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You will get React & Next.js Emergency Performance Rescue
Project details
If your React or Next.js app suddenly became slow, unresponsive, or unstable, this service gives you fast, senior-level help to diagnose the issue and restore performance.
I specialize in emergency debugging for production web apps – fixing hydration freezes, runtime spikes, slow loads, breaking API calls, memory leaks, and other issues that block users or harm revenue. I work quickly and focus only on high-impact areas so your app becomes stable again as soon as possible.
You’ll get a clear diagnosis, direct fixes (Standard/Advanced tiers), before/after metrics, and a Loom walkthrough explaining what happened and how it was resolved. No guesswork. No vague advice. Real fixes with measurable improvement.
If your app is breaking, slow, or unstable, I’ll help you get it back under control fast.
I specialize in emergency debugging for production web apps – fixing hydration freezes, runtime spikes, slow loads, breaking API calls, memory leaks, and other issues that block users or harm revenue. I work quickly and focus only on high-impact areas so your app becomes stable again as soon as possible.
You’ll get a clear diagnosis, direct fixes (Standard/Advanced tiers), before/after metrics, and a Loom walkthrough explaining what happened and how it was resolved. No guesswork. No vague advice. Real fixes with measurable improvement.
If your app is breaking, slow, or unstable, I’ll help you get it back under control fast.
Programming Languages
JavaScript, TypeScriptWhat's included
| Service Tiers |
Starter
$500
|
Standard
$1,500
|
Advanced
$3,000
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 3 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Emergency 2h Extension
+$300
Extra Critical Page/Flow Fix
(+ 1 Day)
+$500
Post-Incident Hardening Plan
(+ 1 Day)
+$500Frequently asked questions
About Stepan
Senior Product Engineer | React/Next.js/TS + AI/LLM | Frontend-Heavy
Kyiv, Ukraine - 2:31 pm local time
I’m a senior product engineer (8+ years of professional experience), frontend-heavy by strength, with strong backend and architecture skills. I’m best when the product has complex UI/runtime behavior, messy edge cases, performance bottlenecks, or needs to move from “works in demos” to production-ready.
What I’m especially good at:
Complex frontend systems (React / Next.js / TypeScript)
- client-side business logic
- state/data flow architecture
- real-time UI behavior
- performance optimization
- reliability under edge cases
End-to-end product delivery
- Node.js / APIs / DB integration
- auth, permissions, multi-tenant concerns
- deployment + production hardening
AI-native product engineering
- LLM / agent integrations (code-first)
- tool calling / orchestration
- evals / tracing / observability
- AI product UX and reliability tradeoffs
Typical work I do
- Stabilize and harden an AI product MVP for production
- Build complex product features end-to-end (frontend-heavy)
- Fix performance / rendering / state / architecture problems
- Implement agentic workflows and production integrations
- Improve dev velocity and shipping quality in messy codebases
How I work
I use modern AI dev tools (Claude Code + Codex / agents / AI-assisted workflows) to move faster, but I’m not a “vibe coder.” You hire me for engineering judgment, architecture, and production-quality execution.
Good fit if you need someone who can:
- own a feature or workstream with minimal supervision
- handle frontend complexity without duct tape
- go end-to-end when needed
- communicate clearly and ship reliably
If you already have something working but it’s fragile / slow / hard to extend — that’s exactly the kind of work I’m strongest at.
Steps for completing your project
After purchasing the project, send requirements so Stepan can start the project.
Delivery time starts when Stepan receives requirements from you.
Stepan works on your project following the steps below.
Revisions may occur after the delivery date.
Immediate Assessment
I review the broken flow, logs, and app behavior to confirm the failure source.
Live Profiling & Diagnosis
Runtime, hydration, API, bundle, and error profiling to locate the root cause.