You will get AI SaaS MVP Build, Python, FastAPI, LangChain, Next.js, OpenAI
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Project details
You will get a production-grade AI SaaS MVP, built on Python and FastAPI for the backend, Next.js or React for the frontend, and OpenAI plus LangChain for the AI layer. Every tier ships a working app that can be handed to real users, not a prototype that breaks under load.
Included by default: secure auth, environment-based config, error logging, OpenAI integration, deployment to Vercel, Railway, Fly, or AWS, and a handoff doc with credentials and deploy commands.
What scales with the tier: Lean MVP fits a solo founder testing one core flow. Full MVP adds Stripe billing, vector RAG over your own data, dashboards, and a richer UI for paying users. Production-Ready adds multi-tenancy, role-based auth, background queues, automated tests, monitoring, and a CI pipeline so your team can keep shipping after I hand it off.
I am Dmitriy, founder and tech lead at the agency behind NaviglassAI (a medical reasoning SaaS) and Stepler (a fitness app with ten million users). I write the code I commit and I review every line that ships.
Included by default: secure auth, environment-based config, error logging, OpenAI integration, deployment to Vercel, Railway, Fly, or AWS, and a handoff doc with credentials and deploy commands.
What scales with the tier: Lean MVP fits a solo founder testing one core flow. Full MVP adds Stripe billing, vector RAG over your own data, dashboards, and a richer UI for paying users. Production-Ready adds multi-tenancy, role-based auth, background queues, automated tests, monitoring, and a CI pipeline so your team can keep shipping after I hand it off.
I am Dmitriy, founder and tech lead at the agency behind NaviglassAI (a medical reasoning SaaS) and Stepler (a fitness app with ten million users). I write the code I commit and I review every line that ships.
AI Algorithms
Large Language Model, Transformer ModelAI Applications
AI ChatbotAI Development Language
PythonAI Tools
Hugging FaceAI Models
ChatGPT, GPT-4, OpenAI CodexWhat's included
| Service Tiers |
Starter
$1,500
|
Standard
$3,000
|
Advanced
$4,800
|
|---|---|---|---|
| Delivery Time | 14 days | 28 days | 42 days |
Number of Revisions | 1 | 2 | 3 |
AI Model Integration | |||
Batch Normalization | - | - | - |
Database Integration | |||
Detailed Code Comments | - | ||
Image Upscaling | - | - | - |
MLOps | - | - | |
Model Deployment | - | ||
Model Documentation | - | - | - |
Model Monitoring | - | - | |
Model Testing & Optimization | - | - | |
Model Tuning | - | - | - |
Natural Language Processing | - | - | |
NLP Tokenization | - | - | - |
Pre-Training | - | - | - |
Prompt Engineering | - | ||
Setup File | - | - | |
Source Code |
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EW
Edgard W.
Dec 29, 2025
Faktastisch Development
AJ
Alan J.
Mar 21, 2024
Developer for edu site
AM
Andrea M.
May 5, 2022
Advice for Creation of NFT to be associated with physical art
Punctual and precise in the explanations
AM
Andrea M.
Apr 13, 2022
Advice for Creation of NFT to be associated with physical art
I recommend him, very knowledgeable and helpful
AM
Andrea M.
Feb 22, 2022
Creation of NFT to be associated with physical art
Dmitriy was very helpful to resolve some problems and answer some questions about blockchain technology
About Dmitriy
Senior AI Engineer LangChain OpenAI LLM RAG Agentic AI Developer
100%
Job Success
Zaporizhzhya, Ukraine - 7:38 pm local time
Recent work: Faktastisch (1700+ hrs, $86K, 5-star) full-stack React/Node SaaS rebuild, Proctoring MVP (active), educational platform ($29K React/Next.js), CTO-as-advisor engagements. Past production builds: MediBrain, MyAnswer, VoiceDesk, Cosmo marketplace, Stepler (N1 Swedish Appstore fitness).
What I deliver:
- Senior full-stack architecture: React + Next.js frontend, Node.js + NestJS backend, PostgreSQL/MongoDB
- Code review and architecture consulting for engineering teams
- Production-ready SaaS from MVP to scale
- TypeScript end-to-end, GraphQL APIs, Supabase, AWS infrastructure
- AI integration when projects call for it: OpenAI, RAG, LangChain
Tech stack: React, Next.js, Node.js, NestJS, TypeScript, PostgreSQL, MongoDB, GraphQL, Supabase. Strong Angular and Python background. Lead engineer for product teams.
Senior Full Stack Developer, Full Stack Developer, React Developer, Next.js Developer, Node.js Developer, NestJS Developer, TypeScript Developer, Architecture Consultant, Code Review Specialist, AI Integration Developer.
Steps for completing your project
After purchasing the project, send requirements so Dmitriy can start the project.
Delivery time starts when Dmitriy receives requirements from you.
Dmitriy works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery and architecture
I scope your data model, vendor picks (LLM, vector DB, auth, payments), and acceptance criteria. Output is a short written plan you sign off on before any code ships.
Build phase
Backend, frontend, and the AI layer land on a private staging URL within the first week. You review, I iterate, we agree on the final cut before anything goes to production.