You will get one broken mobile page section fixed
Top Rated
Project details
You will get a React Native issue fixed quickly and professionally. I can help with UI bugs, responsive layout problems, CSS/Tailwind issues, component errors, routing problems, API integration issues, and other common frontend challenges. The goal is to resolve the problem efficiently and ensure your application works as expected across devices and browsers. Perfect for startups, SaaS products, landing pages, and web applications that need a fast and reliable fix.
Website Specialization
Business, Education, Entertainment, Online Communities, Podcasting, Blog, Portfolio, Forms, Job Board, Portal, Brochure, SaaS, OtherSupported Plugin Types
Social Media, Gallery, Marketing, Analytics, Video, Events, Shipping, Forum, Music, Payment, Form, Chat, Map, Membership, FAQ, Customer Support, Inventory, OtherWhat's included
| Service Tiers |
Starter
$20
|
Standard
$40
|
Advanced
$75
|
|---|---|---|---|
| Delivery Time | 2 days | 2 days | 3 days |
Number of Revisions | 1 | 2 | 3 |
Software Version Upgrade | - | ||
Browser Caching | - | - | |
Resize Photos | - | - | - |
Minification | - | ||
Database Optimization | - | - | - |
On-Page SEO | - | - | - |
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YA
Yulia A.
Aug 13, 2026
React developer to check speed & serformance test for my website
Halina is a great React developer - strong communication, thoughtful approach, and very clear recommendations. The work was practical, well-structured, and exceeded my expectations. Would happily work together again.
About Halyna
React Developer | Full-Stack | Node React Native Expo AI | SaaS | AM
100%
Job Success
Horodok, Ukraine - 11:08 am local time
I'm here for your React, React Native, MVP, and SaaS projects - starting fresh or fixing what's broken.
I'm Halyna from Koitechs. We fix that: 90+ companies found their React Developer, React Native Developer, MVP Developer, or SaaS developer here - vetted, in-house, matched in 48 hours.
🏆 Why clients work with us
✅ 7+ years of commercial software development experience
✅ 50+ web and mobile projects delivered
✅ 75% repeat clients
✅ 98% client satisfaction rate
✅ 40+ in-house engineers across React, React Native, Node.js, and TypeScript
✅ 48-hour developer matching
✅ 2-week trial period
✅ In-house React Developer s / React Native Developer s / MVP Developer s only - no freelancers
✅ QA, PM, code review, and CTO oversight available
Most companies come to us after missed deadlines or hiring a React Developer, React Native Developer, or MVP Developer who couldn't deliver.
If you're looking for a React Developer, React Native Developer, MVP Developer, SaaS developer, startup developer, Frontend Developer, Mobile Developer, Full Stack Developer, or a React / React Native Development team that can contribute from day one, that's exactly where we help.
We work with companies that need:
a React Developer for web app development - 30+ web apps shipped
a React Native Developer for MVP development - 70+ MVPs launched
an MVP Developer for fast, lean MVP Development for startups
a SaaS developer for SaaS development from idea to launch
a startup developer who can move fast without breaking quality
a Full Stack Developer for scaling existing products
a React Native Developer experienced with GPS, payments, chat, and real-time functionality
a Mobile Developer for iOS and Android applications - 500K+ downloads
a Frontend Developer for startup and SaaS products
a Node.js Developer for backend and API development - 1M+ API requests/month
a Full Stack Developer who can join an existing team quickly
💻 React, React Native, MVP & SaaS Development
Our team has experience building:
15+ healthcare and logistics platforms with React and Node.js
25+ fitness and SaaS products with React Native
20+ marketplaces and e-commerce apps with React
70+ MVPs launched through hands-on MVP Development
apps with GPS, chat, and video functionality
$5M+ processed - React and React Native apps with payment integrations
apps with push notifications and real-time features
React and React Native apps connected to complex backend systems built with Node.js
Our React Developer s, React Native Developer s, MVP Developer s, and SaaS developer s help clients launch new products, run fast MVP Development cycles, improve existing React applications, and modernise legacy codebases.
🚀 Services
React Web App Development
React Native Mobile App Development
MVP Development (Web & Mobile) - our MVP Developer team ships fast
SaaS Development for startups and scaleups
Full Stack JavaScript Development
Node.js Backend Development
Product Scaling
Frontend Development
Application Maintenance & Modernisation
React / React Native Consulting
Team Extension
Performance Optimisation
Feature Development
Application Support
🛠 Tech Stack
React, React.js, React Native, Next.js, Node.js, Frontend Development, Full Stack Development, Expo, Mobile App Development, iOS, Android, TypeScript, JavaScript, Redux Toolkit, React Query, Firebase, Supabase, PostgreSQL, MongoDB, GraphQL, REST API, OAuth, Stripe, AWS, Docker, Vercel, Prisma, Drizzle, Git, Agile, WebSockets, Storybook, Jest, Detox, Push Notifications, App Store, Google Play, SaaS Development, Flutter.
Beyond React and React Native Development, our developers also support MVP Development, SaaS development, backend architecture with Node.js, OpenAI and Claude API integrations, and AI Agent Development.
🤝 What makes us different
✔ In-house React Developer s / React Native Developer s / MVP Developer s only
✔ Full Stack Developer s and SaaS developer s matched to your product needs
✔ Clear communication, weekly reports and demos
✔ 75%+ clients stay with us 6+ months
We don't just send CVs. We connect companies with React Developer s, React Native Developer s, MVP Developer s, and SaaS developer s who have already built similar products and can start contributing quickly.
Whether you need a React Developer, a React Native Developer, an MVP Developer for a new launch, a SaaS developer for an existing platform, a startup developer for an early-stage team, a Node.js Developer, a Frontend Developer, or a Full Stack Developer, we can help.
React Developer • React Native Developer • MVP Developer • MVP Development • SaaS developer • SaaS development • startup developer • Full Stack Developer • Frontend Developer • Node.js Developer • Mobile Developer • React Native Development • React Web Development • Mobile App Development • iOS Development • Android Development • Web Developer • MERN Developer • Scala Developer • WordPress • Laravel • Vue • Angular
Let's talk 🤝
Steps for completing your project
After purchasing the project, send requirements so Halyna can start the project.
Delivery time starts when Halyna receives requirements from you.
Halyna works on your project following the steps below.
Revisions may occur after the delivery date.
Review the issue
I analyze the bug and identify the root cause.
Implement the fix
I fix the issue and test the solution.