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You will get a high-performance app rewritten with modern technologies
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Project details
You will get a fast, scalable, and modern web application optimized for real-world performance and long-term maintainability.
With strong experience in React, Next.js, and TypeScript, I focus on clean architecture, performance optimization, and efficient refactoring of existing systems. I donโt just improve code - I enhance the overall structure, speed, and scalability of your product. The work I deliver is production-ready, well-structured, and built with best practices in mind. ๐๐ฅ
With strong experience in React, Next.js, and TypeScript, I focus on clean architecture, performance optimization, and efficient refactoring of existing systems. I donโt just improve code - I enhance the overall structure, speed, and scalability of your product. The work I deliver is production-ready, well-structured, and built with best practices in mind. ๐๐ฅ
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $1,499
These options are included with the project scope.
$1,499
- Delivery Time 2 days
- Number of Revisions 5
- Design Customization
- Content Upload
- Responsive Design
- Source Code
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IS
Ilya S.
Apr 8, 2026
Senior React Frontend Developer
I had the pleasure of working with Nazar on a React web application, and he did a great job.
He quickly understood the existing codebase and started contributing right away. Nazar handled updates and improvements smoothly, delivering clean and reliable code.
He was easy to work with - communication was clear, he asked good questions, and kept things moving without delays. He also took ownership of his work and suggested useful improvements along the way.
If youโre looking for a solid React developer who can jump into an existing project and deliver quality results, Iโd definitely recommend Nazar. Iโd be happy to work with him again
He quickly understood the existing codebase and started contributing right away. Nazar handled updates and improvements smoothly, delivering clean and reliable code.
He was easy to work with - communication was clear, he asked good questions, and kept things moving without delays. He also took ownership of his work and suggested useful improvements along the way.
If youโre looking for a solid React developer who can jump into an existing project and deliver quality results, Iโd definitely recommend Nazar. Iโd be happy to work with him again
About Nazarii
Senior React Developer | Frontend Developer | Next.js | Fullstack
100%
Job Success
Ternopil, Ukraineย - 8:16 pm local time
๐ 30+ Successfully Delivered Projects
โก Senior Frontend React Developer with 4+ Years of Frontend Development Experience
๐ Built dashboards, CRM systems, Chrome extensions & SaaS products from scratch to production
๐ Optimized apps for performance โ boosting first-load from 40โ60% to 90โ95% on mobile & desktop
๐ Expert in React, Next.js, TypeScript, Tailwind, Storybook, Redux, Zustand, TanStack Query
๐ฏ Focused on clean architecture, scalable code, and production-ready delivery
๐ซ Iโm more than a developer โ I act as a strategic tech partner, turning ideas into scalable, polished, and revenue-generating digital products. I help businesses launch, grow, and excel in their markets, delivering successful solutions across eCommerce, AI/ML, FinTech, MedTech, EdTech, AdTech, InsurTech, and beyond โ consistently driving measurable results.
What I can offer:
๐ Build complete applications from scratch to production, including ongoing support
๐ Rewrite legacy apps with modern technologies to boost performance and code quality
โ Conduct code reviews, debug issues, and ensure clean project architecture
โก Optimize app performance and first load speed - improving load times from 40โ60% to 90โ95% on both mobile and desktop
Tech Stack & Expertise:
๐ฅ Frontend: React, Next.js, TypeScript
๐ฆ State & Data: Redux, Redux Toolkit, Zustand, TanStack Query, XState
๐จ UI & Design: Tailwind, shadcn/ui, Storybook, Material UI, Ant Design, Bootstrap
๐ Backend & APIs: Node.js, Express, PostgreSQL, Supabase, MongoDB, REST/GraphQL
๐ Real-Time & Data-Heavy Apps: Websockets, high-performance UI
๐ Forms & Validation: Formik, react-hook-form, zod, yup
๐งช Testing: Playwright, Jest, Cypress, Vitest
๐ Version Control: GitHub, GitLab, Bitbucket
If youโre looking for a developer who doesnโt just write code but builds products that scale, outperform competitors, and deliver measurable results, Iโd be excited to contribute to your project.
๐ Letโs talk about how I can drive the success of your next project.
โ๏ธ Last updated: 25 June 2026
Steps for completing your project
After purchasing the project, send requirements so Nazarii can start the project.
Delivery time starts when Nazarii receives requirements from you.
Nazarii works on your project following the steps below.
Revisions may occur after the delivery date.
Codebase Audit & Performance Analysis
I will analyze the current architecture, identify performance bottlenecks, technical debt, and create an optimization/rewrite plan.
Modern Architecture Implementation
Refactor or rewrite the application using modern technologies (React, Next.js, TypeScript) with performance best practices.