You will get Full Stack Developer will estimate your project

Name: You will get Full Stack Developer will estimate your project
Availability: InStock

Vasyl K. Vasyl K.

5.0

Top Rated

Vasyl K. Vasyl K.

5.0

Top Rated

Project details

Programming Languages

HTML & CSS, JavaScript, TypeScript

Coding Expertise

Cross Browser & Device Compatibility, Performance Optimization, Security

What's included $50

These options are included with the project scope.

$50

Delivery Time 2 days
Number of Revisions 0
Number of Pages 0

5.0

20 reviews

100% Complete

(20)

1% Complete

(0)

1% Complete

(0)

1% Complete

(0)

1% Complete

(0)

Full-stack developer to create PWA application React + Express from Knack Vasyl is amazing to work with and will be using him for all my full-stack projects! He goes the extra mile in ways I would have never thought of make my customers experiences special!

Create a webapp with youtube API Vasyl did a great job from start to finish. Communication was clear, delivery was fast, and the quality was exactly what was needed. What really stood out was how genuinely interested he was in the project. He asked smart questions, suggested improvements, and treated it like more than “just a task.” Would happily work with him again and definitely recommend.

Enhanced Deepfake Quiz for Use at Offline Events

React expert for quick bug fixing Very professional freelancer, went beyound our expectations. Definetely will hire again.

Full stack developer for separate version of quiz app Vasyl delivered great work on our recent project. The final output met a high professional standard, was completed on schedule, and required no revisions — a rare and impressive outcome.

His ability to deliver exactly what was needed, with precision and reliability, made the entire process seamless. We were very pleased with the results and would gladly work with Vasyl again.

About Vasyl

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AI Application Development | App Developer with AI | AI Integrator

100% Job Success

5.0 (20 reviews)

Kyiv, Ukraine - 11:48 am local time

I'm a full stack developer specializing in AI Application Development with 8+ years of experience building web applications, SaaS platforms, and WordPress solutions. As an App Developer with AI at the core of my stack, and as an AI Integrator who plugs intelligence into existing products, I help startups, agencies, and growing businesses turn ideas into reliable, scalable AI-powered systems. The result: faster time-to-market, lower costs, and software that grows with your business.

AI Application Development | App Developer with AI | AI Integrator | Building Powerful, Scalable Applications

I've delivered 100+ projects across web, SaaS, and AI Application Development. I've shipped 20+ production web applications and launched 15+ multi-tenant platforms that scale from day one. As an experienced App Developer with AI, I bring the complete package - React, Python, machine learning, and front-end skills, everything needed to launch and grow your product.

WHY CHOOSE ME

My approach to AI Application Development covers the complete spectrum of building intelligent products, with development cycles up to 3x faster than typical timelines. As an App Developer with AI, I've shipped features that real users rely on every day, and as an AI Integrator I've connected LLMs, APIs, and automation into products that were never designed for them. As a web developer, I've cut load times by up to 60% on the sites I've optimized.

FRONTEND EXCELLENCE

As a dedicated React developer and front-end developer, I create interfaces users love:

• React, Next.js, TypeScript, Redux - dynamic UIs with 2x faster rendering
• Component-based architecture - 200+ reusable components
• Mobile-first compatibility and web design that converts

BACKEND ENGINEERING

My backend proficiency ensures secure, scalable apps:

• Node.js, Express.js, Python - APIs with 99.9% uptime
• MongoDB, PostgreSQL, MySQL - sub-50ms query times
• Prisma, Sequelize, Knex.js

I make sure the backend matches frontend quality - the foundation every intelligent product needs.

AI AND INTELLIGENT FEATURES

My AI Application Development work, and my day-to-day as an App Developer with AI, includes:

• LLM integration - OpenAI, Anthropic, and open-source models
• Natural language processing and chat interfaces
• Machine learning pipelines in production
• RAG, embeddings, and vector search

As an AI Integrator, I specialize in wiring these capabilities into products that already exist, with no rebuild required.

MOBILE AND CROSS-PLATFORM

As a mobile app developer, I deliver:

• React Native for iOS and Android
• Progressive Web Apps with offline capabilities
• Cross-platform solutions reducing development time by 50%

WORDPRESS AND CMS

• Custom theme and plugin development
• WooCommerce e-commerce solutions
• Performance optimization achieving 90+ PageSpeed scores

SAAS DEVELOPMENT AND INFRASTRUCTURE

I bring scale-ready infrastructure to every build:

• Docker and Kubernetes - 75% faster deployment
• CI/CD pipelines - catching 90% of issues early
• AWS, Vercel, DigitalOcean expertise
• Multi-tenant architecture design

I've designed multi-tenant systems that handle 10,000+ accounts without a drop in performance, every AI Application Development project built to scale. As an AI Integrator, I keep your AI workloads fast and cost-efficient under real traffic.

ADVANCED FEATURES

• WebSockets - real-time updates within 100ms
• Redis caching - 30x faster response times
• Stripe integration, OAuth2, JWT authentication

As an AI Integrator, I wire analytics and automation together so growth tracking is intelligent from launch, not bolted on later.

SERVICES I OFFER

• AI Application Development, intelligent features in production
• App Developer with AI, end-to-end product builds
• AI Integrator, intelligence added to existing systems
• Web and SaaS development, React, WordPress, mobile apps
• MVP development, 40% faster time-to-market
• API design, 50% faster integration

YOUR PROJECT DESERVES COMMITMENT

When you hire me, you get:

• 2-hour response time during working hours
• 100% client satisfaction across 100+ completed projects
• A professional App Developer with AI fully invested in your outcome

LET'S BUILD SOMETHING EXTRAORDINARY

I deliver measurable results in AI Application Development that has helped 50+ clients ship products that grow. As an experienced App Developer with AI and a proven AI Integrator, I'd love to discuss your project.

Steps for completing your project

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

Delivery time starts when Vasyl receives requirements from you.

Vasyl works on your project following the steps below.

Revisions may occur after the delivery date.

Review of project and call.

After reviewing info about project and call with you I will prepare detailed estimation of a project.

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

What's included $50

Delivery Time 2 days
Number of Revisions 0
Number of Pages 0

2 days delivery — Jul 7, 2026

Revisions may occur after this date.

Upwork Payment Protection

Fund the project upfront. Vasyl gets paid once you are satisfied with the work.

You will get Full Stack Developer will estimate your project

Let a pro handle the details

Let a pro handle the details

Project details

Programming Languages

Coding Expertise

What's included $50

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About Vasyl

AI Application Development | App Developer with AI | AI Integrator

Steps for completing your project

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

Vasyl works on your project following the steps below.

Review of project and call.

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

What's included $50