Mobile Portfolio
22 apps shipped. 30 million people use them. 5 awards won. $950M in revenue generated. Every app below tells that story.
17
Years
22+
Apps Shipped
30M+
Users Reached
#1
App Store
5
Awards
Industry Awards
Best UI/UX Gold Pin
MyMask App - Fisher & Paykel (F&P) Healthcare, New Zealand. Recognised for excellence in intuitive navigation and aesthetic innovation.
Most Effective B2C App
Domino's App - United Kingdom. Winner at the Effective Mobile Marketing Awards (EMMAs).
Most Effective B2B App
Domino's Drivers' App - United Kingdom. Winner at the Effective Mobile Marketing Awards (EMMAs).
Brand of the Decade
Domino's App - United Kingdom. Mobile Marketing Brand of the Decade at the EMMAs' 10th anniversary.
Energy Technology of the Year
Genesis Energy IQ - New Zealand. Winner at the Deloitte Energy Excellence Awards.
CIO Awards Finalist
Genesis Eco-Tracker App - New Zealand. Finalist for Sustainability through Technology.
Best Design Awards Finalist
Mercury Energy App - New Zealand. Finalist in Digital Products category.
Featured Works
Trade Me
Shopping Category
New Zealand's leading marketplace for property, motors, jobs, and products. Led modularization of 20-year-old app, increasing feature output by 50%.
Prêt A Manger
Global Brand
Official mobile app for iconic UK coffee and food chain. Features subscription management, store locator with walking/driving routes, daily soup menu updates, full menu with nutritional information.
Complete Catalog
The exhaustive library of mobile implementations and successful launches.
Audi NZ Stock List
iOS Developer / 2015
Eventfinda Consumer
iOS Developer / 2013
Eventfinda Promoter
iOS Developer / 2013
Mobilis
iOS Developer / 2012
EE VIP Wembley Arena
iOS Developer / 2014
Platopus Retail
iOS Developer / 2013
Platopus Mobile
iOS Developer / 2013
Testimonials
Dee most recently spent a number of months on a contract via myself. Dee is extremely polite and professional and I really enjoyed working with him for the duration of his contract. I would definitely recommend him and I am sure the client would have him back....they were terribly sad to see him go! Was a pleasure!
Cavelle Cheetham
Recruitment/Contract Manager
Dionysios was a great addition to Domino's iOS team, he was a pleasure to work with. He made sure all the tasks assigned to him were finished and as per specification. His focus kept everything moving smoothly, he made sure all the deadlines were met, and made sure that whatever task he was working on met the highest standards. I have absolutely no hesitation in recommending Dionysios.
Charu Jalota
Domino's iOS Team
Technical Stack
Core Engineering
iOS Native
Swift, SwiftUI, Objective-C
Android
Java, Kotlin
Cross-Platform
React Native, Xamarin
Performance
Multi-threading, Memory Management
Infrastructure
Cloud
AWS, Azure DevOps, Firebase
Architecture
MVVM, MVC, MVP, Repository Pattern
CI/CD
Bitrise, TeamCity, Jenkins, Azure DevOps
Testing
Unit Testing, Interface Testing
AI Development
Cutting EdgeClaude Code
AI Pair Programming, Custom Skills
Multi-Model AI
Claude, Gemini, ChatGPT
AI Workflows
Multi-Agent, Spec-Driven, TDD
Prompt Engineering
Workflow Optimization
“I don't just build apps; I architect digital assets that drive meaningful user engagement and tangible business results. Every line of code is written with scalability and long-term maintenance in mind.”