You will get Web App in 3 months from expert react developer | NextJS, NodeJS, React
Top Rated
Project details
🌟Over 10 years, we've successfully completed 600+ projects and delivered top-tier solutions to clients in the US and Europe. Trust us to build exceptional web applications that redefine user experiences.
Choosing us to create your web application is a win-win strategy.
✔️Experience
✔️Customization
✔️ User-Focused Design
We bring all this to your web app. Timely delivery, scalability, and ongoing support are our promises. Your success is our mission!
📞Before making a purchase, I suggest you conduct a quick intro call to get to know your requirements more.
Choosing us to create your web application is a win-win strategy.
✔️Experience
✔️Customization
✔️ User-Focused Design
We bring all this to your web app. Timely delivery, scalability, and ongoing support are our promises. Your success is our mission!
📞Before making a purchase, I suggest you conduct a quick intro call to get to know your requirements more.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included $50
These options are included with the project scope.
$50
- Delivery Time 70 days
- Number of Revisions 2
- Design Customization
- Content Upload
- Responsive Design
- Source Code
Frequently asked questions
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YM
Yuriy M.
Apr 2, 2026
Front End Developer | React Developer Needed
YM
Yuriy M.
Mar 30, 2026
Front End Developer | React Developer Needed for Dashboard Tweaks
Very satisfied working with Sergii and Halo Lab, work has been done quickly with corresponding quality
YM
Yuriy M.
Mar 3, 2026
React Frontend Developer for Crypto Dashboard Tweaks
Working with Sergii and Halo Lab was outstanding. Highly recommended for any type of work
LL
Lucie L.
Feb 25, 2025
Website development
KR
Kelson R.
Nov 20, 2024
QA Testing for the Application
We were very impressed at the diligent QA! We have a React Native / Expo mobile application. Sergii worked closely with the developer to coordinate successful releases, type up detailed QA plan, and find edge case bugs. We saw a noticeable improvement in the stability of our mobile app once we began working with him. Highly recommend!
About Sergii
Front end Developer React | React developer Node.js | Next.js CSS
100%
Job Success
Odessa, Ukraine - 9:08 am local time
📍 No short-term projects.
📞 Kick-off with the team is mandatory.
🧨 Available for a quick project start.
★ Top-100 Service Provider by Clutch
★ $500M+ Raised by clients
★ 99+ International Awards
★ 15+ years of expertise (NOKIA, OPERA, OPPO, UDEMY, AUTH0, etc.)
👨💻 About Me
I am a web developer, full stack developer, and react developer with 10+ years of experience in Web Development and Software Development, building high-performance applications. My work spans both front-end and back-end — with a strong specialization in Front-End Development using React, Next.js, and modern frameworks.
I have deep expertise in HTML, HTML5, CSS, CSS 3, JavaScript, and modern UI technologies, along with experience in jQuery, Bootstrap, Vue.js, and React Native for building responsive and scalable interfaces.
I also bring strong product thinking as a front end designer and front end web developer, helping teams create experiences that are not only technically solid, but also intuitive and user-friendly, with a strong focus on Web Design.
Over the years, I’ve delivered scalable products using React, Next.js, TypeScript, Node.js, and modern cloud technologies. I also work as a front end developer AI and front end developer Python, helping teams integrate AI-driven experiences into their platforms.
Additionally, I have experience with PHP, WordPress, and PSD to HTML conversions, using tools like Adobe Photoshop to ensure pixel-perfect implementation.
As an expert-vetted developer, I bring a blend of deep technical expertise, hands-on leadership, and a proven track record delivering complete digital products.
🏆 Highlights
Expert-Vetted web developer & senior full stack developer
20+ Upwork clients, 50+ fully shipped products
Head of Development at the Best Creative Agency in Ukraine (Upwork Awards)
Extensive experience as a react developer, front end developer React, and front end developer Next.js
Strong background as a front end designer and front end web developer for modern SaaS, eCommerce, and custom platforms
💼 Core Skills
100+ projects using React, Next.js, Redux, GraphQL, Gatsby, Vue.js, JavaScript, TypeScript
Experience as a Shopify front end developer (Shopify themes, Hydrogen, Liquid)
Strong full stack developer abilities: Node.js, NestJS, Express, Fastify
Databases: MongoDB, MySQL, PostgreSQL
UI: Tailwind, Bootstrap, Sass, Storybook
Performance: AMP, PWA, accessibility & compliance
Testing: Cypress, Playwright, Jest, Selenium
Cloud: AWS, Google Cloud, Azure
Additional expertise as front end developer AI (LLM integrations, AI chat interfaces)
Python-based API and automation experience as a front end developer Python
Experience working as a front end designer and front end web developer on polished, conversion-focused digital products
💎 What I Do
As a senior web developer and full stack developer, I build complete, scalable digital experiences:
Front-end development using React, Next.js, Tailwind — solid experience as a front end developer React and front end developer Next.js
E-commerce development as a Shopify front end developer
AI-powered interfaces as a front end developer AI (OpenAI, vector search, chat UI)
Python integrations as part of my front end developer Python expertise
Back-end architecture with Node.js, Express, NestJS
Cloud deployments (AWS, GCP, Azure)
API development & database design
High-performance UX/UI systems built with Storybook
I work extensively as a react developer, delivering interfaces that are modern, fast, and optimized for scale.
I also contribute as a front end designer and front end web developer, making sure products look clean, feel smooth, and support business goals.
🧰 Services
SaaS Development
Custom Web Apps (React, Next.js)
Shopify Solutions (Shopify front end developer services)
WordPress / Headless CMS sites
Full-stack applications (Node.js, React, Next.js)
AI-driven UI components (front end developer AI)
Python-based enhancements (front end developer Python)
Front-end architecture and UI implementation as a front end designer and front end web developer
💎 Why Work With Me
As an experienced web developer, full stack developer, and dedicated react developer, I manage the full lifecycle of modern product development. I combine:
Clean, scalable engineering
Strong architecture & DevOps
Clear communication & project leadership
Deep experience as a front end developer React, front end developer Next.js, react developer, and Shopify front end developer
A practical approach as a front end designer and front end web developer focused on usability, clarity, and performance
My goal is simple: deliver world-class software that performs, scales, and generates business value.
✅ Let’s Work
If you’re looking for a seasoned web developer, a reliable full stack developer, or a highly skilled react developer / front end developer React, I’d love to discuss your project!
Steps for completing your project
After purchasing the project, send requirements so Sergii can start the project.
Delivery time starts when Sergii receives requirements from you.
Sergii works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Workshop
The workshop is designed to facilitate a thorough discussion between the business analyst and the client to gather the necessary information for the software requirements document. This is the initial step in our requirements-gathering process.
Requirements Document and Architecture Design
The business analyst develops specification requirements, the lead developer crafts a high-level plan, outlining system components, modules, interfaces, and their interactions. This aims to guarantee scalability, reliability, and maintainability.