver a high-quality product that meets your requirements. Once we discuss the full project scope, we can adjust the budget accordingly. I am eager to start working on this project and demonstrate my skills. Please go through my profile, which showcases 15 years of experience, and let's discuss the job details. I am ready to show my commitment to this project by starting work without being hired first. Looking forward to hearing from you.
$525 USD 10 gün içinde
8,8
8,8

Hi, I can implement this exactly as specified: a clean AI chat web app that wraps your existing prompt and persona system without modifying any AI logic. I’ll build the frontend (login, chat, persona selector) and backend plumbing so prompts are assembled in the required order, personas switch cleanly without triggering calls, and memory is stored and injected within your limits. Google OAuth, secure API handling, and environment-based keys are standard. I’m comfortable working with existing prompts, and I won’t “improve” or rewrite behavior. I have built AI chat app before and can walk you through it also. Let's connect so that we can quickly align on stack and repo access and get started. Regards, Sagar
$750 USD 7 gün içinde
6,9
6,9

Hi there, I’m excited about the opportunity to develop your AI companion web app. With extensive experience in building interactive web applications, I fully understand the importance of adhering strictly to your specifications, particularly in utilizing existing prompt and persona rules. My background includes implementing frontend systems with a clean, responsive UI and establishing secure backend API integrations. I will ensure smooth functionality with Google OAuth login, a user-friendly chat interface, and proper memory management, all while maintaining the modularity and readability of the code as per your guidelines. I can deliver a working version within 14 days and provide extensive documentation for easy deployment.
$250 USD 4 gün içinde
6,8
6,8

Hello, I have carefully reviewed the requirements for the Interactive AI Web App Development project and understand that the core AI prompt and persona rules are already finalized. My approach to this project would involve implementing a clean and simple web UI with pages for login/sign up, chat, and persona selection. The frontend will be responsive and focus on usability, with a simple chat UI similar to ChatGPT style. For the backend, I will ensure secure API endpoints for chat, integrate with the OpenAI API using environment variables, and handle prompt assembly based on user selections. I am confident in my ability to deliver a high-quality project that meets your expectations. Let's discuss further details and get started on this project.
$250 USD 2 gün içinde
6,6
6,6

Hello Dear! I write to introduce myself. I'm Engineer Toriqul Islam. I was born and grew up in Bangladesh. I speak and write in English like native people. I am a B.S.C. Engineer of Computer Science & Engineering. I completed my graduation from Rajshahi University of Engineering & Technology ( RUET). I love to work on Web Design & Development project. Web Design & development: I am a full-stack web developer with more than 10 years of experience. My design Approach is Always Modern and simple, which attracts people towards it. I have built websites for a wide variety of industries. I have worked with a lot of companies and built astonishing websites. All Clients have good reviews about me. Client Satisfaction is my first Priority. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam
$250 USD 4 gün içinde
6,0
6,0

Hello, I have reviewed the details of your project. i will focus on structure clarity and respect for your existing ai logic. the web app will use next js with react for a clean responsive chat interface that feels familiar and easy to use. login will support google oauth and email password with session persistence so users stay logged in after refresh. the backend will live inside next js api routes and handle all chat requests. when a user sends a message the server will assemble the prompt in the exact order you define starting with the core system prompt then persona prompt then memory summaries then the latest user message. all prompt text will be loaded from constants files without any edits. the openai api key will be stored in environment variables only. persona switching will simply update a persona_active field on the user record in the database and will never call the ai by itself. memory will be stored in a postgres database using a simple table with short summaries only and limited to a few records per user. Let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira
$500 USD 7 gün içinde
5,6
5,6

Hello Irfan K., I am Maryam Abbas, a seasoned professional with 4 years of expertise in PHP, Website Design, HTML, HTML5, Backend Development, Frontend Development, AI Development, and API Development. I have carefully reviewed the requirements for the Interactive AI Web App Development project. For this project, I will meticulously implement the frontend and backend systems as per the provided prompt, focusing on a clean and responsive web UI, simple chat interface, and secure API endpoints. I will ensure seamless persona selection functionality and memory management, adhering strictly to the specified rules and requirements. Kindly review my portfolio at https://www.freelancer.pk/u/maryam951 and initiate a chat to discuss the project details further. Best regards, Maryam Abbas
$250 USD 5 gün içinde
5,2
5,2

