Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get a Fast, Responsive Front End Built with React

Mariya S.Status: Offline
Mariya S. Mariya S.
4.5
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Mariya, priced and ready to go.
Mariya S.Status: Offline
Mariya S. Mariya S.
4.5
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Mariya, priced and ready to go.

Project details

I'm a senior javascript developer, react developer, react.js developer, react native developer, mobile app developer, web developer, full stack developer, full stack javascript developer, node developer, and node.js developer with 25+ years of experience building responsive web applications and cross-platform mobile apps using React, Vue, Angular, React Native, Expo, and Next.js.

I specialize in SPAs, PWAs, SSR platforms, mobile-first UI systems, scalable frontend architecture, and high-performance applications as a backend developer and full stack developer.

✔️ 25+ years in frontend and mobile development
✔️ 700+ web and mobile applications delivered
✔️ Responsive and accessibility-focused UI systems
✔️ 95+ Lighthouse scores on production platforms
✔️ 60+ App Store & Play Store apps published
✔️ Platforms scaling to 10M+ monthly users
✔️ Deep UI/UX and performance optimization expertise
✔️ Strong experience with SPA, SSR, and hybrid rendering systems
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Design

What's included $7,000

These options are included with the project scope.

$7,000
  • Delivery Time 30 days
  • Number of Revisions 0
    • Source Code
4.5
23 reviews
70% Complete
(16)
22% Complete
(5)
4% Complete
(1)
4% Complete
(1)
1% Complete
(0)

CT

Colt T.
5.00
May 15, 2026
React & React Native Developer | Full Stack JavaScript Developer The whole Sibers team was excellent to work with. I will be engaging with them any time I have web or mobile development needs in the future!

CT

Colt T.
5.00
May 15, 2026
React & React Native Developer | Full Stack JavaScript Developer I had a great experience with entire Sibers team. They were phenomal to work with. Extremely professional, detail-oriented, and accountable. I will absolutely be working with them again for all my development needs. It helps that they also have a wide breadth of expertise.

SI

Stephen I.
5.00
Nov 2, 2022
App for blockchain api

HG

Heiner G.
5.00
May 24, 2022
Developer needed to create a course-/time reporting tool for a small language school.

SR

Sam R.
5.00
Mar 23, 2022
Laravel Dashboard with REST APIs needed for Back-end of App and Website Great communication, projects were delivered on time and to specification.
Mariya S.Status: Offline

About Mariya

Mariya S.Status: Offline
Front End Developer React Developer Full Stack Developer React Next.js
100% Job Success
4.5  (23 reviews)
Platja d'Aro, Spain - 2:28 pm local time
$1M+ earned on Upwork. 25+ years, 700+ projects, and deep JavaScript/TypeScript expertise across React, Next.js, Node.js & NestJS. I build and scale SaaS, web apps, automation, APIs, and complex platforms from architecture to production.

👋 I’m a veteran Senior Full-Stack JavaScript/TypeScript Engineer, Full Stack JavaScript Developer, React Developer, Node.js Developer, and Web Developer with 25+ years of experience building scalable web applications, SaaS platforms, automation systems, browser extensions, and enterprise-grade JavaScript products.

I work across the full product lifecycle - from architecture and UI development to backend APIs, cloud infrastructure, integrations, performance optimization, and production support. My core stack includes React, React.js, Next.js, Node.js, NestJS, TypeScript, Vue.js, Angular, PostgreSQL, MongoDB, Redis, AWS, Docker, and serverless technologies.

Over the years, I’ve delivered 700+ projects across SaaS, eCommerce, Fintech, Web-to-Print, EdTech, Healthcare, CRM, AI automation, marketplaces, analytics, and enterprise platforms.

