A frontend dev,
measuring his work.
Mainul Islam, 2026roles & projects
& Frontend
I'm a frontend developer working remotely since 2019.
My focus is frontend you can measure: building reliable A/B tests and conversion experiments for real businesses. I started in freelance frontend work and moved steadily toward experimentation, the part of the job where you can prove whether a change actually worked. Over the last few years, that adds up to 500+ A/B tests shipped across ecommerce and SaaS — alongside frontend builds for startups and individuals across the UK, India, Slovakia, Austria, Australia, and Canada.
I've been a frontend A/B testing developer with Conversion.com for 4+ years, building production tests on enterprise platforms. Now actively open to new opportunities, full-time remote or contract.
On how I work: everyone uses AI now, the skill is using it well enough to actually finish what you start. I treat Claude Code like a junior engineer who needs a clear spec, the right context, a tight scope, and an honest review pass. That workflow is what made a solo, full-stack experimentation platform finishable in 1.5 years, including 2 earlier versions I scrapped, and a year+ of planning and architecture, banked on what those false starts taught me.
What I build with.
Core
AI as co-engineer
Styling
Experimentation
Backend, data & CMS
Tooling & PM
Where I've worked.
Outside of code.
Outside of work I run a YouTube channel for quiet travel videos. I'm drawn to mountains and the sea — anywhere a little further from the screen.
Want the
long version?
Every role, the stack, and a few projects worth a closer look. Read online, save as a PDF, or just share the link.