Core stack14+ years of iOSAI on iOS

Core stack.

From Objective-C in 2012 to Swift 6 and AI today. The tools I use to build, test and ship apps.

  • Swift
  • SwiftUI
  • SwiftData
  • Combine
  • Objective-C

01 AI in my stack

I’ve shipped AI in production for companies, I use it in my own apps, and I build every app with AI agents.

On-device ML

Models that run on the phone: medical image recognition, photo restoration, face detection and photo analysis.

  • Core ML
  • Vision
  • Create ML
  • Model evaluation
Used in

Generative AI

Photorealistic AI avatars generated through an API, and virtual try-on of real fashion, in an app with 100K+ downloads.

  • AI avatar APIs
  • Virtual try-on
  • Image generation
Used in

AI-assisted engineering

AI agents in my daily workflow, with project rules in every repo and custom skills that automate releases, ASO and Apple Ads.

  • Cursor
  • Claude Code
  • Agent rules
  • Custom agent skills
  • Xcode MCP
Used in

02 Apple frameworks in my apps

What powers the six apps I build and ship under skylarks.io, and where each framework is used.

Core ML, Vision & Create ML

On-device models for photo restoration, face detection and finding similar photos. Nothing leaves the device.

Used in

SwiftUI & Observation

Every screen across iPhone, iPad, Mac and Apple Watch, with state built on the Observation framework.

Used in

Swift 6 concurrency

Strict concurrency checking with async/await and actors, keeping heavy work off the main thread.

Used in

Core Image, ImageIO & AVFoundation

Image and video pipelines with full-resolution export, frame-accurate video editing and untouched audio.

Used in

PhotoKit

Reading and saving to the photo library safely, with nothing changed until the user decides.

Used in

StoreKit 2 & RevenueCat

Subscriptions, lifetime unlocks and one-time purchases with honest, clear paywalls.

Used in

HealthKit, WatchKit & WatchConnectivity

A standalone Apple Watch workout timer with haptics and heart rate, synced with iPhone and saved to Health.

Used in

WidgetKit, ActivityKit & App Intents

Live Activities in the Dynamic Island, Lock Screen widgets, Control Center and Siri shortcuts.

Used in

GameKit & Core Haptics

Turn-based Game Center duels and custom haptic patterns tuned to every move.

Used in

MapKit & Core Location

Photos grouped into places and trips on a map in VOID, and ride navigation in the Harley-Davidson app.

Used in

User Notifications

Timed reminders for every step of a bake plan and daily workout nudges.

Used in

AppKit & Mac

Native Mac versions alongside iPhone and iPad.

Used in

03 Stack behind professional products

What I built with at companies, from GenAI and medical machine learning to motorcycles and drones. See the products

Doji

Founding iOS Engineer · 2024–2025

First commit to App Store in 6 months: AI avatars generated through an API, virtual try-on and shopping. 100K+ downloads.

  • GenAI avatar APIs
  • Virtual try-on
  • Shopping
  • iOS from zero

Orthogonal

Tech Lead · 2023–2026

Two medical apps: on-device ML that recognizes throat conditions from the camera, and the SPRINT PNS nerve stimulation app connected over Bluetooth.

  • On-device ML
  • Image recognition
  • Bluetooth LE
  • Security
  • Regulated software

Harley-Davidson

Senior iOS Engineer · 2020–2023

Bluetooth connectivity with the motorcycle, navigation and tests in the official app, rated 4.8★ by 39K+ riders.

  • Bluetooth
  • MapKit
  • HERE Maps SDK
  • Testing

SkyeBrowse

Mobile Lead · 2019–2023

The DJI and Autel flight app that captures aerial video for 3D mapping, used by 1,200+ agencies including the NTSB.

  • DJI SDK
  • Autel SDK
  • Aerial video
  • Architecture
  • Gigster2016–2020ScalabilitySecurityLive translation for GlaxoSmithKlineCanon · GlaxoSmithKline · NikeNASDAQ · Prudential · Bobbi Brown
  • Swish Labs2017–2019Team leadCode qualityFintech
  • skylarks.io agency2016–2019Backend to appClient projects
  • NaviExpert2014–2017OpenGLNetworkingNavigation

04 How I ship

The pipeline behind my own apps, from the first build to growth after launch.

01

Build

  • Xcode & Swift 6
  • XcodeGen projects
  • Swift Package Manager
  • AI agents: Cursor & Claude Code
02

Test

  • Swift Testing
  • XCTest & UI tests
  • SwiftLint
  • Automated screenshots
03

Ship

  • fastlane
  • TestFlight
  • App Store Connect API
  • GitHub Actions
04

Grow

  • RevenueCat
  • Mixpanel
  • Apple Search Ads
  • AdMob with consent

05 Across my career

AI in production

  • On-device ML
  • Image recognition
  • AI avatar APIs
  • Virtual try-on

Architecture & SDKs

  • MVVM
  • Coordinators
  • RxSwift
  • RxCocoa
  • Core Bluetooth
  • Core Data
  • Realm
  • Alamofire
  • PromiseKit
  • SnapKit
  • Cartography
  • Charts
  • MapBox
  • HERE Maps
  • DJI SDK
  • Autel SDK

Quality & CI/CD

  • KIF
  • Nimble
  • SwiftLint
  • Fastlane
  • GitHub Actions
  • Bitrise
  • Jenkins
  • CircleCI
  • Codeship

Languages & frameworks

  • C
  • C#
  • Kotlin
  • Java
  • Dart
  • Python
  • React Native
  • JSON
  • XML

Tooling

  • Xcode
  • Claude Code
  • Cursor
  • Git
  • SPM
  • CocoaPods
  • Carthage
  • SwiftGen
  • Flutter
  • Xamarin
  • Visual Studio
  • WebStorm
  • Figma
  • Final Cut Pro

Product & analytics

  • Jira
  • Linear
  • Pivotal Tracker
  • Firebase
  • Crashlytics
  • App Center
  • Google Analytics

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