Skip to content
BackNov 7
SERGEJ B.
Upwork badge

SERGEJ B.

Senior WordPress Engineer | WooCommerce & Custom Development | React |

I help businesses build fast, scalable, and easy-to-manage WordPress websites that drive results. Over the past 7+ years, I've delivered custom WordPress solutions for startups, agencies, and growing businesses—from company websites to large WooCommerce stores and complex custom functionality. I don't just write code—I solve business problems. My goal is to deliver reliable solutions that are easy to maintain, perform well, and continue to support your business long after launch. Highlights ✅ 7+ years of WordPress development experience ✅ 58 completed projects with a 100% Job Success score ✅ Built and optimized 10+ WooCommerce stores ✅ Improved website speed by up to 30% through performance optimization and caching What I can help you with ✅ WordPress Development ✅ Custom WordPress themes ✅ Custom WordPress plugins ✅ Advanced Custom Fields (ACF) ✅ Gutenberg & Block development ✅ WordPress REST API ✅ WordPress Multisite ✅ Website maintenance & bug fixing ✅ WooCommerce Development ✅ Custom checkout experiences ✅ Payment gateway integrations (Stripe and others) ✅ Product management systems ✅ Subscription & membership functionality ✅ Store optimization & scaling ✅ Custom WooCommerce extensions ✅ Performance & Optimization ✅ Core Web Vitals optimization ✅ Website speed optimization ✅ Caching configuration ✅ Database optimization ✅ Security hardening ✅ SEO-friendly development ✅ Modern Web Development ✅ React & Next.js integration with WordPress ✅ Headless WordPress ✅ REST APIs ✅ MySQL & PostgreSQL ✅ AWS (EC2, S3, CloudFront, Route53) ✅ Docker & CI/CD Why clients work with me ✅ Clear and proactive communication ✅ Clean, maintainable, and well-documented code ✅ Reliable delivery and realistic timelines ✅ Long-term support after launch Many of my clients continue working with me for months or even years because I focus on building solutions that grow with their business—not quick fixes that need rebuilding later. If you're looking for a WordPress developer who can build custom functionality, optimize performance, and deliver production-ready websites, I'd be happy to discuss your project.

🇺🇦Kryvyy Rih, Ukraine$35/hr100% JSS4.93 (40)Since Dec 2015

Earnings and projects

MRR
$17

Last 6 months ÷ 6

World#166,638 / 412k
🇺🇦Country#5,926 / 14.3k
Revenue, last 30 days
$0

Last 6 months: $104

Total earnings
$59k

Billed in all: $61k

World#66,332 / 412k
🇺🇦Country#3,955 / 14.3k
Per project
$1k

$21 in the last 6 months

World#122,758 / 412k
🇺🇦Country#5,652 / 14.3k
Projects, last 6 months
5
20% fixed80% hourly
World#41,746 / 412k
🇺🇦Country#1,797 / 14.3k
Projects in all
58

Across 65 contracts

68% fixed32% hourly
World#52,574 / 412k
🇺🇦Country#2,473 / 14.3k

Earnings, last 30 days

$60.8kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$59k$60k$61k$62kOct 8Oct 23Nov 7

Skill rankings: Top 34% in JavaScript

Ranked by MRR among everyone on Upwork with the skill.

  1. #335Advanced Custom Fields Plugin555 freelancers · 🇺🇦 #32Top 60%
  2. #1,193WordPress Bug Fix2,262 freelancers · 🇺🇦 #55Top 53%
  3. #1,260WordPress Migration2,167 freelancers · 🇺🇦 #54Top 58%
  4. #2,125WordPress e-Commerce5,046 freelancers · 🇺🇦 #62Top 42%
  5. #2,207WordPress Theme4,985 freelancers · 🇺🇦 #135Top 44%
  6. #2,309REST API5,062 freelancers · 🇺🇦 #150Top 46%
  7. #3,806WordPress Development8,209 freelancers · 🇺🇦 #150Top 46%
  8. #5,609WooCommerce12,214 freelancers · 🇺🇦 #247Top 46%