Yifeng Gu
Analytics professional in New York. This is my personal site, and the place where I build and test AI agents at home.
What this site is
My personal home page, plus a lab where I build with AI. Three parts:
Career and life
My professional background and what I do outside work. Keep scrolling.
How my AI setup runs
A NAS serves this site. A Mac mini runs my AI agent, with models, devices and tools wired in.
Read the stack →Things I use myself
A real estate return calculator and a daily market summary.
REI Calculator →Market →Professional Background
Investment banking, then analytics across financial services.
Started in sell-side TMT investment banking, then spent years in analytics roles spanning B2B payments, payroll, business lending, and B2C lending and banking.
Outside work: water, trails, and real estate.
Sell-side TMT investment banking
Analytics spanning B2B payments, payroll, business lending, and B2C lending and banking
How it runs
A small home setup: one machine serves the public site, another runs my AI agent.
The public part is small on purpose. The interesting part runs on my internal network.
Synology NAS running nginx in Docker. It serves this site.
Mac mini on my internal network only. It runs the AI agent (Hermes) as a playground.
Anthropic Sonnet as the primary. Anthropic Fable 5.1 and OpenAI Astra 6 as secondary. Model routing is in progress.
Android tablet, Android phone, iPhone, smart glasses and more.
Send texts, place calls, use messaging apps, and operate devices end to end.
Love to Travel
30 US states and 10 countries so far — more coastlines still ahead.
United States
Including Alabama, Mississippi, and the Yellowstone Grand Loop.
World
Austria, China, France, Germany, Greece, Italy, Malaysia, Singapore, Turkey, and the United States.
Notes & artifacts
Short AI explainers and interactive pieces. More will land here over time.
Calculator
Enter assumptions in their usual periods. The result waterfall converts everything to annual.