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Frontend Developer with 4 years of experience building responsive web applications. I specialize in user experience design, CMS enhancements, and ensuring cross-browser compatibility, with strong skills in React, Redux, and TypeScript. I enjoy collaborating with cross-functional teams, leading frontend work streams, and turning ideas into polished interfaces. Outside work, I contribute to open projects and mentor peers to improve code quality and delivery speed.…Frontend Developer with 4 years of experience building responsive web applications. I specialize in user experience design, CMS enhancements, and ensuring cross-browser compatibility, with strong skills in React, Redux, and TypeScript. I enjoy collaborating with cross-functional teams, leading frontend work streams, and turning ideas into polished interfaces. Outside work, I contribute to open projects and mentor peers to improve code quality and delivery speed.

Alfonso Sirait

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Frontend Developer with 4 years of experience building responsive web applications. I specialize in user experience design, CMS enhancements, and ensuring cross-browser compatibility, with strong skills in React, Redux, and TypeScript. I enjoy collaborating with cross-functional teams, leading frontend work streams, and turning ideas into polished interfaces. Outside work, I contribute to open projects and mentor peers to improve code quality and delivery speed.…Frontend Developer with 4 years of experience building responsive web applications. I specialize in user experience design, CMS enhancements, and ensuring cross-browser compatibility, with strong skills in React, Redux, and TypeScript. I enjoy collaborating with cross-functional teams, leading frontend work streams, and turning ideas into polished interfaces. Outside work, I contribute to open projects and mentor peers to improve code quality and delivery speed.

Available to hire

Frontend Developer with 4 years of experience building responsive web applications. I specialize in user experience design, CMS enhancements, and ensuring cross-browser compatibility, with strong skills in React, Redux, and TypeScript.

I enjoy collaborating with cross-functional teams, leading frontend work streams, and turning ideas into polished interfaces. Outside work, I contribute to open projects and mentor peers to improve code quality and delivery speed.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Indonesian

Fluent

English

Advanced

Work Experience

Frontend Low Code Developer at Cargo Community Network

October 20, 2022 - November 4, 2025

Collaborated with cross-functional teams to implement user-centered design principles. Managed and optimized a partner-integrated website using Bubble.io, increasing user satisfaction and operational efficiency by 20%.

Frontend Developer at CROWDE

October 1, 2022 - October 1, 2022

Developed and maintained responsive web applications using React and Redux with an intuitive menus system for funding apps. Led a team of frontend developers in building Super Lender apps, Toni CMS, and marketing sites, ensuring timely delivery with 90% code quality. Refactored legacy code by converting class components to functional components, improving maintainability and reducing technical debt.

Event Organizer at Republic Of Christians Exhibition Committee

October 20, 2019 - October 20, 2019

Led coordination for a 50+ participant exhibition.

Head of Multimedia at Republic Of Christians Exhibition Committee

October 20, 2019 - October 20, 2019

Coordinated multimedia setup and photography teams; managed exhibition visuals.