Portfolio · Vol. 001 · 2026
Senior Flutter
& iOS developer,
Firebase full-stack.
Available for senior engagementsBenicassim, Spain — available remotely
Fig. 01 — Marius Gutoi
I'm a Flutter and iOS developer focused on building high-quality, scalable, and user-friendly mobile applications. Over the past decade I've shipped apps across healthcare, food, IoT, navigation, and social — from solo builds to large international agile teams.
For the last three years I've specialized in Flutter, pairing it with Firebase as a full-stack backend to deliver features end-to-end: authentication, realtime data, push notifications, cloud functions, analytics, and hosting. I lead with Clean Architecture and BLoC so the codebase stays testable and evolvable.
A healthcare application for individual doctors to manage patient images and medical history. Built from the ground up in Flutter with Firebase as the full backend.
A QR-menu platform letting restaurants create, update, and manage menus with realtime sync across customer touchpoints.
Migrating a legacy iOS news & social app for fuel stations to Flutter, leading architectural decisions.
Migrated a medical wound-evaluation app from legacy iOS to Flutter with offline-first sync and measurement-hardware interop.
A working setup for dev / staging / prod Firebase projects in a single Flutter codebase using FlutterFire and flutter_flavorizr. Copy-paste friendly.
How I structure production Flutter apps into presentation, domain, and data layers — and why the boundaries pay for themselves the first time a backend swaps underneath you.
I'm currently open to senior Flutter engagements — contract or full-time, remote from Spain. Happy to chat about scope and timing.