You will get Next.js developer to build your AI SaaS MVP (React, TypeScript)
Top Rated
Top Rated
Project details
Need an AI-powered SaaS product in front of users fast without spending six months on infrastructure decisions? As a senior Next.js developer, I take your idea to a working, production-ready MVP on Next.js, React, and TypeScript.
This isn't a boilerplate or a throwaway demo. You get a real full-stack product: a Next.js frontend, a clean API layer, a proper database, and AI features (LLM, RAG, or automation) built into the workflow where they actually create value - not bolted on as a gimmick.
My approach is outcome-first: we define the one metric the MVP needs to move, scope tightly around it, and ship something you can put in front of real users and investors. Clean architecture from day one means no rewrite when you scale.
Recent results from AI SaaS work: cut a pricing-quote process from hours to 15 minutes with a RAG pipeline, and reduced lead churn by 70%. 12+ years of full-stack experience, delivered end to end - architecture, frontend, backend, AI, and deployment.
If you want a Next.js developer who ships an AI SaaS MVP that works in production, not just a slide, this is built for that. Message me before ordering so we can scope your MVP correctly.
This isn't a boilerplate or a throwaway demo. You get a real full-stack product: a Next.js frontend, a clean API layer, a proper database, and AI features (LLM, RAG, or automation) built into the workflow where they actually create value - not bolted on as a gimmick.
My approach is outcome-first: we define the one metric the MVP needs to move, scope tightly around it, and ship something you can put in front of real users and investors. Clean architecture from day one means no rewrite when you scale.
Recent results from AI SaaS work: cut a pricing-quote process from hours to 15 minutes with a RAG pipeline, and reduced lead churn by 70%. 12+ years of full-stack experience, delivered end to end - architecture, frontend, backend, AI, and deployment.
If you want a Next.js developer who ships an AI SaaS MVP that works in production, not just a slide, this is built for that. Message me before ordering so we can scope your MVP correctly.
What's included
| Service Tiers |
Starter
$4,500
|
Standard
$9,000
|
Advanced
$18,000
|
|---|---|---|---|
| Delivery Time | 21 days | 35 days | 60 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 3 | 6 | 10 |
Design Customization | |||
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$1,500Frequently asked questions
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SL
Shawn L.
Apr 22, 2026
Fractional Engineer: Audit, Stabilize, and Incrementally Improve (Next.js + Vercel)
SZ
Sumorwuo Z.
Apr 6, 2026
SaaS revamp. AI business process automation
MateCube took over our stalled rebuild and got us back to shipping in about eight weeks. Alex and his team reworked the Next.js codebase: tightened the TypeScript, restyled the React components in Tailwind, rebuilt the API layer in Node.js, and migrated the database to Supabase with PostgreSQL. Deploys run on Vercel now. What stood out was how Alex ran things. He was upfront about timelines. When scope came in lighter than expected we saw it back on the invoice. We're already planning the next phase with MateCube
RM
Robin M.
Feb 27, 2026
30 minute consultation
SZ
Sumorwuo Z.
Dec 23, 2025
Emergency Engineer Needed for JavaScript and Ruby Bug Fixes
Alex built our Next.js + TypeScript web app end-to-end, including React components styled with Tailwind CSS, a Node.js API layer, and a Supabase/PostgreSQL backend deployed on Vercel. He's an exceptional partner; thoughtful, reliable, and deeply invested in delivering high-quality work. Working with him felt less like hiring a contractor and more like adding a trusted teammate. He takes the time to understand the problem, asks the right questions upfront, and consistently delivers solutions that are both practical and well-executed. Communication was clear throughout, timelines were respected, and the end result exceeded expectations. I'd happily work with Alex again and recommend him to anyone looking for someone they can truly trust with important work
SK
Safwaan K.
Apr 16, 2025
Next.js | Memory Leak
One of the best freelancers I've worked with. Highly recommend. Nextjs project, fixed fast, communicative too.
About Alex
Nextjs developer / Full Stack Developer Nextjs / AI development
100%
Job Success
Berlin, Germany - 12:05 am local time
12 years of software development experience, 4,000+ hours worked on Upwork, 20+ successful projects with 5-star reviews, and Top Rated Plus status.
If you're looking for a Next.js Developer who can build and scale AI-powered SaaS products from idea to production, you're in the right place. As a Full Stack Next.js Developer, I take projects from concept to launch without unnecessar.
