Hi, I'm

Mirelle Sine

iOS Software Engineer & product builder

I build thoughtful, scalable products inside the Apple ecosystem, from design system foundations and modular architecture to server-driven interfaces shipped to millions of people.

  • Swift
  • SwiftUI
  • UIKit
  • Design Systems
  • Server-Driven UI
  • ARKit
Let's talk See selected work
Portrait of Mirelle Sine
Apple, Swift Student Challenge Winner 2024
5M+ people using the app

In production

Wefit, iOS Software Engineer

Since May 2025

Digital banking and insurance product for Porto, used by more than five million people. Swift and UIKit on a modular VIP architecture, with REST APIs, Firebase Analytics, XCTest / XCUITest and CI/CD.

5M+

People using the product every day.

~60%

Faster feature development after I led the Design System migration from UIKit to SwiftUI.

~50%

Faster UI delivery after implementing core components of a Server-Driven UI architecture.

Design system

Led the migration of the product's Design System from UIKit to SwiftUI.

Server-driven UI

Implemented core components of a Server-Driven UI architecture.

Architecture

Feature development in Swift and UIKit on a modular VIP architecture.

Quality

REST APIs, Firebase Analytics, XCTest / XCUITest and CI/CD pipelines.

Apple Developer Academy Computer Science Swift Student Challenge Winner, 2024
Selected work

Products I designed and engineered

Seven shipped iOS products: an award-winning SwiftUI experience, an augmented reality game, two narrative games, and apps across well-being, skincare and watchOS.

Hidden Stories, illustrated scene of women in science and technology
Hidden Stories, guided narration scene
Hidden Stories, Ada Lovelace story card
Hidden Stories, DNA interaction scene
Hidden Stories, scene in colour
Apple, Swift Student Challenge Winner 2024 One of 350 winners worldwide

Hidden Stories

An interactive experience that surfaces the stories and contributions of women in science and technology. Illustrated scenes introduce each figure, and her story opens as a reading card in place, with content served over a REST API.

  • SwiftUI
  • REST API
  • iPadOS

Problem

These contributions are rarely told in a form people actually want to explore.

Approach

A guided, illustrated narrative in SwiftUI with story cards opening in place.

Platform

Built for iPad, with content and copy delivered from a REST API.

Result

Winner of Apple's Swift Student Challenge 2024, 350 selected worldwide.

Every project, in detail

Hover or tap a project →
Hidden Stories, illustrated scene
Hidden Stories, Ada Lovelace story card
Hidden Stories, DNA interaction scene
Swift Student Challenge winner screen
Swift Student Challenge Winner 2024

An interactive SwiftUI experience about women in science and technology: illustrated scenes, story cards opening in place, and content served over a REST API. Selected as one of 350 winners worldwide.

Role
Design and engineering, solo
Platform
iPadOS, SwiftUI
Doppelgänger Box, AR puzzle box in a living room
Doppelgänger Box, title screen
Doppelgänger Box, narrative scene
Doppelgänger Box, puzzle scene

Augmented reality, single player

Immersive storytelling, puzzle solving and spatial interaction: the story object is anchored in the player's own room with ARKit and RealityKit, while Swift Concurrency keeps the interaction responsive.

Challenge
Make the room part of the puzzle
Stack
ARKit, RealityKit, Swift Concurrency

Fashion-tech

Personalized clothing recommendations generated from body type, style preferences and weather conditions.

The interesting part is not the catalogue, it is the decision: three inputs, one outfit, and a design system that keeps every recommendation card consistent as the product grows.

Pattern
MVVM
Backend
Firebase
Interface
Custom design system
Aions, 1940s living room scene
Aions, typewriter puzzle
Aions, future timeline scene
Aions, sound cue screen

Narrative puzzle game

An interactive narrative puzzle game where investigation, time travel and timeline disruptions shape the player's journey, and scenes, props and sound cues all carry evidence.

Engine
SpriteKit scenes over UIKit
Design
Illustrated eras, one timeline
Be Cool, goal screen
Be Cool, goal checklist
Be Cool, start screen
Be Cool, reflections screen
Be Cool, inspire screen

Well-being

An iOS well-being experience designed around personal goals, reflection and everyday routines, with handwritten input and personalized journaling persisted in Core Data.

Stack
UIKit, Core Data
Skin Diary, name question
Skin Diary, profile questions
Skin Diary, skin type question
Skin Diary, routine screen
Skin Diary, profile screen

Skincare

Routine building, product tracking and skin progress over time. Onboarding asks only what changes the routine, and the whole interface runs on its own SwiftUI design system.

Stack
SwiftUI, MVVM, Design System

watchOS

Sleep routines and personalized interactions on Apple Watch.

A companion app built for the wrist: short interactions, HealthKit data and REST APIs, designed for a glance before bed and a glance after waking up.

Platform
watchOS
Data
HealthKit, REST APIs
Mirelle Sine working on a MacBook
3+ years shipping iOS in production
Apple Developer Academy Computer Science

About me

Where architecture meets interface craft

I work across the whole surface of an iOS product, from architecture decisions and design system foundations to the last few points of spacing. Three years in production taught me that the interesting problems live where engineering constraints meet interface craft.

Server-driven layouts. Migrations that cannot break the app for five million people. Components other engineers will build on for years. And, outside work, my own products across augmented reality, games and well-being.

ProductScope and trade-offs
DesignSystems and detail
EngineeringSwift end to end
ArchitectureModular and testable
Expertise

The Apple ecosystem, end to end

  • Swift
  • SwiftUI
  • UIKit
  • Design Systems
  • Server-Driven UI
  • Clean Architecture
  • MVVM
  • VIP
  • Swift Concurrency
  • REST APIs
  • ARKit
  • RealityKit
  • Core Data
  • Core ML
  • HealthKit
  • SpriteKit
  • XCTest
  • XCUITest
  • CI/CD
  • SwiftLint
  • Design Systems
  • Server-Driven UI
  • Clean Architecture
  • MVVM
  • VIP
  • REST APIs
  • Swift Concurrency

A design system migrated from UIKit to SwiftUI, and the core components of a server-driven architecture, both in a product used by five million people.

  • iOS
  • iPadOS
  • watchOS
  • visionOS
  • ARKit
  • RealityKit
  • Core Data
  • Core ML
  • HealthKit
  • SpriteKit

Spatial interaction in Doppelgänger Box, a watchOS companion in Shleep, SpriteKit scenes in Aions, Core Data in Be Cool.

  • XCTest
  • XCUITest
  • CI/CD
  • GitLab CI
  • Jenkins
  • SwiftLint
  • Git
  • Agile

Unit and UI tests, linting and pipelines: what keeps a banking app shippable every sprint.