Available to hire
I’m a software engineer with 25+ years of experience delivering clean, scalable mobile apps. Over the last decade I’ve specialized in iOS and Android development, building more than 20 applications across finance, gaming, travel, healthcare and enterprise sectors. I pride myself on pixel-perfect UI, robust architectures, and collaborating effectively with cross-functional teams.
I’m based in London and available immediately. I contribute to public repos on GitHub and enjoy mentoring teammates, adopting SOLID principles, and exploring new tech like BLE and AI-assisted workflows.
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Turkish
Fluent
Work Experience
Senior Mobile Developer at Ground Control
August 31, 2025 - October 1, 2025Developed iOS and Android applications for ground services contractors; modernized two legacy apps to support latest OS versions and store requirements; implemented MVVM/MVC, DI with Dagger; applied Clean Architecture; authored unit tests; participated in CI/CD and PR reviews using Azure DevOps.
Senior Mobile Developer at Best Buy Health
March 31, 2025 - October 1, 2025Developed iOS and Android apps for remote patient monitoring with BLE device integrations; designed and implemented MVVM/MVC patterns; Clean Architecture; unit tests; CI/CD with Bitrise; Git Flow; code reviews across platforms.
Senior Mobile Developer at Sporting Group
November 30, 2023 - October 1, 2025Contributed to iOS and Android applications for sport trading and betting software; implemented multi-factor authentication; wrote unit tests (XCTest); applied DI with Dagger; Clean Architecture and CI/CD; Git Flow.
Senior Mobile Developer at Radiodetection
September 30, 2021 - October 1, 2025Built a cross‑platform mobile application to communicate with locator devices and cloud services; used Kotlin Multiplatform; applied Clean Architecture and SOLID principles; implemented unit tests and CI/CD.
Lead Mobile Developer at Zego PH via Elsewhen Ltd
September 30, 2020 - October 1, 2025Led development of native iOS and Android applications; architected Driving Analysis SDK (Drivit) for iOS and Android; ensured high test coverage; leveraged MVVM; targeted Kotlin and Swift.
Lead Mobile Developer at Imperial College London
July 31, 2020 - October 1, 2025Architected and developed anonymous COVID-19 app for students and lecturers; built native iOS and Android apps and an Ionic prototype; utilized BLE beacons for location tracking; documented work in Confluence.
Lead Mobile Developer at Marco Technologies
December 31, 2019 - October 1, 2025Developed a next‑generation car‑sharing application; led a mobile team of 5; used Swift and Java/Kotlin; implemented analytics with Mixpanel and Crashlytics; wrote unit tests.
Lead Mobile Developer at Brightmile
February 28, 2019 - October 1, 2025Architected Android and iOS apps to assess driving behavior using phone sensors and BLE beacons; implemented background services; integrated C/C++ libraries; led a mobile team of 5; added analytics and unit tests.
Lead iOS Developer at Jinn
August 31, 2017 - October 1, 2025Led iOS development for a food delivery platform; contributed to WatchOS app; implemented location services; integrated Mixpanel for analytics and used A/B testing variables; guided a small iOS team.
Senior iOS Developer at Draewil Limited
May 31, 2017 - October 1, 2025Developed iOS consumer application and contributed to Android driver app; created Apple Watch extension UI; used Realm, GitHub, and CocoaPods; implemented location services and unit tests.
Senior iOS Developer at Stoneship
February 28, 2017 - October 1, 2025Developed Forevr and a chat app; used RxSwift/ReactiveCocoa, Realm; implemented push notifications; collaborated with CI (Travis-CI); used SignalR for chat features; contributed to app testing.
Senior iOS/Android Developer at DeltaRail Group
September 30, 2016 - October 1, 2025Worked on CommuteLondon project; built iOS/Android apps; implemented geofences, CoreLocation, push notifications; integrated analytics (Mixpanel/Fabric); contributed to Journey Matcher using location logs.
Senior Mobile Developer, Contractor at Interoute Communications
December 31, 2013 - October 1, 2025Developed iOS, Android and Mac desktop clients for CloudStore/ZettaBox and VDC products; cross‑platform work; included C++ components; contributed to various mobile platforms.
