A list of all my contributions ❤️
- OSS projects
- Instructor/Consultant
- Articles
- Speaker
- Plugins and utilities
- Inspiration
- Activities I inspired
- Social links
At Preply, we shared the Design System Visual Coverage, a new way to measure the impact of Design Systems from the users' perspective. It's a sort of RUM (Real User Monitoring) for Design Systems, after extensively working and battle-testing it in production.
I created a GitHub repository/book, UI Testing Best Practices, aiming to share my knowledge about UI/E2E Testing and creating a starting point for every browser testing lover.
- August, 2024 - Javascript Testing, a Practical Approach @ Banca CF+
- April, 2024 - Javascript Testing, a Practical Approach @ Zelando
- February, 2024 - Javascript Testing, a Practical Approach @ Apropos / Accenture
- June, 2023 - Automatic frontend code generator @ Platformatic
- May, 2023 - Frontend project assessment @ Jointly
- Apr, 2023 - Javascript Testing, a Practical Approach @ Apropos / Accenture
- Apr, 2023 - Javascript Testing, a Practical Approach @ Apropos / Accenture
- Apr, 2023 - Javascript Testing, a Practical Approach @ Plannix
- Apr, 2023 - Javascript Testing, a Practical Approach @ Apropos / Accenture
- Apr, 2022 - Javascript Testing, a Practical Approach @ Shopware
- Jan, 2022 - Javascript Testing, a Practical Approach @ ORS
- Aug, 2021 - Javascript Testing, a Practical Approach @ Neratech
- Jul, 2021 - Javascript Testing, a Practical Approach @ Apropos / Accenture
- Jul, 2021 - Front-end testing on steroids with Cypress @ JSDay (Course description - Conference)
- Apr, 2021 - Javascript Testing, a Practical Approach @ Apropos / Accenture
- Jun, 2020 - Cypress course @ Educative.io
- Oct, 2019 - Front-end Testing week @ Talent Garden's CodeMaster 2019 (w/ Giacomo Zinetti - Course website)
- Oct, 2019 - React Testing 101: component, integration, and end-to-end testing @ ReactJSDay (w/ Jaga Santagostino - Course description - Conference)
- Dec, 2018 - E2E Testing with Puppeteer @ Frontenders Ticino (Slides - Meetup - Repository - FETI)
- How Preply improved INP on a Next.js application (without React Server Components and App Router) (Preply engineering blog - dev.to)
- You may have heard of the article:
- ⭐️ Listed by Addy Osmani
- ⭐️ Read by Alex Russell
- ⭐️ Shared by Nadia Makarevich
- ⭐️ Featured on ThisWeekInReact newsletter #223
- ⭐️ Featured on Frontend at Scale newsletter #42
- ⭐️ Featured on webperformance.recipes
- You may have heard of the article:
- Design System visual coverage
- Visual coverage: Why and How Preply Measures the Impact of the Design System (Part 1/2) (Preply engineering blog - dev.to)
- The Implementation Details of Preply’s Design System Visual Coverage (Part 2/2) (Preply engineering blog - dev.to)
- ⭐️ Presented at Into Design Systems conference: here you can find the article they wrote about it, and the resources we shared).
- ⭐️ Presented at the JSDay conference: here is the talk description, and the slides.
- ⭐️ Presented at one of Belka’s AMA: here is the recording (in Italian).
- ⭐️ Presented at one of the Commit to Growth’s episodes: here is the recording.
