You will get an AI-powered custom web application MVP ready for market launch
Project details
Stop Guessing. Start Testing. Get a Functional MVP Core for $5.
Most developers ask for thousands before you see anything real. I do the opposite.
Using a high-speed AI-assisted development workflow, I’ll build the foundational 60–90% core of your web application — so you can actually see, test, and validate your idea before committing to full development.
What you get in the first phase (48–72 hours):
• A working MVP foundation — not a mockup, but a real, testable web app
• Clean, modern UI with your branding (colors, fonts, basic layout)
• Initial AI functionality (if required for your idea)
Why $5?
This is a low-risk entry point to prove execution speed and quality.
Instead of asking you to “trust me,” I show you a working product first.
After this phase, we can move to the final 10–40%:
advanced features, integrations (payments, APIs), scaling, and full production launch.
Important:
This offer is designed for founders who want to validate ideas quickly — not for full production systems in a single step.
If you want to see your idea come to life fast and make decisions based on a real product — click “Buy Now” and let’s start.
Most developers ask for thousands before you see anything real. I do the opposite.
Using a high-speed AI-assisted development workflow, I’ll build the foundational 60–90% core of your web application — so you can actually see, test, and validate your idea before committing to full development.
What you get in the first phase (48–72 hours):
• A working MVP foundation — not a mockup, but a real, testable web app
• Clean, modern UI with your branding (colors, fonts, basic layout)
• Initial AI functionality (if required for your idea)
Why $5?
This is a low-risk entry point to prove execution speed and quality.
Instead of asking you to “trust me,” I show you a working product first.
After this phase, we can move to the final 10–40%:
advanced features, integrations (payments, APIs), scaling, and full production launch.
Important:
This offer is designed for founders who want to validate ideas quickly — not for full production systems in a single step.
If you want to see your idea come to life fast and make decisions based on a real product — click “Buy Now” and let’s start.
Programming Languages
HTML & CSS, JavaScript, PythonCoding Expertise
Cross Browser & Device Compatibility, Performance OptimizationWhat's included
| Service Tiers |
Starter
$5
|
Standard
$3,000
|
Advanced
$5,000
|
|---|---|---|---|
| Delivery Time | 2 days | 10 days | 20 days |
Number of Revisions | 0 | 2 | 5 |
Number of Pages | 5 | 10 | 15 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $500Frequently asked questions
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CB
Charles B.
Aug 18, 2026
Claude AI Agent Developer
The engagement with Sergey accomplished exactly what was requested and I can’t recommend him highly enough. He’s an excellent developer: technically strong, thoughtful, reliable, and great at turning complex requirements into practical solutions. He’s also a fantastic collaborator and someone I’d gladly work with again.
SG
Sean G.
Dec 12, 2023
React, Tailwind Frontend developer
SK
Shyanne K.
Jun 6, 2022
Looking for React, NextJS developer
Thanks.
PS
Pavel S.
May 15, 2021
React/Next.js LMS Frontend
DR
Daniele R.
Dec 16, 2020
Redirects chain logs page
About Sergey
FullStack Developer | Python, FastAPI, Claude & MCP
Pavlohrad, Ukraine - 5:12 pm local time
Clients that worked with me say:
🗣 "He's easy to work with and genuinely cares about delivering results."
— Charles Brun, Head of Sales, Entrepreneur (12+ months collaboration)
🗣 "Very talented developer with a very positive attitude."
— Rennen Chacham, CTO of Callers ($100k/month revenue) (12+ months collaboration)
🗣 "Sergey's dedication, politeness, and exceptional expertise really stood out to me."
— Rostislav Dugin, Founder & CTO of TgGroups (12+ months collaboration)
What I've built & Maintained:
⚡ Woodle Auto a cloud-based ERP and CRM platform for automotive service businesses, tire shops and auto-parts stores. It was designed to manage the entire operational workflow of a service business.
The platform covered customer and vehicle management, online booking, scheduling, work orders, employee management, inventory, sales, notifications, customer accounts and financial reporting. It was used by around 120 businesses and processed more than 1,700 work orders and service documents per day.