Senior Mobile Software Engineer at Idea eLearning
May 31, 2012 - October 1, 2025Developed iOS and Android applications for an ING Bank eLearning initiative; integrated Moodle backend to download lessons and track progress.
Mobile Software Engineer at Philip Morris International
February 28, 2011 - October 1, 2025Developed field management and distribution software for Windows Mobile; worked with .NET C#, SOAP XML Web Services; led mobile development efforts.
Development Manager of Mobile Applications at British American Tobacco
August 31, 2009 - October 1, 2025Led a mobile development team of 6; Windows Mobile applications; Bluetooth invoice printing; SOAP/XML, Oracle and SQL Server; practiced OOP and design patterns.
Software Engineer at Biltas A.S.
December 31, 2005 - October 1, 2025Hotel front office project; implemented phone interface to phone-deck via Serial Port; added reservation workflow and UI components.
Software Engineer at Prodat Proses A.S.
June 30, 2002 - October 1, 2025Developed PLC/SCADA applications for cement factories; used Visual Basic 5.0 and Delphi; SQL Server for database operations.
Senior Mobile Developer at Ground Control, UK
August 1, 2025 - October 1, 2025Developed iOS and Android applications used by ground control contractors; updated legacy apps and libraries to support latest OS versions and store requirements; implemented Design Patterns (MVVM, MVC), Dependency Injection with Dagger, Clean Architecture; built unit tests and CI/CD; used Azure DevOps and reviewed PRs on both platforms.
Senior Mobile Developer at Best Buy Health, UK & US
March 1, 2025 - October 1, 2025Developed iOS and Android apps enabling remote patient monitoring via BLE-enabled medical devices; designed device integrations; applied MVVM/MVC and Clean Architecture; implemented unit tests and CI/CD (Bitrise); used Git Flow and conducted PR reviews.
Senior Mobile Developer at Sporting Group, UK & CA
November 1, 2023 - October 1, 2025Developed iOS and Android applications for a sport trading/betting platform; implemented Multi-Factor Authentication for secure login; designed and implemented with MVVM/MVC; used Dagger for DI; Clean Architecture; wrote tests; CI/CD; Git Flow.
Senior Mobile Developer at Radiodetection, UK & USA
September 1, 2021 - October 1, 2025Built multi-platform mobile applications communicating with locator devices; used Kotlin Multiplatform; applied Clean Architecture and SOLID principles; implemented unit tests and CI; BLE/device integration.
Lead Mobile Developer at Zego PH via Elsewhen Ltd, UK
September 1, 2020 - October 1, 2025Developed native iOS and Android Driving Analysis applications; architected and integrated the Drivit SDK for iOS/Android; wrote tests with XCTest; used MVVM; achieved high test coverage; Swift and Kotlin.
Lead Mobile Developer at Imperial College London, UK
July 1, 2020 - October 1, 2025Architected and developed an anonymous Covid-19 app for students and lecturers; native iOS and Android; leveraged Ionic for some components; used BLE Beacons for location context; documented work in Confluence.
Lead Mobile Developer at Marco Technologies, UK
December 1, 2019 - October 1, 2025Developed the next-generation car-sharing application; led a mobile team of 5; implemented iOS/Android native apps; analytics integration (Mixpanel, Crashlytics); used CocoaPods and Gradle; wrote unit tests.
Lead Mobile Developer at Brightmile, UK
February 1, 2019 - October 1, 2025Led mobile development for an app assessing driving behavior using phone sensors and BLE beacons; implemented background services on Android; integrated BLE beacons; analytics with Mixpanel/Crashlytics; led a team of 5 developers.
Lead iOS Developer at Jinn, UK
August 1, 2017 - October 1, 2025Led iOS development to improve the iOS client and contributed to Watch OS; used Xcode, Swift, and Objective-C; implemented location services and analytics; led a team of 2 developers.
Senior iOS Developer at Draewil Limited, UK
May 1, 2017 - October 1, 2025Developed iOS consumer application; contributed to Android driver app; implemented Apple Watch extension UI; worked with Swift/Objective-C; Realm; Github; Cocoapods; location services; unit tests.
Senior iOS Developer at Stoneship, UK
February 1, 2017 - October 1, 2025Developed Forevr app and a chat app; used RxSwift, ReactiveCocoa, Realm; Github, Travis-CI; implemented push notifications and unit tests; led a small team of 2 developers.
