Lang Gui

I'm Lang, an AI Engineer at EasyBee AI building multi-agent systems and production RAG pipelines. I ship AI-powered products from 0→1 — 10 apps in 10 weeks, from a winning AWS hackathon automated red-teaming platform to voice-to-PR agents.

BU Computer Engineering '25, Technology Innovation concentration. Ex-Cadence Design Systems.

Building for today's problems. Architecting for tomorrow's.

Experience

EasyBee AI

AI Engineer

July 2025 - Present · San Francisco, CA

•Built LangGraph supervisor agent with 3 sub-agents → reduced cold-start latency from 5s to 150ms
•Production RAG pipeline with Pinecone + GPT-4o → 40% improvement in booking conversion
•Deployed containerized AI system with Docker + GitHub Actions CI/CD

Cadence Design Systems

Machine Learning Engineering Intern

May 2024 - Aug 2024 · Austin, TX

•Led POC for thermal modeling feature → validated 5% performance gains
•Built 3D visualization tool for non-technical stakeholders
•Automated 500GB data pipeline → saved 8 hours/week of manual analysis

Terrier Motorsports

GLV Team Lead

2023 - 2024 · Boston, MA

•Led 5-engineer team to deliver 3 embedded subsystems using C++ and CAN bus
•Reduced input latency from 120ms to 72ms → completed 1 week ahead of deadline

Human Computer Interaction Lab

Research Assistant

Feb 2023 - July 2023 · University of Sydney

•Built Python models analyzing smartwatch data from 200+ users → 75% churn prediction accuracy
•Identified UI friction points → 15% engagement improvement

Selected Works

🏆 Hackathon WinnerAWS × DatadogPython

Crimson — AWS × Datadog Hackathon Winner

Automated red-teaming platform that discovers vulnerabilities in LLM-based agent systems. Four-stage multi-agent pipeline (Recon → Plan → Attack → Report) built on AWS Strands Agents + Bedrock probes target agents across 6 attack categories including prompt injection, secret exfiltration, and policy bypass. Features Neo4j attack surface visualization, Datadog trace deep-linking, and severity-rated vulnerability reports with actionable remediation steps.

Code Video

hackathon#10weeks10appsPython

Mafia Ace

AI-powered Mafia game built on the ACE (Agentic Context Engineering) self-improvement framework from Stanford. LLM agents play live Mafia rounds, reflect on their decisions, and evolve adaptive strategy playbooks without any weight updates.

Code Video

week8#10weeks10appsAI/LLM

VoiceCode

AI-powered voice-to-PR agent that lives in your online meetings (Zoom, Google Meet) and converts dev discussions into production-ready pull requests after the meeting. Supported by CodeRabbit, Daytona, and ElevenLabs.

Code Demo

week7#10weeks10appsPython

AdFlow

AI-powered video ad generator that transforms any product URL into professional short-form video advertisements in under 60 seconds. Features Claude Agent SDK orchestration, dual video providers (FreePik WAN 2.6 & Kie.ai Veo 3), intelligent product metadata extraction, and a FastAPI dashboard with real-time job tracking.

Code Demo

week6#10weeks10appsChrome Extension

WeRead

AI-powered Chrome extension that reduces article reading time by 12 min on average. Full-stack product with Chrome Extension (MV3), 7 serverless API endpoints, Stripe subscriptions, and Next.js marketing site. Features parallel AI processing pipeline (4 concurrent LLM calls in 3-5s), Google OAuth, and Notion-inspired UI with dual reading modes.

Code Demo

week5#10weeks10appsNext.js

MenuCopilot

Take a photo of a restaurant menu and get personalized food recommendations powered by AI. Features image analysis, preference questions, and intelligent dish suggestions tailored to your tastes.

Code Demo

week4#10weeks10appsChrome Extension

Prompt CoPilot

A Chrome extension designed to manage and utilize prompts with AI integration, enhancing user interaction with AI models. Features prompt templates, quick access, and seamless AI workflow integration.

Code Demo

week3#10weeks10appsNext.js

SF Weekly News Digest

AI-powered platform that aggregates and summarizes San Francisco news from 20+ local sources. Features weekly AI-curated summaries, interactive Q&A chatbot, and automated Saturday updates via Vercel Cron.

Code Demo

week2#10weeks10appsNext.js

SF Most Wanted Parkers

A Next.js app that tracks San Francisco's worst parking offenders using SFMTA citation data stored in Neon/Vercel Postgres.

Code Demo

week1#10weeks10appsReact

ReelOrFake

An application that challenges users to distinguish between original audio and AI-generated clones. Interactive game-based interface for testing audio authenticity detection.

Code Demo

JavaScriptHTMLMarkdown

Skimmd

Lightweight markdown document reader with live editing, auto-generated TOC, theme switching, and real-time file sync via SSE. Clean minimal interface for technical docs and note-taking.

Code Demo

ReactTypeScriptSupabase

AI Content Detective

React-TypeScript web app that detects AI-generated content in real time

Code

ROS2Embedded SystemsComputer Vision

Semi-Autonomous Cycle

COE Societal Impact Award winner. 92% navigation accuracy for visually impaired users

Code

LangGraphLLMAPIs

AI Travel Co-Pilot

Multi-agent LLM system. 40% increase in booking conversions

Code

CUDPESP32

Smart E-Voting System

Secure real-time P2P communication protocol using C and UDP for embedded system. ESP32-based fobs with IR transmission and bully algorithm for leader election

Code

ESP32IoTNode.js

FitCat - Activity Tracking

Real-time multi-cat activity tracking with ESP32-based collars. Full-stack IoT platform with accelerometers, displays, and live leaderboard

Code

ESP32PID ControlPWM

Personal Assistive Robot

Autonomous indoor navigation with Optitrack positioning, PID control, and real-time collision avoidance using Sharp IR sensors

Code

C++OOPGame Development

Pokémon Masters: Victory Road

2D Pokémon battle simulation with object-oriented programming. Dynamic gameplay mechanics including combat and Pokémon migration

Code

VerilogRISC-VDigital Design

32-bit RISC-V Processor

Instruction-pipelined processor with byte-addressable memory. Optimized data flow with execution halting and reset mechanisms

Code

Blog

10 Apps in 10 Weeks: What I Learned Shipping Fast

Feb 2026

Lessons from building and deploying one full app every week — from idea to production.

ShippingBuilding in Public

Building Multi-Agent Systems with LangGraph

Jan 2026

How I architected a supervisor agent with sub-agents at EasyBee AI to reduce cold-start latency from 5s to 150ms.

AI EngineeringLangGraph

From Hackathon to Production: Crimson Red-Teaming Platform

Dec 2025

How our team built an automated LLM security testing platform in 24 hours and won the AWS x Datadog hackathon.

HackathonAI Security