Jonathan Guzman

Product DesignerModeSound

I am a product designer in San Francisco, shaping Phloe, an iOS study app I co-founded. Previously, Quizlet and 1Flow (YC W22).

I’m interested in understanding what people want, need, and expect, and translating that into flows, micro-interactions, and interfaces.

Let’s talk

Work

A Phloe question about plant cells, with a cell diagram and four answers

2026

Phloe4,309 questions, timed to forgetting

The Quizlet streak widget on an iOS home screen

2022

Let’s Get EngagedA streak you could actually see

Career

PhloeCo-founder, designNow2026–nowCo-founder, design

Career breakBiology & Psychology, Foothill College2024–2026Biology & Psychology, Foothill College

QuizletProduct design intern2022Product design intern

1Flow (YC W22)UI/UX designer, contract2022UI/UX designer, contract

Friends of Figma at SJSUStudent leader2022–2023Student leader

RondivooFounding designer2021–2023Founding designer

Speaking

Flipping the script: Student-Led Panel, at Figma

Flipping the script: Student-Led PanelFigma

Field Notes

Map the Task Before the ScreenSeptember 2026 Build Mobile Personas That LastAugust 2026 Mobile UX Research at AI SpeedAugust 2026 How to Design for How People FeelJuly 2026

Contributions

428 contributions this year

References

“Jonathan designed the UI for two apps I built, and both times he elevated the product well beyond what I could have achieved alone. Honestly, he designs in his sleep.”

Chris CorderoiOS Software Engineer at Yahoo

“I was impressed by Jonathan’s ability to generate multiple iterations and seek feedback on how to improve them.”

Mike CastroStaff Product Designer at Quizlet

Elsewhere

X@jonathanlguzman GitHubjonathanlguzman LinkedInin/jonathanlguzman