Senior iOS/Android Developer at DeltaRail Group, UK
September 1, 2016 - October 1, 2025Worked on the CommuteLondon project; developed iOS/Android apps; journey matching from location logs; geofences and CoreLocation; push notifications; analytics with Mixpanel/Fabric; enterprise app store releases.
Senior Mobile Developer, Contractor at Interoute Communications, UK
December 1, 2013 - October 1, 2025CloudStore project (ZettaBox); iOS, Android, and Mac Desktop Client; extended to VDC iOS/Android; Agile SCRUM; SVN/TFS; occasional C++ work; multiple platforms.
Senior Mobile Software Engineer at Idea eLearning, Turkey
May 1, 2012 - October 1, 2025Mobile engineer for ING Bank initiative; developed iOS and Android apps; Moodle backend integration to download lessons and track progress.
Mobile Software Engineer at Philip Morris International, Turkey
February 1, 2011 - October 1, 2025Mobile field management and distribution software for Windows Mobile; .NET CF and C#; SOAP XML Web Services; contributed to field software solutions.
Development Manager of Mobile Applications at British American Tobacco, Turkey
August 1, 2009 - October 1, 2025Development manager for mobile apps; Windows Mobile platform; Bluetooth invoice printing; .NET/C#; Oracle/MS SQL; Java for BlackBerry; led a team of 6 developers.
Software Engineer at Biltas A.S., Turkey
June 1, 2002 - October 1, 2025Hotel Front Office project; implemented a phone interface to connect to phone-deck via Serial Port; added reservation workflow; Delphi; OOP; SQL Server.
Software Engineer at Prodat Proses A.S., Turkey
June 1, 2002 - October 1, 2025PLC/SCADA applications for cement factories; Visual Basic 5.0 and Delphi; SQL Server; development across factory automation needs.
Senior Mobile Developer at Ground Control
August 1, 2025 - October 1, 2025Led mobile development for Ground Control's iOS and Android apps, updated legacy apps, implemented MVVM and MVC patterns, used DI with Dagger, and applied Clean Architecture and SOLID principles. Implemented unit tests and CI/CD; used Azure DevOps and reviewed PRs on both platforms.
Senior Mobile Developer at Best Buy Health, UK & US
March 1, 2025 - October 1, 2025Developed iOS and Android applications for remote patient monitoring using BLE-enabled devices. Implemented BLE device integrations, MVVM and Clean Architecture, and CI/CD pipelines (Bitrise). Followed Git Flow and conducted PR reviews across platforms.
Senior Mobile Developer at Sporting Group
November 1, 2023 - October 1, 2025Contributed to iOS and Android applications for sport trading and betting software. Implemented multi-factor authentication, MVVM/MVC, DI, CI/CD, and maintained a strong testing culture.
Senior Mobile Developer at Radiodetection
September 1, 2021 - October 1, 2025Built multi-platform mobile applications using Kotlin Multiplatform, following Clean Architecture and SOLID principles. Implemented unit tests and CI/CD pipelines.
Lead Mobile Developer at Zego PH via Elsewhen Ltd
September 1, 2020 - October 1, 2025Led native iOS and Android development for driving analysis; Architected Drivit SDK for both platforms; wrote tests in XCTest; leveraged MVVM; used Kotlin and Swift; implemented related analytics and publishing flow.
Lead Mobile Developer at Imperial College London
July 1, 2020 - October 1, 2025Architected and developed anonymous Covid-19 app for students and lecturers; led college developers; used Ionic Framework; integrated BLE beacons for location awareness.
Lead Mobile Developer at Marco Technologies
December 1, 2019 - October 1, 2025Developed next generation car-sharing application; led a mobile team of 5 developers; implemented MVVM patterns and analytics integration; used Swift, Java and Kotlin.
Lead Mobile Developer at Brightmile
February 1, 2019 - October 1, 2025Led Android and iOS development; implemented background services, BLE beacons, and car identification; integrated Mixpanel and Crashlytics; led a team of 5 developers.
Lead iOS Developer at Jinn
August 1, 2017 - October 1, 2025Led iOS development for a food delivery platform; contributed to the WatchOS app; implemented location services and analytics integration; mentored a small team.