- Some things I learnt from working on big frontend codebases (dev.to - Medium)
- ⭐️ Featured on dev.to Top 7 Featured DEV Posts from the Past Week
- Frontend Platform use case - Acting before a real Product need (dev.to)
- Frontend Platform use case - Enabling features and hiding the distribution problems (dev.to)
- Frontend Platform use case - Creating a roadmap without a Product Manager (dev.to)
- Production-grade gradient bordered, transparent, and rounded button (dev.to)
- Hasura E2E tests chronicles, February 2023 (dev.to)
- Improving UI tests' code with debugging in mind (dev.to)
- One long E2E test or small, independent, ones? (dev.to)
- Improving Hasura's Internal PR Review process (dev.to - Hasura blog)
- Decouple the back-end and front-end test through Contract Testing (dev.to)
- Re-building a branch and telling a story to ease the Code Review (dev.to)
- A Case History: Analysing Hasura Console's code review process (dev.to)
- Hasura Console UI coding patterns
- Testing (dev.to)
- My take on Snapshot Testing (Medium - dev.to)
- Keeping TypeScript Type Guards safe and up to date (a simpler solution) (dev.to)
- ⭐️ Featured on ThisWeekInReact newsletter
- The challenges of rendering an OpenLayers map in a popup through React (dev.to)
- ⭐️ Featured on ThisWeekInReact newsletter
- Speed up E2E tests for Vite-based apps (dev.to)
- How I ease the next developer reading my code (dev.to)
- From unreadable React Component Tests to simple, stupid ones (dev.to)
- How I strive for XState machine, types, and tests readability (Medium - dev.to)
- Support the Reviewers with detailed Pull Request descriptions (Medium - dev.to)
- WorkWave RouteManager UI coding patterns
- Migrating a 150K LOC codebase to Vite and ESBuild
- Creating a book-driven course: is it worthwhile? (Medium - dev.to)
- Choose what NOT to study and focus on one thing at a time (Medium - dev.to)
- Reimplementing the core Recoil’s APIs for fun and learning (Medium - dev.to)
- UI Tests Debugging Best Practices (Medium - dev.to)
- Unit Testing React components with Cypress (Medium - dev.to)
- Testing a Virtual List component with Cypress and Storybook (Medium - dev.to)
- Some UI testing problems and the Cypress way (Medium - dev.to)
- Software tests as a documentation tool (Medium - dev.to - LinkedIn)
- Launching “$ npm run” programmatically with
npm.run()(Medium - dev.to - LinkedIn) - New to front-end testing? Start from the top of the pyramid! (Medium - dev.to - LinkedIn - Cypress blog)
- Who watches the watchmen? Mutation testing in action (Medium - dev.to - LinkedIn)
- Front-end productivity boost: Cypress as your main development browser (Medium - dev.to - LinkedIn)
- ⭐️ Also appreciated by Kent C. Dodds
- The concept of “Monitoring Tests” (Medium - dev.to - LinkedIn)
- Component vs (UI) Integration vs E2E tests (Medium - dev.to - LinkedIn)
- Await, do not make your E2E tests sleep (Medium - dev.to - LinkedIn - Cypress Blog)
- React Hooks Memorandum (Medium)
Generic chats
- Nov, 2025: Señors @ Scale (Summary, Recording)
Design System Visual Coverage
- May, 2025 - Into Design Systems (Resources)
- Apr, 2025 - JSDay, along with Matteo Ronchi (Slides)
- Sept, 2025 - DevStandup (Recording - Tldraw)
How to measure the impact of a Design System
- Sep, 2024 - Belka's AMA (Recording (in Italian))
Frontend scope of the Platform teams
- Sep, 2023 - Continuous Delivery's webinar (Recording (in Italian))
Some things I learnt from working on big frontend codebases
- Feb, 2025 - Commit to Growth (Podcast - Recording)
- Aug, 2023 - Educative.io webinar (Recording (requires login) - Related article)
The long road to remove the flakiness from the Hasura Console E2E tests
- Feb, 2023 - Continuous Testing Meetup Berlin (Slides - Recording - Related article)
How I avoid the next developer swearing at my code
- Oct, 2022 - ReactJSDay (Recording - Slides - Conference - Related article)
- ⭐️ Favorite talk of the conference
- Feb, 2022 (remote talk) - Fabio Biondi's Twitch (Recording (in Italian) - Code)
Testing Best Practices
- Jun, 2024 - Gitbar podcast (Podcast - Recording (in Italian))
- Oct, 2022 - ReactJS Milano (Slides - Meetup - Related article - Recording (in Italian))
Deepening a thing at a time
- Jun, 2021 (remote talk) - Ticino Software Craft (Slides - Meetup)
