Sthefano Schiavon

Experience

Nov 2024 – Present

Started the Flutter app from scratch with one other developer and built it out into the client coaches and athletes use on iOS and Android.
Went from occasional changes on the web dashboard and the API to delivering features end to end across all three codebases. Claude Code is what made working outside my strongest stack practical, and I have produced more here than in any earlier role.
Wrote tests as part of the work rather than after it: unit and widget tests in the Flutter app, and tests alongside the changes on the API and the web client.

Jul 2023 – Nov 2024

Moved the app off reading its data straight from Firebase and onto the REST API, together with the other Flutter developer. Both paths had to keep working side by side for a period before the Firebase reads could be dropped. Firebase Auth stayed, and still issues the token the API checks.
Wrote a custom TextEditingController for user mentions, after going through the available packages and finding none that fit the format the backend expected. The backend stores a mention as a user id rather than a handle, so the controller converts id to handle and handle back to id as the user types, and keeps each mention's range aligned as the user edits the text around it.
Fixed the same post going out of sync across feeds. A post can appear in the main feed and in a group feed at the same time, each held by a separate controller with its own copy, so a like registered in one did not reach the other. I added a typed event stream that every consuming controller subscribes to, so an update applies to all copies of the post.

Apr 2022 – Jun 2023

Shipped version 2.0 with a senior developer: a rework of the interface and experience carrying new content, delivered in Jira sprints and published on Google Play and the App Store.
Upgraded Flutter and migrated the codebase to null safety on my own initiative, keeping it on a parallel branch; a developer-experience and static-analysis argument at the start, it became a release one when the stores stopped accepting builds from the old version and the upgraded branch was the one that got through.
Fixed production defects on a board separate from the 2.0 work, often from reproduction steps that did not reproduce, shipping the fixes as hotfix builds off their own branches and bringing the crash rate down.
Treated a defect found here as a defect in the B2B build as well: the two shared an origin, so where the same bug was present I filed the task against the B2B app myself and implemented the fix there too, rather than closing only the ticket I had been handed.

Apr 2020 – Apr 2022

Rebuilt the chat product from scratch (Deal Talk) for Android, iOS and Web from one Flutter codebase, moving web routing to Navigator 2.0 and fixing WebSocket handshake authentication in the backend; reached Google Play with real users in test cities.
Sole Flutter developer on a short-video feed (Fatal Share) built from scratch, hand-managing video controllers within a bounded window to balance playback stutter against low-end device memory.
Shipped a single Flutter codebase to Android and the browser (Fatal Chat) while Flutter web was still in beta, tracing behavior differences and substituting libraries that held up on both rather than forking for web.