Hello Irfan K., We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on PHP, Website Design, HTML5, HTML, Backend Development, Frontend Development, API Development, AI Development Please come over chat and discuss your requirement in a detailed way. Regards
$500 USD 7 gün içinde
4,9
4,9

Hello, after going through your project description in detail, I understand that you need the frontend and backend system implemented of the AI companion web app that will use the provided prompt exactly as is. Let's schedule a chat so that we can discuss your project requirements in more detail. Looking forward to working with you, Fahad.
$250 USD 2 gün içinde
5,3
5,3

Hi, I carefully read your full project description and the detailed rules around precision, discipline, and strict use of the provided AI prompt and persona system. The way you described this project as building the container around an existing AI brain makes the expectations very clear, and that approach strongly aligns with how I usually work on AI driven products where control and consistency matter more than experimentation. I clearly understand that my responsibility here is to implement a clean frontend and a reliable backend that uses your finalized prompt exactly as provided, handles authentication, persona selection, session persistence, memory injection, and secure API communication without altering behavior logic in any way. The separation of core prompt, persona prompt, memory summary, and user input is well defined and fully achievable with a modular and readable architecture. Core goals include secure login, responsive chat interface, persona switching without triggering responses, controlled memory handling, and prompt accurate AI responses. I have 7+ years of experience across web development, backend systems, UI UX implementation, and AI integrated applications. I focus on clarity, ownership, and building systems that behave exactly as intended. Let us schedule a quick chat to align your vision and next steps. Best Regards, Prasham Jain
$254 USD 14 gün içinde
4,8
4,8

Hi there! I’ve reviewed your project and specialize in building robust web applications with existing AI integrations. I’ll implement the frontend and backend system for your AI companion, ensuring the prompt is used exactly as provided while maintaining clean user interaction and session handling. Let’s schedule a quick meeting to discuss your specific needs and how we can make this project a success! Best Regards, Amjad Iqbal
$500 USD 4 gün içinde
4,8
4,8

We understand you want results that drive business growth and stand out in a competitive market. Reaching your KPIs and delivering a memorable outcome is our priority. Our team will provide creative strategies, clear communication, and on-time results. We always tailor solutions to fit your unique brand and goals. You can view my previous work at this link: https://www.freelancer.com/u/Lsstudio1228 Let’s create something great together. LS STUDIO
$500 USD 7 gün içinde
4,5
4,5

I'm sarita from Dlite Info Tech, your go-to developer for intricate backend systems like the one you envision. My 4+ years of experience in backend development using PHP and popular frameworks like Laravel, CodeIgniter & CakePHP make me the perfect fit for your project. I have efficiently built various AI-driven web applications including chatbots that align with the core tenet of this project - to provide clean plumbing and a seamless UI around the existing AI "brain". At Dlite Info Tech, we endorse secure development practices; be it utilizing environment variables for API key or employing OAuth login mechanisms like Google’s for secure authentication process. We aim to deliver robust solutions, without any compromise on code quality which is evident in my previous works and will be emphasized as I deliver your source code with complete ownership to you through GitHub repository under your account. Let's build a remarkable project together!
$499 USD 15 gün içinde
4,6
4,6

Hi , Good afternoon! Already have something live to show you I am professional mobile programmer with skills including Backend Development, Frontend Development, HTML, PHP, HTML5, AI Development, API Development and Website Design. Please contact me to discuss more about this project. Thanks for giving opportunity
$250 USD 2 gün içinde
4,6
4,6