Senior iOS Developer at Draewil Limited
May 1, 2017 - October 1, 2025Developed iOS consumer application and contributed to Android driver app; built Watch extension UI; managed dependency handling with Cocoapods and GitHub.
Senior iOS Developer at Stoneship
February 1, 2017 - October 1, 2025Developed Forevr app and a chat app; implemented RxSwift, ReactiveCocoa, Realm; collaborated with teams using GitHub and Travis-CI; implemented push notifications.
Senior iOS/Android Developer at DeltaRail Group
September 1, 2016 - October 1, 2025Developed CommuteLondon Android and iOS apps; built Journey Matcher from location logs; implemented geofences, CoreLocation, push notifications; used Mixpanel for analytics.
Senior Mobile Developer, Contractor at Interoute Communications
December 1, 2013 - October 1, 2025Developed iOS, Android, and Mac desktop clients for CloudStore/ZettaBox; contributed to multiple projects with C++, Swift, Java and Objective-C; worked in SCRUM environment.
Senior Mobile Software Engineer at Idea eLearning
May 1, 2012 - October 1, 2025Built mobile apps for Idea eLearning leveraging Moodle backend; ensured mobile delivery of courses and progress tracking.
Mobile Software Engineer at Philip Morris International
February 1, 2011 - October 1, 2025Developed field management and distribution software for Windows Mobile; contributed to mobile tooling and workflows.
Development Manager of Mobile Applications at British American Tobacco
August 1, 2009 - October 1, 2025Led a mobile development team (6 developers) delivering Windows Mobile based field management and distribution solutions; Bluetooth invoice printing; SOAP XML Web Services; mentored engineers.
Software Engineer at Biltas A.S.
December 1, 2005 - October 1, 2025Worked on Hotel Front Office project; implemented device interfacing and reservation workflow; contributed to system integration.
Software Engineer at Prodat Proses A.S.
June 1, 2002 - October 1, 2025Developed PLC/SCADA applications for cement factories; implemented software components interfacing with industrial hardware.
Senior Mobile Developer at Ground Control
August 1, 2025 - October 1, 2025Senior Mobile Developer contributing to iOS and Android apps used by ground control contractors. Updated legacy apps to support latest OS versions, implemented MVVM/MVC patterns, dependency injection with Dagger, Clean Architecture, SOLID, unit tests, and CI/CD automation. Collaborated via Azure DevOps and reviewed PRs.
Senior Mobile Developer at Best Buy Health
March 31, 2025 - October 1, 2025Senior Mobile Developer responsible for iOS and Android apps enabling remote patient monitoring with BLE medical devices. Implemented device integrations, design patterns (MVVM/MVC), Clean Architecture, SOLID, unit tests, and CI/CD (Bitrise).
Senior Mobile Developer at Ground Control
April 1, 2024 - October 1, 2025Senior Mobile Developer for two ground control apps. Built iOS (Swift + SwiftUI) and Android (Kotlin + Jetpack Compose) apps, updated legacy apps, implemented MVVM/MVC, Dagger, Clean Architecture, SOLID, unit tests, and CI/CD; Azure DevOps and PR reviews.
Senior Mobile Developer at Sporting Group
November 1, 2023 - October 1, 2025Senior Mobile Developer for iOS and Android apps in Sport Trading and Betting software. Implemented Multi-Factor Authentication, wrote XCTest tests, and applied MVVM/MVC with Clean Architecture and CI/CD; utilized Git Flow.
Senior Mobile Developer at Radiodetection
September 1, 2021 - October 1, 2025Senior Mobile Developer delivering multi-platform mobile app with Kotlin Multiplatform, Clean Architecture and SOLID principles. Implemented unit tests and CI/CD.
Lead Mobile Developer at Zego PH via Elsewhen Ltd
September 1, 2020 - October 1, 2025Led/mobile development for Zego Private Hire Driving Analysis SDK integration on iOS and Android. Implemented driving analysis features, wrote tests with XCTest, and used Swift (iOS) and Kotlin (Android).
Lead Mobile Developer at Imperial College London
July 1, 2020 - October 1, 2025Architected and developed an anonymized COVID-19 app for students and lecturers; led a college development team, used Ionic Framework, BLE and Beacons for location-based features.
