Hi, I'm Josh!

Josh Wang

Software Developer10+ yearsReact / AI WorkflowTaipei, Taiwan

10+ years of full-stack development experience (primarily front-end), spanning SaaS, cybersecurity, cross-border internal systems, and React Native. Led frontend architecture and delivery for 7+ web systems and 2 mobile apps using TypeScript, CI/CD, monorepo, and AWS. Focused on scalable frontend systems, AI-assisted development workflows, and legacy system modernization.

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Latest writing

All posts β†’

Hello! I'm Josh!

2026-09-12

A self-introduction that isn't quite a rΓ©sumΓ© β€” I'm using this space to collect some recent thoughts on AI, life, and travel.

writinglife

Projects

// Side projects & Open source

PickleScout β€” Web Scraping & Data Navigation

PickleScout β€” LLM-Driven E2E Test Generation Agent

AI AgentE2E TestingLLMOpen Source
  • Completed full POC in one week using AI-assisted workflow; open-sourced with browser agent, LLM pipeline, self-healing, and full-stack architecture
  • Designed two-pass LLM pipeline: Stagehand browser agent explores target app and records ActionLog, converted to Gherkin feature files and Playwright step definitions
  • Implemented self-healing mechanism: on test failure, LLM auto-patches selectors and timeouts and retries, improving generated test usability
  • Backend job queue (Fastify + BullMQ/Redis) decouples long-running LLM generation from requests, with failure retry and status tracking; generated output includes a GitHub Actions workflow with zero LLM dependency at runtime

Skill Tree

// Tech stack overview

Frontend

ReactNext.jsTypeScriptReduxTailwind CSSVue 3Nuxt.js

Back-End

Node.jsFastifyRailsKoaRESTful APIGraphQLRedisBullMQ

πŸ€– AI Workflow

Claude CodeMCPWindsurf

πŸ“± Mobile

React NativeTestFlight

βš™οΈ Architecture & Infra

MonorepoCI/CDGitHub ActionsGitLab RunnerDockerAWS

πŸ§ͺ Testing

PlaywrightJestCucumberRSpec

Experience

// Recent positions

Current

Full-Stack Engineer

Jun 2023 – Present

Independent

CI/CD Architecture & Security | Data Analytics SaaS Startup
  • Led CI/CD workflow restructuring, consolidating 5 fragmented branches into 2 and optimizing the monorepo structure to reduce operational overhead
  • Introduced Claude + Playwright MCP for automated Gherkin script generation, reducing regression risk and improving release stability
  • Performed critical security patching under time pressure, resolving CVE-2025-29927 and strengthening system security posture
Map System Development & Technical Debt Cleanup | Major Real Estate Group
  • Served as technical lead to fill development gaps, delivering complex map POI filtering features on tight deadlines
  • Rolled out a Claude Code + MCP-assisted development workflow on the existing codebase, cutting feature POC validation time from weeks to 1.5 days
  • Led systematic module decomposition and refactoring to resolve legacy architectural debt at the root
Real-Time Trading Feature Development | Vue 3 + Nuxt.js
  • Took over an existing Vue 3 + Nuxt 3 + Pinia project, extending real-time trading features within its established architecture conventions
  • Integrated TradingView Widget and ECharts for real-time price feeds, order book visualization, and data analytics

Front-End Developer (Platform & Architecture)

Oct 2021 – Jun 2023

TeamT5 (Cybersecurity)

ThreatSonar Product β€” Frontend Architecture Planning
  • Led frontend architecture planning for the frontend/backend separation, producing technical specs and architecture design docs as the implementation foundation
Official Website & Event Pages (CYBERSEC 2022/2023, InterOp23)
  • Led cloud architecture migration from Firebase/Cloudinary to AWS S3/CloudFront + Next.js, reducing cloud costs by 90% and improving reliability
  • Refactored 50%+ of the legacy codebase and implemented an AWS SDK/TypeScript/Pica.js file-upload system with auto-thumbnail generation
  • Built CYBERSEC 2022/2023 and InterOp23 event pages with Preact.js + Tailwind CSS, deployed via AWS S3 + CloudFront
  • Identified plaintext password transmission and auth design flaws in an external vendor system; escalated and drove remediation

Front-End Lead

May 2019 – Oct 2021

OEC Group

B2B/B2C Back-office System
  • Led frontend rebuild using React Hooks and Context API with real-time WebSocket messaging, covering internal systems across 50+ countries
  • Designed 100-field single-page forms using Formik / Yup / React.memo with strict validation and performance control
  • Proposed and adopted GitHub Actions CI/CD pipeline as an early adopter upon its launch in Aug 2019
Website Redesign / Internal Training
  • Took over external vendor's HTML/CSS and completed Next.js + i18n architecture (13 languages) within one month
  • Led Pull Request Code Review culture to improve code quality and ensure requirement alignment

Web Developer

Jul 2014 – Apr 2019

Startups (Fullinn, CatFi, myTreat, Ecowork)

Full-stack Architecture & API Design | Fullinn, myTreat, Ecowork
  • Led frontend architecture with Next.js SSR to build an SEO-optimized hotel booking website builder; first client ranked on Google's first page within one week of launch
  • Built OTA platform and order system with React.js / GraphQL, and led initial REST API design conventions to streamline backend development
  • Delivered full-stack features and a standalone customer service back-office using Rails and Angular.js
Mobile & Cross-platform Development | Fullinn, CatFi
  • Built cross-platform mobile apps with React Native, Redux, and Redux-saga for state and side effect management
  • Integrated Firebase Push Notification and Code Push to reduce deploy costs and streamline push services
  • Adopted Fabric and OneSignal for crash reporting and push; integrated WebRTC / RTMP streaming
Testing & Dev Workflow | Ecowork
  • Implemented Cucumber and RSpec to fulfill client test report requirements; assisted DevOps in building automated test environments
  • Introduced Vagrant-based deployment workflow to unify dev environments for faster onboarding

Contact Me

// Feel free to contact me 🐱

spjay1@gmail.com

Taipei, Taiwan

Passionate about sharing perspectives; rarely the quietest one in the room.