Adam Horacek

AI Engineer | Senior Apple Platform Engineer

AI Agents & LLM Applications | Developer Tooling | Python, TypeScript, Swift

+420 775 622 608 | [email protected]
adamhoracek.com | GitHub | LinkedIn | PDF

Summary

Software engineer with 15+ years delivering Apple-platform products, including security-sensitive banking applications. Now building AI agents and developer tooling in Python and TypeScript for long-running tasks, code review and retrieval-backed requirements synthesis. Combine hands-on AI work with production experience in architecture, concurrency, security and CI/CD.

Professional experience

Independent Contractor

Senior / Lead Software Engineer

Contract • Remote • 07/2023–Present

Apple-platform client delivery alongside applied AI tooling for my own engineering work.

Applied AI tooling (personal development):

• Agentic Review (TypeScript, XState, Codex SDK): built a PR review runner using GitHub/Jira context, CodeRabbit findings and Codex verification. Added resumable state, schema validation, revision checks and human approval before GitHub writes, with deterministic failure-path tests.
• Relay (Python, Codex): built long-running planner/executor/reviewer workflows with persistent handoffs and recovery. Added a Python guard to validate state and revision-bound review evidence.
• Retrieval and LLM integrations: created reusable skills that synthesize Figma, Jira and Slack information into source-grounded technical specifications; prototyped integrations with OpenAI Agents SDK and Model Context Protocol (MCP).

Client delivery and engineering practice:

• Integrated Codex and Claude into implementation, refactoring, documentation and review workflows, using repository instructions, reproducible commands and build/test verification.
• Delivered Swift 6 migrations, resolving actor isolation, Sendable and data-race issues; introduced DTO boundaries and integrated Kotlin Multiplatform shared modules into iOS.
• Modernized SwiftUI with Observation and built Swift Charts/Metal visualizations; strengthened unit, integration, snapshot and UI tests in CI.

Deutsche Bank

Lead iOS Engineer

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

• Led development of greenfield, white-label banking and signing applications, designing modular Clean Architecture with Coordinators and RxSwift for multiple brands.
• Owned authentication, session lifecycle and transaction verification flows; contributed security hardening and defensive coding in a regulated delivery environment.
• Automated brand-specific builds, environment configuration and release pipelines with Swift Package Manager, feature gating and secure secrets injection.
• Mentored engineers through architecture guidance and code review within regulated SDLC and SAFe delivery processes.

Shipped apps: Deutsche Bank, Postbank, FYRST, Postbank BestSign.

Earlier Experience

Deutsche Bank | Senior iOS Developer

Contract • Frankfurt am Main, Germany • 02/2018–03/2019

Built enterprise iPad apps for branch advisors; collaborated with Apple's Enterprise Design Labs. Resolved data races, replaced brittle binary dependencies and improved testing and build workflows.

VEON | Senior iOS Developer

Contract • Amsterdam, Netherlands • 12/2017–01/2018

Modernized a messaging/VoIP application, migrating Objective-C components to Swift and refactoring toward VIPER and SOLID to improve maintainability.

Sapient Nitro | Senior iOS Developer

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

Delivered iPad features and iPhone UI/UX improvements for the European Tour app, collaborating with an offshore team and raising quality through code review.

Aegon | Senior iOS Developer

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

Re-architected UI layers with MVC/MVVM and implemented client-side JWT/SSO authentication. Contributed cryptographic improvements and defensive coding in a regulated environment.

Qredo | Senior iOS Developer

London, UK • 10/2015–12/2015

Consolidated an Objective-C/Swift SDK, fixed hundreds of failing tests, optimized multithreading and message queues, and strengthened secure communications with the Security framework.

Farm At Hand | Senior iOS Developer

Vancouver, Canada • 02/2014–07/2014

Built a farm-management iOS app with offline multi-user synchronization. Contributed to API design, DevOps and hiring.

Technical Skills

• AI engineering: OpenAI Agents SDK, Codex SDK, MCP, tool calling, prompt/context engineering; API- and connector-based retrieval-augmented generation (RAG); Codex and Claude workflows.
• Agent reliability: XState, persistent state, schema validation, recovery, human-in-the-loop approval, revision-aware verification, prompt-injection-aware handling of external context.
• Languages and data: Python, TypeScript/JavaScript, Swift, Objective-C, C/C++, Bash; NumPy, Polars, PyArrow. Personal Python work includes data acquisition, validation and reproducible market-data reports.
• Apple platforms: iOS, iPadOS, macOS, tvOS; SwiftUI, UIKit, AppKit, Core Data/SwiftData, Combine/RxSwift, Swift concurrency, Swift Charts, Metal and Swift-NIO.
• Quality and delivery: pytest, Vitest, Swift Testing, XCTest; unit, integration, snapshot and UI tests; Git, GitHub/GitLab, CI/CD, secure configuration and modular architecture.
• Local AI / ML exploration: Ollama and on-device model experiments; Core ML, ML Kit and TensorFlow 2 fundamentals.

Education & Training

University studies: Masaryk University, Parallel and Distributed Systems (2010–2011); Charles University, General Computer Science (2007–2009).

Claude Code in Action, Anthropic; Getting started with TensorFlow 2, Imperial College London.

Languages: Czech: native | English: C2 | Slovak: C2 | German: B1