You will get improved Next.js performance with better Core Web Vitals
Project details
I help identify and fix real performance issues in modern web applications, not just improve Lighthouse scores.
With close to two decades of experience in frontend development, I focus on Core Web Vitals, rendering bottlenecks, unnecessary JavaScript, and inefficient data loading patterns.
This is not a generic audit. You will get a clear, actionable report with prioritized issues and practical fixes that can be implemented immediately.
If you choose a higher tier, I can also implement the improvements directly in your codebase.
Typical results include faster load times, improved user experience, and measurable performance gains.
With close to two decades of experience in frontend development, I focus on Core Web Vitals, rendering bottlenecks, unnecessary JavaScript, and inefficient data loading patterns.
This is not a generic audit. You will get a clear, actionable report with prioritized issues and practical fixes that can be implemented immediately.
If you choose a higher tier, I can also implement the improvements directly in your codebase.
Typical results include faster load times, improved user experience, and measurable performance gains.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance OptimizationWhat's included
| Service Tiers |
Starter
$300
|
Standard
$700
|
Advanced
$1,200
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 5 days |
Number of Revisions | 1 | 1 | 2 |
Number of Pages | 2 | 5 | 10 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $250Frequently asked questions
About Sinisa
Senior Frontend Engineer | React, Next.js, TypeScript, A11y
Rijeka, Croatia - 11:03 pm local time
I am a Senior Frontend Engineer with 18+ years of experience building complex web applications, specialized in React, Next.js, TypeScript, frontend architecture, performance, accessibility, and long term maintainability.
Clients usually bring me in when a frontend has grown messy, performance has become a real problem, accessibility needs proper implementation, or a React / Next.js codebase needs senior level refactoring without disrupting delivery.
I work especially well on long lived products, complex user flows, legacy codebases, reusable UI foundations, and frontend systems that need both technical judgment and practical execution.
What I can help with:
- React and Next.js development
- TypeScript codebases
- frontend architecture and refactoring
- performance optimization
- accessibility and WCAG minded implementation
- reusable component systems
- code reviews and technical audits
- stabilizing and improving legacy frontends
I care about clarity, maintainability, and shipping work that still makes sense months later.
Steps for completing your project
After purchasing the project, send requirements so Sinisa can start the project.
Delivery time starts when Sinisa receives requirements from you.
Sinisa works on your project following the steps below.
Revisions may occur after the delivery date.
Analysis
I analyze your website using real-world metrics, Lighthouse, and manual inspection to identify performance bottlenecks.
Audit Report
You receive a structured report with prioritized issues, explanations, and clear recommendations.