Yiannis Silver (Ioannis Silvestridis)
Available to hire
I’m Yiannis Silver, a mobile applications developer with a passion for building robust iOS and Android apps. I have a solid understanding of the app life cycle and deep knowledge of Swift and Kotlin, plus experience with Objective-C and Java, and a year of hands-on Flutter-Dart. I’m a person with 67% handicap disability, so I work remotely.
I’ve driven IT management tasks previously and pivoted to mobile development, delivering features ranging from location services and maps to social media integration and enterprise APIs. I’m eager to contribute to a product-driven team in a fully remote role.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
Greek, Modern
Fluent
English
Fluent
Work Experience
IT Manager at Silvestridis S.A.
August 1, 2014 - September 23, 2025Installed LAN networks and Windows XP PCs, managed UTP cabling, routers, switches, and hubs; maintained company website and intranet; migrated from DOS to Windows XP; managed Windows Server 2003 and KEFALEO ERP across 15 machines.
Junior iOS Developer at Mokaal
April 1, 2015 - September 23, 2025Involved in developing a Friendly Crash Report app and a social mobile app featuring Location Services, Beacons (BLE 4.0), Augmented Reality, Google Maps, and social media integration (Facebook, Twitter, Instagram) for iOS. Used ASANA, GitHub, and SourceTree for version control.
iOS Developer at Icon Platform
July 1, 2015 - September 23, 2025Developed solutions for issues in launched apps; worked on network calls and delegation to present data; Rest API integration; app promoted by peer-based marketing efforts; written in Objective-C.
iOS Developer at Enable Amea
January 1, 2016 - September 23, 2025Developed apps for people with disabilities; built a demo indoor navigation app using Cisco CMX and access points to determine device location; conducted R&D on mobile capabilities for visually impaired users.
iOS – Android Developer at Chemical Safety
October 1, 2018 - September 23, 2025Maintained, upgraded, and bug-fixed seven commercial applications (three Android, four iOS); XML Web Services, SQLite and Core Data databases; multi-data handling via web services; languages Java and Objective-C; Git for version control.
iOS – Android Developer at iproject
December 1, 2019 - September 23, 2025Maintaining and deploying iOS applications in the App Store, including Dominos app; added Firebase Analytics and Google Places API; handled translations and dialog boxes; finalized ekioksy's main app for the App Store.
iOS Developer at Softweb
September 1, 2022 - September 23, 2025Built a chat application with emphasis on MVVM patterns; introduced Combine framework to align with Apple advancements; focused on modern architectural patterns.
Mobile Applications Developer at i2s - AquaManager
August 1, 2024 - PresentNative development in Swift and Kotlin for iOS and Android; ported parts of native apps to Flutter for cross-platform delivery; explored hybrid approaches and wrote code targeting multiple platforms from Flutter.
IT Manager at Silvestridis S.A.
August 1, 2014 - September 23, 2025Installed LAN networks and Windows XP PCs, including cabling, routers, switches and hubs. Maintained company website and later intranet. Used Windows Server 2003 and KEFALEO ERP; migrated from DOS to Windows XP.
Junior iOS Developer at Mokaal
April 1, 2015 - September 23, 2025Developed a Friendly Crash Report application and a social app. Implemented features such as Location Services, Beacons (BLE 4.0), Augmented Reality, Google Maps, QR codes, audio recording, image manipulation, and social media integration (Facebook, Twitter, Instagram). Used ASANA, GitHub and SourceTree for version control.
iOS Developer at Icon Platform
July 1, 2015 - September 23, 2025Developed solutions for existing apps, worked with network calls and delegates to display data. Involved REST API web services and Swift/Objective-C codebase; contributed to a campaign app for Pearaeus Bank.
iOS Developer at Enable Amea
January 1, 2016 - September 23, 2025Developed applications for people with disabilities. Created a demo indoor navigation app using Cisco CMX for location on blueprints; conducted R&D into mobile device capabilities.
iOS – Android Developer at Chemical Safety
October 1, 2018 - September 23, 2025Maintained, upgraded and debugged seven commercial apps (three Android, four iOS). Worked with XML web services, SQLite/Core Data; managed data reads/writes across multiple app databases.
iOS – Android Developer at iproject
December 1, 2019 - September 23, 2025Maintained and deployed iOS applications in the App Store. Added features like Firebase Analytics and Google Places API; finalized ekioksy's main app, including translations and dialog flows.
iOS Developer at Softweb
September 1, 2022 - September 23, 2025Built a chat application with emphasis on MVVM and Clean MVVM. Introduced the Combine framework to align with evolving Apple frameworks.
