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Vitalii S.

Vitalii S.

Senior Software Engineer

🌟 Hi there! 🚀 I’m a Software Engineer with 8+ years of experience building scalable, high-performance applications for web, cloud, and AI-powered solutions. 💼 Skills & Expertise: • Languages & Core Tech: JavaScript, TypeScript, ELM, HTML, CSS (SCSS, LESS), Web Components • Frontend Frameworks: React, Next.js (incl. SSR), Angular • Backend & APIs: Node.js (Express, Hapi, NestJS) • Databases & Search: MongoDB, PostgreSQL, SQL, ElasticSearch • DevOps & CI/CD: Docker, Kubernetes, Jenkins, GitHub Actions • Specialized: Chrome Extension Development, Microservices, Micro-frontends • AI & Emerging Tech: LLM integrations, LangChain, AI-powered applications, ChatGPT API 🔍 About Me: I’m passionate about creating innovative, reliable, and future-proof software solutions. Whether it’s a high-traffic web platform, an AI-driven feature, or a custom extension, I thrive on projects that demand cutting-edge technology and forward-thinking design. 💡 Personal Focus: I’m especially passionate about health, fitness, and performance-tracking applications — projects that help people live better and train smarter. I’m genuinely inspired by technologies like Garmin, Whoop, Strava, and HealthKit, and I enjoy building solutions that combine data, design, and motivation to make a real impact on users’ well-being. With a track record of successful long-term collaborations on Upwork, I bring not only technical expertise but also proven reliability. My goal is to transform your ideas into reality with clean code, smart architecture, and a touch of creativity.

🇺🇦Kyiv, Ukraine$30/hr100% JSS5.00 (8)Since Sep 2016

Earnings and projects

MRR
$0

Last 6 months ÷ 6

World#136,379 / 412k
🇺🇦Country#6,805 / 14.3k
Revenue, last 30 days
$0
Total earnings
$21k

Billed in all: $22k

World#136,379 / 412k
🇺🇦Country#6,805 / 14.3k
Per project
$1.4k
Projects, last 6 months
0
World#209,850 / 412k
🇺🇦Country#7,324 / 14.3k
Projects in all
15

Across 16 contracts

44% fixed56% hourly
World#161,377 / 412k
🇺🇦Country#6,688 / 14.3k

Earnings, last 30 days

$21.7kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$21,250$21,500$21,750$22,000Oct 8Oct 23Nov 7

Skills