Sadam M.
VWO | AB Test Developer | CRO Developer | Growthbook
✨ Certified A/B Testing & CRO Developer | 4000+ Experiments | 7+ Years I help businesses, CRO agencies, and digital teams build and implement high-performing A/B tests that improve conversion rates and user experience. With 7+ years of frontend development experience and 1,500+ A/B tests successfully implemented, I combine strong development skills with a solid understanding of CRO, experimentation, UX, and conversion-focused development. 1. A/B Testing & CRO Expertise • 1,500+ A/B tests developed and implemented • Custom A/B test development and variation building • Conversion-focused landing page optimization • Audience targeting and personalization • Goal, event, and conversion tracking • Experiment troubleshooting and debugging • Pixel-perfect implementation from Figma/designs • Responsive and cross-browser testing 2. CRO Platforms Optimizely | VWO | AB Tasty | Adobe Target | Convert | Dynamic Yield | Kameleoon | Google Optimize | Crazy Egg | Marketo 3. Frontend Development HTML5 | CSS3 | JavaScript | jQuery | React | Angular | Vue.js | Shopify I can work directly with your existing website, design, analytics setup, or CRO platform to implement experiments accurately without compromising the existing user experience. 4. Why Clients Work With Me • 7+ years of frontend development experience • 1,500+ A/B tests implemented • Experience supporting CRO agencies and international teams • Strong understanding of both development and conversion optimization • Comfortable with simple experiments as well as complex custom implementations • Clean, maintainable code with accurate tracking Whether you need a developer to implement A/B tests in Optimizely, VWO, AB Tasty, or another platform, optimize a landing page, build custom experiment variations, fix tracking issues, or support your ongoing CRO program, I’m ready to help. Let’s turn your website traffic into measurable growth. Sadam
Earnings and projects
Last 6 months ÷ 6
Read daily since Oct 16, under 30 days
Billed in all: $21,066$21k
$24 in the last 6 months
Across 10 contracts
Earnings, last 30 days
Tracked from Oct 16, 2026.
Skill rankings: Top 29% in jQuery
Ranked by MRR among everyone on Upwork with the skill.
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