Hire me

Apps used by millions

I build and ship features in apps with up to 2 million daily users, and roll them out safely with feature flags and A/B tests. In one of them I owned the whole A/B testing setup.

Half the crashes

I track down production crashes: threading, memory, broken UI. In an app with millions of users I cut crashes in half, from a 99.2% to a 99.6% crash‑free rate.

Leading

As a lead I shaped the technical plan with product and backend, reviewed 300+ pull requests, took part in 25+ technical interviews and onboarded new engineers.

Legacy code to modern Swift

I led the move of five core modules from Objective‑C to Swift and a cleaner architecture, and regressions went down, not up.

Payments and accessibility

Secure card payments with 3‑D Secure, built together with backend teams, and key flows that meet WCAG 2.1 AA, so the app works for people who use VoiceOver.

AI in daily work

I use Claude Code, Codex and Cursor every day in production: crash‑log triage, tests, refactors. My own app, Flopline, is built this way end to end.

Flopline

Flopline is a fast, precise poker equity calculator for studying hands and reviewing spots. Designed, built and shipped by me, with Claude Code as the engineering team.

Languages and UI

Swift, Objective‑C, SwiftUI, UIKit; Kotlin Multiplatform, Compose Multiplatform and React Native when a project needs them

Architecture

TCA, MVVM, MVP, Clean Architecture, Coordinator, modular apps

Concurrency

async/await, actors, Swift 6 strict concurrency, Combine, RxSwift, GCD

Data and networking

URLSession, REST, GraphQL, Codable, Core Data, SwiftData

Dependencies and projects

SPM, Tuist, XcodeGen, CocoaPods, Carthage

Testing

XCTest, XCUITest, Swift Testing, snapshot tests, Quick/Nimble, StoreKit testing, TDD

Performance and crashes

Instruments (Time Profiler, Allocations, Leaks), memory graph, Xcode Organizer, Crashlytics

Delivery

Fastlane, GitHub Actions, Bitrise, GitLab CI, Jenkins, SonarQube, TestFlight, App Store Connect API, phased releases

Payments

StoreKit 2, in‑app purchases, Google Play Billing, Apple Pay, 3‑D Secure

Experiments and analytics

Feature flags, A/B tests, Firebase Analytics, Remote Config

Security

Keychain, end‑to‑end encryption (Signal Protocol), certificate pinning

Platform

Push notifications, deep and universal links, WidgetKit, localisation (6 languages), accessibility (VoiceOver, Dynamic Type)

AI and ML

Core ML, Vision, LLM APIs (Anthropic, OpenAI), MCP; Claude Code, Codex, Cursor

Education

BSc in Mathematics and Computer Science

Write a few lines about your project: what you're building, the scope and the budget. I'll reply with my availability.
hire@haurylovich.com