Khachatur HakobyanSenior iOS Engineer
Resume

Professional project · Software architecture

Tickster BoxPoint Mobile

XamlabiOS Team Lead (Senior iOS Engineer)Jan 2019 – Mar 2020Los Angeles, California, United States · On-site

Tickster BoxPoint Mobile is a native iOS ticket validation application enabling event organizers and venue staff to scan QR codes, validate tickets, and manage attendee check-ins.

  • Swift
  • Xamarin/C#
  • UIKit
  • iOS Software Architecture

My role and work

As an iOS Team Lead at Xamlab, I initially worked on the existing Xamarin/C# application, identifying architectural limitations and opportunities to improve maintainability, performance, and user experience. Subsequently, I led its migration to a new native Swift implementation, introducing a scalable, modular MVVM architecture with Protocol-Oriented Programming, SOLID principles, dependency injection using Swinject, and reactive programming with Bond.

Redesigned a fragmented three-screen validation workflow into a single, context-aware interface with automatic progression, incorporating real-time QR-code scanning through QRCodeReader.swift. The redesigned experience accelerated ticket validation by 5–6×, reduced validation errors by over 90%, and contributed to a reported 5.0 App Store rating.

Integrated Alamofire, PromisesSwift, and SwiftKeychainWrapper for networking, asynchronous operations, and secure credential storage. Structured the application into reusable and independently testable modules.

Established Azure DevOps CI/CD pipelines, standardized pull request reviews, and implemented automated unit and UI testing using Cuckoo, Nimble, and OHHTTPStubs, achieving approximately 98% test coverage.

Mentored junior engineers in clean architecture, modular development, automated testing, and code reviews, fostering stronger collaboration and engineering practices while delivering the redesigned application ahead of schedule.

Achievements and metrics

  • The redesigned experience accelerated ticket validation by 5–6×, reduced validation errors by over 90%, and contributed to a reported 5.0 App Store rating.
  • Established Azure DevOps CI/CD pipelines, standardized pull request reviews, and implemented automated unit and UI testing using Cuckoo, Nimble, and OHHTTPStubs, achieving approximately 98% test coverage.

Quoted from the description above; figures are self-reported.

Skills & Technologies 30

  • Swift
  • Xamarin/C#
  • UIKit
  • iOS Software Architecture
  • MVVM
  • SOLID Principles
  • Modular Architecture
  • Protocol-Oriented Programming
  • Dependency Injection
  • Reactive Programming
  • Unit Testing
  • UI Testing
  • Azure DevOps
  • CI/CD
  • Technical Leadership
  • QR Code Scanning
  • Swinject
  • Bond
  • Alamofire
  • PromisesSwift
  • QRCodeReader.swift
  • Cuckoo
  • Nimble
  • OHHTTPStubs
  • SwiftKeychainWrapper
  • SwiftEventBus
  • Code Refactoring
  • Legacy Code Modernization
  • Engineering Mentorship
  • Code Reviews

The first 15 are the primary skills for this project; the rest are additional.

Chronology

Project 1 of 1 at Xamlab (Jan 2019 – Mar 2020), listed newest first. Project-level dates are not given.