My name is Hissein Oumar

Senior Mobile App Developer
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About Me

Senior Mobile App Developer with 8+ years of hands‑on experience building and shipping native iOS (Swift, SwiftUI, UIKit) and Android (Kotlin, Java) applications from the ground up. Proven ability to single‑handedly develop and maintain complex multi‑app ecosystems, including customer and driver apps for on‑demand logistics, ride‑sharing platforms, B2B merchant solutions, e‑commerce marketplaces, and SaaS systems. Adept at leading end‑to‑end mobile development—from requirement gathering and UI/UX design (Figma, Adobe XD) to clean architecture (MVVM, VIPER), API integration, testing, and App Store/Google Play deployment. Passionate about writing scalable, maintainable code and delivering user‑centric, high‑performance mobile experiences.

Key values

📱 End-to-End Mobile Engineering

  • Cross-Platform Delivery: Architect, build, and deploy high-performance native applications for both iOS (Swift/SwiftUI) and Android (Kotlin) platforms.

  • Store Management: Manage the full release lifecycle, maintaining and updating mobile applications across the Apple App Store and Google Play Store.

  • Performance Optimization: Proactively identify and resolve runtime bottlenecks, memory leaks, and bugs to ensure maximum responsiveness and fluid UI performance.

🏛️ Architecture & Quality Assurance

  • Clean Code & Architecture: Maintain high standards of code quality, organization, and modularity using industry-standard architectural patterns (MVVM, VIPER).

  • Robust Testing: Write comprehensive unit and integration tests to minimize production breakdowns and ensure long-term codebase stability.

  • CI/CD & Automation: Contribute to the improvement of development workflows through automation, CI/CD pipelines, and robust version control (Git).

🤝 Collaboration & Agile Delivery

    • Cross-Functional Alignment: Partner closely with backend engineers to design efficient API contracts and collaborate with QA teams to streamline testing and delivery.

    • Product Refinement: Work within Agile/Scrum frameworks using Jira to define, design, and ship high-impact features from inception to launch.

    • UI/UX Craftsmanship: Actively participate in the design process, leveraging Figma to craft intuitive user journeys, wireframes, and polished visual interfaces.

Educations

Master’s in Business and Information Technology

IU International University of Applied Sciences | 2024 – Present
Distance Learning

BSc (Hons) Computing (Top-up)

University of Bolton | 2022
Academic Center Ras Al Khaimah, UEA

Advanced Certificate in Software Engineering

APTECH Computer Education | 2021
Riyadh, Saudi Arabia

Diploma in Information System Management

APTECH Computer Education | 2020
Riyadh, Saudi Arabia

Skils

  • UIKit
  • SwiftUI
  • Xcode/Swift
  • APNSa
  • AutoLayout
  • Storyboards, XIB
  • CoreData
  • Realm
  • JSON & XML
  • XCTest
  • MVC/MVVM
  • RxSwift
  • Git
  • MapKit/Google Map
  • RESTful APIs
  • Firebase

Projects

A collection of public projects highlighting my mobile engineering capabilities. Due to confidentiality agreements (NDAs), several commercial and enterprise-scale ecosystems I’ve built cannot be displayed publicly.