Adam Horacek

Senior / Lead iOS / macOS Engineer

Swift 6 • SwiftUI • Structured Concurrency • AI Native Developer

• Tel: +420 775 622 608
• E-mail: adam.horacek@me.com
• GitHub: https://github.com/adamhoracek
• LinkedIn: https://linkedin.com/in/adamhoracek

Summary

Senior iOS/macOS engineer with 15+ years building and shipping Apple‑platform software. Strong in modern Swift (Swift 6 / strict concurrency), SwiftUI and architecture. Comfortable owning delivery end‑to‑end: architecture, implementation, CI, debugging, and production releases. Systems thinker with a pattern‑first cognitive style—often processing information differently—which helps build end‑to‑end mental models quickly, spot hidden coupling and failure modes early, and design for real operational constraints.

Professional experience

Independent Contractor

Senior/Lead iOS/macOS Engineer

Contract • Remote • 07/2023–Present

Freelance/contract engineering across Apple‑platform codebases (NDA).

• Contract delivery across iOS/macOS/tvOS codebases
• Swift 6 migration: resolved Sendable fallout, actor‑isolation refactors and race conditions
• Introduced DTO boundaries to decouple UI/domain layers
• Integrated Kotlin Multiplatform (KMP) shared modules into an iOS app
• Modernized SwiftUI stack using Observation and a VM‑less MV (Model–View) approach
• Implemented Swift Charts (with Metal overlays)
• Strengthened unit, integration, snapshot, UI tests tests and wired into CI

Deutsche Bank

Lead iOS Engineer

Contract • Remote • Frankfurt am Main, Germany • 09/2020–06/2023

Greenfield, modular, white‑label mobile banking + signing iOS applications.

• Designed and implemented a modular Clean Architecture with Coordinators
• Owned critical user flows: authentication/session lifecycle and transaction verifications
• Implemented SwiftPM-level build customization (custom code exclusion/feature gating + secure config/secrets injection at build time)
• Built CI / environment configuration patterns: secure secrets handling, env‑specific configuration, and safe release pipelines
• Drove security hardening work (threat‑model mindset, defensive coding)
• Mentored engineers via code reviews and architecture guidance
• Worked in regulated delivery environments (CI, SDLC, SAFe)

Apps shipped / contributed to

• Deutsche Bank — https://apps.apple.com/us/app/deutsche-bank/id1040475847
• Postbank — https://apps.apple.com/us/app/postbank/id6444706327
• FYRST — https://apps.apple.com/us/app/fyrst/id6447359205
• Postbank BestSign — https://apps.apple.com/us/app/postbank-bestsign/id1442251022

Deutsche Bank

Senior iOS Developer

Contract • On‑site/Remote • Frankfurt am Main, Germany • 02/2018–03/2019

Enterprise iPad applications (internal distribution; used by advisors in branches).

• Built features using Clean Swift (VIP) architecture
• Collaborated with Apple’s Enterprise Design Labs
• Diagnosed and resolved concurrency/data race issues to improve stability and performance
• Improved developer experience: deprecated brittle binary dependencies, introduced Workspaces, and reduced build friction across teams
• Strengthened testing culture (unit/UI tests) and high‑signal code reviews

VEON

Senior iOS Developer

Contract • On-site • Amsterdam, Netherlands • 12/2017–01/2018

• Modernized a high‑traffic messaging/VoIP app by migrating Objective‑C components to Swift
• Refactored toward VIPER + SOLID to improve maintainability and long‑term velocity

Sapient Nitro

Senior iOS Developer

Contract • London, UK / New Delhi, India • 04/2017–06/2017

• Delivered UI/UX improvements and new iPad features; improved iPhone app quality in collaboration with an offshore team
• Raised engineering standards via code reviews and pragmatic best practices

Apps shipped / contributed to

• European Tour — https://apps.apple.com/us/app/european-tour/id573521629

Aegon

Senior iOS Developer

Contract • On-site • The Hague, Netherlands • 11/2016–02/2017

• Re‑architected UI layers (MVC/MVVM) and implemented client‑side auth (JWT/SSO)
• Strengthened security posture through crypto‑oriented improvements and defensive coding

