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~/seif-kobrosly$whoami

Seif Kobrosly

Senior iOS EngineerWest Palm Beach, FLAvailable for work

Senior iOS Engineer with 10+ years building and scaling high-performance mobile applications for millions of users. Clients include the NBA, CDC, U.S. Naval Research Laboratory, CareCredit, and U.S. State Department. Specialized in Swift concurrency, modular architecture, and modernizing legacy codebases — also builds full-stack Python/FastAPI backends to support mobile platforms.

10M+
Users served
NBA · CareCredit · CDC apps
10+
Years experience
Swift · SwiftUI · UIKit
5+
Federal clients
CDC · NRL · State Dept
5+
Languages
Swift · Python · ObjC · JS
GitHubLinkedIn

Experience

Senior iOS Developer

05/2026 – Present

Publix Super Markets — Contract · Remote

SwiftSwiftUIUIKitMVVMasync/await
  • ◆Contracted as a Senior iOS Developer, contributing to mobile initiatives at one of the largest employee-owned supermarket chains in the U.S.

Founder

07/2018 – Present

Apptitude Labs — West Palm Beach, FL

SwiftSwiftUIFastAPIPythonPostgreSQLBLECore Data
  • ◆Leverages Claude Code as a core part of the development workflow for rapid prototyping, code review, and architectural decision-making across client engagements

Centers for Disease Control and Prevention — Contract

  • ◆Developing the public-facing STI Tx Guide iOS app, improving accessibility, usability, and clarity for clinicians and public health professionals
  • ◆Modernized legacy codebase, implementing Swift best practices, modular architecture, and improved maintainability
  • ◆Delivered UI/UX enhancements to streamline navigation, reduce cognitive load, and align the app with CDC design standards
  • ◆Collaborated with medical experts, product teams, and QA to ensure clinical accuracy and regulatory compliance
  • ◆Implemented secure data handling and local Core Data storage for offline access, aligned with federal privacy requirements
  • ◆Led transition toward scalable, testable code, improving the velocity of future updates and long-term sustainability

U.S. Naval Research Laboratory — Contract

  • ◆OTTAR Mobile App: Led development of a native iOS app enabling soldiers to capture and annotate munition images; integrated Swift async/await for performant asynchronous operations
  • ◆Designed FastAPI/PostgreSQL backend for secure, scalable storage of images, metadata, and ML-based identification results
  • ◆NeMo Mobile App: Developed a cloud-based iOS platform for observational data capture within aviation safety programs (LOSA)

Deed Ring

  • ◆Developed a BLE-enabled iOS app for the QB708/QB806 Tasbeeh devices, enabling real-time tracking and syncing of user inputs from hardware to app
  • ◆Implemented Bluetooth connectivity and communication protocols, handling device pairing, data streaming, and edge cases for reliable operation

Senior iOS Engineer

01/2024 – 11/2025

National Basketball Association — Contract · Remote

SwiftSwiftUIasync/awaitMVVMURLSessionAdobe AnalyticsAmplitude
  • ◆Architected scalable iOS systems using Swift, SwiftUI, and async/await for millions of users; implemented modern concurrency patterns improving app stability and developer velocity
  • ◆Redesigned Games feature with MVVM architecture using SwiftUI, reducing code complexity by 40% and enabling faster feature development while maintaining backward compatibility
  • ◆Built GamesLibrary, a modular Swift Package standardizing REST networking and API response handling across teams
  • ◆Refactored Apple Watch syncing via WatchSessionBridge, a reactive Swift Package using Combine and WCSession for automatic real-time preference updates with offline support
  • ◆Improved WebView load times by 30% through advanced HTTP caching and optimized URLSession configuration
  • ◆Refactored analytics integration across five providers including Adobe Analytics, Amplitude, and Kochava
  • ◆Integrated complex entitlement checks — TV provider authentication, League Pass, Amazon Prime Video, and regional blackout enforcement

Lead iOS Engineer

10/2022 – 01/2024

Method — Remote

SwiftUIObservationLive ActivitiesSwift Package Managerasync/awaitApple Pay
  • ◆Developed a reusable SwiftUI component library to accelerate delivery of future iOS apps
  • ◆Built modular frameworks and proof-of-concept features to modernize internal architecture
  • ◆Evaluated new Apple frameworks (SwiftUI, Observation, Live Activities) for potential adoption

