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Roman S.
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Roman S.

Full-Stack Developer | CloudFlare Workers & GPT Integration Expert

Are you looking for a reliable, senior dev to integrate AI or blockchain payment systems into your app? I am certified full Stack Developer with 10+ years of experience building scalable web applications and services using modern JS stacks like CloudFlare Workers, GPT APIs, and BTCPay Server. Proficient in PHP, JavaScript, TypeScript, React, Vue, Node, and cloud platforms like AWS and CloudFlare. Adept at designing robust APIs, implementing DevOps practices, and collaborating with cross-functional teams to deliver high-impact solutions.

🇺🇦Zaporozhye, Ukraine$35/hr100% JSS4.95 (51)Since Jul 2011
GlobeUpwork

Earnings and projects

MRR
$5.9k

Last 6 months ÷ 6

World#4,007 / 412k
🇺🇦Country#258 / 14.3k
Revenue, last 30 days
—

Read daily since Oct 20, under 30 days

Total earnings
$613k

Billed in all: $627k

World#1,783 / 412k
🇺🇦Country#155 / 14.3k
Per project
$7.9k

$7k in the last 6 months

World#21,336 / 412k
🇺🇦Country#1,448 / 14.3k
Projects, last 6 months
5
20% fixed80% hourly
World#41,746 / 412k
🇺🇦Country#1,797 / 14.3k
Projects in all
78

Across 91 contracts

31% fixed69% hourly
World#37,797 / 412k
🇺🇦Country#1,774 / 14.3k

Earnings, last 30 days

$627k+$3.1k earned since Oct 20Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$622k$624k$626k$628kOct 20Oct 29Nov 7

Tracked from Oct 20, 2026.

Skill rankings: Top 1% in Bootstrap

Ranked by MRR among everyone on Upwork with the skill.

  1. 3SuiteCRM111 freelancers · 🇺🇦 #1Top 3%
  2. #8Moodle450 freelancers · 🇺🇦 #1Top 2%
  3. #22AJAX2,006 freelancers · 🇺🇦 #3Top 1%
  4. #48AI Model Integration1,618 freelancers · 🇺🇦 #3Top 3%
  5. #69Bootstrap6,899 freelancers · 🇺🇦 #19Top 1%
  6. #98Git5,766 freelancers · 🇺🇦 #22Top 2%
  7. #100jQuery8,973 freelancers · 🇺🇦 #21Top 1%
  8. #155API7,943 freelancers · 🇺🇦 #22Top 2%