You will get your React & Next.js bugs fixed and app performance optimized
Project details
Your React app is slow, breaking, or doing something it
shouldn't - and your team can't figure out why. I can.
With 7+ years building React applications, I've seen every
kind of bug: the obvious ones, the sneaky ones, and the ones
that only appear in production at the worst possible moment.
What I care about is not just fixing the problem - but making
sure you understand what happened. I don't just fix and
disappear - you'll know what changed and why.
If you're a founder, product owner, or team lead who needs
someone they can actually rely on - not just a developer who
closes tickets - this is the right project for you.
My stack: React · Next.js · TypeScript · Redux · GraphQL ·
Playwright · Jest · Tailwind CSS
shouldn't - and your team can't figure out why. I can.
With 7+ years building React applications, I've seen every
kind of bug: the obvious ones, the sneaky ones, and the ones
that only appear in production at the worst possible moment.
What I care about is not just fixing the problem - but making
sure you understand what happened. I don't just fix and
disappear - you'll know what changed and why.
If you're a founder, product owner, or team lead who needs
someone they can actually rely on - not just a developer who
closes tickets - this is the right project for you.
My stack: React · Next.js · TypeScript · Redux · GraphQL ·
Playwright · Jest · Tailwind CSS
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$75
|
Standard
$200
|
Advanced
$400
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | - | ||
Detailed Code Comments | - | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$25
Fix Documentation
(+ 1 Day)
+$30
Detailed Code Comments
(+ 1 Day)
+$40
Bug Investigation
(+ 1 Day)
+$50Frequently asked questions
About Eugene
Senior Engineer & AI Automation | n8n, LLM, Dashboards
Kharkiv, Ukraine - 5:32 pm local time
I'm a senior engineer (8+ years) who combines deep frontend expertise with AI automation tools – n8n workflows, LLM APIs (OpenAI/Claude), and rapid prototyping with v0.dev/Lovable.
React dashboards for n8n workflows – I build both the automation (n8n) and the UI to control it
AI chatbot interfaces – Custom React frontends connected to OpenAI / Claude APIs
Rapid MVP delivery – From v0.dev/Lovable prototype to production React.
Playwright + CI/CD – Reduced regression test time by ~10%, improved CI stability
I'm a great fit if:
- You need an AI-powered dashboard or chatbot interface
- You want a React frontend for your n8n automation workflows
- Your SaaS frontend needs performance optimization or a rewrite
- You're migrating from legacy Angular to modern React
Not a fit: Pure CSS/HTML tasks, WordPress, brochure sites
Tech: React, Next.js, TypeScript, GraphQL, n8n, OpenAI/Claude API, Playwright, v0.dev, TanStack Query
Steps for completing your project
After purchasing the project, send requirements so Eugene can start the project.
Delivery time starts when Eugene receives requirements from you.
Eugene works on your project following the steps below.
Revisions may occur after the delivery date.
Review & Reproduce
I review your code and reproduce the issue locally/remote to understand the root cause - not just the surface symptom
Diagnose & Plan
I identify the root cause and share my findings with you before writing a single line of fix.