Budget: 2000 UAH Deadline: 1 day
Hello.
I am a NodeJS developer. I am ready to take on the task. Write to me, we will discuss.
I am looking for an experienced backend developer to create a reliable API for a self-reflection mobile application with artificial intelligence (Gemini) support and voice mode. The goal is to build a stable server side for an iOS application with a freemium model, a memory journal, and push reminders.
The application already has the following features: login via Apple, text and voice reflection modes, a main screen with themes, a memory journal, push notifications, freemium/premium functionality. A backend is needed to connect all this, store it, and ensure scalability.
Main tasks for the backend:
Design and implement a REST API for the mobile client (authorization, reflection sessions, journal entries, reminder settings, premium features).
Set up database operations (PostgreSQL or similar): user models, entries, subscriptions, analytics.
Integration with AI (Gemini) and voice services via external APIs/microservices.
Implementation of freemium/premium logic: limitations on free access, storing subscription status, unlocking additional features.
Ensuring security (data protection, request limits, logging, error handling).
The basic stack planned:
Backend: Node.js (preferably NestJS, Express is acceptable). Python may be used as a separate microservice for AI logic if needed.
Database: PostgreSQL (ORM: Prisma or TypeORM).
Firebase: Auth for Apple login, push notifications, analytics.
Integration with AI Gemini and voice APIs through separate endpoints/microservices (if needed, a Python service for heavy AI logic).
Deployment: Docker containers in the cloud (to be discussed — AWS/GCP/other).
A complete description of the logic, screen layouts, and access to Figma can be sent after the first communication to agree on the approach and architecture.
I would greatly appreciate it if you could include in your proposal:
Your experience with Node.js (NestJS/Express), PostgreSQL, Firebase, and integrations with external APIs (AI, voice).
Examples of projects where you have developed backend for mobile applications, especially with subscriptions, AI, or voice.
When you can start working.
I am looking forward to your feedback — let’s create a sincere and useful product for self-reflection together.
Budget: 2000 UAH Deadline: 1 day
Hello.
I am a NodeJS developer. I am ready to take on the task. Write to me, we will discuss.
Budget: 27000 UAH Deadline: 7 days
Hello. I have been working with Node.js for over 8+ years. I also have extensive experience with Nest.js/Prisma. I am ready for collaboration.
Budget: 27000 UAH Deadline: 20 days
Hello! I am an experienced freelancer in the field of Full Stack development with a focus on Node.js, PostgreSQL, and integration with external APIs. I have experience in creating backends for mobile applications, particularly with subscription functionality and AI. I am ready to start working on your project soon.
Budget: 12345 UAH Deadline: 1 day
Hello, I have experience in implementing backend for various projects. I mainly work with Nest.js. I have relevant experience with voice and AI. I can start the work immediately after defining the scope. I will be happy to help you!
Budget: 27000 UAH Deadline: 21 days
Good day!
I can implement your project without any problems in a few weeks, and I can start as early as Monday. I would also like to see a more detailed technical specification and stack, then I could suggest alternative solutions for more stable and efficient operation. For example, using Fastify instead of Express due to lower resource consumption, faster request processing, and the ability to handle a larger number of requests simultaneously.
Examples of work:
Relevant projects:
https://rstays.com/
— complete backend from scratch (Node.js Fastify, roles, payment, AI, real-time chat, push, Firebase Auth, mobile + web, deployment, and more)
https://ai-desk.ai/
— backend from scratch for an AI chatbot (Node.js, payment, roles, AI, mobile + web, deployment, and more)
https://seetruth.app/
— backend from scratch on Node.js Express for a mobile application
You can also find more projects in my freelance profile or on GitHub https://github.com/axbuglak/
Best regards,
Buglak Oleksiy
Budget: 27000 UAH Deadline: 28 days
Good day, the last task in the profile was closed with an AI voice agent, I am also developing with TTS, LLM, STT models, any pipelines are not a problem. I have experience in mobile application development (front + backend), NestJs, sqlite/postgresql/supabase.
The latest application is a Productivity app, (AI tools for creating notes, plans, notion type cards). I also created a voice AI assistant for a children's fairy tale application. I use Gemini for LLM, STT, and eventLabs for voiceover (faster response).
I also have extensive experience in data embedding. In your case, for example, it is possible to quickly and cheaply find notes in journals or other objects accurately by tokens.
I would like to see your scheme to understand the architecture more precisely.
