Principal Engineer | UI Platform, DevEx & Design Systems Systems thinker working at the intersection of engineering, design, and technology.

Lisbon, Portugal [email protected] | antoniofreire.me | Linkedin | GitHub

Summary

Focused on UI platform engineering, developer experience, Design Systems, and technical governance across Product, Design, and Engineering.

Operating across frontend architecture, multi-brand Design Systems, open-source strategy and governance, accessibility, performance, automation, security and engineering standards.

Currently extending this work into AI-native engineering, exploring RAG, MCP, agentic architectures, and human-in-the-loop workflows for developer experience, design-to-code, accessibility, and engineering automation.

My background in Design brings purpose, taste, and craft to how I approach technology and systems.

Core Strengths

• Systems thinking & architecture: connecting product needs, engineering constraints, design, governance, and long-term maintainability.
• UI platform engineering: shared frontend foundations, architecture, standards, integration patterns, and paved roads across teams.
• Design Systems: multi-brand architecture, design tokens, theming, component libraries, accessibility, and design-to-code workflows.
• Developer experience: tooling, CI/CD, testing, release workflows, observability, documentation, and automation.
• Open source & governance: contribution models, release processes, technical standards, security controls, and sustainable ownership.
• Technical leadership: cross-team programs, architecture decisions, hiring, mentoring, stakeholder alignment, and developer enablement.

Technical Areas

• Architecture & Platforms: distributed web systems, REST, GraphQL, WebSockets, Server-Sent Events, SSR, edge rendering.
• Design Systems & UI Platforms: design tokens, theming, component architecture, Storybook, accessibility, design-to-code automation.