You will get SaaS Developer | Python FastAPI Backend for AI SaaS Apps
Project details
📩 Before you order, please message me first so we can discuss everything, every project is different, and I want to get your scope, tier, and price right, no surprises.
Building an AI SaaS? I'm Vitalii, a SaaS Developer and Python developer at Olearis. As a SaaS Developer I build the whole system that survives real users: a FastAPI backend, clean APIs, billing, roles, and the AI layer, from LLM integration to data pipelines, wired with cost control.
This SaaS Developer service covers Python Development and AI Development for AI SaaS web apps. As a SaaS Developer, python developer, and ai developer I build FastAPI backends, api development, LLM integration, data pipelines, web scraping, subscriptions, and roles, wired into your SaaS with cost control any software developer can maintain. SaaS Developer, Python Development, AI Development, saas development, FastAPI, python developer, ai developer, LLM, api development.
Building an AI SaaS? I'm Vitalii, a SaaS Developer and Python developer at Olearis. As a SaaS Developer I build the whole system that survives real users: a FastAPI backend, clean APIs, billing, roles, and the AI layer, from LLM integration to data pipelines, wired with cost control.
This SaaS Developer service covers Python Development and AI Development for AI SaaS web apps. As a SaaS Developer, python developer, and ai developer I build FastAPI backends, api development, LLM integration, data pipelines, web scraping, subscriptions, and roles, wired into your SaaS with cost control any software developer can maintain. SaaS Developer, Python Development, AI Development, saas development, FastAPI, python developer, ai developer, LLM, api development.
Programming Languages
PythonCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$49
|
Standard
$99
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 3 | 6 |
Design Customization | - | - | |
Content Upload | - | - | |
Responsive Design | - | ||
Source Code |
Frequently asked questions
About Vitalii
SaaS Developer | AI Development | Python Development | RAG
Kharkiv, Ukraine - 2:12 am local time
I'm Vitalii, an AI SaaS Developer, Python developer, and full stack developer at Olearis. I help founders and startups turn messy AI ideas into production-ready SaaS products that survive real users, real billing, and real load. As a SaaS Developer I own the gap between an AI demo and a platform that scales to thousands of paying users without a rebuild. Solid Python Development is the backbone; disciplined AI Development is the edge.
❗️ Most "AI MVPs" die the moment a real user touches them. Mine don't.
250M+ creators, that's who Beatly connects with Netflix, Uber & Spotify.
$1.58M raised and 50K+ users, that's what Mila Cares runs on.
4.9⭐️, that's where Fillrr landed on a document layer I built.
Most AI Development projects fail not because the model is bad, but because nobody owned the architecture around it. As an AI SaaS Developer I own the whole build, end to end.
🎯 Where I create the most value
▪️ AI Development that earns its place. As an ai developer I build AI assistants, ai agent development, agentic workflows, document parsing, image recognition, RAG pipelines, and job application automation, with LLM integration (OpenAI, Claude) under cost control. From ai chatbot developer work to ai software developer system design, AI Development only pays off when the architecture is right.
▪️ Python Development, end to end. As a python developer I work in FastAPI and Django: REST api development, data pipelines, web scraping, microservices, and automation on scalable backends (AWS, PostgreSQL, Redis). Python web development, python full stack developer work, and python developer aws deploys sit under one roof. I've wired in Interactive Brokers API, Facebook API, and other integrations and OAuth flows. Clean Python Development is the backbone of every SaaS I ship, plain FastAPI or a python full stack developer flask setup.
▪️ SaaS Developer who thinks past features. As a SaaS Developer and software developer I design subscriptions, billing, multi-role admin, RBAC, database architecture, analytics, and the data behind saas marketing and lifecycle insights. From early saas development to saas business development at scale, I build the system, not just features. As a web developer I also cover UI, web design, and dashboards.
🧠 The way I work
Disciplined Python Development from day one means fewer rebuilds and less money burned later. 8 to 10 weeks is a typical MVP build where I take high ownership, then stay for the long-term collaboration. You get one developer who understands the full picture instead of five contractors passing tickets around.
⚙️ Why founders bring me in instead of a cheaper team
Rebuilds are expensive and trust is fragile. As a full stack developer and software developer I don't hand you a prototype and disappear. I build the production-ready infrastructure that keeps an AI SaaS product alive once real users, real data, and real invoices show up. If a previous AI app developer left you with a demo that crumbles under load, that's where I come in.
Different industries, same pattern: an AI SaaS product survives only when someone designs the whole system, Python backend, clean APIs, billing, roles, and the AI Development that actually saves users time. That's what I do as a SaaS Developer, Python developer, and AI SaaS Developer.
🛠️ Stack: Python (FastAPI, Django), Node.js, React, JavaScript, REST api development, data pipelines, web scraping, microservices, data entry automation, subscriptions & billing, cloud deployment.
📩 Building an AI SaaS product, AI app, or Python backend? Send me the brief and I'll tell you honestly what it'll take. I reply fast.
🔑 Areas: Python Development • AI Development • SaaS Developer • python developer • python web development • python full stack developer • python full stack developer flask • python developer aws • ai developer • ai chatbot developer • ai software developer • saas developer • saas development • saas business development • full stack developer • software developer • web developer • web design • api development • web scraping • data entry • interactive brokers api • image recognition • job application automation • saas marketing
Steps for completing your project
After purchasing the project, send requirements so Vitalii can start the project.
Delivery time starts when Vitalii receives requirements from you.
Vitalii works on your project following the steps below.
Revisions may occur after the delivery date.
Build, test & deploy the SaaS backend
I scope your SaaS, build the Python FastAPI backend, api development, billing, roles, and any AI or LLM features with cost control, add tests, then deploy and hand over documented code you can run and scale.