🏆 RESULTS & EXPERIENCE

✔ 25+ years in full stack development and web engineering
✔ 700+ web, SaaS, React, Node.js, and automation projects delivered
✔ Systems handling 10M+ API requests per month
✔ 30+ applications scoring 90–100 in Lighthouse audits
✔ Backend performance improvements of up to 50%
✔ Production experience with startups, scaling products, and enterprise systems
✔ Advanced AWS serverless, event-driven, and real-time architecture
✔ CI/CD and monorepo workflows that accelerate delivery and simplify maintenance

⚡ FRONTEND / REACT DEVELOPMENT

As a Senior React Developer and Frontend Developer, I build fast, maintainable interfaces for SaaS platforms, dashboards, marketplaces, internal tools, and customer-facing applications.

My frontend expertise includes:

• React 18, React.js, Next.js 14+, Vue.js, Angular, TypeScript
• SPA, SSR, ISR, PWA, and responsive web application development
• Tailwind CSS, Material UI, SCSS, Bootstrap, and reusable UI systems
• Complex dashboards, analytics interfaces, charts, and data visualization
• Storybook, design systems, reusable component libraries, and UI architecture
• Nx, Turborepo, Module Federation, and micro frontend architecture
• Core Web Vitals, Lighthouse optimization, bundle reduction, and frontend performance
• Mobile-first development and React Native integrations
• Chrome extensions, browser extensions, content scripts, background services, and extension APIs
• Puppeteer, Playwright, browser automation, scraping workflows, and automated testing

🔌 NODE.JS / BACKEND DEVELOPMENT

As a Node.js Developer and Backend Developer, I design scalable APIs and backend systems that support complex business logic, real-time workflows, automation, and high-volume applications.

• Node.js, NestJS, Express, Koa, Hapi
• REST API and GraphQL development
• PostgreSQL, MongoDB, MySQL, DynamoDB, Firebase, Redis
• Prisma, Sequelize, TypeORM, Mongoose
• JWT, OAuth, RBAC, secure authentication, and permissions
• WebSockets, SocketIO, Redis, Kafka, and real-time infrastructure
• BullMQ, AWS SQS, queues, workers, and background processing
• Microservices and event-driven architecture
• AWS Lambda, EventBridge, Step Functions, and serverless systems
• ETL pipelines, analytics processing, and data aggregation
• OpenAI API, Dialogflow, AI integrations, and automation workflows

☁️ CLOUD, DEVOPS & DELIVERY

I build production-ready systems with reliable deployment, monitoring, and scaling workflows.

• AWS, Docker, CloudFront, S3, Vercel, Firebase
• GitHub Actions, GitLab CI/CD, Bitbucket Pipelines
• AWS CDK and infrastructure as code
• Sentry, Datadog, ELK Stack, logging, and monitoring
• Redis caching, database optimization, and cloud cost reduction
• Monorepos with Nx and Turborepo
• Secure deployment and environment management

🌍 PRODUCTS I BUILD

• SaaS platforms and startup MVPs
• AI-powered products and automation systems
• eCommerce and marketplace platforms
• CRM, ERP, and internal business tools
• Fintech and analytics applications
• Healthcare and EdTech platforms
• Real-time dashboards and reporting systems
• Browser extensions and browser automation tools
• API integrations and workflow automation
• Legacy platform modernization

⚙️ CORE TECHNOLOGIES

JavaScript, TypeScript, React, React.js, Next.js, Vue.js, Angular, Node.js, NestJS, Express, PostgreSQL, MongoDB, MySQL, Redis, AWS, Docker, Firebase, Vercel, GraphQL, WebSockets, Puppeteer, Playwright, Stripe, OpenAI API, SendGrid, PandaDoc.

✅ LET’S BUILD A PRODUCT THAT CAN SCALE

Message me If you need a Senior Full Stack Developer, Full Stack JavaScript Developer, React Developer, Next.js Developer, Node.js Developer, Backend Developer, or Web Developer who can take ownership of both architecture and delivery, I’d be glad to help.



Steps for completing your project

After purchasing the project, send requirements so Mariya can start the project.

Delivery time starts when Mariya receives requirements from you.

Mariya works on your project following the steps below.

Revisions may occur after the delivery date.

Discussion and Planning.

Development.

160 hours of custom front end development.

Review the work, release payment, and leave feedback to Mariya.