Marius Gutoi, Developer in Benicàssim, Spain
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Marius Gutoi

Bio

Marius is a Flutter specialist who develops high-quality mobile apps using Dart, RxDart, CLEAN architecture, and Firebase. His strong technical foundation and previous iOS experience enable him to deliver robust, user-centered solutions across multiple platforms. Marius enjoys collaborating with clients to transform complex requirements into smooth, performant mobile experiences that deliver measurable value.

Portfolio

Fueled
Flutter, Dart, Firebase, Codemagic, Node.js, TypeScript, Claude Code...
Swift Medical Inc.
Swift, Core Data, iOS, Bluetooth, AVCaptureSession, Leadership, Video Capture...
Fooder Ltd
Parse Server, AWS Elastic Beanstalk, Amazon S3 (AWS S3), Swift, Objective-C...

Experience

  • iOS - 8 years
  • Leadership - 6 years
  • Flutter - 4 years
  • Clean Architecture - 3 years
  • Firebase - 3 years
  • RxDart - 3 years
  • Dart - 3 years
  • Swift - 3 years

Preferred Environment

MacOS, Xcode, Visual Studio Code (VS Code), Cursor AI

The most amazing...

...app I've developed is Wonderfood. It is a social app for food lovers. A recent app that I've developed is DigiCatch, an app that aggregates fishing data.

Work Experience

Senior Flutter Developer

2026 - 2026
Fueled
  • Built and maintained a news and social media app for fuel stations, migrating from legacy iOS to Flutter.
  • Led architectural decisions using CLEAN principles and BLoC, ensuring scalability and testability.
  • Implemented Piano authentication, push notifications, deep linking, and offline support.
Technologies: Flutter, Dart, Firebase, Codemagic, Node.js, TypeScript, Claude Code, Full-stack, API Integration

Senior Flutter/iOS Developer

2022 - 2025
Swift Medical Inc.
  • Built and maintained a medical app for wound evaluation, migrating from legacy iOS to Flutter.
  • Led architectural decisions using CLEAN principles and BLoC, ensuring scalability and testability.
  • Implemented offline-first features with Realm Database, supporting seamless data sync.
Technologies: Swift, Core Data, iOS, Bluetooth, AVCaptureSession, Leadership, Video Capture, User Experience (UX), Flutter, Dart, RxDart, Clean Architecture, Realm, REST APIs, Camera API, Application State Management, CI/CD Pipelines, Cross-platform App Development, API Integration

Co-founder | Senior iOS Developer

2017 - 2020
Fooder Ltd
  • Co-founded this company and took part in all crucial project decisions, including Wonderfood.
  • Worked as one of the two developers who built an iOS app and its back end (Parse Server).
  • Added analytics events/data to better understand user behavior and maximize conversion rates.
Technologies: Parse Server, AWS Elastic Beanstalk, Amazon S3 (AWS S3), Swift, Objective-C, iOS, Firebase iOS SDK, App Store, Push Notifications, Google Maps API

Senior iOS Developer

2017 - 2018
Baze Labs
  • Implemented different UI flows and performed some fancy animations.
  • Developed a network layer (Moya) and persistence layer (Realm).
  • Handled complex architecture features like offline support and deep linking.
Technologies: Swift, Moya, Realm, iOS, REST APIs, Push Notifications

Senior iOS Developer

2013 - 2015
YouWowMe Ltd
  • Served as a technical reference for all team members and helped to recruit new members.
  • Contributed to all decisions regarding the application architecture, especially regarding the application of the best design patterns.
  • Implemented many parts of the application that required a range of technical knowledge.
Technologies: Objective-C, AFNetworking, HTTP REST, VoIP, iOS

Experience

DigiCatch

A Swift-based application meant to help fishermen.

I composed the proposal based on business requirements, and after approval, I implemented it. I used RxSwift, Moya, Kingfisher, SnapKit to handle the core part of the application. Other technologies were OR code scanning, NFC scanning, MSAL authentication, push notifications, and offline storage.

JennAi‪r‬

A RxSwift based app for easier control of JennAir Whirlpool appliances. Users can manage various appliances like ovens, cooktops, refrigerators, dishwashers. I spent most of the time discussing requirements, giving estimates, developing features, writing unit tests.

Wonderfood

https://wonderfoodapp.com/
Wonderfood is a social app for food lovers. Users share food pictures and find new dishes by searching among the hundreds of photos uploaded by the community every month. The app allows easy interactions between users and enables following others.

Hive | Smart Home

https://www.hivehome.com/
A home-automation app is part of an ecosystem that includes both own and third-party equipment.

I was part of a squad that dealt with integrating partner products, e.g., the Philips Hue suite. This project was developed in both Swift and Objective-C.

Baze App

An integrated platform allows users to achieve their best health through a science-led, results-driven food and supplement platform.

I was involved in the iOS application design and then was in charge of implementing different features of the application.

WowApp

https://www.wowapp.com/
WowApp is a social platform that allows users to win rewards and support different causes. This comes from user activities that typically don't come with rewards, e.g., play games, shop, place international calls, complete surveys, perform tasks, and engage in the network.

Education

1993 - 1998

Master's Degree in Computer Science

Politehnica University of Bucharest - Bucharest, Romania

Skills

Libraries/APIs

RxSwift, Firebase iOS SDK, Parse SDK, CocoaPods, Kingfisher, REST APIs, SnapKit, Camera API, Google Maps API, Node.js, Mantle, AVCaptureSession, Stripe

Tools

Auto Layout, Xcode, Fastlane, SwiftLint, Moya, Git, Claude Code, Codemagic

Languages

Swift, Dart, Objective-C, TypeScript, C++, Pascal, Assembly

Frameworks

UIKit, Flutter, RealmSwift, iOS SDK, Cocoa Touch, AFNetworking, Core Location, Core Data, Stripes

Platforms

iOS, MacOS, Firebase, AWS Elastic Beanstalk, Amazon Web Services (AWS), Parse Server, Visual Studio Code (VS Code)

Paradigms

Unit Testing, Model View ViewModel (MVVM), Test-driven Development (TDD), RESTful Development, Mobile Development, Reactive Programming, Functional Reactive Programming, Continuous Integration (CI), Agile Product Management, Clean Architecture

Storage

Cloud Firestore, Amazon S3 (AWS S3), Realm, Databases

Other

Application State Management, Flow Coordinators, Software Consulting, Architecture, User Interface (UI), App Store, Push Notifications, Cross-platform App Development, Full-stack, API Integration, Networking, Security, HTTP REST, VoIP, Bluetooth, Leadership, Video Capture, User Experience (UX), RxDart, Cursor AI, Google Play Store, CI/CD Pipelines

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