About
Spencer Brown previously built a mortgage lending system that processed 2% of annual US mortgages. He has worked as an engineer at multiple early-stage startups and is now building an AI-driven mortgage lending platform.
Founder at ChestnutYC X25
Intro paths
Spencer went through Y Combinator (Spring 2025) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Diana Hu, General Partner at Y Combinator — the partner who ran Chestnut's batch and knows the company first-hand. YC profile ↗
In turn, Spencer can intro founders to Chestnut's investors below.
Experience
- NomboFoundercurrent2026 — presentSan Francisco, CA
- ChestnutFounder2025 — 2026San Francisco, CA
- LoanCrateCo-Founder, Head of Engineering, Head of Product2020 — 2024Los Angeles, CA
- HerophilusSenior Software Engineer2018 — 2020San Francisco, CA
- VariousConsulting2015 — 2020
- MixmaxSoftware Engineer2016 — 2018San Francisco, CA
- Rival IQIntern2015Seattle, WA
- Mitratech ContinuityIntern2014
- Exalted CollectiblesFounder2012 — 2013Granville, OH
Skills & more
+8 more
PhotoshopNode.jsJavaScriptBackbone.jsCMatlabPythonPython (Programming Language)From Spencer's professional profile.
Frequently asked questions
- Who is Spencer Brown?
- Spencer Brown previously built a mortgage lending system that processed 2% of annual US mortgages. He has worked as an engineer at multiple early-stage startups and is now building an AI-driven mortgage lending platform.
- Where does Spencer Brown work?
- Spencer Brown is Founder of Chestnut.
- What companies did Spencer Brown found?
- Spencer Brown founded Chestnut.
- Where did Spencer Brown go to school?
- Spencer Brown studied at Y Combinator (P25); Purdue University (Bachelor of Science - BS, Computer Science); Granville High School.
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
+ 4,709 more
Purdue University mafia79
Also came through, then founded or led a company.
+ 72 more
Same school
Also attended Y Combinator2,000
+ 1,994 more



















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