Saabbir Hossain

Saabbir Hossain


Senior Frontend Engineer | A/B Testing Specialist Dhaka, Bangladesh

About Me

A veteran frontend engineer and A/B testing expert, I bring 8 years of experience building high-quality, performant websites and apps using modern tools like React and Shopify.

In the past 3 years, I’ve specialized in CRO and A/B testing, helping e-commerce sites overcome user friction and drive revenue growth through targeted optimization.

Work Experience

  1. Senior Software Engineer


    EchoLogyx Uttara, Dhaka

    Executed A/B Tests for Enhanced User Experience

    ✅ Leveraged front-end technologies like Vanilla JS, jQuery, HTML, and CSS to build and implement A/B tests.

    ✅ Utilized industry-leading testing platforms (Adobe Target, Optimizely, AB Tasty, Google Optimize) to deliver high-quality, targeted experiments.

    ✅ Maintained meticulous attention to detail, ensuring pixel-perfect execution and bug-free A/B tests to client specifications.

  2. Senior Frontend Developer

    Inspectiv (formerly known CESPPA) Los Angeles, CA

    Designed and Developed Responsive UI for CESPPA Platform

    ✅ Built reusable UI components for both the CESPPA website and back-end application platform using HTML and SCSS.

    ✅ Leveraged Vue.js to transform UI blocks into interactive and maintainable components, enhancing front-end development efficiency.

    ✅ Contributed to brand consistency by developing a custom WordPress theme for CESPPA’s website.

    ✅ Created engaging HTML email templates for various marketing and communication purposes.

  3. Freelance Frontend Developer

    UpWork Online

    I worked as an independent contractor, providing freelancing services to third-party client companies through Upwork. Upwork provides an online workplace where businesses can hire, manage, and pay freelancers via its web-based platform. See what clients say about me 👉


  1. Bachelor, Computer Science

    Institute of Science, Trade and Technology Dhaka, Bangladesh

    I dropped out after the first semester to pursue a career in web development.

  2. Higher Secondary Certificate (HSC)

    Shere Bangla Degree College Barisal, Bangladesh

    Department: Science
    Grade: 4.90

  3. Secondary School Certificate (SSC)

    Joysree Mundapasha S.A.B.M High School Barisal, Bangladesh

    Department: Science
    Grade: 5.00



HTML CSS JavaScript Sass/Less/PostCSS Nunjucks jQuery Bootstrap Vue.js Nuxt.js React.js Redux.js Gulp Webpack Shopify WordPress A/B Testing CRO


Node.js Express.js REST API GraphQL API Firebase MongoDB


  • Bengali (native)
  • English (conversational)


Optimizely Certified Experimentation Web Platform Expert

  • Issuing organization: Optimizely
  • Issue date: 2023/11
  • Expiration date: 2025/11
  • Skills required: CRO Management, A/B Testing, CSS, JavaScript