Eli Rousso

Slate is a private journal that stays on your device. Designed, built, and operated solo.

• Reached 13,000+ downloads across 118 countries within the first 46 days of launch.^‡
• Grew to 750+ paying customers across 82 countries.^‡
• Converted approximately 31% of completed free trials into paying customers.^‡

Rams provides design and accessibility review for developers, built into the way they ship.

• Delivered 7,700+ design and accessibility reviews across 4,000 repositories.^‡
• Weekly review volume grew roughly fourfold in a month, without paid acquisition.^‡
• Flagged 26,000+ interface issues, from inconsistent spacing to inaccessible contrast.^‡

HSLA0001 is my independent studio behind Slate, Rams, and my other software.

• Build and operate a portfolio spanning consumer apps, developer tools, subscriptions, and one-time purchases.
• Created Framework: four focused apps for writing, focus, and habits, each built around a single daily practice.
• Shipped Autobahn, an open-source kanban board that turns markdown files into a working project board.

Multi offered self-custody Bitcoin without the fear. Founded it and ran it as CEO, 2021 to 2024.

• Split keys across your own devices with multi-party computation, so no single phone, laptop, or piece of paper could lose the vault.
• Designed custom hardware alongside the app: a steel key that recovered a vault or paid with a tap.
• Brand, app, and hardware, designed and shipped as one product.

Product Design Principal at Cash App, 2017 to 2021.

• Led the vision and architecture for v3 and v4.
• Set the bar for design quality across the product.
• Established Design Principles, Critiques, and Reviews.

Additional experience at Square, Shopify, Squarespace, Whatnot, Faire, Compass, Oscar, Mirror, Huge, and Gin Lane.