You will get backend developer / backend engineer / node developer
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šØ THE PRICE BELOW IS A PLACEHOLDER šØ
ā Every project is unique - send me your project details first and you'll get an exact, custom quote before you order anything. Let's scope it together. š
As a backend developer with 8+ years of experience, I design APIs and databases that stay stable as traffic grows. Working as a backend engineer and node developer, I have scaled apps from a few hundred to 50,000+ monthly users. On one project I cut average API response time from 850ms to 120ms.
backend developer / backend developer / backend developer
ā Every project is unique - send me your project details first and you'll get an exact, custom quote before you order anything. Let's scope it together. š
As a backend developer with 8+ years of experience, I design APIs and databases that stay stable as traffic grows. Working as a backend engineer and node developer, I have scaled apps from a few hundred to 50,000+ monthly users. On one project I cut average API response time from 850ms to 120ms.
backend developer / backend developer / backend developer
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $50
These options are included with the project scope.
$50
- Delivery Time 1 day
- Number of Revisions 0
- Number of Pages 1
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Dmytro A.
Aug 18, 2026
30 minute consultation
Excellent Full Stack JavaScript Developer. The consultation was clear and
immediately actionable, covering full-stack project delivery end to end. His
guidance on AI API Integration was sharp and practical, and his AI Web Scraping
advice gave me a concrete plan to follow. Fast communication and business-minded
throughout. Highly recommended, will hire again.
immediately actionable, covering full-stack project delivery end to end. His
guidance on AI API Integration was sharp and practical, and his AI Web Scraping
advice gave me a concrete plan to follow. Fast communication and business-minded
throughout. Highly recommended, will hire again.
DS
Dmytro S.
Aug 17, 2026
Full Stack JavaScript Developer needed
Vasyl is a sharp Full Stack JavaScript Developer. Small fix on our app - understood the code instantly and shipped a clean fix fast. Will hire again for AI API Integration work in future.
DJ
Dan J.
Aug 10, 2026
WordPress Expert for Roofing Website
Truly exceptional! I was extremely pleased with the work and communication. I will definity use again. A great team player. Highly recommend.
BL
Bob L.
Mar 8, 2026
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!
KH
Krisjanis H.
Jan 6, 2026
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 ājust a task.ā Would happily work with him again and definitely recommend.
About Vasyl
Full Stack JavaScript Developer / AI API Integration / AI Web Scraping
100%
Job Success
Kyiv, UkraineĀ - 10:40 pm local time
As a Full Stack JavaScript Developer I've delivered 100+ projects across web, SaaS, AI API Integration, and AI Web Scraping, including 20+ production web applications and 15+ multi-tenant platforms that scaled from day one. I bring the complete package - React, Node.js, Python, and modern front-end skills, everything needed to launch and grow your product.
WHY CHOOSE ME
Hiring a senior Full Stack JavaScript Developer means development cycles up to 3x faster than typical timelines. My AI API Integration experience has connected LLMs, third-party APIs, and automation into products that were never designed for them, shipping 25+ such features into production. My AI Web Scraping systems collect 1M+ records a day while cutting manual data work by up to 90%, and on the sites I've optimized I've cut load times by up to 60%. My roots go wider than one stack: as a full stack java developer I shipped 10+ enterprise backends, and as a wordpress developer I've built and rescued 50+ WordPress sites hitting 90+ PageSpeed scores.
FRONTEND ENGINEERING
As a Full Stack JavaScript Developer I've built 200+ reusable components that keep interfaces fast and consistent. Users love them, and my front ends render up to 2x faster than the versions they replaced.
ā¢ React, Next.js, TypeScript, Redux - dynamic UIs with 2x faster rendering
ā¢ Component-based architecture - 200+ reusable components
ā¢ Mobile-first, conversion-focused web design
BACKEND ENGINEERING
As a Full Stack JavaScript Developer I've built APIs that hold 99.9% uptime under real load. My AI API Integration work keeps response times under 200ms even with LLM calls in the loop, and I've delivered 100+ api integrations across payment, CRM, and data providers.
ā¢ Node.js, Express.js, Python - APIs with 99.9% uptime
ā¢ MongoDB, PostgreSQL, MySQL - sub-50ms query times
ā¢ Prisma, Sequelize, Knex.js
AI AND INTELLIGENT FEATURES
As a Full Stack JavaScript Developer I've wired AI into 30+ existing products with no rebuild required. My AI API Integration work covers the full stack of intelligent features, with 50+ AI API Integration builds shipped to production. As a no code developer I've also automated 60+ workflows in Zapier and Make, saving clients 20+ hours a week.
ā¢ LLM integration - OpenAI, Anthropic, and open-source models
ā¢ Natural language processing and chat interfaces
ā¢ Machine learning pipelines in production
ā¢ RAG, embeddings, and vector search
DATA AND AI WEB SCRAPING
My AI Web Scraping stack has powered 40+ data projects with 99% extraction accuracy. My AI Web Scraping pipelines adapt to layout changes and bypass 95% of anti-bot blocks, so they keep running when others break.
ā¢ Playwright, Puppeteer, and Scrapy at scale - 1M+ pages crawled per run
ā¢ Structured extraction, deduplication, and scheduled refresh
ā¢ Anti-bot handling with 95%+ success on protected targets
SAAS AND INFRASTRUCTURE
My AI Web Scraping workloads run on schedule and process 10M+ records a month without downtime. I bring the same scale-ready infrastructure to every build:
ā¢ Docker and Kubernetes - 75% faster deployment
ā¢ CI/CD pipelines - catching 90% of issues early
ā¢ AWS, Vercel, DigitalOcean expertise
ā¢ Multi-tenant systems handling 10,000+ accounts without a drop in performance
ADVANCED FEATURES
ā¢ WebSockets - real-time updates within 100ms
ā¢ Redis caching - 30x faster response times
ā¢ Stripe integration, OAuth2, JWT authentication
WHAT YOU GET
ā¢ 2-hour response time during working hours
ā¢ 100% client satisfaction across 100+ completed projects
ā¢ A developer fully invested in your outcome
LET'S BUILD SOMETHING GREAT
As a Full Stack JavaScript Developer I've helped 50+ clients ship products that grow, my AI API Integration work has added measurable value to 30+ of them, and my AI Web Scraping systems have saved teams 1,000+ hours of manual research. 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.
Message me with your project details
You send me a short description of what you want to build, your stack and timeline. I reply with an exact price and a clear plan - before you order anything.