Juwen Lie

Mechanical reliability validation for IP cameras and CCTV — IPX6/IPX7 waterproofing, water-leakage testing, focus/SFR, lens-holder design, antenna and cable routing, acoustics and spring/pin mechanisms — carried from EVT through to mass production, with root-cause analysis using measurements and tolerance stack-up.

Led 6–12 month EVT-to-MP programmes across 2–3 concurrent Wi-Fi projects (1–3 SKUs each), aligning PM, ME, EE, RF, quality, factory, suppliers and customers. Led a team of 2 engineers and mentored 5–7 in NPI, failure analysis, measurement and part approval.

A budgeting app you can share like a Google Sheet, with an interface built only for money. A 2-minute onboarding quiz on needs, wants and behaviour assigns one of six money personalities (Squirrel, Owl, Butterfly, Lion, Dolphin, Turtle) and turns your take-home pay into needs / wants / savings / investing envelopes, adjusted for rent, debt and your emergency fund. Track spending in an editable sheet (sort, filter, CSV), watch the left-to-spend ring and pace chart, and get warnings at 80%, over the limit, or when your pace will overspend, including when someone else's edit tips a category. Persona-aware tips appear now and then. Goals, plus an investing portfolio with target allocation, drift, rebalancing trades and a growth projection. Sharing is local-first and end-to-end encrypted (AES-GCM, key in the link fragment) with cell-level merging, presence and an activity feed, over ntfy.sh or a self-hostable stdlib relay. Free on every platform: the web app, an iPhone home-screen app (plus an unsigned IPA for sideloading) and a signed Android APK, built by GitHub Actions with Capacitor around the same live site, with haptics, the native share sheet, the Android back button and invite deep links. Version 1.2 adds a cleaner, neutral design system, four languages (English, Bahasa Indonesia, 简体中文, Español; auto-detected, switchable in Settings) and a shareable money-animal result card. Version 1.3 makes it simpler: a 30-second setup (name, take-home pay, who it is for) builds a ready budget with the quiz now optional, a Getting started checklist guides the first steps, and new expenses are auto-categorised from your history and everyday words in four languages. No account and no build step: plain HTML/CSS/JS.

Honest device-health copilot for Mac, Windows, Linux, iPhone and Android. Simple mode by default: one plain-words status, one “Fix everything safely” button (undoable for 3 days) and an optional weekly automatic care switch. Safety-graded storage cleaning where every cleanup sits in a 72-hour Undo Vault with measured before/after receipts; a goal planner (“free 10 GB without touching downloads”); a transparent health score; battery wear forecast, Drain Detective and idle-drainer alerts; a baseline that learns your normal; and a chat that diagnoses from plain words and runs reversible fixes. Installs with one copy-paste (app icon, starts at login, Python set up automatically on Windows); pair a phone by scanning a QR code. Zero-dependency Python agent + offline PWA, local-only, no telemetry.

Offline-first workspace for hardware/mechanical R&D: NPI task flow, OK/NG/NA review checklists, issue log and one-page project report, 11 calculators (Cpk, x̄ − 3σ, torque window, stack-up, snap-fit, thermal pad, IEC openings, ΔE) and an optional stdlib-only file vault server. Ships with generic demo data; real content loads from a private data pack.

41 landmark and character miniatures — world wonders, skyscrapers, Snoopy, Mobile Suits, Marina Bay Sands and the Eiffel Tower. New: a 100 mm Kobo-chan figurine revised for Formlabs Form 3, with strengthened crown hairs, checked STL and colored STEP files, a suggested orientation and print notes. PreForm supports, resin settings and a test print are still required.

A tiny animated pet that lives on your desktop and taskbar: 23 animals in three groups — land animals walk, water animals swim and blow bubbles, sky animals hover and flap. Drag it anywhere, click to tickle it, rub to pet it; it has real moods (happy, sad, tired, hungry, grumpy), naps when you're away and greets you when you're back, and delivers break, water and eye-rest reminders in cute chat bubbles. Fully customisable colour, size and name, in English, Bahasa Indonesia, 繁體中文 and 简体中文. Click the pet to open Pips: an always-on-top Pomodoro timer with soundscapes, live app-usage tracking, a daily 1–5 star score, goals, streaks, a dashboard and history. Easy Windows installer; Python is included. Focus history stays local; optional social features use the Pips online service.

Offline parametric CAD builder and engineering copilot: diagnoses broken models, plans repairs, checks clearance and motion, and exports STL, OBJ, glTF, 3MF and DXF.

Python + Playwright assistant for a Windchill-based PLM part-approval (AML) workflow: searches the part, starts the workflow, assigns the project, creates or re-links the approval documents, fills the final or conditional approval form (customer-assigned or not), adds the reviewer, verifies every field and stops before Submit. Four one-click launchers and a step-by-step training deck for new users. v0.1 preliminary release.