Hey Happy Holiday, I’ve gone through your project requirements and I have 7 years of experience building AI powered web applications. I can handle the complete frontend and backend setup, including authentication, chat UI, persona selection logic, prompt assembly, basic memory storage, and OpenAI API integration using environment variables. My estimated timeline is 3-4 weeks, and I propose a budget 400-650$. I’m flexible with revisions and keep communication regular. Let me know if you’d like to discuss any specific requirements. Happy to answer any questions you have. Best regards, Shawana
$400 USD 18 gün içinde
4,3
4,3

Hey, there! Can I have your attention? I read your project description carefully and I clearly understand what you need. I’m Amir N., a professional Python Developer, Web Scraping Specialist, SEO & Web Developer with 4.8★ rating and 44+ reviews on Freelancer. I’ve successfully completed similar tasks such as data extraction, web automation, WordPress sites, Python scripts, and lead generation systems. Freelancer Here’s how I can help you: ✔ I will follow your project requirements step by step. ✔ I use clean and efficient code that works reliably. ✔ I test everything before delivery to make sure it works perfectly. My approach: 1️⃣ I will first confirm your exact needs and timeline. 2️⃣ I will create a clear plan and start work immediately. 3️⃣ I will deliver a working result and maintain communication throughout. I also have experience with [mention specific software / tool from the job description (e.g., Shopify / Excel / Python / SQL / WordPress / Data Entry / API integration) if required]. I’m ready to start right now, and I’ll keep you updated at every step. Let’s discuss the project in more detail — I’m confident I can deliver excellent results. Thank you!
$350 USD 1 gün içinde
4,4
4,4

Hi, I can develop your interactive web app with a responsive UI, real‑time interactions and a scalable backend API. I’ll build clean authentication, dynamic components, smooth transitions and reliable data flows so users can interact seamlessly with features like live updates, forms, dashboards and real‑time feedback. I’ll ensure code quality, security best practices and deployment readiness with documentation and basic tests included. To ensure the project meets your requirements: 1. Which frontend framework do you prefer (React, Vue, Svelte)? 2. Do you need real‑time features (WebSockets, polling, server events)? 3. What backend stack should I use (Node.js, Python, Laravel)? I’m ready to deliver a modern, engaging web application. Thanks!
$500 USD 10 gün içinde
4,4
4,4

Hey , I just went through your job description and noticed you need someone skilled in API Development, Backend Development, Website Design, HTML5, HTML, PHP, AI Development and Frontend Development. That’s right up my alley. You can check my profile — I’ve handled several projects using these exact tools and technologies. Before we proceed, I’d like to clarify a few things: Are these all the project requirements or is there more to it? Do you already have any work done, or will this start from scratch? What’s your preferred deadline for completion? Why Work With Me? Over 180 successful projects completed. Long-term track record of happy clients and repeat work. I prioritize quality, deadlines, and clear communication. Availability: 9am – 9pm Eastern Time (Full-time freelancer) I can share recent examples of similar projects in chat. Let’s connect and discuss your vision in detail. Kind Regards, Zain Arshad
$250 USD 2 gün içinde
4,2
4,2

Hi , I am a senior web developer with 12 years of experience who is good at PHP, HTML, HTML5, API Development, Website Design, Backend Development, AI Development and Frontend Development. I 've checked your job description in detail and understood what you want. I would like to have a brief chat with you to discuss your project and start work. Best regards, Charonda
$555 USD 1 gün içinde
3,7
3,7

Hi there! I’m Robert, a Senior Full-Stack & AI Engineer with over 10 years of experience architecting and delivering SaaS platforms, automation systems, and intelligent applications, specializing in responsive design, secure backend systems, and AI integrations. I developed a multi-tenant SaaS chatbot system using ASP.NET Core and LangChain, which aligns perfectly with your requirement for a robust AI companion web app. With my background in clean architecture and modular logic, I can implement a clean user interface and secure backend while using the provided prompts exactly as specified. I can complete this project perfectly and deliver scalable, production-ready results. My commitment to quality includes structured documentation, CI/CD automation, and following strict OWASP-based security practices, ensuring user data is protected. Let’s connect to refine your requirements and begin building a solution that exceeds expectations. What specific features are you looking to prioritize first during the development phase?
$500 USD 30 gün içinde
3,2
3,2

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