Sebastian Johannessen

About me

I'm Sebastian, a CS student at UCLA and a product manager, currently at Popcorn, where I build agents for supply-chain ops.

I started in physical products. In high school, I founded a bike-refurbishment business. Since then, I've worked mostly in AI and fintech.

I care a lot about how things work and how they feel, and I spend real time thinking about the way people actually use them. Always happy to talk to people building interesting things.

Work

• Popcorn

  Jun 2026 - Present

  Product Manager Intern

  • Building AI agents that automate supply-chain operations

• PayPal

  Mar 2026 - Jun 2026

  Product Manager

  • Driving product strategy to grow Venmo student adoption

• Uber

  Jan 2026 - Apr 2026

  Product Manager

  • Leading MVP and GTM strategy for a new Uber Eats feature

• Tilura

  Jun 2025 - Sep 2025

  Product Manager Intern

  • Shipped an AI/ML financial analysis product

• CycleWorks Studio

  Mar 2020 - Sep 2025

  Founder & CEO

  • Scaled bike refurbishment venture to $50k+ in revenue

Leadership

• Dorm Room Fund

  Jun 2026 - Present

  Fellow

  • Venture Capital

• Product Space at UCLA

  Apr 2026 - Present

  External Vice President

  • Sourcing clients

• Association for Computing Machinery (ACM)

  Oct 2024 - Present

  Technical Lead

  • Building demo apps to teach 200+ students

Projects

• Genie

  • Chrome extension for UCLA course discovery

• LingoBuddy

  • AI language learning (1st Place, LA Hacks 2025)