Stack: Javascript/Koa.js, React, Postgresql.
⚡ Wizardly — Real-time AI translation and voice narration pipelines — low-latency backend systems for audio/video processing through multi-stage LLM workflows. Supported the application after launch by resolving production issues, monitoring reliability, and implementing customer-driven enhancements.
Stack: Chrome extension, OpenAI, FastAPI, Celery, AWS SQS, PostgreSQL, Next.js, Hetzner, Stripe.
⚡ Vyrex — AI-driven creator discovery platform — large-scale scraping and data pipelines processing thousands of YouTube/TikTok channels, with AI-generated metadata powering semantic search and recommendations. Currently maintaining the production platform (8+ months), resolving production issues, improving reliability, and shipping new features.
Stack: Claude Agents SDK, FastAPI, Celery, PostgreSQL, Next.js, Hetzner, Stripe.
⚡ RangeTrue — Healthcare AI lab-report analysis — PDF biomarker extraction, optimal-range scoring, and root-cause guidance through a multi-stage LLM + AWS pipeline.
Stack: Next.js, TypeScript, Clerk, FastAPI, AWS Lambda, API Gateway, SQS, S3, Aurora PostgreSQL, Terraform, Anthropic Claude, LiteLLM.
⚡ Askable — AI visibility platform with automated crawling, multi-LLM brand probing (ChatGPT, Claude, Gemini, DeepSeek), technical audits, citation tracking, and AEO scoring — plus weekly brand monitoring UI for tracking LLM changes over time.
Stack: AWS serverless, API Gateway, SQS, FastAPI, Next.js, Supabase, Clerk.
☁️ Infrastructure — built around your budget
I've deployed and run production apps on AWS, DigitalOcean, and Hetzner — and I pick the stack based on what you actually need.
→ Lean and cheap? DigitalOcean/Hetzner with minimal monthly spend.
→ Ready to scale? AWS (Bedrock, ECS/App Runner, Lambda, EventBridge, RDS) from day one.
Either way, you get infrastructure sized to your real expected load and budget — not over-engineered, not fragile.
💡 What I help clients with
⚡ Automating business workflows with AI agents (support, research, data entry, reporting, lead qualification)
⚡ Designing multi-agent systems that integrate into your existing tools and databases
⚡ Building full AI-powered applications from scratch
⚡ Cloud infrastructure & deployment sized to your budget
⚡ FastAPI backends & APIs for async, agent-driven workloads
⚡ RAG pipelines & LLM integrations (Claude, OpenAI, third-party APIs)
⚡ React/Next.js frontends when the agent needs a UI
🧠 My approach
Most "AI automation" fails because it's built like a script, not a system. I focus on:
→ Understanding the actual workflow before writing code
→ Clear agent boundaries & orchestration — no black-box spaghetti
→ Structured state, retries, and observability — agents that fail gracefully
→ Infrastructure that matches your stage — not AWS overkill for a 10-user MVP, not a fragile VPS when you need to scale
The goal isn't a clever demo — it's a system that runs unattended, handles edge cases, and actually saves you hours.
AI Automation, AI Agents, Agentic AI, LLM Integration, OpenAI API, Claude API, Gemini API, RAG, Vector Database, AI Chatbot Development, AI Assistants, Workflow Automation, Business Process Automation, MCP (Model Context Protocol), Multi-Agent Systems, Prompt Engineering, Full Stack Development, Full Stack Developer, Web Application, SaaS Platform, MVP Development, React, Next.js, Node.js, TypeScript, REST API, API Integration, PostgreSQL
Steps for completing your project
After purchasing the project, send requirements so Sergey can start the project.
Delivery time starts when Sergey receives requirements from you.
Sergey works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements & Idea Breakdown
You provide your idea and key requirements. I analyze and structure it into a clear MVP scope to ensure we focus only on what matters for launch.
MVP Architecture & Planning
I define the core system structure, user flow, and key features to build a fast, scalable foundation.