# Welcome

Hi there — I’m really glad you're here!

This GitBook is my personal space for learning, teaching, and sharing everything I pick up throughout my journey as a developer. If you’re curious about Shopify theme development, CRO, JavaScript, or practical web engineering, you’ll feel right at home.

## 📚 About This Site

This GitBook is a growing knowledge library — a collection of guides, explanations, breakdowns, and notes I write as I learn.\
It covers:

* Shopify theme development (Liquid, Shopify CLI, App Bridge, checkout, emails)
* CRO & A/B testing (Optimizely, VWO, Adobe Target, AB Tasty, Convert)
* Frontend engineering and JavaScript fundamentals
* Node.js concepts and backend basics
* Browser tools, debugging techniques, and real-world workflows
* Practical solutions from client projects and everyday engineering challenges

My goal is simple:\
\
**To make complex topics easy, fun, and accessible — and to share everything I know with anyone who finds it useful. No copyright. Feel free to copy and share.**

## 🙋‍♂️ About Me — Saabbir Hossain

<figure><img src="https://1903616780-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LmqxFZ75LHS8cHcfa28%2Fuploads%2FHQensZu7JGdfu6lI9uuV%2Fprofile-pic.jpeg?alt=media&#x26;token=6c913d84-5229-4bcc-8b34-d3e38d0585a5" alt="" width="150"><figcaption></figcaption></figure>

I’m Saabbir, a veteran front-end developer and Shopify expert with over 8 years of experience building high-quality ecommerce experiences. I’ve spent more than 2 years specializing deeply in Shopify themes, Liquid, and the full Shopify ecosystem.

I focus on:

* Custom Shopify themes
* Conversion Rate Optimization (CRO)
* A/B testing (Optimizely, VWO, Adobe Target, AB Tasty, Convert)
* Modern frontend development
* JavaScript fundamentals and internals
* Analytics & tracking (GA, GTM)
* Shopify → 3PL integrations and practical engineering workflows

I hold an **Optimizely Experimentation Web Platform Expert** certification.

I love learning, taking notes, and teaching through storytelling. This GitBook is where I share it all so you — and future me — can benefit.

## 📞 Contact & Social Links

If you’d like to reach me, collaborate, or explore more of my work, here are the best ways to connect:

#### **Contact**

* **Email:** <thesaabbir@gmail.com>
* **Phone:** +8801789243439

#### **Social profiles**

* **LinkedIn:** [https://www.linkedin.com/in/thesaabbir](https://www.linkedin.com/in/thesaabbir/)
* **GitHub:** <https://github.com/saabbir>

#### **Explore more**

* **Portfolio:** <https://saabbir.github.io>
* **Resume:** <https://saabbir-resume.netlify.app>
* **Blog (Hashnode):** <https://saabbir.hashnode.dev>
* **Dev.to:** <https://dev.to/saabbir>

#### **Projects**

* **My Shopify Store:** <https://thesaabbir.myshopify.com>
* **Shopify Tab Extension:** <https://github.com/Saabbir/shopify-tab-extension>