Qredo

Senior iOS Developer

On-site • London, UK • 10/2015–12/2015

• Consolidated Objective‑C/Swift iOS SDK
• Improved stability by fixing hundreds of failing tests
• Optimized multi‑threading/message queues and strengthened secure communications (binary protocols, Security framework)

Farm At Hand

Senior iOS Developer

On-site • Vancouver, Canada • 02/2014–07/2014

• Built a farm management iOS app (offline multi‑user support & synchronization)
• Contributed to API design, DevOps, and hiring process

Apps shipped / contributed to

• Farm At Hand — https://apps.apple.com/us/app/farm-at-hand/id1089000986

Core strengths

• Swift 6 & concurrency correctness: async/await, actors, Sendable, strict concurrency checks, TaskGroups, cancellation; race condition debugging
• SwiftUI stack: SwiftUI, Observation (@Observable), SwiftData; UIKit/AppKit interoperability
• Charts & visualization: Swift Charts, custom rendering where needed; performance tuning (Instruments, signposts), Metal when beneficial
• Synchronization: Synchronization framework (Mutex) for safe shared state where actors aren’t the right trade‑off
• Architecture: MVVM(+C) + Coordinator, Clean Architecture, Clean Swift (VIP), VIPER, MV (Model–View) SwiftUI (view‑model‑less / Observation‑driven)
• Systems thinking (pattern‑first cognitive style): tends to process information differently, surfacing hidden coupling, edge cases, and second‑order effects early; translates that into pragmatic architecture and clean interfaces.
• Quality & delivery: Swift Testing / XCTest, UI tests, snapshot tests, integration tests, CI/CD, code review, SDLC/SAFe environments
• Security mindset: auth/session design, secure config handling, reverse‑engineering awareness

AI‑assisted development (privacy‑first)

• CLI‑first workflow (no IDE plugins): Claude + Codex CLI, guided by repo‑local rules and .md instruction files
• Uses privacy/safety settings (no training on client data where supported) and follows client policies
• Never paste secrets; prefer redaction/minimal snippets; output remains tested and reviewed before integration

Skills

• Languages: Swift, Objective‑C, C/C++, Python, JavaScript, Bash
• Platforms: iOS, iPadOS, macOS, tvOS
• UI: SwiftUI, UIKit, AppKit
• Modern Swift: Swift 6, Structured Concurrency (async/await, actors, Sendable), Synchronization (Mutex), GCD (legacy/interop)
• Frameworks: Observation, Swift Charts, SwiftData, Core Data, Combine/RxSwift (interop), Swift‑NIO (when applicable), Metal
• Testing: Swift Testing, XCTest, UI Testing, snapshot tests, integration tests
• Architecture: MVVM(+C) + Coordinator, Clean Architecture, Clean Swift (VIP), VIPER, MV (Model–View) SwiftUI (view‑model‑less / Observation‑driven)
• Tooling: Xcode, Instruments, Swift Package Manager, Git, Charles Proxy, Wireshark, Figma
• CI/DevOps: GitHub/GitLab, CI pipelines, secure environment config

Selected projects (personal / R&D)

Quantitative Trading (Personal Project)

macOS trading workstation focused on high‑performance visualization and backtesting.

• Real‑time chart rendering, indicators, and backtesting engine
• Broker API integrations (architecture‑ready for multiple providers)
• Tech: Swift, SwiftUI, AppKit, SwiftData, Swift Concurrency, Metal, Swift Charts

BitTorrent + DHT (Personal Project)

Custom BitTorrent client with a DHT implementation for decentralized peer discovery.

• Tech: Swift, Swift‑NIO, networking protocols, distributed systems concepts

Education

• Masaryk University — Czechia (Parallel and Distributed Systems) — 2010–2011
• Charles University — Czechia (General Computer Science) — 2007–2009

Courses

• Getting started with TensorFlow 2, Imperial College London — https://www.coursera.org/account/accomplishments/verify/2SNBXJ9KDZBM

Languages

• English — C2
• Czech / Slovak — C2
• German — B1