About
Jonathan Kau is co-founder of Satsuma, which was acquired by Alchemy. He previously participated in Y Combinator.
jonathan @jonathankau
2026: vibe coding on mobile via starlink https://t.co/fN2eq5VR6d
Feb 3, 2026 Β· β₯ 3
jonathan @jonathankau
To counter inevitable outrage over sending tax docs to LLMs: - We shared docs with our CPA, who doesn't have robust infosec practices - I'd upload the outputs to LLMs for verification anyways If you're so inclined, you could replicate this setup with local LLMs in OpenCode
Jan 21, 2026
jonathan @jonathankau
Spent ~1 hr swapping between Codex & Claude Code Some observations: - CC doesn't do well with large PDFs (https://t.co/XBAjzqgwmv) - Codex has guardrails around generating tax docs, so I used it to plan and handed off to CC to implement
Jan 21, 2026
Founder at SatsumaYC S21
Intro paths
Jonathan went through Y Combinator (Summer 2021) β any YC alum in your network can reach them through the YC community.
In turn, Jonathan can intro founders to Satsuma's investors below.
Satsuma's investors Β· 3
Co-founders at Satsuma
Experience
- AlchemyProduct2023 β 2025
- SatsumaCEO & Co-Founder2021 β 2025
- Y CombinatorProduct Engineer2019 β 2021
- Checkr, Inc.Software Engineer2018
- PennyFounding Engineer2016 β 2018
- 17cowCTO & Co-Founder2015 β 2017
- ShypSoftware Engineer2015San Francisco, CA
- FacebookSoftware Engineer2015Menlo Park
- YelpSoftware Engineer2014San Francisco, CA
Education
- University of MarylandBachelor of Science - BS, Computer Engineering
Founder mafias
Y Combinator mafia8,668
Also came through, then founded or led a company.
+ 8,661 more
University of Maryland mafia61
Also came through, then founded or led a company.
+ 54 more
Alchemy mafia8
Also came through, then founded or led a company.
+ 1 more
Checkr mafia4
Also came through, then founded or led a company.
Same school
Also attended University of Maryland204
+ 198 more
Shared employers
Also worked at Alchemy17
+ 11 more
Also worked at Y Combinator336
+ 330 more
Also worked at Checkr, Inc.16
.avif)
+ 10 more
