Josiah Kumpel

Cubista (hire #1, leading product)

Seed stage startup. Founded by two multi 8-figure entrepreneurs.

Built the product: took a one-sentence idea through PRD → design (hired and managed the firm) → engineering (led two separate teams of 5) → shipped twice.

Told the story: pitch deck (built from scratch, multiple iterations), demo videos, designed and built the website, refined the sales positioning.

Learnings: momentum is the lifeblood startups run on; action over everything; willingness to learn + tenacity is 100x more important than resume or credentials.

Side Projects / Consulting

Can vibe code well (research → outline → code → manage git → ship). Know how to game Reddit to rank on Google and AI search. Have also dabbled in the broader GTM world: PPC, Meta ads, cold email/SMS, UGC.

College

I interned at Goldman Sachs & PwC (learned a ton but craved more agency than you can find in a finance job). I was also the Chief Investment Officer of $600k student-led endowment fund.