Chew Wei Loon
Senior Frontend Engineer with 8+ years building scalable production platforms in React and Next.js.
I build scalable production platforms, and I care a lot about SSR/SSG architecture, Core Web Vitals, and technical SEO.
Improved Lighthouse scores from 55 to 90+ and contributed to 40%+ organic traffic growth through frontend optimization.
8+ years building production frontend applications · React / Next.js specialist · Based in Singapore
Chew Wei Loon
Senior Frontend Engineer
Building performant, scalable frontend systems for real products
I'm a Senior Front-End Developer with 8+ years of experience building production web applications, ranging from e-commerce platforms to 3D visualization tools, admin systems, and mobile products.
My core focus is building scalable React and Next.js applications, with performance, SEO, SSR/SSG architecture, and maintainabilityas the priorities. I've taken Lighthouse scores from ~55 to 90+ and helped drive 40%+ organic traffic growth through frontend optimization and technical SEO.
Beyond writing code, I mentor frontend developers, review architecture decisions, and work closely with product, design, and backend teams so we can ship reliable production systems together.
Performance & SEO
I optimize Core Web Vitals, Lighthouse scores, metadata, structured data, and sitemap strategy, all to improve search visibility and the actual user experience.
Frontend Architecture
I build modular React and Next.js applications, with state management, reusable components, and code structure designed to scale.
Analytics & Tracking
I integrate GA4, GTM, Firebase, and AppsFlyer so teams can track user behavior, analyze funnels, and make product decisions backed by real data.
Production Delivery
I've delivered frontend systems across e-commerce platforms, admin dashboards, 3D web applications, and mobile experiences, and kept them reliable in production.
Professional Experience
A track record of shipping products that made a difference, based in Singapore but not limited to it
Frontend Developer → Lead Frontend Developer
Wizlah Pte Ltd
Singapore- Led frontend development across e-commerce platforms, 3D visualization tools, and internal admin systems.
- Migrated legacy React applications to Next.js with SSR/SSG architecture, improving SEO visibility, page performance, and scalability.
- Improved Lighthouse performance scores from ~55 to 90+ through rendering strategy improvements and frontend optimization.
- Implemented technical SEO strategies including metadata management, structured data, and sitemap optimization, contributing to 40%+ organic traffic growth.
- Designed scalable state management architecture using Redux Toolkit, including slices, async thunks, and reusable data flow patterns.
- Integrated analytics and tracking tools including GA4, GTM, Firebase, and AppsFlyer to support user behavior tracking and funnel analysis.
- Mentored 3 junior developers, established frontend coding standards, and improved overall team delivery quality.
Web Front-End Developer
Sensetime International Pte Ltd
Singapore- Built backend management systems using Vue.js and Razor UI to streamline administrative operations.
- Developed an E-Visa WeChat Mini Program using WeChat Mini Program boilerplate and Vant UI framework.
- Created an E-Visa backend management system with React and Ant Design for efficient data management and internal workflows.
- Collaborated with backend teams on API integration, data flow, and frontend implementation.
Frontend Developer → Frontend Developer II
798 Visual Technology
Singapore- Developed responsive websites using HTML5, CSS3, and JavaScript based on PSD designs and client requirements.
- Built an exchange trading platform using React, collaborating with backend developers for API integration and testers for quality assurance.
- Adapted to changing user requirements and UI designs while ensuring timely delivery of projects.
- Implemented responsive UI components and maintained frontend consistency across multiple client-facing projects.
Projects I've Led & Shipped
Production applications with measurable impact, each one showing ownership, architecture decisions, and technical leadership
Web ApplicationWiz Marketplace
A production B2C e-commerce marketplace for home and lifestyle products. It covers product discovery and checkout, with analytics tracking and multi-language support built in for expansion into regional markets.
Web ApplicationMC Home Website
A SEO-focused property rental website built for MC Home Management, showcasing rooms at 22 Macalisterz. The room detail pages and booking flows were built specifically to improve search visibility and turn visitors into enquiries.
Internal DashboardMC Home Admin Portal
An internal admin dashboard for MC Home Management. It is where the team manages properties, rooms, homeowners, enquiries, and images, all the operational data behind the public MC Home website.
Interactive Web ApplicationWizlah Web
An interactive 3D web application that lets homeowners and interior designers design and visualize their living spaces directly in the browser, exploring floor plans, placing furniture, and interacting with objects in real time.
Web ApplicationWiz Marketplace Business Platform
A B2B procurement platform for businesses sourcing construction materials, tools, and daily-use supplies. It supports multiple user tiers, so Pro users get access to more product listings than standard business users.
Mobile ApplicationWizlah App
A cross-platform mobile application where users can explore floor plans, interact with 3D showrooms, browse marketplace products, and check out, all in one app. It covers the whole journey from discovery to checkout, plus extra content like blog articles.
Core Expertise
Technologies and practices I use to build scalable, high-performance applications.
Core Expertise
Primary technologies I lead, architect, and ship with daily
Architecture & Performance
Systems design, rendering strategy, and optimization
Analytics & Growth
Tracking, attribution, and data-driven product decisions
Tools & Supporting Stack
Dev tooling, UI libraries, backend services, and supporting platform experience
Achievements & Highlights
8+
Years Experience
Frontend engineering
20+
Projects Shipped
Web, mobile, and internal systems
90+
Lighthouse Score
Performance optimization
40%+
Organic Traffic Growth
SEO and indexability improvement
SEO-Focused Property Platform
2026Built a Next.js property rental website using SSR/SSG and structured data, and it shows: Lighthouse 99/95/88/100, Search Console clicks up 64%, impressions up 37%, and property page clicks up 213%.
Platform Performance Milestone
2023Took Lighthouse performance scores from ~55 to 90+ by reworking the rendering strategy and optimizing the frontend.
Organic Growth Through Technical SEO
2022Helped drive 40%+ organic traffic growth, mainly by improving the SSR/SSG architecture, metadata, structured data, and how well pages got indexed.
Lead Frontend Developer Promotion
2021Promoted to Lead Frontend Developer after consistently shipping production systems and helping raise the team's delivery quality.
How I Build Scalable Products
Principles that guide every architectural decision, from initial design through to production monitoring.
90+
Lighthouse Score
40%+
Organic Traffic Growth
8+
Years Experience
Performance-First Mindset
I treat performance as part of product quality, not something you clean up at the end. That means paying attention to rendering strategy, image delivery, bundle size, and Core Web Vitals throughout, so users actually get a faster experience.
SEO-Driven Architecture
I design frontend architecture with discoverability in mind. SSR/SSG, metadata, structured data, semantic HTML, sitemap configuration, and clean URL structures all play a part in how well a page gets indexed.
Scalable State Management
I keep clear boundaries between UI state, server data, and domain logic, and lean on Redux Toolkit patterns so the application's data flow stays predictable as it grows.
Component-Driven UI Systems
I build reusable UI patterns on top of component libraries like Ant Design and Material UI, keeping layout structure, prop usage, and styling conventions consistent so component boundaries stay maintainable.
Analytics-Aware Development
I integrate analytics into product flows so teams can see how users actually behave, track the interactions that matter, and measure whether frontend changes are making a difference.
Get In Touch
Open to frontend engineering opportunities, technical collaborations, and product-focused projects.
Open to Opportunities
I'm currently open to frontend engineering opportunities focused on React, Next.js, performance optimization, SEO, and scalable product development. I'm based in Singapore and open to both on-site and remote work.
Send a Message
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