A strong combination of NextJS Developer, Full Stack Developer NextJS, and AI
Development expertise allows projects to move from concept to launch without
unnecessary complexity, technical debt, or costly architectural mistakes.
💡 What clients typically need help with
• NextJS Developer services for SaaS products and custom platforms
• Full Stack Developer NextJS development from MVP to enterprise scale
• AI Development using OpenAI, Anthropic Claude, LangChain, LangGraph, and vector
databases
• API Development and third-party integrations
• Front End Developer Next.js implementation with modern UI frameworks
• NestJS Developer services for scalable backend systems
• Web Design implementation and frontend optimization
• AI SaaS Development for startups and growing businesses
🛠 Technology Stack
Frontend: Next.js 15 (App Router, RSC, Server Actions), React 18/19, TypeScript,
Tailwind, shadcn/ui
Backend: Node.js or Python/FastAPI, Ruby on Rails, PostgreSQL with Supabase or
Prisma, Redis where the workload needs it
AI and LLM work: Anthropic Claude, OpenAI, LangChain, LangGraph, Vercel AI SDK,
pgvector, Pinecone, LoRA fine-tuning for specialized models.
Infrastructure: Vercel and AWS, Docker, GitHub Actions for CI
Testing: RSpec, Capybara, FactoryBot, Playwright when the project uses a JS stack for
end-to-end
📈 Proven Results
✔ Built a multi-country coupon marketplace with 60+ API Development integrations
across multiple languages and currencies.
✔ Developed a maritime SaaS platform supporting the complete sales lifecycle in 170+
currencies and 3 languages.
✔ Delivered AI Development solutions that reduced quote generation time from hours
to 15 minutes and decreased lead churn by 70%.
✔ Built AI SaaS Development platforms that automate proposal generation, RFP
responses, and knowledge retrieval using modern LLM architectures.
✔ Developed high-performance marketing experiences with mobile performance
targets below 1.5-second LCP.
🏗 Full-Stack & Ruby on Rails Expertise
As a Full Stack Developer NextJS, I have been integrating Google Workspace,
Microsoft 365, Stripe, Braintree, banking providers, AI services, and complex third-party
ecosystems.
Also Ruby on Rails has been my core specialization for more than a decade. So I know
how existing Rails applications can be modernized, scaled, integrated with AI
capabilities, or gradually migrated to Next.js architectures without disrupting business
operations.
⚡ Core Services
• NextJS Developer consulting and development
• Full Stack Developer NextJS architecture and implementation
• Front End Developer Next.js development
• NestJS Developer backend development
• AI Development and LLM integration
• AI SaaS Development
• API Development and system integrations
• Image Recognition integrations and AI-powered workflows
• Job Application Automation platforms and workflow systems
• Web Design implementation for SaaS products
• NextJS modernization projects
• Ruby on Rails migration
🔥 Why clients work with me
Companies typically hire a NextJS Developer when they need more than just frontend
implementation. They need a Full Stack Developer NextJS specialist capable of making
architecture decisions, leading development, and delivering production-ready solutions.
As a NextJS Developer and Full Stack Developer NextJS, I help SaaS businesses
launch products faster, integrate AI capabilities, and scale existing applications. Many
clients initially hire a NextJS Developer for a specific feature but continue working
together because they also need AI Development, backend architecture, and product
strategy support.
My typical engagement combines the work of a Front End Developer Next.js, NestJS
Developer, React Developer, and Full Stack Developer in a single role. This reduces
communication overhead and accelerates delivery.
Whether the project requires a NextJS Developer, Full Stack Developer NextJS, NestJS
Developer, React Developer, or dedicated AI Development expertise, the focus remains
on building scalable SaaS products with measurable business impact.
🎯 Whether the goal is launching a new SaaS product, scaling an existing platform,
integrating AI capabilities, or migration a Ruby on Rails application, the focus remains
the same: delivering reliable solutions that create business value and reach production
faster.
Send a message with and you will get a clear technical approach, realistic roadmap,
and honest feedback within a few hours.
Steps for completing your project
After purchasing the project, send requirements so Alex can start the project.
Delivery time starts when Alex receives requirements from you.
Alex works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & scope
we define the core use case, the one metric to move, data sources, and architecture
Design & prototype
UI structure and a clickable flow for the core journey