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You will get AI-generated app (Lovable / Replit / Cursor) ready for production

Anton M.Status: Offline
Anton M.
5.0
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Anton, priced and ready to go.
Anton M.Status: Offline
Anton M.
5.0
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Anton, priced and ready to go.

Project details

Built your app fast with Lovable, Replit, Cursor or Claude — and now it's buggy, fragile, or not safe to launch? I turn AI-generated prototypes into stable, secure, production-ready products.

I'm a Top Rated Plus senior full-stack developer (React, Next.js, Node.js, TypeScript, Supabase) with $300k+ earned and 40+ products shipped. I know where vibe-coded apps break — and how to fix them without a full rewrite.

What you get:
 • A full review of your codebase, architecture and security
 • Bug fixes and stabilization across the whole app — not just the happy path
 • Security hardening: auth, input validation, secrets, rate limiting, safe data handling
 • Performance and database cleanup (Supabase / PostgreSQL)
 • Clean, maintainable, documented code your next developer can build on
 • Deployment and launch-readiness (Vercel and more)

I work fast, communicate clearly, and tell you honestly what's worth fixing vs. rebuilding.
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Security

What's included $3,000

These options are included with the project scope.

$3,000
  • Delivery Time 10 days
  • Number of Revisions 3
  • Number of Pages 10
    • Content Upload
    • Responsive Design
    • Source Code
Optional add-ons You can add these on the next page.
Additional Page (+ 1 Day)
+$200
5.0
18 reviews
100% Complete
(18)
1% Complete
(0)
1% Complete
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1% Complete
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1% Complete
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ac

airesh c.
5.00
Jul 27, 2026
Frontend Developer — Audit & Fix Responsive Design Issues on Live Website Excellent contractor. Delivered exactly what was needed with minimal back-and-forth, took feedback well, and kept me updated at every stage. Reliable and professional-highly recommend.

BF

Brendan F.
5.00
Mar 18, 2026
Customer Support Engineer

AA

Armend A.
4.70
Dec 9, 2024
Frontend Developer for DevTool project

JR

Jerome R.
5.00
Nov 15, 2024
CSS Expert Needed to make an existing page more responsive It was a pleasure working with Anton, he understood well the task, managed to jump into an existing codebase and perform the task to our full satisfaction, has great communication and overall feels very professional. Will definitely work with him again when the need arises!

CP

Christoph P.
5.00
Nov 11, 2024
Frontend Developer with strong Next.js experience Anton did a great job in our development team. You can rely on him to deliver high-quality work consistently and on time. His expertise in NextJS was evident as he seamlessly integrated into our team, quickly understanding our workflow and project requirements. Anton is not only technically skilled but also a proactive and reliable team player. He communicated effectively, kept us updated, and took the initiative to resolve any issues that arose. It was a pleasure working with him, and I would highly recommend him to anyone seeking a skilled and dependable frontend developer.
Anton M.Status: Offline

About Anton

Anton M.Status: Offline
Full Stack React/Next.js SaaS Expert | AI-Native, Supabase, Stripe
100% Job Success
5.0  (18 reviews)
Warsaw, Poland - 6:42 pm local time
Two long-term Upwork contracts over $100K each (2,400+ and 1,900+ hours with the same clients). 10 years of React, Next.js and TypeScript.

I help startups and companies build and scale SaaS platforms, dashboards and AI-powered web apps — React, Next.js, Node.js, TypeScript, Supabase, Stripe. Top Rated, 6,875 hours on Upwork, 40+ products delivered.

Most of my work is complex SaaS: dashboards, internal tools, billing and subscriptions, authentication, multi-tenant architecture, admin panels, integrations, and performance-heavy applications handling large amounts of data and real business logic.

I also rescue and harden AI-generated codebases — apps started in Lovable, Replit or Cursor, or "vibe-coded", that need to become stable, secure, production-ready products. I know where that kind of code tends to break and how to fix it without a full rewrite.

I'm comfortable owning products end-to-end — from frontend architecture and product UX to backend APIs, database design, payments and third-party integrations. I've worked both on products built from scratch and on large existing codebases that needed to be fixed, scaled and cleaned up.

I build AI-native: I use Claude, Claude Code and modern AI tooling daily to move fast on implementation and exploration — while keeping architecture, security-sensitive logic and final code quality firmly under human review.

What i usually help with:
- SaaS platforms and startup products (0→1 and scaling)
- dashboards, admin panels and internal tools
- React / Next.js frontend architecture
- Node.js APIs and backend systems
- authentication, billing and Stripe integrations
- Supabase, PostgreSQL and database design
- AI integrations (Claude / OpenAI APIs, LLM product features)
- rescuing and hardening AI-generated or legacy codebases
- performance optimization, SEO and scaling

How i work:
- i think in systems, not isolated tasks
- i focus on maintainability and long-term scalability
- i communicate clearly and proactively, and work well async
- i can take ownership and make sound decisions from a spec, without heavy hand-holding
- i care about product quality, not just shipping features

Tech i use daily:
React, Next.js, TypeScript, Node.js, Vite, TanStack, Tailwind, Supabase, PostgreSQL, MongoDB, Stripe, Vercel, and modern AI tooling (Claude / OpenAI) depending on the project.

If you're building a SaaS product, launching an MVP, or need to turn a rough or AI-generated app into something production-ready — send me a message. I'll take an honest look at your setup and tell you how I'd approach it, what to improve, and what to expect.

Steps for completing your project

After purchasing the project, send requirements so Anton can start the project.

Delivery time starts when Anton receives requirements from you.

Anton works on your project following the steps below.

Revisions may occur after the delivery date.

Gather requirements

Time/price estimation

Review the work, release payment, and leave feedback to Anton.