Budget: 27000 UAH Deadline: 11 days
Hello!
I have been working on backends with Node.js for several years, mainly with NestJS, sometimes with Express, and I work with PostgreSQL through Prisma and TypeORM, as well as using Firebase. I also regularly integrate external APIs such as Gemini, OpenAI, voice services, CRM, and others.
Regarding relevant projects,
I created an AI manager for a medical business that had a backend with dialogue history, sessions, scenario logic, integrations with AI, and data storage in the database.
I developed a service for restaurants with a voice bot that takes calls, recognizes speech, responds with voice, and creates reservations.
I have also created several SaaS services and mobile backends with subscriptions, freemium/premium logic, limits, roles, and analytics.
For your project, I see a clear API architecture using NestJS, PostgreSQL, and Firebase for login and push notifications, a separate module or service for AI and voice. I can design everything from scratch, establish a proper structure, and implement a stable production backend.
I can start immediately or within the next few days.
I would be happy to look at the Figma and the complete description of the logic, after which I will propose a specific work plan and implementation stages.
Budget: 1000 UAH Deadline: 1 day
I am among the top 5 developers in the category of "Artificial Intelligence and Machine Learning" among ~2100 specialists on the platform.
I guarantee:
- Fast and high-quality task execution
- Strict adherence to deadlines
- Regular communication throughout the entire process
I would be happy to discuss the details of your project in private messages.
Budget: 27000 UAH Deadline: 10 days
Hello! I am very interested in your project. For the voice, I suggest using Eventlabs. I have experience in backend development specifically on your stack (Node.js/NestJS) and I am ready to build a reliable architecture for your application.
I have experience integrating OpenAI/Gemini into commercial chatbots and analytics services. I have also connected animation and lip-syncing to bots https://217-154-170-186.nip.io/
I have developed subscription systems (Stripe/RevenueCat) and have experience working with Firebase (Auth, Analytics, Messaging).
I am ready to start working this week after discussing the details.
My GitHub: https://github.com/onyx144 (Nikita)
I can send the link to the applications in a private message.
Budget: 27000 UAH Deadline: 20 days
Hello, I am a Node, Nest.js developer, I have experience in creating backend architecture and API integration, I am familiar with the main tasks and technical stack, I can take on this project.
my GitHub: https://github.com/RuslanZotsenko22
Budget: 8000 UAH Deadline: 1 day
Good day! I am ready to complete this project as I have extensive experience in application development.
Budget: 26990 UAH Deadline: 29 days
Good day!
My name is Valentin, and I represent Arctic Web Agency. We are a team of experienced web developers who specialize in creating modern and effective web solutions for businesses. I can provide examples of our similar work in personal messages. We are ready to take your project to work!
Sincerely,
Arctic Web Team Freelancehunt
Budget: 27000 UAH Deadline: 15 days
Hello,
I’m very interested in your project and would be glad to help you build a stable, scalable backend for your self-reflection iOS application.
I bring over 9 years of professional backend development experience, with a strong emphasis on Node.js, and solid hands-on expertise in Python and C# as well. Over these years, I’ve designed, built, and maintained production-grade backend systems for mobile and web applications, including AI-powered and subscription-based products.
My core strengths include:
Node.js backend development using NestJS and Express for clean, scalable REST APIs
Python services for AI-heavy logic, data processing, and external API orchestration
C# experience for structured, high-performance backend components and integrations
PostgreSQL with Prisma or TypeORM, including schema design, migrations, and performance tuning
Firebase (Apple login, push notifications, analytics)
Dockerized deployments and cloud environments (AWS/GCP or similar)
For your project specifically, I can:
Design and implement a robust REST API covering authentication, reflection sessions, memory journals, reminders, and premium features
Build a scalable data model for users, entries, subscriptions, and analytics
Integrate Gemini AI and voice APIs through well-isolated services or microservices
Implement freemium/premium access control, subscription status tracking, and feature unlocking
Ensure strong security practices: data protection, rate limiting, logging, and structured error handling
Prepare the backend for long-term scalability and maintainability using Docker and modern cloud practices
I have real-world experience delivering backends for mobile applications with subscriptions, AI integrations, and voice features, and I place strong emphasis on clean architecture, reliability, and clear documentation.
I can start soon and would be happy to review your app flow, logic documentation, and Figma designs to align on architecture and implementation details.
Looking forward to collaborating and building a thoughtful, reliable product for self-reflection together.
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