Robert Gacsi

· Designed and implemented a native iOS SDK for a BLE-based IoT safety device, written in Swift with a strong focus on clear public APIs and long-term maintainability.

· Worked as the sole iOS engineer, owning the full development lifecycle from SDK architecture and core abstractions to implementation and delivery.

· Implemented Bluetooth Low Energy communication, background execution, and asynchronous event handling using modern iOS concurrency patterns.

· Integrated networking and device state reporting with an emphasis on robustness, fault tolerance, and predictable behavior in safety-critical scenarios.

· Delivered under strict deadlines, balancing architectural clarity with pragmatic decisions to ensure timely and reliable integration into client applications.

· Developed and maintained features for the official Premier League iOS application, built using Swift and modern iOS frameworks, and used by millions of users during live matches.

· Worked in a large iOS team (10+ engineers), contributing to a shared codebase with established architectural patterns (TCA, MVVM) and reactive data flows.

· Built complex UI flows using UIKit and SwiftUI, collaborating closely with designers to deliver pixel-perfect interfaces under tight, event-driven deadlines.

· Applied reactive and asynchronous patterns (Combine / RxSwift, async/await where applicable) to handle live data updates and high-frequency state changes.

· Focused on performance optimization, memory management, and crash reduction during peak traffic and high user concurrency.

· Contributed to the development of a security-critical native iOS application for one of Switzerland’s leading wealth management institutions.

· Worked with a modern Swift codebase, applying MVVM-based architecture and asynchronous programming patterns to ensure predictable and testable behavior.

· Implemented and integrated multi-layer authentication and authorization flows, focusing on secure client-side handling and reliable communication with backend services.

· Collaborated closely with backend engineers and QA in an environment with strict audit and validation requirements, where even small changes required careful coordination.

· Paid particular attention to correctness, edge cases, and regression prevention, balancing development speed with the high cost of errors in a regulated financial context.