Conference Agenda March 2026

Complete schedule for Into Design Systems Conference 2026. March 19-20 online. 14+ sessions on AI Design Systems, Vibe Coding, MCP integrations. Speakers from WhatsApp, Miro, Indeed, Adobe, GitHub, Figma.

Day 1 - March 19, 2026

Day 2 - March 20, 2026

WhatsApp Web: Reclaiming UI Excellence through Vibe Coding

The WhatsApp Web design system serves hundreds of millions of users, yet it's maintained by a team of just one designer and one engineer. That constraint forced us to rethink how design work gets done.

The key has been compressing the traditional design-to-engineering handoff. Instead of specifying, documenting, and waiting for every small change, I've started shipping code directly to production using Claude and VS Code.

In this talk, I'll walk through my workflow, how I explore and audit an unfamiliar codebase, migrate design system assets into production, and the lessons learned along the way.

Key Learnings

Who is this for

Design system practitioners, product designers, and content designers who want to move faster, reduce friction, and take more ownership of what ships.

Speaker

Sebastian Rousseau, Senior Product Designer Design Systems at WhatsApp. Sebastian Rousseau leads the Web and Windows Design System at WhatsApp, serving hundreds of millions of users worldwide. With over a decade of experience in large-scale design systems, he focuses on how design systems become lean multipliers under constant change, and how AI-powered coding tools like Claude and VS Code are reshaping what designers can ship. He specializes in vibe coding workflows that eliminate traditional design-to-engineering handoffs, allowing designers to ship code directly to production.

Tags: Vibe Coding, Design Systems

Vibe Coding
Design Systems

WhatsApp Web: Reclaiming UI Excellence through Vibe Coding

Live
30 MIN + Q&A

About this Session

The WhatsApp Web design system serves hundreds of millions of users, yet it's maintained by a team of just one designer and one engineer. That constraint forced us to rethink how design work gets done.

The key has been compressing the traditional design-to-engineering handoff. Instead of specifying, documenting, and waiting for every small change, I've started shipping code directly to production using Claude and VS Code.

In this talk, I'll walk through my workflow, how I explore and audit an unfamiliar codebase, migrate design system assets into production, and the lessons learned along the way.

From my session, you will learn:

  • How to use VS Code to audit apps, explore code, and prototype interactive features, without engineering support.
  • How designers can confidently ship high-quality code in large-scale codebases.
  • How designing in code eliminates error-prone handoff processes and improves collaboration with engineers.

Who is this for?

Design system practitioners, product designers, and content designers who want to move faster, reduce friction, and take more ownership of what ships.

Presented by:

Sebastian Rousseau, Senior Product Designer Design Systems at WhatsApp, expert on vibe coding, VS Code, Claude AI, and maintaining large-scale design systems for hundreds of millions of users, speaking at Into Design Systems Conference 2026

Sebastian Rousseau

he/him

Senior Product Designer Design Systems

WhatsApp

Sebastian Rousseau leads the Web and Windows Design System at WhatsApp, serving hundreds of millions of users worldwide. With over a decade of experience in large-scale design systems, he focuses on how design systems become lean multipliers under constant change, and how AI-powered coding tools like Claude and VS Code are reshaping what designers can ship. He specializes in vibe coding workflows that eliminate traditional design-to-engineering handoffs, allowing designers to ship code directly to production.

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AI Bonus content included

120 minutes total of on-demand AI sessions (multiple sessions combined) pre-recorded during our events. Available instantly to all conference ticket holders. Access immediately after purchase.

Spotify MCP

How their Design System team built their MCP

Cursor Prompting

Best practices so AI generates the design you expect

Context-based DS

How to work with helpful plugins and workflows

WhatsApp Web: Reclaiming UI Excellence through Vibe Coding | Conference 2026