You will get Build a Full-Stack SaaS MVP with React, Node.js and TypeScript
Top Rated
Project details
I build modern SaaS and MVP applications from idea to launch, including frontend, backend, database, authentication, payments, APIs and AI integrations.
Unlike many developers who only handle one part of the product, I work on the entire system: product structure, technical architecture, development, testing and launch preparation.
I can build landing pages, dashboards, admin panels, Stripe subscriptions, user roles, third-party integrations and AI-powered features using technologies such as React, Next.js, TypeScript, Node.js, PostgreSQL, Supabase and OpenAI.
My process starts with understanding your business and product goals. Then I create the best technical structure for your SaaS and build it step by step with clear communication during the entire project.
You will receive clean, scalable code, a professional product structure and a solution that is ready for future growth.
Unlike many developers who only handle one part of the product, I work on the entire system: product structure, technical architecture, development, testing and launch preparation.
I can build landing pages, dashboards, admin panels, Stripe subscriptions, user roles, third-party integrations and AI-powered features using technologies such as React, Next.js, TypeScript, Node.js, PostgreSQL, Supabase and OpenAI.
My process starts with understanding your business and product goals. Then I create the best technical structure for your SaaS and build it step by step with clear communication during the entire project.
You will receive clean, scalable code, a professional product structure and a solution that is ready for future growth.
Programming Languages
HTML & CSS, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Localization, DesignWhat's included
| Service Tiers |
Starter
$899
|
Standard
$1,999
|
Advanced
$3,499
|
|---|---|---|---|
| Delivery Time | 7 days | 30 days | 70 days |
Number of Revisions | 2 | 6 | Unlimited |
Number of Pages | 7 | 16 | 40 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$500 - $1,600
Additional Revision
+$160
Additional Page
(+ 1 Day)
+$140
AI Integration
(+ 2 Days)
+$400
API Integration
(+ 2 Days)
+$250
Admin Dashboard
(+ 4 Days)
+$550Frequently asked questions
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NB
Niels B.
May 28, 2026
Help test AI coding orchestration tool
EI
Ed I.
Feb 3, 2025
Convert Shopify Theme to Bootstrap
5 star job!
EL
Enrique L.
Dec 19, 2024
Wix Website Small Fixes
Thanks Martin for your guidance and honesty! 5 stars
AA
Alex A.
Oct 7, 2024
UI for web app
Very dedicated and committed developer.
AP
Adam P.
Jul 18, 2023
Finish a Nuxt.js 3 Site
Excellent Developer and will hire again for sure.
About Martin
AI Agent Engineer | Orchestration, Claude MCP, LangGraph, GPT
100%
Job Success
Vilnius, Lithuania - 4:26 am local time
a Software Engineer, now full-time System Engineer building AI-driven SaaS at Mplus (DE), available for select Upwork projects.
I'm Martin — Top Rated, 100% JSS, 5★ across all closed contracts.
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WHAT I ACTUALLY SHIP
→ Production AI agents that don't fall over
Stateful agents with retries, tool routing, error recovery,
observability, and cost control — not a demo that breaks
on the second user.
→ Custom orchestration when frameworks aren't enough
LangGraph and Claude MCP where they fit. Custom architectures
when your workflow doesn't fit a framework. I design the
agent system — I don't just bolt one together.
→ Claude & OpenAI integrations done seriously
Anthropic Claude with Tools and MCP, OpenAI Assistants &
Agents SDK, function calling, structured outputs, streaming,
hybrid model routing for cost/latency trade-offs.
→ Full-stack delivery around the agent
Python for the AI layer, Node/TypeScript for APIs and web.
Postgres, pgvector, queues, webhooks. The agent isn't the
product — the system around it is. I build both.
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CURRENT WORK (gives you a sense of what I do day-to-day)
System Engineer at Mplus (DE) — building an AI-driven SaaS for
residential energy efficiency analysis: B2C assessment tools
plus a B2B contractor marketplace. Real users, real production.
Past: R&D monitoring system for a Tel Aviv pharmaceutical client.
High-traffic B2C platform with 1.2M+ users at Enkonix (AWS,
message queues, cross-team integrations).
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MY STACK
AI Layer: Anthropic Claude (Tools, MCP), OpenAI Assistants
& Agents SDK, LangChain, LangGraph, custom orchestration
Backend: Python (primary), Node.js, TypeScript, FastAPI, Express
Data: PostgreSQL, pgvector, Redis, MongoDB, Supabase
Infra: AWS, Vercel, Docker, queues, webhooks, observability
Web: React, Next.js (when the agent needs a UI around it)
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HOW I WORK
Day 1-2: Discovery call. I map your agent's workflow, edge cases,
and failure modes BEFORE writing code.
Week 1: First working agent loop in staging — you run real
inputs against it.
Ongoing: Async updates, weekly demo, observability dashboard so
you see what the agent is doing.
Handoff: Clean repo, README, evals, deployment docs, runbook
for common failures.
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NOT A FIT IF YOU NEED:
✗ "Build me a ChatGPT clone" — that's a wrapper, not an agent
✗ Pure prompt engineering with no system behind it
✗ Trading bots, gambling, or crypto-trading AI
✗ The cheapest bid — I'm not it
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If you've hit reliability walls with n8n + GPT, or you're past
the prototype stage and need a real system — send me the brief.
I'll come back with a scoped architecture plan, not a generic pitch.
— Martin
Steps for completing your project
After purchasing the project, send requirements so Martin can start the project.
Delivery time starts when Martin receives requirements from you.
Martin works on your project following the steps below.
Revisions may occur after the delivery date.
Product Discovery and Scope Definition
I review your idea, goals, target users, required features, references and technical needs to define the project scope.
Architecture and Technical Planning
I define the frontend, backend, database, payments, integrations and overall system structure before development starts.