Eduardo Mazieri

Senior Product Designer

I build the systems and processes that let organisations design consistently, from a design system to the workflows that keep it working. Accessible by default, measured by results.

Approach

Design as an operational discipline

Design adds the most value when it shapes how an organisation works. I frame problems, own initiatives and turn research into insights, not just design assets.

Fluent in code

I’m proficient in frontend development (HTML, CSS and JavaScript), so I speak the same language as developers. We can iterate together instead of handing work over, which has been invaluable when managing projects from design through to delivery.

Evidence over opinion

Usability testing, A/B tests, benchmarking and interviews guide decisions, sometimes in a train station, asking travellers how they plan trips.

Accessible by default

WCAG is a design input, not a final check.

AI driven by results, not trends

AI strengthens the process: it connects documentation, surfaces gaps early and makes it practical to test more ideas. It supports judgment rather than replacing it. What matters in the end are the key results.

Selected work

TAG Design System

The Adecco Group · 2022–present · designsystem.adeccogroup.com

Collage of products built with the TAG Design System: Adecco, LHH and Akkodis web pages, a recruitment dashboard, a career assistant and job application forms.
Products and channels across Adecco, Akkodis, LHH and Pontoon built on the system.

Adopted by 100+ products, from 30+ business units, across 70+ countries.

Role
Senior UX Designer, owner of the design system for web
Web platform
The group-wide web platform used by every business unit
Brands
Adecco, Akkodis, LHH, Pontoon, Badenoch + Clark, Office Angels and more
Focus
Web library, guidelines, WCAG accessibility, governance, optimisation, AI-enabled documentation

Results

50%less time from content production to publishing
5,000%+increase in job applications over 3 years
40%more client leads generated via the platform
Every quarterQXscore improvements across core features

The problem

The Adecco Group runs dozens of brands, products and markets. Teams were solving the same interface problems in parallel, with inconsistent results, uneven accessibility and costly external tools. The group needed one shared foundation that could carry many brands without flattening them.

What I owned

There was no group-wide web platform before. We built it from the ground up, and I was involved from the early concept phase. I owned the design system for web that the platform is built on, and every business unit now uses it to run its websites. One set of components, patterns and guidelines now sits behind all of them. We did this with a lean team of 3 designers and 2 developers, where design system teams at organisations of this size often number dozens.

The system is structured as an experience architecture: brand-agnostic foundations and design tokens at the base, then components, modules and templates, with brand foundations layered on top.

Experience Architecture diagram: User Interface layers (Foundation, Components, Modules), User Experience layers (Flow, Features, UX Moments), Customer Experience layers (Stages, Product, Platform) and Integrated Experience (Portfolio).
The experience architecture, from foundations up to the full product portfolio.

Key decisions

Decision 1 — A shared process to build pages on the platform

Pages were being built in different ways in different markets, often with external tools. I defined the process and built templates for communication between design, marketing and development, so any team could brief, design and build pages correctly on the platform. This moved work off external tools and saved the company significant cost.

A process only matters if people use it. We went around the world onboarding teams market by market, which is how the system reached its current adoption.

Decision 2 — One web library and one set of standards for every brand

I started and owned the initiative to centralise the web library and standardise guidelines across all brands: content, assets, information architecture and accessibility. Instead of one library per brand, brands now share the same building blocks and apply their own foundations on top.

I managed the developer roadmap and workflow from start to finish. Every component is documented and linked across the design system hub (zeroheight), Storybook, Azure DevOps, Figma and Confluence, so designers, developers and product owners all work from the same source.

AI-enabled documentation

Documentation spread across five tools goes out of date quickly. I set up AI-enabled workflows to keep it connected and current:

  • Drafting. Component pages, usage guidance and release notes are drafted from the Figma specs and Storybook stories, then reviewed and edited by the team.
  • Updating. When a component changes, the related pages in the hub, Confluence and Azure DevOps are flagged and updated together instead of one by one.
  • Checking. Automated checks compare design, code and documentation and flag mismatches, missing states and accessibility gaps, so we can see whether each component still works as documented.
  • Handoff. Developers and agencies get consistent, structured specs, which cuts down back-and-forth during iteration.

Decision 3 — An optimisation hub tied to the journey map

Research and testing were happening in isolated pockets. I started the optimisation hub and its initiatives: A/B testing, usability testing, surveys and other research. I connected it to the customer journey map, so problems and opportunities are tracked against specific user journeys rather than in a backlog with no context.

Each item is prioritised by effort and impact, giving teams across the group a shared, evidence-based view of what to fix next.

Accessibility as a default

I provided WCAG expertise to design decisions, translating requirements into practical, usable patterns, and documented the scope, process, tooling and a testing checklist so accessibility is built in rather than checked after the fact.

Overview banner of the TAG Design System component library.
50+ documented components, from accordion to tree view.

Experience

2022 – Present

The Adecco Group

Senior User Experience Designer

  • Owned the design system for web, adopted by 100+ products from 30+ business units across 70+ countries, defining reusable components, patterns and guidelines that support consistency, accessibility and scalability.
  • Owned design initiatives from discovery and scoping through execution and delivery, aligning user needs, business goals and technical requirements.
  • Provided WCAG accessibility expertise to design decisions, helping teams translate requirements into practical, usable experiences.
  • Built processes for clear communication, feedback and iteration across design, development and internal stakeholders.
  • Implemented AI-enabled workflows for documentation, handoff and iteration.
2021

Podigee

Senior UX Designer

  • Collaborated with stakeholders and developers to define priorities and guide projects from concept to delivery.
  • Designed scalable experiences for onboarding and key features, supporting fast iteration.
  • Maintained end-to-end customer journey maps to identify opportunities for improvement.
2017 – 2021

fromAtoB

Senior UX Designer

  • Built and maintained a design system to improve consistency, usability and design efficiency.
  • Led design across cross-functional teams, aligning on user needs and guiding key product redesigns.
  • Conducted user interviews, usability testing and data analysis to inform design decisions.
Earlier

Web and e-commerce design

E-commerce, landing pages and hotsites for brands including Aerial Society, Your Last Straw, Xodó, Pharmapoint, Inellare and IgualSQN.

About

Skills
Front-end design · Systems design · Accessibility (WCAG) · Interaction design · User research · UX writing · AI
Frontend
HTML · CSS · JavaScript
Tools
Figma (variables, components) · Storybook · zeroheight · Azure DevOps · Confluence · UserTesting.com