You will get a full technical audit of your web app with a written report
Top Rated
Project details
Your MVP works in the demo, but you're not sure it's safe to put in front of real users, a bigger customer, or an investor's due diligence. This audit tells you exactly where it stands.
I do a deep review of your web app — authentication, security, database design, payment flows, performance, and architecture — and deliver a written System Health Report: every issue found, ranked by severity, with a prioritized roadmap of what to fix first and why. If your app was built fast on Lovable, v0, Bolt, Replit or Cursor, this is the honest technical read you need before you scale.
You get clarity, not vague "looks fine." Real risks, in plain language, with an action plan.
Why me: Top Rated with 100% Job Success, $200K+ earned and 100+ five-star projects on Upwork, 11+ years across Next.js, React Native, Supabase and AI/LLM integrations. I've shipped and hardened production apps — so I know what breaks at scale and what to look for.
I do a deep review of your web app — authentication, security, database design, payment flows, performance, and architecture — and deliver a written System Health Report: every issue found, ranked by severity, with a prioritized roadmap of what to fix first and why. If your app was built fast on Lovable, v0, Bolt, Replit or Cursor, this is the honest technical read you need before you scale.
You get clarity, not vague "looks fine." Real risks, in plain language, with an action plan.
Why me: Top Rated with 100% Job Success, $200K+ earned and 100+ five-star projects on Upwork, 11+ years across Next.js, React Native, Supabase and AI/LLM integrations. I've shipped and hardened production apps — so I know what breaks at scale and what to look for.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$500
|
Standard
$1,000
|
Advanced
$1,800
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
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FF
Felix F.
Dec 1, 2025
frontend
Anton did an excellent job working on the frontend of our project. He delivered high-quality React development combined with great design skills, creating a clean, modern, and intuitive user experience. His attention to detail, communication, and reliability were exceptional throughout the entire collaboration.
I’m very happy with the results and would gladly work with him again. Highly recommended!
I’m very happy with the results and would gladly work with him again. Highly recommended!
AG
Aaron G.
Feb 18, 2025
Front-end NextJS/React Developer for medical LLM platform
Anton is an excellent developer with a masterful grasp of Front-End development.
He's a pleasure to work with, and I highly recommend taking the opportunity to hire him if you're looking for an expert in React, Next.js and Tailwind; as well as a strong and growing Back-End skill set in Supabase.
He's a pleasure to work with, and I highly recommend taking the opportunity to hire him if you're looking for an expert in React, Next.js and Tailwind; as well as a strong and growing Back-End skill set in Supabase.
OI
Ole I.
Oct 28, 2024
Hugo website engineer for multiple projects
I've been using freelancers for years and worked with a lot of devs. Anton is by far one of the best I've worked with. He was handed a complex Hugo/JS-task and solved with with high precision. Wish I can re-hire for our next job.
PB
Pierre-Luc B.
Oct 25, 2024
Backoffice Web app
MD
Morgan D.
Oct 15, 2024
Build new Saga-it Hugo Site
About Anton
Next.js & React AI Native Developer | AI & LLM Integration for SaaS
100%
Job Success
Kyiv, Ukraine - 2:31 am local time
🎯 HOW I CAN HELP YOU
BUILDING FROM SCRATCH — you need a real product, not a prototype. I build the full stack myself: Next.js + React 1 front end, Supabase/PostgreSQL, Stripe billing, and AI features (chat, RAG on your data, LLM workflows and agents) that hold up under real users and real load.
RESCUING A VIBE-CODED MVP — your app was built fast on Lovable, v0, Bolt, Replit or Cursor and now it's fragile: leaking auth sessions, missing Supabase RLS, Stripe webhooks that silently drop payments, a schema that breaks with every new feature. I turn it into production software — proper auth, security, error handling, database design, payments, deployment. No rewrite unless it's truly needed.
One engineer, no handoffs: front end, back end, database, AI — I build the whole thing myself, pixel-perfect from your Figma designs. And I ship my own products, not just client work — I take apps full-cycle, from idea to a finished product, including AI agents that handle real tasks end-to-end.
TRACK RECORD
5,200+ tracked hours across 11+ years of commercial experience. Recent work: front end for a medical LLM platform (231 hrs — "a masterful grasp of Front-End development"), a long-term SaaS React build (395 hrs), and one client for 3+ years and 2,300+ hours ("by far one of the best devs I've worked with").
HOW I WORK
Honest scoping before any code, weekly demos with no surprises, TypeScript-strict production code your next developer will thank you for, and a clean handover with docs.
Send me one line about what you're building — or a repo/Figma link. Within a few hours you'll get my honest take on approach, timeline, and risks. No sales pitch, just engineering.
STACK
Next.js 14/15 · React 18/19 · TypeScript · React Native/Expo · Tailwind · shadcn/ui · Node.js · Supabase · PostgreSQL · Stripe · OpenAI · Claude · RAG · pgvector · MCP · Vercel · CI/CD
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.
Kickoff & access
You share the repo or app link and tell me your biggest worries. I confirm scope and get read access to what I need.
Deep audit
I review authentication, security (RLS, secrets, API access), database schema, payment flows, performance and architecture — hands-on in the code, not a surface checklist.