— Sebastian Jorna
Founder, investor, reader, builder.
From banker, to VC to serial entrepreneur.
From reader, to meditator, to artist.
Life rewards action.
01digital brain
▼
digital brain
▼A decade of notes, books and ideas, linked up in Obsidian. The thinking behind it: Fruits from My Digital Knowledge Tree.
screen recording of my Obsidian graph
02projects
▼
projects
▼Selection of things built on the side
NC Wedding Guide
site ↗
A curated directory of venues and vendors across North Carolina.
Ode to Life
site ↗
Funeral home directory.
HomeGym LED Coach
hardware
Raspberry Pi + 7" LED matrix wired into my HomeGym AI Coach — guides me set by set, rep by rep, right on the wall.
Medical Billing Agent
app ↗
AI agent that calls payers, handles denials, and resubmits claims so medical billers can focus on getting paid.
Obsidian ⇄ Anki
app ↗
Turns notes into spaced-repetition cards. Closes the loop between reading and remembering.
HomeGym Coach
site ↗
A personal trainer for your home gym.
Testament creator
app ↗
A gentle testament & will creator.
ReportAI Copilot
app ↗
An AI copilot that drafts police reports.
Baby Registry
site ↗
A simple, shareable registry and advice wall for our baby boy.
Subsidy Submission Agent
app ↗
A subsidy finder & application SaaS tool that surfaces eligible grants and tax credits.
Wikifolio Smart-Beta ETF
2015 — 17
My own instrument exploiting four market anomalies. Listed in Stuttgart — ISIN DE000LS9KGG8.
Stocktwits Financial Analyses
2015 — 17
Featured on the Stocktwits “Must-Follow List” for market commentary and strategy.
03CV
▼
CV
▼
Perimenopause platform. #1-ranked in its category on the App Store, 50k+ downloads, 40%+ D7 retention.
2025 — now
LLM Ops. Raised $1.7m from Gradient Ventures. Gave LLMs tool-use; pivoted when MCPs went open source. Featured on TechCrunch.
2023 — 25
Convexity Ventures — Investment Manager / LP
Started a private fund with nine other LPs — founders, developers, lawyers.
2021 — now
Early-stage VC, deeptech & B2B SaaS. Helped structure a €120m fund. Invested in ReaQta, Oqton, Kaizo, D2X
2020 — 23
inSided — Board Observer
Acquired by Gainsight & Vista Equity Partners.
2020 — 22
Morgan Stanley — Analyst, Tech M&A
$2.2bn TeamViewer IPO (largest software IPO to date). $1.1bn Delivery Hero ⇄ Takeaway.com sell-side.
2018 — 20
Education & credentials
MIT — ASP Fellow, AI & Neuroscience
2017 — 18
Frankfurt School — MSc Finance
Top 5% of class
2015 — 17
CFA
Passed all three levels in 18 months, the shortest time possible
2015 — 17
National University of Singapore — Exchange
2015
Maastricht University — BSc Economics
Top 6% of class
2012 — 15
Oxford — Summer School, Economics
2012
04writing
▼
writing
▼My essays on Medium
(written BEFORE ChatGPT release)
the full list
Dec 23, 2025
Dec 27, 2024
Jan 18, 2024
Dec 19, 2023
Nov 20, 2023
Nov 11, 2023
Mar 10, 2023
Feb 21, 2023
Feb 9, 2023
Jan 10, 2023
Jan 3, 2023
Dec 17, 2022
Dec 15, 2022
Dec 2, 2022
06art
▼
art
▼Expressions through paint, movement, and ecstatic dance DJ sets.
My latest Ecstatic Dance DJ set
07meditation
▼
meditation
▼Traveling Sangha NC
Host of a meditation community in North Carolina.
10d-day silent meditation retreats
Attended several 10d vipassana meditation retreats in addition to a multi-year daily practice. (2023, 2026)