You will get High-Performance WEB Platform & SAAs
Rising Talent
Rising Talent
Project details
I deliver production-ready, heavy-duty web applications, secure SaaS platforms, and advanced AI integrations built specifically for high-load performance. While many developers focus on basic landing pages, I specialize in architecting complex, data-dense systems that process thousands of live data points flawlessly without UI lag.
By combining an enterprise-grade stack (React, Next.js, TypeScript, and Nest.js) with strict data validation and rigorous compliance standards (GDPR/HIPAA), I build software engineered for the US and European markets. I treat your project as a scalable business product, ensuring clean architecture that minimizes technical debt and allows your team to maintain and scale the application seamlessly as you grow.
By combining an enterprise-grade stack (React, Next.js, TypeScript, and Nest.js) with strict data validation and rigorous compliance standards (GDPR/HIPAA), I build software engineered for the US and European markets. I treat your project as a scalable business product, ensuring clean architecture that minimizes technical debt and allows your team to maintain and scale the application seamlessly as you grow.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, Performance OptimizationWhat's included $4,999
These options are included with the project scope.
$4,999
- Delivery Time 20 days
- Number of Revisions 0
- Design Customization
- Content Upload
- Responsive Design
- Source Code
About Valeriia
Front-End Developer | React, Next.js & TypeScript Expert
Vysokyi, Ukraine - 8:14 pm local time
I am a Senior Full-Stack Developer specializing in React, Next.js, and TypeScript. I don’t just build basic landing pages—I architect heavy-duty, data-dense web platforms, secure SaaS products, and custom AI integrations for clients across the US and Europe.
Whether you need to process thousands of live data points per second or build a highly secure, GDPR-compliant portal, I deliver clean, scalable code that performs flawlessly under load.
🚀 What I Do Best:
High-Performance Frontends: Expert-level Next.js, React, and TypeScript. I build complex dashboards, interactive charting, customized data grids, and fluid, responsive UIs.
Real-Time & Financial Logic: Deep experience building WebSockets-driven trading platforms, enterprise ERP accounting systems (multi-currency/tax validation), and investment fund calculators.
HealthTech & Booking Marketplaces: Developing secure, GDPR/HIPAA-compliant Telehealth apps (WebRTC video), digital prescription workflows, and multi-tenant scheduling engines for the medical beauty/aesthetics industry.
Robust Backends & AI Agents: Scaling backends using Node.js, Express, and Nest.js, and integrating intelligent AI customer service agents to automate your workflows.
🛠️ My Core Tech Stack:
Frontend: React, Next.js, TypeScript, Redux Toolkit, Zustand, TailwindCSS
Backend & Database: Node.js, Nest.js, Express, PostgreSQL, MongoDB, RESTful APIs, WebSockets
Integrations: AI Agents/Chatbots, Stripe/Adyen, Twilio/Agora (WebRTC), TradingView/D3.js
🤝 Why Clients Work With Me:
I treat your project like a business product, not just a Jira ticket. I focus heavily on frontend optimization (preventing UI lag during high data throughput), strict data validation, and clean architecture that your team can easily maintain later.
Have a project that requires serious technical execution?
Steps for completing your project
After purchasing the project, send requirements so Valeriia can start the project.
Delivery time starts when Valeriia receives requirements from you.
Valeriia works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Architecture Alignment
We review your technical requirements, API specs, and target user workflows. I map out the database schema, state management structure, and secure integration touchpoints (like Stripe or AI workflows) to ensure a rock-solid foundation
Milestone-Driven Development
Development begins using Next.js, TypeScript, and a clean backend structure. I focus heavily on frontend optimization, robust data validation, and real-time logic. You will receive transparent, regular updates as each milestone is hit.