Downloadable Windows console with a locally bundled controller, serial port chooser, camera tools, macros and offline demo. A PIN-protected on-device Bluetooth remote adds wireless pan, up/down, LED control and a real motor stop from Android or iPhone (Bluefy). Camera → Share to phone streams the AIRIZ camera to phones by link or 6-digit code over WebRTC, with an HTTPS frame relay (Cloudflare Worker) that keeps it working on company networks that block WebRTC. The browser and mobile-web editions remain available.

One home, one free account, three AI apps. GlowLead: give one goal and the AI lead plans it, hands each step to GlowChat or the GlowRoom crew, checks the work against clear done-criteria and reports back. GlowChat: chat with any model (ranked by category), your own persona, images, a usage meter, temporary chats, a Council with a Judge and an Arena. GlowRoom: an AI crew that searches the web, runs code and cites sources, in a warm Glow Studio office. One avatar in every app opens Profile & settings: name, Puter account, persona, token usage and allowance, privacy and your data. Speaks your language: pick English, Bahasa Indonesia, 简体中文 or 繁體中文 and your region on first open; the region decides which AI models you get (only providers that serve mainland China there, with PIPL consent and DeepSeek/Qwen/Kimi/GLM key presets), plus local prices and privacy notes. Free for guests.

Twin is an iPhone-ready investing and trading companion with a clean, professional design (1.5.1: new design system, line icons, dark and light themes) that updates itself the moment a new version ships (1.5.2). New in 1.13: two wallets, one picture — move practice money between your US dollar portfolio and the Twin Indonesia rupiah wallet at the delayed mid rate minus a 0.5% practice spread; both ledgers update together (in one revision-checked request on your own server, or in this browser on the web demo), moved money counts as money put in so returns stay honest, and Portfolio and Me show both wallets and the combined total. From 1.12: the Twin Indonesia rupiah wallet shows on Home and Me, syncs to your Twin account on your own server (conflict-safe across devices), and Indonesian, crypto and gold headlines come from every feed through the server or refresh hourly on the web demo. From 1.11: Twin Indonesia, the rupiah side of Twin at twin/id/ — IDX stocks in 100-share lots with price steps and broker fees, US stocks at the shown USD/IDR rate, crypto and gold priced in rupiah, community rooms with Scam Shield, an Analyst Desk whose ideas are scored against real prices, and nine interactive lessons, with a separate rupiah practice wallet. From 1.10: a premium landing page and the premium look on every tab — glowing portfolio card on Invest, gradient academy and colourful course tiles on Learn, rounded Trade and News cards, and a big avatar header on Me. From 1.9: a premium dark design with a glowing balance hero, quick actions, swipeable cards and a Buy/Sell dock on every stock. From 1.8: big bold numbers, soft borderless cards, pill buttons, coloured ticker badges, a floating glass tab bar, charts that draw themselves in, count-up portfolio value and swipe-to-close sheets. New in 1.7: real-time prices from your own Interactive Brokers, Alpaca or Finnhub account with the source shown on every stock page (Yahoo stays the labelled, delayed fallback), a read-only IBKR gateway self-test, Qatar and Abu Dhabi holiday calendars, daily backups of your data and a safe updater. From 1.6: the web demo covers about 280 stocks and ETFs on 35+ exchanges plus 34 indices, refreshed hourly; market status follows real exchange calendars (holidays, early closes); FX rates refresh every minute with their time shown; and real orders can go through Interactive Brokers for world exchanges as well as Alpaca for US listings. From 1.5: TwinAgent, a free research team of five analysts (trend, SEC-filed fundamentals, risk, relevance-screened headlines, famous investors' 13Fs) that argue a bull and bear case from cited, dated evidence; a portfolio manager rates the stock and a risk gate built from your own limits sizes or blocks the idea. No AI subscription, the same evidence always gives the same report, future data is filtered out, and a walk-forward scorecard tests the price evidence over decades against buy-and-hold. Search stocks by company, ticker or country — Tokyo, Hong Kong, Jakarta, London, Frankfurt, Mumbai, Toronto, São Paulo, Sydney and more — with exchange, currency, market status and next holidays, ≈ USD price with the FX time and US-listing hints on every stock page. World markets shows market clocks, 34 indices, movers and a heatmap; practice trades in a separate $10,000 USD portfolio convert foreign prices at current FX rates, and totals can be shown in your home currency (25 currencies). Continue as guest or share a ?guest link; market, limit, stop, stop-limit and trailing orders with brackets, price alerts, scrub charts with SMA/EMA/RSI, portfolio X-ray with country and currency exposure, a bar-by-bar Replay Lab and 12 Twin Academy lessons. The local server searches any Yahoo Finance listing; the web demo uses an hourly snapshot of about 280 global stocks and ETFs. Optional real trading on the local server through your own Alpaca (US) or Interactive Brokers (world exchanges) account, with preview, confirm, caps and submission-time checks. Not financial advice.

