Marinos Zinonos

Software Engineer

Android and Flutter engineer with 5+ years of experience delivering mobile applications across healthcare, banking, and consumer domains. Experienced in leading migrations, building from scratch, and working within large teams.

LinkedInGitHub

Experience

January 2025 - January 2026

Mobile Developer

Synbiotix Solutions Ltd

  • Led the full migration of a legacy Xamarin application to a native Android solution using Kotlin, Flows, and Jetpack Compose.
  • Integrated complex SOAP-based APIs.
  • Designed modular components to allow reusability across multiple products.
  • Delivered software used within the UK healthcare sector, including NHS clients.

October 2023 - January 2025

Software Engineer - Mobile Banking Development

Hellenic Bank Public Company Ltd (Eurobank)

  • Developed new features and resolved existing issues in the mobile banking application, which has over 300,000 active users.
  • Collaborated within a large engineering team through code reviews and close coordination with backend developers.
  • Led technical sessions with product managers to analyse features, estimate work, and contribute to roadmap planning, while also presenting updates to upper management.

January 2023 - July 2023

Backend Developer

Anyscript Ltd (Factory 39)

  • Contributed to the mobile shim backend of a large global e-commerce platform while working remotely with a London-based engineering team.
  • Developed APIs used by mobile, with Kotlin and Spring Boot.

July 2020 - January 2023

Android Developer

Axiom Consulting Ltd

  • Built loyalty and rewards solutions for several Cypriot organisations, including Bank of Cyprus, in close collaboration with the senior developer.
  • Worked on module development to allow reusability across multiple projects.

Independent Projects

LegalMatters

2026

Mobile portal featuring YouTube content sync via the YouTube Data API, real-time chat between users and the host, and push notifications, all backed by Firebase. A companion Next.js admin panel allows the host to manage conversations and send notifications.

FlutterDartFirebaseYouTube Data APINext.jsiOSAndroid
WebsiteApp StorePlay Store

Eventus

2025

Mobile event discovery app with map-based search, rich filtering, and local preference persistence via Hive. Backed by Firebase and integrated with the Maps SDK. A companion Next.js platform serves event organisers and venues, who subscribe via Stripe to access event management features.

FlutterDartFirebaseMaps SDKHiveNext.jsStripe

InMobi CMP Flutter Plugin

2025

Flutter plugin integrating InMobi CMP SDK with native Kotlin and Swift support for GDPR/CCPA consent workflows.

FlutterKotlinSwiftGDPR/CCPA
GitHub

E-mbracelet

2024

Native Android MVP suite for an ASD assistive platform — a companion smartwatch app that continuously reads biometric data and syncs it to a mobile app for analysis, visualisation, and server upload. Built with Kotlin and MVVM clean architecture.

AndroidKotlinAndroid JetpackMVVMFirebaseWear OSRoom Database

Supersport 104

2023

Media streaming application delivered for both iOS and Android using Flutter.

FlutterDartRiverpodiOSAndroid
WebsiteApp StorePlay Store

OMEGALIVE

2022

News and media application for iOS and Android with a cross-platform Flutter architecture.

FlutterDartGetXiOSAndroid
WebsiteApp StorePlay Store

Skills

Mobile Development

Kotlin
Java
Android SDK
Jetpack Compose
Coroutines

Cross-Platform

Flutter
Dart

Architecture & APIs

REST APIs
SOAP APIs
JSON/XML
Firebase
Hilt/Koin

Tools & Workflow

Jira/Scrum
Gradle
Git

Contact

Open to new opportunities. Let's connect.

+357 96378445LinkedInGitHub