Mozilla x Raffaele

Mozilla x Raffaele


More about my focus on Design System and UX

Granular System Decisions

Context - Shared Variables Dilemma

Design Tokens

User-friendly documentation for your component library with Storybook

Why Design System


About me

My principles
Favourite books? 📚
Favourite dishes? (spoiler: 🇮🇹)


Product Design Improvement
Outcomes-Based Planning


Interacting with stakeholder
Interacting with designers
Interacting with developers


My toolbox

Design Eng. Product Framework

Personal Development Plan

Product Requirements Document (PRD)

One on One

Feedback Session!

My questions


  1. How will you measure the success of the person in this position?
  2. What are some of the challenges you expect the person to face?
  3. Can you describe a typical day or week in the job?


  1. What are you hoping this person will accomplish in their first six months and in their first year?
  2. Thinking back to people you’ve seen managing the Design System previously, what differentiated the ones who were good from the ones who were really great at it?


  1. What type of people tend to really thrive here, and what type don’t do as well?
  2. What do you like about working here?

Product Chat

  • What are the main challenges you have at Twitter?
  • How is the collaboration between designers, PMs, devs?
  • How do you imagine the future of Twitter?
  • What's in your opinion the main opportunity at Twitter today?
  • What do you do when you fail?

Product Insights

  • How do you prioritise what to do?
  • How do you see the future of Twitter?
  • How do designers at Twitter relate to data and research?
  • What KPIs drive Twitter today and how are they defined?

Eng. Managers

  • How is the development cycle at Twitter? How is the process?
  • How do designers and developers work together?
  • How long do you take on average to release a new feature?


  • How do you learn?
  • What is the first thing you'll change at Twitter?
  • What do you guys do outside work?
  • Who's missing the office?

Design System Designer

WCAG for Designers Checklist

Copy of Design System Metrics
Copy of QA Checklist Quality of Components
Copy of Contribution Proposing Request