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Sergey Y.
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Sergey Y.

AI-Powered Full Stack Developer | NestJS, React, Node.js, Python, n8n

I’m a Full Stack Developer with 4+ years of experience building AI-driven, modern, and scalable web applications. My expertise lies in combining artificial intelligence, automation, and robust full-stack development to deliver smart, efficient, and production-ready solutions. 🤖 AI & Automation Expertise: AI integration using OpenAI API, LangChain, and custom model pipelines Workflow automation with n8n, Python scripts, and API orchestration Intelligent chatbots, AI assistants, and content automation tools AI-driven data analysis and decision-support systems 💻 Full Stack Development: Backend: NestJS, Node.js, Express.js, Python (FastAPI, automation scripts) Frontend: React, Next.js, Redux (RTK Query), Material UI, CSS Modules Databases: PostgreSQL, MongoDB, Prisma ORM, Mongoose Architecture: REST API, CQRS, JWT, OAuth2 DevOps: Docker, GitHub Actions, Linux (Ubuntu), CI/CD pipelines ✅ What I do best: Integrate AI models into real business workflows Build scalable APIs and microservices Create responsive and high-performance front-end interfaces Automate complex tasks and optimize business operations Maintain clean architecture, documentation, and DevOps processes 🎯 My focus: Delivering real value through AI-powered automation and high-quality software engineering. I’m passionate about building modern, intelligent systems that improve performance, productivity, and user experience. Let’s build something smarter together! 🚀

🇺🇦Kharkiv, Ukraine$40/hr100% JSS4.02 (2)Since Mar 2025

Earnings and projects

MRR
$5.4k

Last 6 months ÷ 6

World#4,737 / 412k
🇺🇦Country#320 / 14.3k
Revenue, last 30 days
$0

Last 6 months: $32k

Total earnings
$82k

Billed in all: $85k

World#48,686 / 412k
🇺🇦Country#3,135 / 14.3k
Per project
$27k

$11k in the last 6 months

World#3,493 / 412k
🇺🇦Country#318 / 14.3k
Projects, last 6 months
3
0% fixed100% hourly
World#66,479 / 412k
🇺🇦Country#2,681 / 14.3k
Projects in all
3
0% fixed100% hourly
World#304,140 / 412k
🇺🇦Country#11,447 / 14.3k

Earnings, last 30 days

$84.6kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$83k$84k$85k$86kOct 8Oct 23Nov 7

Skill rankings: Top 2% in Web Development

Ranked by MRR among everyone on Upwork with the skill.

  1. #86Product Development3,593 freelancers · 🇺🇦 #5Top 2%
  2. #192Web Application9,341 freelancers · 🇺🇦 #28Top 2%
  3. #422Web Development25,055 freelancers · 🇺🇦 #53Top 2%