6x founder

Shantanu Joshi

engineer and company builder

Founder

Lume· Summer 2020🇺🇸 United States

2026Founder· Sourdough Tax

Founder · since 2015

Company

Sourdough Tax

Role

Founder

current

Stage

—

no public source

Raised

—

no public source

Based

Los Angeles, CA

current

Founder / co-founder — the company's markEmployee / research role

Profile coverage5 of 7 · missing posts, contact

Lume

Experience

Career

Sourdough Tax
Founder
Founder · Los Angeles, CA · 2026 – Present
2026
Self-employed
Angel Investor · 2020 – Present
2020
Milk Infrastructure
Founder
Founder · Los Angeles, California, United States · 2023 – Present
2023
Vivian Health
Engineering Lead · San Francisco Bay Area · 2022 – 2023
2022
Lume (YCS20)
Co-founder
Co-founder · 2019 – 2022
2019
Verta
Software Engineer · San Francisco Bay Area · 2019
2019
Vapor.ai
Founder
Founder · San Francisco Bay Area · 2018 – 2019
2018
AppZen
Data Scientist & ML Engineer · San Francisco Bay Area · 2018
2018
Tortoise AI
Founder
Founder & CEO · 2017 – 2018
2017
Machine Learning Consulting
Founder
Founder · New York, United States · 2015 – 2017
2015

Building