Ahmed is available for hire
Hire AhmedAhmed Elsayed
Verified Expert in Engineering
Software Developer
Alexandria, Alexandria Governorate, Egypt
Toptal member since February 24, 2026
Bio
Ahmed is a software engineer specializing in iOS development, with a focus on applying algorithms to real-world tasks. He has led the development of key features for apps like JustPark, reducing crashes by over 25% and improving performance by 40%. Ahmed mentors junior developers and excels in designing scalable architectures, with expertise spanning industries such as transportation and healthcare.
Portfolio
JustPark
iOS, Swift, SwiftUI, CI/CD Pipelines, Bitrise, GitHub, GitHub Actions, REST...
Refd | رفد
iOS, Swift, SwiftUI, Firebase, Push Notifications, Analytics, Online Payments...
Sabq
Swift, iOS, SwiftUI, REST, Firebase, Push Notifications, RxSwift, Combine
Experience
- Jira - 10 years
- Git - 10 years
- iOS - 8 years
- Swift - 8 years
- CI/CD Pipelines - 5 years
- Android - 4 years
- SwiftUI - 3 years
- React Native - 2 years
Preferred Environment
The most amazing...
...project I've led is developing key features for the JustPark app, reducing crashes by 25% and boosting performance by 40%, enhancing user satisfaction.
Work Experience
Senior iOS Engineer
2021 - PRESENT
JustPark
- Led the development of key features and functionalities for the iOS application, collaborating closely with cross-functional teams, including product management, design, and back-end developers.
- Reduced app crashes by over 25% and improved performance by over 40%, solving major user complaints.
- Mentored junior developers by conducting code reviews, technical sessions, and pair programming, enhancing team skill levels and maintaining high-quality standards.
- Designed and implemented scalable and maintainable application architecture, ensuring performance optimization and adherence to best practices.
Technologies: iOS, Swift, SwiftUI, CI/CD Pipelines, Bitrise, GitHub, GitHub Actions, REST, Firebase, Analytics, Push Notifications, Siri, CarPlay, APIs, Online Payments, RxSwift, Combine
Senior iOS Engineer
2023 - 2024
Refd | رفد
- Developed and maintained iOS applications for REFD Customer and Caregiver from scratch with the latest iOS frameworks and tools.
- Designed and implemented scalable and maintainable application architecture, ensuring performance optimization and adherence to best practices.
- Integrated 3rd-party libraries, frameworks, and APIs to enhance application functionality, such as integrating analytics tools, push notifications, and social media integration.
Technologies: iOS, Swift, SwiftUI, Firebase, Push Notifications, Analytics, Online Payments, RxSwift, Combine
Senior iOS Engineer
2022 - 2023
Sabq
- Developed and maintained the iOS applications for Sabq from scratch with the latest iOS frameworks and tools.
- Designed and implemented scalable and maintainable application architecture, ensuring performance optimization and adherence to best practices.
- Integrated third-party libraries, frameworks, and APIs to enhance application functionality, such as integrating analytics tools, push notifications, and social media integration.
- Utilized CircleCI and Fastlane in GitHub for iOS CI/CD.
Technologies: Swift, iOS, SwiftUI, REST, Firebase, Push Notifications, RxSwift, Combine
Senior iOS Engineer
2019 - 2022
Blink22
- Worked on real-time projects using cutting-edge technologies and developing apps.
- Built applications for web and mobile in Java, Kotlin, Swift, React Native, React, Ruby on Rails, and Node.js.
- Developed microservices and web services leveraging AWS, REST, SOAP, XML, and SOA.
Technologies: Swift, iOS, SwiftUI, Android, Kotlin, React Native, Firebase, REST, GraphQL, APIs, Analytics, CI/CD Pipelines, Online Payments, RxSwift, Combine
iOS Engineer
2017 - 2018
Incorta
- Designed, developed, and tested an augmented reality app to transform the user's whole desk into a workstation with spreadsheets, drop sheets, and 3D charts as if they were real objects.
- Developed eCommerce apps for online trading and shopping.
- Worked with APIs, Apple ARKit, SceneKit (3D/OpenGL), WebKit, StoreKit, and Google Maps API.
Technologies: iOS, Swift, Online Payments
Experience
JustPark Parking
https://apps.apple.com/gb/app/justpark-parking/id519652671JustPark is the UK's and the US's favourite parking app, designed to give drivers a simple, flexible, and intuitive way to find, book, and manage parking. With over 14 million drivers and over 250,000 spaces, the platform supports reservations, on-demand parking, airport parking, and monthly parking in one all-in-one app.
Drivers can pay through the app with options such as Pay on Arrival, Pay on Exit, AutoPay, and real-time session extensions. The app also integrates with Siri, Google Assistant, and in-car systems like Apple CarPlay, enabling drivers to book parking even while on the move. JustPark has a 4.8-star rating on the App Store.
Drivers can pay through the app with options such as Pay on Arrival, Pay on Exit, AutoPay, and real-time session extensions. The app also integrates with Siri, Google Assistant, and in-car systems like Apple CarPlay, enabling drivers to book parking even while on the move. JustPark has a 4.8-star rating on the App Store.
Fajr App
https://apps.apple.com/ae/app/fajr-fajr-alarm-prayer-times/id6468405243Fajr App is a smart and purposeful alarm application designed to help users wake up consistently for Fajr prayer with discipline and intention. It combines customizable alarm challenges, gradual wake-up sounds, snooze control, and accountability features to ensure users don’t simply dismiss the alarm and go back to sleep. The app also features a clean, distraction-free interface.
Sabq News
Sabq News is a leading Saudi digital news platform delivering fast, reliable, and up-to-date coverage across local, regional, and international topics. Sabq covers politics, economy, technology, sports, and social issues with a strong digital-first approach. The app focuses on timely reporting and audience engagement, making it one of the most recognized online news sources in Saudi Arabia.
REFD | Customer and Caregiver
https://apps.apple.com/sa/app/refd-caregiver/id1522310921REFD | Customer and Caregiver is a digital platform designed to connect customers with qualified caregivers through a streamlined and user-friendly experience. The app enables families to find, manage, and communicate with caregivers efficiently, while providing caregivers with structured tools to organize their schedules, assignments, and client interactions.
Education
2022 - 2026
PhD in Computer Science
Alexandria University - Alexandria, Egypt
2018 - 2022
Master's Degree in Computer Science
Alexandria University - Alexandria, Egypt
2013 - 2018
Bachelor's Degree in Computer Engineering
Alexandria University - Alexandria, Egypt
Skills
Libraries/APIs
RxSwift
Tools
Git, Jira, GitHub
Languages
Swift, Kotlin, GraphQL
Frameworks
SwiftUI, Combine, React Native
Platforms
iOS, Android, Bitrise, Firebase
Paradigms
REST
Other
Online Payments, CI/CD Pipelines, Email, Computer Engineering, Machine Learning, Natural Language Processing (NLP), Artificial Intelligence (AI), Computer Science, Computer Vision, Image Processing, GitHub Actions, Push Notifications, Analytics, Siri, CarPlay, APIs
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