Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Sean Rosario—a frontend-focused developer with a passion for building dynamic, user-friendly websites and automating processes to meet client needs. I specialize in Shopify, Zapier, Zoho, Tailwind, WordPress, and TypeScript, delivering clean interfaces and robust integrations for e-commerce and business apps. I’m skilled in theme customization, responsive design, and collaborating with back-end developers and designers to improve usability and performance. I’m dedicated to delivering top-notch solutions on time and building maintainable code for headless setups, custom storefronts, and efficient workflows.…Hi, I’m Sean Rosario—a frontend-focused developer with a passion for building dynamic, user-friendly websites and automating processes to meet client needs. I specialize in Shopify, Zapier, Zoho, Tailwind, WordPress, and TypeScript, delivering clean interfaces and robust integrations for e-commerce and business apps. I’m skilled in theme customization, responsive design, and collaborating with back-end developers and designers to improve usability and performance. I’m dedicated to delivering top-notch solutions on time and building maintainable code for headless setups, custom storefronts, and efficient workflows.

Sean Rosario

Front-End Developer, Full Stack Developer, Web Developer, +5





Hi, I’m Sean Rosario—a frontend-focused developer with a passion for building dynamic, user-friendly websites and automating processes to meet client needs. I specialize in Shopify, Zapier, Zoho, Tailwind, WordPress, and TypeScript, delivering clean interfaces and robust integrations for e-commerce and business apps. I’m skilled in theme customization, responsive design, and collaborating with back-end developers and designers to improve usability and performance. I’m dedicated to delivering top-notch solutions on time and building maintainable code for headless setups, custom storefronts, and efficient workflows.…Hi, I’m Sean Rosario—a frontend-focused developer with a passion for building dynamic, user-friendly websites and automating processes to meet client needs. I specialize in Shopify, Zapier, Zoho, Tailwind, WordPress, and TypeScript, delivering clean interfaces and robust integrations for e-commerce and business apps. I’m skilled in theme customization, responsive design, and collaborating with back-end developers and designers to improve usability and performance. I’m dedicated to delivering top-notch solutions on time and building maintainable code for headless setups, custom storefronts, and efficient workflows.

Available to hire

Hi, I’m Sean Rosario—a frontend-focused developer with a passion for building dynamic, user-friendly websites and automating processes to meet client needs. I specialize in Shopify, Zapier, Zoho, Tailwind, WordPress, and TypeScript, delivering clean interfaces and robust integrations for e-commerce and business apps.

I’m skilled in theme customization, responsive design, and collaborating with back-end developers and designers to improve usability and performance. I’m dedicated to delivering top-notch solutions on time and building maintainable code for headless setups, custom storefronts, and efficient workflows.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Front-End Developer at Transform PDF

January 1, 2021 - October 18, 2025

Transform PDF designs into front-end code with HTML, CSS, and JavaScript. WordPress; Build, maintain and improve websites.

Front-End Developer (Freelance) at Nicolas Lavrov Studio

January 1, 2025 - October 18, 2025

Developing a headless website using Shopify and WordPress with TypeScript. Collaborate with back-end developers and web designers to improve usability. Convert PDF designs into responsive front-end code using HTML, CSS, and JavaScript.

Front-End Developer at Vapelabs / Quitmed

January 1, 2023 - October 18, 2025

Solving back end and front end errors; Building reusable codes from scratch; Setting up automation using Zoho and Zapier; Maintain and improve websites.

Full Stack Developer (Full-Time) at Sean O'Neill Portfolio

January 1, 2023 - Present

Front-End Developer (Full-Time) at Transform PDF Designs

December 31, 2021 - October 18, 2025

Transform PDF designs into front-end code with HTML, CSS, and JavaScript. WordPress. Build, maintain and improve website.

Front-End Developer (Freelance) at Freelance

January 1, 2025 - October 18, 2025

Developing headless websites using Shopify and WordPress with TypeScript. Collaborate with back-end developers and web designers to improve usability.

Front-End Developer at Nicolas Lavrov Studio

January 1, 2025 - October 18, 2025

Full Stack Developer (Full-Time) at Sean O'Neill Portfolio

January 1, 2023 - Present

Vap Labs / Quitmed solving backend and frontend errors; Building reusable codes from scratch; Setting up automation using Zoho and Zapier; Maintain and improve websites.

Front-End Developer (Full-Time)

January 1, 2018 - January 1, 2021

Transform PDF designs into front-end code with HTML, CSS, and JavaScript. WordPress—build, maintain, and improve websites.

Front-End Developer (Freelance) at Nicolas Lavrov Studio

January 1, 2021 - January 1, 2025

Developing headless websites using Shopify and WordPress with TypeScript. Collaborate with back-end developers and web designers to improve usability.

Front-End Developer (Full-Time) at Vapelabs / Quitmed

January 1, 2022 - January 1, 2023

Building reusable codes from scratch; setting up automation using Zoho and Zapier; addressing front-end and back-end integration challenges.

Front-End Developer (Full-Time)

January 1, 2023 - Present

Current work focused on a portfolio project and ongoing front-end development tasks. Portfolio: seanoneilportfolio.vercel.app