You will get Front End Developer for AI / Fintech Project | React Developer | Next.js
Top Rated
Project details
I’m a seasoned Front End Developer, React Developer with 9+ years of experience, specializing in fast, responsive web apps for AI and fintech projects. I use Next.js, React.js, and JavaScript to build smooth, scalable applications, ensuring clean, maintainable code for optimal performance 🚀.
💼 What I’ve Done:
• Developed high-performance fintech projects and e-commerce platforms as a Next.js Developer, enhancing functionality and user experience.
• Integrated APIs for real-time data and secure payments, crucial for fintech.
• Optimized frontend development for responsiveness, intuitive navigation, and efficiency.
💼 How I Can Help:
If you need a Next.js Developer to review code, troubleshoot, or start a fintech project, I bring efficiency and expertise in frontend development to deliver scalable, user-friendly solutions.
❗ Before we start: Share your design needs through Upwork Direct message! 📞
⭐ I perform User Research and Competitive Analysis to define your Unique Selling Proposition (USP), creating standout frontend development for your fintech project.
💬 Ready to elevate your project? Let’s turn your Next.js and frontend development ideas into reality!
💼 What I’ve Done:
• Developed high-performance fintech projects and e-commerce platforms as a Next.js Developer, enhancing functionality and user experience.
• Integrated APIs for real-time data and secure payments, crucial for fintech.
• Optimized frontend development for responsiveness, intuitive navigation, and efficiency.
💼 How I Can Help:
If you need a Next.js Developer to review code, troubleshoot, or start a fintech project, I bring efficiency and expertise in frontend development to deliver scalable, user-friendly solutions.
❗ Before we start: Share your design needs through Upwork Direct message! 📞
⭐ I perform User Research and Competitive Analysis to define your Unique Selling Proposition (USP), creating standout frontend development for your fintech project.
💬 Ready to elevate your project? Let’s turn your Next.js and frontend development ideas into reality!
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included $18,000
These options are included with the project scope.
$18,000
- Delivery Time 60 days
- Number of Revisions 9
37 reviews
(36)
(1)
(0)
(0)
(0)
This project doesn't have any reviews.
AB
Alex B.
May 17, 2026
Full Stack Developer for Clinical Platform
I’ve never seen such a high level of professionalism, strong communication, and attention to detail. I will definitely continue working together in the future.
AN
Andriy N.
May 8, 2026
Senior Full Stack Developer needed - AI Healthcare Platform
Igor did a great job improving our platform. He quickly resolved bugs, fixed data flow issues, and helped improve overall platform stability and performance.
Communication was smooth, delivery was on time, and the quality of work was excellent. Highly recommend and would gladly work together again.
Communication was smooth, delivery was on time, and the quality of work was excellent. Highly recommend and would gladly work together again.
AN
Andriy N.
Mar 7, 2026
Front End Developer React Developer
Igor is a great Front End developer. He delivered everything on time and with excellent quality. Communication was smooth and professional throughout the project. Highly recommended!
KM
Keith M.
Feb 10, 2026
30 minute consultation
EC
Ed C.
Dec 18, 2025
Prototype Designer/Developer for Thai Language Learning Game (Browser-Based)
About Igor
Front End Developer | React Developer | Full Stack Developer | AWS
100%
Job Success
Zaporizhzhia, Ukraine - 12:10 am local time
🔥 49 COMPLETED JOBS WITH ZERO NEGATIVE FEEDBACK
⭐️ Consistent 5-STAR REVIEWS & LONG-TERM CLIENT PARTNERSHIPS
💼 $200K+ earned on Upwork | ⏱ 8,000+ hours delivered | 🏆 100% Job Success Rate
🌍 40+ products shipped across 18+ countries | 🏅 15+ long-term client partnerships
Building a serious product takes more than a polished UI — it takes a Full Stack Developer who understands architecture, scalability, and business impact. I'm a senior Front End Developer and Full Stack Developer with 9+ years building high-performance web apps, SaaS platforms, landing pages, and mobile apps for startups and growth-stage companies with React, Next.js, and Node.js. I keep frontend and backend tightly integrated so every decision serves the business.
