Embeddable product UI
React component libraries that live inside customer applications without leaking styles, state, or assumptions into the host app.
Alexander Schwarzmann
Frontend systems for AI products.
I build React and TypeScript systems that hold up under product pressure: embeddable interfaces, design systems, editor architecture, testing pipelines, and delivery rails for teams shipping with AI in the loop.
Now
AI workflow infrastructure
Record/replay testing, drift checks, and engineering protocols that make AI-assisted development reviewable and repeatable.
Design-system architecture
Reusable primitives, themed components, Storybook workflows, CI gates, and migration paths that keep product teams moving.
Selected work
Courier / Embeddable notification designer
2024–2026Architected a React-based designer and component library for email, push, SMS, and in-app notification templates, with TipTap editing, tenant-scoped authentication, and Courier delivery integration.
Propel / Public UI Kit
2023–2024Main contributor to a TypeScript component library: chart components, CSS Modules migration, theme foundations, Storybook workflows, and release-oriented library packaging.
RapidAPI / Design system from scratch
2020–2023Created the company design system foundation across primitives, polymorphic components, Storybook, monorepo workflows, CI, and cross-product integration.
crealytics / Incremental frontend migration
2015–2019Led a Backbone and CoffeeScript to React and GraphQL migration while product delivery continued, adding reusable components, tests, and a documented UI system.
Writing
Long-form notes will live here. The through-line is the same as the work: durable frontend systems, AI-era engineering discipline, and the practical details that make software easier to change.
- — AI-assisted engineering that still has tests, boundaries, and ownership
- — Embeddable frontend systems: theming, host isolation, and API design
- — Design systems as product infrastructure, not a component catalog
For teams with fragile AI-generated codebases, I also offer architecture audits and production hardening.