Expert Frontend Engineer

Stefania Mellai

Hi, I'm Stef. I craft intangible software artifacts using React, HTML and CSS, with a special eye on accessibility. I love to build good UX and DevEx, and I care about monitoring and observability of production software.

Coding

React, TypeScript, CSS/SASS, HTML, Node.js

Accessibility

WCAG, accessible UI implementation, testing, audits, advisory

Design Systems

React components, design tokens, Storybook, usage auditing & metrics

Testing & Quality

Playwright, Jest, Vitest, axe, BrowserStack, linting customization

Developer Experience

CLI tools, migration scripts, automation, auto-updating docs, internal frameworks and libraries, open source

AI Tooling

Claude Code, custom skills, reusable AI abstractions

Observability

Datadog, Grafana, frontend monitoring, custom dashboards, performance monitoring

Leadership

Cross-team influence, mentorship, engineering forums, internal workshops

Writing

Think about your future self Jimdoverse
Postcards from your Design System Jimdoverse
Boosting testing efficiency: how semantic HTML transforms E2E testing HTMHell - Guest Post
Dear developer, your assumptions are wrong HTMHell - Guest Post
#31 additional "assistance" HTMHell - Guest Post

Speaking & Coaching

CES - Arrow / Arduino Booth - Exhibitor
Jan 2019 - Las Vegas
Workshop "Building connected objects" – SUPSI - Tutor
2018 - Lugano
CSSday - Speaker
2018 - Faenza
Django Girls - Coach
2016 - Turin
Maker Faire Rome - Software demo, user testing - Exhibitor
2015 & 2016 - Rome
Web Summit - Software demo - Exhibitor
2015 - Dublin
Torino JS - Speaker
2015 - Turin