📊 Impact & Metrics
Products I've shipped serve 10K–100K+ monthly actives and handle 5M+ API requests/month. As a Front End Developer and React Developer I've cut load times 40–60%, lifted conversions 20–35%, and dropped bounce rates 25%+. Recent work: organic traffic +62%, TTI 2–3x faster, and a dashboard rebuild that grew weekly actives from 4K to 18K (+350%) in 4 months.
🏗 Architecture & Scalable Systems
As a React Developer I design scalable component systems with Redux or Zustand; with Next.js I build hybrid rendering — SSR, SSG, ISR, API routes — tuned for performance and SEO. As a Full Stack Developer I work in Node.js, ExpressJS, and Python (Django, FastAPI), building REST APIs across PostgreSQL, MySQL, MongoDB, and Supabase, with WebSockets, Docker, and CI/CD on AWS or Vercel cutting release times 50%+. Modular patterns reduce technical debt and bug rates 30–40%.
🤖 AI Development & Intelligent Systems
I build production-ready AI apps and agents with the OpenAI API and Claude, connecting LLMs to real product needs, not demos. As a Full Stack Developer and React Developer, I ship conversational interfaces, multi-step reasoning pipelines, ML features inside existing platforms, and AI-powered dashboards that save teams 15–25 hours/week.
📱 Mobile App Development
Beyond the web, I build cross-platform apps with React Native for Android and iOS, sharing logic with the web codebase to cut delivery time up to 40%. As a Front End Developer who treats mobile as a first-class surface, I've shipped apps holding 4.5★+ store ratings.
🎨 Design-to-Code & Website Builds
I turn Figma and Framer designs into pixel-perfect, responsive interfaces with Tailwind CSS and SCSS — landing pages, full websites, or redesigns, always polished and fast. As a Front End Developer I consistently hit Lighthouse 95+ and median LCP under 1.8s.
📈 Business-Oriented Engineering
As a React Developer I've refactored unstable React codebases into maintainable systems, shipped Next.js platforms that grew organic acquisition, built Stripe subscription and marketplace flows, and handled API integration, cutting infra overhead 20–30%. One Full Stack Developer engagement took a signup funnel from 90 to 240/month (+165%) while halving server costs.
⚡ Performance & Optimization
I treat Core Web Vitals like LCP and TTI as real product metrics, getting them 2–3x faster through code splitting, lazy loading, caching, and SSR/ISR/static rendering. As a Front End Developer obsessed with speed, I've taken pages from 6s+ to sub-2s, lifting conversion +38% and cutting bounce 25%+.
🔧 Primary Stack
Frontend: React.js, Next.js, TypeScript, Redux, Zustand, Tailwind CSS, SCSS, Framer. Backend: Node.js, ExpressJS, Python (Django, FastAPI), REST, GraphQL, WebSockets. AI: OpenAI API, Claude, custom ML. Mobile: React Native, native Android. Infra: AWS, Vercel, Docker, CI/CD, PostgreSQL, MySQL, MongoDB, Redis, Supabase. Need a React Developer for a complex SPA or a Full Stack Developer to own the whole product? The stack flexes to fit.
💡 Data-Backed Results at a Glance
✅ 60% faster load times via Next.js rendering & caching
✅ 35% increase in conversion rates through funnel-focused Front End Developer work
✅ 350% growth in active users on a React Developer dashboard rebuild
✅ 62% lift in organic traffic via SEO-optimized SSR/SSG
✅ 50% shorter release cycles after CI/CD automation
✅ 40% reduction in mobile delivery time through shared React Native logic
✅ 30% drop in technical debt and bugs via modular components
✅ 25% lower bounce rates after Core Web Vitals work
✅ 165% more signups on a Stripe SaaS funnel rebuild
✅ 95+ Lighthouse scores with sub-1.8s LCP
🤝 How I Work
I stay product-focused, build clean, scalable architecture from day one, and iterate fast without piling up technical debt. As a Front End Developer and Full Stack Developer who's partnered with 40+ founders, CTOs, and product teams, I prefer long-term partnerships over one-off gigs. Looking for a React Developer who thinks in products, not tickets? Let's talk.
Steps for completing your project
After purchasing the project, send requirements so Igor can start the project.
Delivery time starts when Igor receives requirements from you.
Igor works on your project following the steps below.
Revisions may occur after the delivery date.
Direct message
Initial call