Previously built data platforms at Tencent scale

Hi, I'm Kelvin You
Frontend Engineer · Systems Thinker

0+Years Exp.
0+Projects

About Me

Learn more about my journey and what drives me as a developer

Start with a messy, ambiguous problem

Design it into a system, not a patch

Ship it so it runs on its own

How I Work

I chase the pattern under a mess — an ambiguous problem, a slow system, a manual workflow — and turn it into something that runs on its own.

Currently Building

Full-stack SaaS with Next.js + Supabase. Exploring AI-assisted development, cloud architecture, and data-driven product thinking.

ReactTypeScriptNext.jsGraphQLNode.jsPostgreSQL

Projects

A collection of projects I've built and contributed to.

Project Preview
In Progress

Agentic Dev Tools — Claude API + MCP

Side project exploring multi-agent systems applied to developer workflows. LLM-powered Playwright spec generator with auto-debug loop, multi-agent PRD/Figma reconciliation that flags spec conflicts pre-development, and reusable Claude rules + agent harness conventions. Stack: Claude API + custom MCP tools + Playwright + structured tool calls.

Claude APIMCPPlaywright+3
Project Preview
In Progress

Personal-OS — Multi-Agent Personal Operating System

Production agentic system (12 Claude Code skills + MCP servers) for self-management, health, and finance. Guardrail design over raw model output: only a single acute bad-sleep night is a hard, non-overridable rule; for the noisier 7-day rolling sleep-debt trend, real-time HRV is allowed to override an automated deload call — so the agent catches genuine acute risk without crying wolf every week on a lagging metric. Weekly-review, wealth-manager, learning-agent, profile-optimizer, and coach-planner skills run on a weekly cadence, replacing manual self-planning with structured, data-driven review.

Claude CodeMCPLLM Integration+4
PTIB - Tuition Center Management SaaS
In Progress

PTIB - Tuition Center Management SaaS

Multi-tenant SaaS digitizing a 200-student tuition center. Role-based portals, Stripe billing, QR attendance, row-level security in Supabase. Saved 5 hrs/week, $500 MRR from 3 pilot centers.

Next.jsTailwindCSSSupabase+4
Demo
See All Projects

Experience

Building products at scale. From Tencent's millions to startup MVPs.

DTCPay (FinTech)

Frontend Engineer

DTCPay (FinTech)·Kuala Lumpur, Malaysia
Full-timeJul 2025 - Present

React/TypeScript web and mobile frontends for a production fintech platform, 9,000+ users.

  • Built bulk payment, swap, eKYC onboarding, transaction record flows for 9,000+ active users.
  • Led Flutter to React Native migration, unifying mobile + web to cut duplicate maintenance.
  • Reusable component patterns and shared UI primitives for cross-product consistency.
ReactReact NativeTypeScriptNext.jsFrontend ArchitectureFintechPayment Systems
Simpletruss

Frontend Engineer

Simpletruss·Kuala Lumpur, Malaysia
Full-timeJun 2024 - Jul 2025

Building enterprise property management SaaS. 500+ properties, 10K+ maintenance tickets monthly.

  • Component library with compound patterns, TypeScript generics, Storybook docs. 40% faster dev velocity, 60KB bundle reduction.
  • GraphQL layer: Apollo Client, 80% cache hit rate, custom hooks (usePaginatedQuery, useOptimisticMutation). Type-safe, zero prop-drilling.
  • Performance: Code splitting, virtualization for 10K+ rows, Zustand over Redux. 35% faster initial loads.
ReactTypeScriptGraphQLApollo ClientZustandMaterial UIStorybook

Key Projects

LessenPro

Scheduling engine, vendor coordination, maintenance tracking. 500+ properties managed.

ReactTypeScriptGraphQLMaterial UIApollo Client
Beyondsoft (Tencent)

Frontend Developer

Beyondsoft (Tencent)·Kuala Lumpur, Malaysia
Full-timeJul 2023 - Jun 2024

Analytics platform for Tencent, MiHoYo (Genshin Impact), major game studios. Millions of events/day.

  • Performance: Virtual scrolling (500K rows), Web Workers for parsing, debounced filters. Sub-3s loads at 60fps.
  • Quality: Jest standards, mandatory reviews, 40% fewer production bugs. Docker dev env: 4h → 30min onboarding.
  • Cross-team: Specs with Tencent engineers, cross-browser (Safari, IE11), China CDN optimization.
ReactTypeScriptReduxAnt DesignJestDockerWebpackGo

Key Projects

Databrain Global

Real-time player analytics. 100K+ row datasets, complex filters, interactive dashboards.

ReactUmi.jsAnt DesignTypeScriptGo
Finexus (Fintech)

Java Engineer Intern

Finexus (Fintech)·Kuala Lumpur, Malaysia
InternshipFeb 2023 - Jul 2023

First exposure to fintech production payment systems — legacy Java/JSP monolith, thousands of daily transactions. Foundation for current fintech work at dtcpay.

  • Fixed connection pool bug causing peak-hour failures. HikariCP + JMX monitoring → 99.9% uptime.
  • Deployment automation: Bash scripts for Tomcat WAR deploys. 4h → 2h per release.
  • Jasper Reports: Query optimization, indexing. 8s → 1.2s report generation.
JavaOracle SQLServletsJSPTomcatShell ScriptingJasper Reports
Techtics (Web3)

Blockchain Engineer Intern

Techtics (Web3)·Kuala Lumpur, Malaysia
InternshipOct 2020 - Jan 2021

Ethereum dApp during 2020 DeFi boom. Smart contracts, gas optimization, MetaMask.

  • Solidity contracts: Reentrancy guards, gas estimation UI, MetaMask signing. Deployed to mainnet.
  • Gas optimization: IPFS storage, batched transactions. 65K → 38K gas (40% savings).
ReactTypeScriptSolidityMetaMaskNode.jsExpressRedux

Education

My academic journey in computer science and software engineering.

Bachelor of Software Engineering (Honours)

Tunku Abdul Rahman University of Management and TechnologyKuala Lumpur, MalaysiaJun 2021 - Jul 2023

Specialized in distributed systems, parallel computing, and performance optimization. Built 15+ projects ranging from blockchain dApps to mobile applications. Core coursework: Data Structures & Algorithms (Java), Distributed Systems, Parallel Computing, Human-Computer Interaction, Graphics Programming. Electives: Mobile Development (Flutter), Blockchain Development (Solidity), Data Science (Python).

Achievements & Honors

  • Dean's List (Top 10% - GPA: 3.72/4.0)
  • Final Year Project: Travel Guide App presented to 50+ industry professionals
  • Secured Databrain Global (Beyondsoft) internship through university recommendation
  • Led student team of 4 for final year capstone project
Tunku Abdul Rahman University of Management and TechnologyView certificate

Diploma in Computer Science

Tunku Abdul Rahman University of Management and TechnologyKuala Lumpur, MalaysiaMay 2019 - May 2021

Basic Programming Concepts through various languages such as Object-Oriented Programming in Java, C, and Assembly Language. Mathematics courses included Algebra, Calculus, Statistics, Discrete Math.

Tunku Abdul Rahman University of Management and Technology

Let's Connect

Interested in working together? Feel free to reach out!