zeyen@portfolio: ~/home
Open to the right opportunity
$ whoami
Chai Ze Yen
$ cat role.txt
Frontend Web Developer
$ cat tagline.txt
Building fast, accessible web interfaces for banking, fintech, and digital entertainment products.
// React · Next.js · TypeScript — 5 yrs across automotive, banking, consulting & entertainment
$ cat about.md
Who am I
I'm a frontend developer with 5+ years building web applications across the automotive, banking, consulting, and digital entertainment industries. I'm currently at Primitive Technology, owning frontend delivery for a customer-facing entertainment platform in 21 languages, after shipping enterprise banking products at Deloitte for Maybank.
I turn design mockups into responsive, accessible, high-performing interfaces with React, Next.js, TypeScript, and Tailwind, and I'm comfortable owning the full frontend lifecycle: from proof-of-concept to production, reusable component libraries, and REST API integration.
Beyond the UI, I set up the workflow around it — GA4/GTM analytics funnels, pre-render (SSG/ISR) for performance and SEO, git hooks that keep quality high, and AI-assisted workflows in Claude Code that take a ticket to a browser-verified pull request.
I care about code quality, clear collaboration, and continuous improvement. If you're looking for a frontend developer who ships reliable UI and communicates well, let's talk.
→ check out some of my latest projectsprofile.jpg
$ ls skills/
What can I do
HTML.html
CSS.css
JavaScript.js
TypeScript.ts
React.jsx
Next.js.tsx
Gitvcs
Vitebuild
Tailwind.css
TanStack Querydata
Vitesttest
Figmadesign
Claude Codeai
shadcn/uiui
Ant Designui
NodeJs.js
Shopifycms
Firebasedb
MongoDBdb
Analytics (GA4)data
Tag Managerdata
$ git log --experience
What I've done
commit a4f1c9e
Frontend Developer
Primitive Technology Sdn. Bhd.
December 2025 - Present
# Consumer Platform
+ Own frontend delivery across 4 applications — 2 consumer platforms, a partner portal, and a CMS — as 1 of 5 developers under a team lead
+ Merged 267 pull requests in six months, about a third of the team's frontend output
+ Built on React 19, TypeScript, Tailwind v4, TanStack Query and Zustand in a multi-brand Turborepo monorepo
+ Partnered with the product designer on a shared design system, enforced in code as one token set for colour, buttons, and alerts
# Content Discovery & Player
+ Built the catalogue home, in-place search, and category, provider and theme pages on live APIs
+ Built a live activity feed over server-sent events, highlighting each new entry as it arrives
+ Built mini player and picture-in-picture playback, keeping sessions alive while users browse the catalogue
+ Let guests try content in demo mode, and let a second browser tab reuse a live session
# Authentication & Account Security
+ Rebuilt every sign-in dialog on one shared shell: a split layout on desktop, a bottom sheet on mobile
+ Supported email or username, social, Telegram and wallet sign-in, with inline errors mapped from backend codes
+ Built email verification with a resend countdown, gating payments until it is done
+ Added two-factor authentication setup and reset, phone verification, and 2FA before a new payout address is saved
# Identity Verification (KYC)
+ Platform A — in-house flow: built the KYC module end to end as a resumable 8-screen flow — profile-level status checks, conditional mobile registration with OTP, bank detail submission, admin review, and a final amount challenge
+ Held users in a pending state that survives reload and returns them to the correct stage on re-entry
+ Platform B — Sumsub: integrated Sumsub's identity verification SDK, loaded only when opened, with tokens issued and refreshed by the backend and the result trusted only from Sumsub's server-side webhook
+ Reused Sumsub's face check as the identity step for resetting 2FA, and ran the flow full-screen on phones in the user's own language
# Account Hub & Rewards
+ Built the account hub — overview, wallet, transactions and settings — with filtered history, paging and Excel export
+ Built the loyalty, rewards and referral pages, with claiming wired to the backend
+ Built public profiles that follow each user's privacy settings
# Localisation — 21 Languages
+ Took the platform from 4 to 21 languages, including right-to-left Arabic
+ Added fonts for Arabic, Thai, Hindi and Cyrillic that download only when needed, and loaded each language as its own bundle
+ Moved translations to a Google Sheet the product team edits, with a sync that refuses broken placeholders
+ Found 283 strings that never reached translators, and fixed translated text overflowing its layout