Picture-to-text reader with crop, rotate, batch, history, read-aloud and translation into 16 languages, plus an always-on-top overlay that translates Microsoft Teams captions live. Windows app with a Share-to-phone QR pairing so iPhone and Android can read pictures with the camera through the laptop. Now also includes a translation desk: paste text and translate it with a tone, context, glossary, alternatives and word-choice notes, using the company AI, local AI on the laptop (Ollama) or offline packs.

Barber marketplace with haircut shorts, live on the decentralised Fade Network or your own server: real accounts, end-to-end encrypted bookings and DMs, direct payments (PayPal, Venmo, Cash App, Stripe links, bank/QR, Lightning) with a 0% fee, private-by-default, recallable push notifications and 2 h reminders, automatic transcoding, nudity checks that don't trust the uploader's app (re-checked by the server, or by every viewer's device before anything is shown), human review of new accounts' first posts, built-in violence/weapon/hate-symbol checks (Sightengine) and a hook for CSAM hash-matching services, evidence export for moderators, re-upload blocking and spam filters, moderation that reaches even the offline demo, and 5–10% creator commissions when a short sends a booking.

Turns a rough app idea into a scored spec, a task board and a Build → Grow → Earn plan, then hands it to Lovable, v0, Cursor or Claude Code in one click. Its local agent Otto drafts brand, site and posts. Fully offline.

Browser studio for faceless explainer shorts in English and Bahasa Indonesia: write scenes, add voice, export a captioned 1080×1920 MP4 and post to YouTube, TikTok and Instagram.

Browser shorts studio for your own audio: sped-up, slowed and mashup styles, a CapCut-style 9:16 editor with captions, and 1080×1920 MP4 export for TikTok, Reels and Shorts.

Desktop creator studio: generate a video from a prompt, refine it in the editor and publish to every platform at once — plus bulk uploads and automatic media backup.

Offline-first personal hub for communication and growth — manage replies, commitments and summaries on a zero-dependency Python + SQLite backend. Now with a Ctrl/⌘K command palette, keyboard-first triage, undo on every action, a drag-and-drop Kanban board, a focus timer and light/dark themes. Includes Orbis Chat: real-time messaging between real accounts with teams, channels, email invites, read receipts, typing indicators and push notifications that arrive even when the app is closed — on web, iPhone and Android.

Offline-first review app across 32 categories, from food to AI tools, with a built-in Use it / Wait / Skip scorecard. Now with a Ctrl/⌘K command palette, keyboard shortcuts, undo, saved reviews and light/dark themes with custom accents.

An unofficial Traditional Chinese learning app for 發一光耀. Learners sign in with a free Puter account (progress syncs across devices) or continue as a guest; admins publish lessons, quizzes, handouts and events from a dedicated admin console backed by a versioned content repository. Includes an AI study companion that cites lessons and materials, quizzes, plans and makes flashcards, plus interactive lessons, spaced-repetition review, streaks, a usage guide and offline support. Also available as an Android app (APK download); iPhone users get a guided, free home-screen app, or can sideload the native app with a free Apple ID. Points, giving and chat remain demos; no payments or official certification.

Sync lets friends hear the same song at the same second from anywhere, with no shared Wi-Fi or Bluetooth. Spotify, Apple Music and YouTube listeners share one room, each hearing it on their own service. You can also share your own audio files peer-to-peer, and voice chat lowers the music while friends talk. The Android app keeps playing in the background and with the screen off, with lock-screen controls; on iPhone it installs from Safari to the home screen. No account or server: rooms run device-to-device over WebRTC.

Live template marketplace for Excel / Google Sheets: describe a sheet in English or Bahasa Indonesia and Mint AI designs it, tweak it with words (“add column Supplier”), export a real .xlsx with live formulas and a dashboard, then sell it — buyers pay the seller directly — instantly through the seller's own Midtrans, Xendit or Stripe checkout (QRIS, e-wallets, VA, cards; the file unlocks by itself) or via their payment link with seller confirmation, with tracked affiliate commissions and payouts. Recovery codes, formula-free previews of paid templates, listing reports, order badges and Web Push notifications; Android app (APK) and iPhone Add to Home Screen. Cloudflare Workers + SQLite Durable Object backend.

Bachelor research project, Aerospace Engineering, Tamkang University (Jan 2022, advisor Dr. Yang-Yao Niu). Derived the eigenvalues and flux-difference splitting of a time-derivative (Weiss–Smith) preconditioned system for the quasi-1-D Euler equations, then implemented it in a Fortran finite-volume solver (MUSCL reconstruction with Roe’s approximate Riemann solver). Validated on a diverging nozzle with supersonic inflow and both supersonic and subsonic outflow, comparing Mach number, pressure, density, temperature and velocity against the analytical solution and the Roe, Steger–Warming and Van Leer schemes.

End-to-end coordination of water-tank fabrication across Indonesia: schedules, BOM and stock, Bill of Quantity cost models, trash-rack cutting plans, installation cost analysis and pipe installation for new housing — plus Chinese-language coordination with China-based vendors.