CareCredit

  • ◆Delivered features for an app serving over 1M users, improving usability, performance, and scalability
  • ◆Spearheaded a full app re-architecture introducing Apple Pay for seamless transactions and leading a coordinator refactor that migrated complex UIKit flows to SwiftUI
  • ◆Modernized the network layer with async/await, a custom retry mechanism, and improved error handling — increasing reliability and reducing failure surface
  • ◆Enhanced app structure through dependency injection, improving code reusability and reducing coupling across modules
  • ◆Improved the push notification system for timely delivery and better user targeting, integrating it cleanly into the overall app architecture

Senior iOS Engineer

02/2021 – 09/2022

Mobomo — McLean, VA

SwiftCore DataCI/CDOffline SyncUIKit
  • ◆Embedded as Mobile Lead Architect with the U.S. State Department, driving mobile development initiatives and ensuring successful delivery
  • ◆Spearheaded CI/CD automation, modernizing mobile development processes and establishing reliable, error-free deployment workflows
  • ◆Collaborated with the CDC to develop a native iOS app supporting real-time data updates, offline storage, and concurrent functionality for a seamless field experience
  • ◆Successfully launched the CDC STI Guidelines iOS app on the App Store, maintaining high standards for performance, data integrity, and user satisfaction

iOS Engineer

02/2015 – 02/2021

PRA Health Sciences — San Diego, CA (Remote)

Objective-CSwiftC#SDK DevelopmentSalesforce
  • ◆Joined as the sole offsite engineer at Parallel 6, building the foundation before PRA Health Sciences acquired the company in 2017
  • ◆Delivered multiple production apps for Sanofi, DHS, Pfizer, and San Diego Gas & Electric on the CaptiveReach (now Clinical6) platform
  • ◆Built a Salesforce-connected iOS tool for internal clinical researchers, significantly improving collaboration and team productivity
  • ◆Maintained and enhanced the CaptiveReach/Clinical6 SDK across Objective-C, Swift, and C# platforms
  • ◆Mentored engineers and led App Store submission processes across multiple client releases

Senior Consultant

11/2013 – 01/2015

Booz Allen Hamilton — McLean, VA

iOSObjective-CiPadGoogle Glass
  • ◆Worked within the Strategic Innovation Group (SIG), driving mobile solutions with lasting organizational impact
  • ◆Developed an iOS prototype for the Defense Suicide Prevention Office (DSPO) that directly secured a significant government contract
  • ◆Built a marketing iPad app showcasing the SIG group's capabilities and innovations to stakeholders and leadership
  • ◆Led development of MemJog, a Google Glass app designed to assist individuals with Alzheimer's disease
  • ◆First-place finish at a Department of Energy hackathon

Skills

iOS & Apple

SwiftSwiftUIUIKitCombineasync/awaitCore DataWatchKitObjective-CApp ExtensionsLive Activities

Architecture

MVVMClean ArchitectureTCASwift Package ManagerModular FrameworksDependency Injection

Backend

PythonFastAPIPostgreSQLRESTGraphQLWebSocketsDocker

Networking

URLSessionHTTP CachingAlamofireOAuthBLE / CoreBluetooth

Analytics & Payments

Adobe AnalyticsAmplitudeKochavaFirebaseApple PayStoreKit

Tooling

XcodeGitCI/CDTuistFigmaClaude Code

Education

B.Sc Information Technology / Applied Computer Science

May 2012

George Mason University — Fairfax, VA

Projects

iOS App

Athany

A beautifully designed Islamic prayer companion. Accurate location-based prayer times, system-level alarms that work on silent, Live Activity countdowns, Qibla compass, home screen widgets, and Ramadan reminders.

SwiftSwiftUIWidgetKitLive ActivitiesiOS 17+
App Store
iOS App

Deed Ring

Companion app for the Deed smart ring — a wearable tasbeeh counter for Islamic dhikr practice. Connects via Bluetooth to track and sync counts from the hardware device, with prayer reminder notifications.

SwiftSwiftUICoreBluetoothBLEiOS 17+
App Store
Open Source

XZap

A disk cleanup utility for macOS developers. Manages Xcode simulators, runtimes, DerivedData, and build caches through an interactive terminal UI. Supports dry-run mode, storage tracking, and Apple Silicon.

GoTUImacOSCLIDeveloper Tools
GitHub

Writing

Technical Article

How I Set Up a Network-Wide Ad Blocker on My Raspberry Pi (With IPv6, Unbound, and Docker)

A complete guide to running Pi-hole + Unbound on a Docker macvlan network — no port conflicts, no NAT, real IPs for your containers.

DockerNetworkingRaspberry PiDNSIPv6Linux
Read on MediumGitHub