Kirlos Yousef

B.S. Computer Science

2017 – 2020

University of Debrecen • Debrecen, Hungary

• Graduated with the highest GPA in the class with a fully funded scholarship

RaceMe

Competitive social running app (iOS/watchOS)
Available on the App Store

• Built a hybrid real-time multiplayer engine using Firestore and BrainCloud RTT for low-latency race synchronization
• Developed a fault-tolerant background location service that handled OS suspension during locked-screen tracking
• Implemented bidirectional WatchConnectivity to sync high-frequency telemetry between iOS and watchOS
• Shipped Live Activities and Dynamic Island integrations for real-time race progress

Revera AI

Intelligent voice recorder & AI transcriber (iOS/iPadOS)
Available on the App Store

• Architected a fault-tolerant transcription engine using SFSpeech and Whisper with offline failover
• Reduced upload usage by ~80% by downsampling audio from 44.1kHz stereo to 16kHz mono in real time
• Built SwiftData persistence that handled interruptions, recovery, and disk space monitoring

Amour

A Space fo Couples
Available on the App Store

• Engineered a thread-safe, dual-layer image caching system (Memory + Disk) with strict cost limits (50MB), eliminating Out-Of-Memory crashes during infinite scroll sessions
• Optimized data fetching by implementing custom PostgreSQL RPCs (Remote Procedure Calls) to handle heavy filtering (blocking/pagination) on the server, reducing client-side payload size by ~40%.
• Built a universal routing system handling Deep Links and Push Notifications, ensuring consistent navigation state across cold launches and background operational modes

iOS Tech Lead

02/2025 – Present

Sellou – Consumer App Studio & AI Incubator — Utah, United States (Remote)

• Spearheaded iOS strategy across multiple apps and built CI/CD pipelines that cut release cycle time by 50%
• Architected and launched Spookling (an OpenClaw AI agent app) using a modular SPM architecture
• Engineered real-time AI chat via Server-Sent Events and bridged LLM tool-calling payloads to native iOS EventKit, enabling the assistant to manage calendars and reminders
• Built Plot My Calories from 0 to 1 using OpenAI Vision and Swift Actors, offloading processing to maintain 60fps
• Architected a V2 video engine for Sellou app with AVKit and HLS, reducing playback start time by 40% and bundle size by 20% through On-Demand Resources

iOS Team Lead

02/2024 – 02/2025

Iomob – B2B Mobility-as-a-Service Platform — Barcelona, Spain (Remote)

• Led 5 iOS engineers to ship 2 enterprise apps used by thousands, maintaining a crash-free rate above 99.9%
• Improved delivery velocity and reduced technical debt through automated CI and standardized code reviews
• Delivered the LNER app with Stripe tokenization for PCI-compliant payments, cutting checkout time to under 8 seconds and reducing trip-planning wait times by 35%
• Launched BrightBike with offline-first map clustering and local receipt generation for low-connectivity use cases

iOS Engineer

02/2021 – 02/2024

Iomob – B2B Mobility-as-a-Service Platform — Barcelona, Spain (Remote)

• Engineered the core iOS Mobility SDK used by Ford and Renfe, normalizing data from 10+ providers and reducing integration time from weeks to under 2 days
• Optimized a synchronization engine handling multiple provider streams while maintaining 60fps scroll performance
• Achieved 90%+ coverage on core SDK logic and zero critical crashes through comprehensive unit and UI testing