Lead Mobile Developer at Marco Technologies
December 1, 2019 - October 1, 2025Led mobile development for next-generation car-sharing apps; architected native iOS/Android apps, led a mobile team, implemented MVVM, used Java/Kotlin, and integrated analytics (Mixpanel, Crashlytics).
Lead Mobile Developer at Brightmile
February 1, 2019 - October 1, 2025Led mobile development for Brightmile (Kamet Ventures). Architected and built native Android and iOS apps, implemented background services, BLE beacon integration, and analytics; managed a team of 5 developers.
Lead iOS Developer at Jinn
August 1, 2017 - October 1, 2025Led iOS team to modernize iOS client and driver apps; contributed to watchOS extension, implemented location services, analytics (Mixpanel, Fabric, Crashlytics), and A/B testing variables.
Senior iOS Developer at Draewil Limited
May 1, 2017 - October 1, 2025Developed consumer iOS app and contributed to driver app; implemented location services, calendar features, and unit tests; worked with Realms for responsive data storage.
Senior iOS Developer at Stoneship
February 1, 2017 - October 1, 2025Developed Forevr contact management app and a chat app using RxSwift, ReactiveCocoa, Realm; implemented push notifications and unit tests; collaborated in an agile environment.
Senior iOS/Android Developer at DeltaRail Group
September 1, 2016 - October 1, 2025Developed CommuteLondon iOS/Android applications and internal apps; implemented geofences, CoreLocation, push notifications; contributed analytics via Mixpanel/Fabric.
Senior Mobile Developer (Contractor) at Interoute Communications
May 1, 2012 - October 1, 2025Created iOS/Android/Mac Desktop clients for ZettaBox Cloud Store; adopted C++ where needed; worked with SVN/TFS, Agile methodologies.
Senior Mobile Software Engineer at Idea eLearning
May 1, 2012 - October 1, 2025Developed iOS and Android apps for eLearning; interfaced with Moodle backend; tracked student progress and delivered lessons and quizzes.
Mobile Software Engineer at Philip Morris International
February 1, 2011 - October 1, 2025Mobile field management and distribution software for Windows Mobile; Bluetooth invoicing and SOAP/XML web services with .NET/C#; led a team of six developers.
Development Manager of Mobile Applications at British American Tobacco
August 1, 2009 - October 1, 2025Led mobile team for field management and distribution solutions; Bluetooth invoicing, Windows Mobile development, and backend integration with Oracle/MySQL; managed six developers.
Software Engineer at Bil Tas A.S.
December 1, 2005 - October 1, 2025Developed hotel front office interfaces, phone integration, and occupancy workflow enhancements; Delphi, Pascal, and SQL Server backend.
Software Engineer at Prodat Process A.S.
June 1, 2002 - October 1, 2025Developed PLC/SCADA applications for cement factories; Visual Basic, Delphi, SQL Server backend; gained experience in industrial software development.
Senior Mobile Developer at Ground Control
August 1, 2025 - August 1, 2025Led mobile development for two iOS and Android apps used by ground control contractors in the UK. Updated legacy apps to support latest OS versions and store requirements. Implemented Clean Architecture with MVVM/MVC, with dependency injection using Dagger, and applied SOLID principles. Built testable code with unit tests and CI/CD pipelines; collaborated with design, backend, and product teams using Azure DevOps.
Senior Mobile Developer at Best Buy Health, UK & US
March 1, 2025 - March 1, 2025Contributed to iOS and Android applications enabling remote patient monitoring through BLE-enabled medical devices (blood pressure, glucose, ECG, spirometry). Designed and implemented new device integrations; applied MVVM/MVC and Clean Architecture. Implemented unit tests and CI/CD (Bitrise); followed Git Flow and code reviews across platforms.
Senior Mobile Developer at Sporting Group
November 1, 2023 - November 1, 2023Developed iOS and Android apps for sport trading and betting; implemented multi-factor authentication; authored tests with XCTest; applied Clean Architecture with SOLID; established CI/CD; used Dagger for DI; collaborated via Git Flow.