# Web Performance & Analytics
+ Introduced the first analytics coverage on a platform that had none, implementing GA4 through GTM
+ Defined the event schema for the full conversion funnel, from homepage view to signup and first purchase
+ Added Consent Mode v2 by region, and kept sign-in and reset tokens out of every URL sent to Google
+ Generated the GTM container from the app's own event list, and wrote a handover guide for the next owner
# AI-Assisted Delivery Workflows
+ Ran ticket and QA-defect work through Claude Code workflows: claimed from a shared sheet, built in its own git worktree, opened as a pull request, and checked in a real browser with screenshots
+ Automated design checks that compare code against Figma for spacing, colour and radius
+ Automated text-overflow audits at 8 screen widths, proving each fix by re-running the audit
+ Ran an API contract test across every endpoint, reporting what changed since the last run
+ Kept a person between finding and fixing — tools file tickets, people review them, nothing merges itself
# Engineering Workflow
+ Shipped git hooks that give all 5 developers the same formatting, lint and type checks with no setup
+ Extended them to generate currency icons and flag new text for translation
+ Ran a security pass that stopped mock data reaching production and closed client-side data leaks
# Partner Portal
+ Delivered the partner dashboard for referral tracking and performance reporting
+ Designed the data table, filtering, and export layer handling commission and campaign statistics
# Content Management System
+ Operate the CMS behind live campaigns, publishing promotional content to the consumer platform
+ Extended user records with KYC status filtering to support day-to-day operational checks
commit a4f21c9
Senior Technology Analyst
Deloitte Consulting Sea Sdn. Bhd.
April 2024 - November 2025
# Maybank M2E Convergence
+ Develop enterprise banking web application using React, Tailwind, Zustand
+ Create responsive and user-friendly interfaces for banking products such as Deposits and Loans
+ Integrate RESTful APIs to fetch and display real-time banking data
+ Ensure cross-browser compatibility and resolve browser-specific issues
+ Write code with best practices and create reusable components
+ Work closely with QA teams to identify, debug, and resolve application issues
+ Create multi-step forms for customers to accept terms and conditions
# Maybank M2E E-Onboarding
+ Fix 7 tickets in 2 days without prior knowledge of the codebase
commit 7b3e08d
Frontend Developer
Edag Holding Sdn. Bhd.
November 2022 - March 2024
# Resource Information & Fulfillment Tools (RIFT)
+ Involved in the frontend development lifecycle of a resource planning app
+ Conceptualized and initiated the development of a resource planning app for project managers
+ Designed and developed a proof of concept (POC) to validate feasibility and functionality
+ Collaborated with project stakeholders to gather and refine functional requirements
+ Shared frontend knowledge with colleagues from Malaysia and Germany, including code quality
# Work Place Reservation System (WPRS)
+ Utilized Angular components, services, modules, and routing for a maintainable codebase
+ Resolved 82 merge conflicts across 7 branches using Git knowledge
+ Merged 7 story branches with pull requests, improving team collaboration
+ Wrote Jest unit tests with 80% code coverage to catch bugs early
+ Collaborated with the backend team to integrate REST APIs for faster data processing
commit c9d1a45
Frontend Developer
OmniGeo Solutions Sdn. Bhd.
September 2021 - October 2022
# In House Admin System
+ Developed admin system using Next.js and Bootstrap
+ Implemented responsive designs that optimized UX across various devices
+ Created custom functions for uploading, processing, and error handling of CSV files
+ Implemented user authentication using OAuth with NextAuth
+ Submitted data to the server with RESTful APIs to ensure data integrity
commit e2f77b0
Shopify Frontend Developer (Internship)
Jumpstart Commerce Sdn. Bhd.
December 2020 - March 2021
# Multiple Shopify Stores
+ Developed custom Shopify themes using HTML, CSS, and JavaScript
+ Launched 3 new Shopify stores and updated 6 existing ones
+ Collaborated with cross-functional teams to deliver e-commerce solutions
+ Provided technical support and troubleshooting for Shopify stores
commit 1a90fce
Frontend Developer (Part-time)
Leo Code Sdn. Bhd.
May 2020 - July 2021
# Entertainment Website
+ Create webpages with Angular and Bootstrap
+ Check for bugs in the development and production environment
+ Translate website content to other languages with i18n
+ Provide ideas for creating UI for the application
$ ls projects/
