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I'm Muhammad Jessen Reinhart Sugiarto, a frontend software engineer with over 7 years of experience building scalable web applications, including CMS and e-commerce frontends. I specialize in ReactJS, NextJS, TypeScript, and TailwindCSS, delivering fast, accessible, and maintainable interfaces. I've contributed to multi-site and white-label frontend solutions for financial platforms across Southeast Asia, built CMSs to empower non-technical teams, and collaborated in cross-functional teams to improve modularity, scalability, and reliability. I enjoy learning new tools and improving workflows, and I have a proven track record of enhancing performance and supporting platforms that handle millions of monthly transactions and users.…I'm Muhammad Jessen Reinhart Sugiarto, a frontend software engineer with over 7 years of experience building scalable web applications, including CMS and e-commerce frontends. I specialize in ReactJS, NextJS, TypeScript, and TailwindCSS, delivering fast, accessible, and maintainable interfaces. I've contributed to multi-site and white-label frontend solutions for financial platforms across Southeast Asia, built CMSs to empower non-technical teams, and collaborated in cross-functional teams to improve modularity, scalability, and reliability. I enjoy learning new tools and improving workflows, and I have a proven track record of enhancing performance and supporting platforms that handle millions of monthly transactions and users.

Muhammad Jessen Reinhart Sugiarto

Front-End Developer, Web Developer, Full Stack Developer

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I'm Muhammad Jessen Reinhart Sugiarto, a frontend software engineer with over 7 years of experience building scalable web applications, including CMS and e-commerce frontends. I specialize in ReactJS, NextJS, TypeScript, and TailwindCSS, delivering fast, accessible, and maintainable interfaces. I've contributed to multi-site and white-label frontend solutions for financial platforms across Southeast Asia, built CMSs to empower non-technical teams, and collaborated in cross-functional teams to improve modularity, scalability, and reliability. I enjoy learning new tools and improving workflows, and I have a proven track record of enhancing performance and supporting platforms that handle millions of monthly transactions and users.…I'm Muhammad Jessen Reinhart Sugiarto, a frontend software engineer with over 7 years of experience building scalable web applications, including CMS and e-commerce frontends. I specialize in ReactJS, NextJS, TypeScript, and TailwindCSS, delivering fast, accessible, and maintainable interfaces. I've contributed to multi-site and white-label frontend solutions for financial platforms across Southeast Asia, built CMSs to empower non-technical teams, and collaborated in cross-functional teams to improve modularity, scalability, and reliability. I enjoy learning new tools and improving workflows, and I have a proven track record of enhancing performance and supporting platforms that handle millions of monthly transactions and users.

Available to hire

I’m Muhammad Jessen Reinhart Sugiarto, a frontend software engineer with over 7 years of experience building scalable web applications, including CMS and e-commerce frontends. I specialize in ReactJS, NextJS, TypeScript, and TailwindCSS, delivering fast, accessible, and maintainable interfaces.

I’ve contributed to multi-site and white-label frontend solutions for financial platforms across Southeast Asia, built CMSs to empower non-technical teams, and collaborated in cross-functional teams to improve modularity, scalability, and reliability. I enjoy learning new tools and improving workflows, and I have a proven track record of enhancing performance and supporting platforms that handle millions of monthly transactions and users.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Indonesian

Fluent

English

Advanced

Work Experience

Software Engineer at LG Sinarmas - via PGI Data

November 24, 2025 - Present

Developing a Card Management System, an enterprise web application handling credit and debit card lifecycle operations. Building backend features using MDA-based Java Application, Spring Boot, and integrating them with Thymeleaf templates for the frontend layer. Working across the full stack on card issuance, activation, and reporting workflows.

Frontend Software Engineer at Inspigo

September 1, 2023 - October 26, 2025

Built a NextJS CMS that streamlined content management workflows, enabling non-technical teams to update app content independently and faster. Collaborated on a conceptual real-time audio conferencing feature, exploring web-audio technologies to support live voice interactions.

Frontend Software Engineer at Wide Technologies Indonesia

September 1, 2023 - November 21, 2025

Contributed to PrimeCash X, a digital banking platform serving 20+ corporate and retail banks across Southeast Asia. Developed multi-site and white-label frontend solutions in ReactJS, enabling banks to customize branding and features for their clients. Implemented internationalization (i18n) to support multi-language interfaces, ensuring accessibility for diverse regional users. Collaborated within a cross-functional R&D team to enhance modularity, scalability, and reliability of banking-grade web applications.

Frontend Software Engineer at SIRCLO

November 1, 2022 - October 26, 2025

Developed a custom ReactJS CMS that empowered clients to update their webstores more efficiently, serving over 100,000+ brands. Engineered SSR storefronts with NextJS + TailwindCSS, improving load speed by ~40% and boosting Lighthouse score from ~70 → ~95. Developed secure ReactJS payment pages supporting ~2M monthly orders within SIRCLO’s ecosystem serving 30M+ end-consumers.

UI Developer at Aksaramaya

November 1, 2019 - October 26, 2025

Delivered ReactJS dashboards and ChartJS visualizations for digital library platforms used across 60+ library apps developed by Aksaramaya.