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Jerome Panagsagan

@jeromepanagsagan

Frontend Developer who built a campaign-tracking SDK and reporting dashboards at Feiwin Corp.

At Feiwin Corp., I built campaign and promotional landing pages and developed a JavaScript tracking SDK that captured invite codes, clicks, and page visits for reporting dashboards. I also implemented Google Tag Manager and Google Analytics 4 instrumentation to measure visitor behavior.

At SNSOFT Technology Inc., I built responsive React.js and TypeScript applications, reusable component libraries, and internationalized interfaces. I improved page load speed and Core Web Vitals, and supported code quality with unit tests and mentoring through code review.

Experience

Work history, roles, and key accomplishments

Frontend Developer

SNSOFT Technology Inc.

Dec 2024 - Jul 2026 (1 year 7 months)

Designed, built, and maintained responsive front-end applications with React.js, TypeScript, HTML5, and CSS3. Built reusable component libraries, implemented i18n, and ensured code quality through unit tests and performance optimization.

React TypeScript HTML5 CSS Figma Jest Vitest React Testing Library Code Splitting Lazy Loading Memoization Asset Optimization i18n Code Review Mentorship

Freelance Frontend Developer

Self-Employed

Sep 2021 - Dec 2024 (3 years 3 months)

Built responsive websites and reusable UI components from scratch for local and overseas clients using React.js, Next.js, and TypeScript. Worked directly with clients in English, translating requirements into finished pages and delivering on schedule.

React Next.js TypeScript Responsive Design Client Communication Project Delivery

Junior Frontend Developer

Feiwin Corp.

Nov 2022 - Nov 2024 (2 years)

Built campaign and promotional landing pages in plain HTML, CSS, and JavaScript, and CMS-integrated content pages. Developed a custom JavaScript tracking SDK and implemented analytics with Google Tag Manager and Google Analytics 4.