- Jan, 2021 (remote talk) - FEVR (Slides - Meetup - Recording (in Italian) - FEVR - Making transparent slides)
- Sep, 2020 (remote talk) - Cypress UK Community (Slides - Meetup - Recording)
Front-end testing on steroids
- Jul, 2021 (remote talk) - Web Marketing Festival (Slides - Conference)
- Apr, 2020 (remote talk) - Fabio Biondi's Twitch (Post - Recording (in Italian))
- Sep, 2020 (remote talk) - London's CityJSConf (Slides - Conference - Recording)
- Jun, 2020 (remote talk) - Javascript - developer Italiani (Facebook group - Recording (in Italian on a closed Facebook group))
- May, 2020 (remote talk) - JS Monthly London (Slides - Meetup - Companion repository - Recording)
- May, 2020 (remote talk) - Vienna's TestBustersNight (Slides - Meetup - Companion repository)
Breaking the fear of front-end testing
- Jan, 2021 (remote talk) - RomaJS (Slides - Meetup - Recording (in Italian))
- Feb, 2020 - Milano Frontend (Slides - Meetup - Milano Frontend)
- Feb, 2020 - Como Front End (Slides - Meetup - Cafe - Recording (in Italian))
- Nov, 2019 - JavaScript Community Day (Slides - Event - Javascript - developer Italiani)
- Nov, 2019 - Uqido (Slides - Event - Uqido - Article and recording (in Italian))
Mastering UI Testing
- Oct, 2019 - Voxxed Days Ticino (Slides - Conference - Recording)
- Jul, 2019 - Working Software conference (Slides - Conference - Companion repository - Recording)
UI Testing Best Practices
- Jun, 2019 - FEVR (Slides - Meetup - Recording (Italian) - FEVR)
- May, 2019 - Milano Frontend (Slides - Meetup - Recording (Italian) - Milano Frontend)
E2E Testing with Jest and Puppeteer
- Feb, 2019 - Como Front End (Slides - Meetup - Cafe)
- Jan, 2019 - PugMI (Slides - Meetup - post - pugMI)
- Figma Select and Inspect (Figma Community - GitHub)
- Figma to XState (Figma Community - GitHub)
- Cypress Wait Until (NPM -
GitHub)
- Cypress Protobuf (NPM - GitHub)
- Cypress OTP (NPM -
GitHub)
- Platformatic CLI
frontendcommand (GitHub - Platformatic docs) - Gatsby Iubenda Cookie Footer (NPM - GitHub - Gatsby)
- Gatsby Preconnect
(NPM -
GitHub - Gatsby)
- VSCode Increase by 1 (VS Code marketplace - GitHub)
- Bitcoin Address Soft Regex Validation (NPM - GitHub)
- Cypress React Devtools (GitHub)
- gitbook-plugin-head-append (GitHub - NPM)
- WhatsApp Messages Batch (GitHub)
nprr(Deprecated! Please check out https://fig.io/ or https://github.com/antfu/ni as possible alternatives) (NPM - GitHub)
I got inspired by:
- Quincy Larson's skills/reputation/network tweet
- Shawn Wang's Learn In Public
- Kent C. Dodds' Intentional Career Building
- Tim Urban's Inside the Mind of a Master Procrastinator talk
- Cedric Chin's Are You Playing to Play, or Playing to Win?
- Rodolfo Siles' Activity-Based vs. Results-Based Management
I always push other professionals to work more in public, here is a list of activities others have done thanks to my insistence 😅
| Activity | What I did |
|---|---|
| Article: How Preply reduced costs by 46% before scaling LLM features. | I proposed Sviatoslav to write the article, and reviewed it. |
| Article: Front-end testing at Preply: shifting left towards component testing. | I pushed Dominika and Lukasz, helped during the writing phase, and constantly reviewed the article. |
| Article: Shipping with Empathy: Engineering Habits That Put Users First. | I pushed Gregory and Alberto, helped during the writing phase, and constantly reviewed the article. |
| Talk: ReactJS Barcelona Meetup — Memory Leak Debugging & High-Performance. | I pushed Asier to convert the article into a talk and jump on the stage. |
| Article: Managing Dynamic Database Credentials with HashiCorp Vault: a Step-by-Step Guide. | I inspired Dmytro with an internal talk at Preply about working in public. |
| Article: Frontend memory leaks, from mysterious crashes to stability. | I pushed Asier to work in public, reviewed the article. |
| Article: How SimLocal reduced frontend complexity: Migrate from Webflow and React into Remix. | I pushed Asier to work in public, reviewed the article. |
| Talk: Pain Driven Development is good for business. | I pushed Dario to jump on the stage and tell about their amazing product development journey. |
If you got inspired by me and you'd like to show up in the above list, reach out to me 🤗.