Senior Mobile Developer at Radiodetection
September 1, 2021 - September 1, 2021Built cross-platform mobile app with Kotlin Multiplatform to communicate with locator devices via Bluetooth. Implemented Clean Architecture and SOLID; wrote unit tests; set up CI/CD; integrated cloud services.
Lead Mobile Developer at Zego PH via Elsewhen Ltd
September 1, 2020 - September 1, 2020Architected native iOS and Android apps; developed Driving Analysis SDK (Drivit) for iOS and Android; wrote high-coverage tests (XCTest); used Swift and Kotlin; applied MVVM; delivered on-time.
Lead Mobile Developer at Imperial College London
July 1, 2020 - July 1, 2020Architected anonymous Covid-19 app for students and lecturers; developed native iOS and Android apps; led college developers; used Ionic Framework; BLE beacons to identify proximity; documented work in Confluence.
Lead Mobile Developer at Marco Technologies
December 1, 2019 - December 1, 2019Developed next-generation car-sharing app; led a mobile team of 5; implemented MVVM using Swift/Java/Kotlin; integrated Mixpanel and Crashlytics; unit tests; CocoaPods and Gradle for dependency management.
Lead Mobile Developer at Brightmile
February 1, 2019 - February 1, 2019Led Android and iOS apps for driving behavior assessment using phone sensors and BLE beacons; implemented background services; integrated BLE; analytics with Mixpanel/Crashlytics; mentored a team of 5.
Lead iOS Developer at Jinn
August 1, 2017 - August 1, 2017Lead iOS development for a food delivery platform; re-architected iOS client; contributed to WatchOS; used Swift and Objective-C; implemented location services; integrated Mixpanel analytics; unit tests; led a small team.
Senior iOS Developer at Draewil Limited
May 1, 2017 - May 1, 2017Developed iOS consumer app and contributed to Android driver app; implemented Apple Watch extension UI; used Swift; Realm; Github; Cocoapods; location services; unit tests.
Senior iOS Developer at Stoneship
February 1, 2017 - February 1, 2017Developed Forevr contact management and a chat app; used RxSwift, ReactiveCocoa and Realm; GitHub and Travis-CI; implemented push notifications; unit tests.
Senior iOS/Android Developer at DeltaRail Group
September 1, 2016 - September 1, 2016Worked on CommuteLondon Android/iOS apps; journey matching from location logs; enterprise app development; geofences, CoreLocation, push notifications; Mixpanel/Fabric analytics; rapid feature delivery.
Senior Mobile Developer, Contractor at Interoute Communications
December 1, 2013 - December 1, 2013Developed iOS, Android and Mac Desktop clients for CloudStore/ZettaBox; cross-platform responsibilities; Android SDK, iOS SDK, C++ where needed; Agile; SVN/TFS.
Senior Mobile Software Engineer at Idea eLearning
May 1, 2012 - May 1, 2012Mobile engineer delivering iOS and Android apps for ING Bank eLearning; integrated Moodle backend to download lessons, quizzes and track progress.
Mobile Software Engineer at Philip Morris International
February 1, 2011 - February 1, 2011Mobile field management and distribution software for Windows Mobile; developed in Visual Studio, .NET CF and C#; SOAP XML Web Services.
Development Manager of Mobile Applications at British American Tobacco
August 1, 2009 - August 1, 2009Development Manager of Mobile Applications; led a mobile team of 6; Windows Mobile application, Bluetooth invoice printing; .NET CF; Oracle/SQL; Java for BlackBerry; guidance and delivery for multiple projects.
Software Engineer at Prodat Proses A.S.
June 1, 2002 - June 1, 2002Developed PLC/SCADA applications for cement factories; Visual Basic 5.0 and Delphi; SQL Server; OOP and design patterns; contributed to manufacturing automation.
Education
Qualifications
BS. in Computer Science
January 11, 2030 - October 1, 2025BS in Computer Science
January 11, 2030 - October 1, 2025BS in Computer Science
January 11, 2030 - October 1, 2025BS. in Computer Science
January 11, 2030 - October 1, 2025BS in Computer Science
January 11, 2030 - November 14, 2025Industry Experience
Software & Internet, Healthcare, Gaming, Education, Transportation & Logistics, Travel & Hospitality, Professional Services, Telecommunications, Media & Entertainment, Financial Services, Consumer Goods
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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