Mainul Islam · Frontend Developer
Portfolio v3 · 2026
7 yrs · 9+ countries

Frontend

Developer
& Experiments

I build frontend and run A/B tests that turn traffic into revenue. 4+ years across every major experimentation platform — Optimizely, AB Tasty, Kameleoon, VWO, Adobe Target, Qubit. Modern stack — Next.js, TypeScript, and a Claude-Code-led workflow that actually finishes what it starts.

Open to new roles — full-time or contract
Get in touch
0+
A/B tests & experiments shipped
0
Years building for the web
0+
Countries worked with
02 / Disciplines

What I do.

[01]

A/B Testing &
Experimentation

Building and shipping conversion experiments — from single-element tests to full checkout-flow redesigns.

OptimizelyAB TastyKameleoonCRO
[02]

Frontend
Development

Production frontend with Next.js, React, TypeScript, and modern CSS/SCSS. Mobile-first, performance-conscious builds.

Next.jsReactTypeScriptSCSS
[03]

Product
Building

Designing and building complete products solo — architecture, frontend, and the systems around them.

ArchitecturePostgreSQLDrizzle
05 / Clients

Selected clients.

Through agency work, a few brands I've shipped tests for — across publishing, retail, automotive, gaming, and non-profit.

News & publishing

The Times

Fashion

G-Star RAW

Automotive

Motorway

Gaming & SaaS

Unity

Ecommerce

IronmongeryDirect

Non-profit

WaterAid

Browser tech

AdBlock

HR & SaaS

Deel

— and many, many more.

06 / Recognition

Recognition.

The previous version of this portfolio was featured as Site of the Day on design galleries.

Let's
build something
measurable.

Open to new roles — full-time, contract, or freelance. If you're hiring or have a project in mind, send me a note.

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