Mobile Applications Developer at i2s-aquaManager
August 1, 2024 - PresentCurrently developing native iOS and Android components with Flutter (Dart). Porting parts of existing native apps to Flutter to enable cross-platform delivery; exploring hybrid approaches for efficiency.
IT Manager at Silvestridis S.A.
August 1, 2014 - September 23, 2025Installed LAN networks and Windows XP PCs; maintained company website and intranet; managed Windows Server 2003 and KEFALEO ERP; migrated from DOS to Windows XP for 15 machines.
Junior iOS Developer at Mokaal
April 1, 2015 - September 23, 2025Involved in developing a Friendly Crash Report application and a social mobile app, incorporating location services, QR code, audio recording, image manipulation, and SMTP mail clients; version-controlled with SourceTree and GitHub.
iOS Developer at Icon Platform
July 1, 2015 - September 23, 2025Developed solutions for existing apps, implemented network calls and delegates; worked with REST API web services; Objective-C.
iOS Developer at Enable Amea
January 1, 2016 - September 23, 2025Developed applications for people with disabilities; built indoor navigation demos using Cisco CMX; explored mobile-accessibility capabilities.
iOS – Android Developer at Chemical Safety
October 1, 2018 - September 23, 2025Maintained, upgraded and bug-fixed 7 commercial apps (3 Android, 4 iOS); worked with XML Web Services, SQLite and Core Data; used Git for version control.
iOS – Android Developer at iproject
December 1, 2019 - September 23, 2025Maintained and deployed iOS apps; added features like Firebase analytics and Google Places API; finalized ekioksy's main app; handled translations.
iOS Developer at Softweb
September 1, 2022 - September 23, 2025Built a chat application emphasizing MVVM patterns; introduced Combine framework for modern iOS development.
Mobile Applications Developer at i2s AquaManager
August 1, 2024 - PresentNative development in Swift and Kotlin; ported parts of native apps to Flutter for cross-platform delivery; contributed to multi-platform mobile solutions.
IT Manager at Silvestridis S.A.
August 31, 2014 - September 23, 2025Installed LAN network and Windows XP PCs, from UTP cabling to routers, switches and hubs. Maintained company website and later intranet. Used Windows Server 2003 and KEFALEO as ERP software; managed Windows XP on 15 machines. Migrated from DOS to Windows XP.
Junior iOS Developer at Mokaal
April 30, 2015 - September 23, 2025Developed a Friendly Crash Report application and contributed to a social mobile app with Location Services, Beacons (BLE 4.0), AR, Google Maps, QR codes, audio recording, drawing and image processing. Used ASANA, GitHub and SourceTree; versions controlled with GitHub and SourceTree.
iOS Developer at Icon Platform
July 31, 2015 - September 23, 2025Developed solutions for issues in existing apps; worked with network calls and delegates to present incoming data properly; REST API web services; written in Objective-C.
iOS Developer at Enable Amea
January 31, 2016 - September 23, 2025Developed applications for people with disabilities; indoor navigation capabilities with third party vocal commands library; used Cisco CMX servers and Access Points to determine device location on blueprints; R&D on mobile device capabilities.
iOS – Android Developer at Chemical Safety
October 31, 2018 - September 23, 2025Maintained and upgraded seven commercial applications (three Android and four iOS); handled XML Web Services, SQLite and Core Data; data managed via web services with database synchronization; Java and Objective-C; Git for version control.
iOS – Android Developer at iproject
December 31, 2019 - September 23, 2025Maintained and deployed iOS applications in the App Store; added features like Firebase Analytics and Google Places API; finalized ekioksy's main app for the App Store, including translations and dialog boxes.
iOS Developer at Softweb
September 30, 2022 - September 23, 2025Built a chat application with emphasis on design patterns such as MVVM and Clean MVVM. Introduced the Combine framework to align with Apple advancements.
Mobile Applications Developer at i2s-aquaManager
August 1, 2024 - PresentNative Swift and Kotlin development for iOS and Android. Ported Android-native components to Flutter; worked with a hybrid approach to produce cross‑platform apps. Continued porting parts of Android-native apps to Flutter for multi‑platform release.
IT Manager at Silvestridis S.A.
August 1, 2014 - September 23, 2025Installed LAN networks and Windows XP PCs; managed routing gear; maintained company website and Intranet; operated Windows Server 2003; used KEFALEO ERP; migrated from DOS to Windows XP.
Junior iOS Developer at Mokaal
April 1, 2015 - September 23, 2025Helped develop a Friendly Crash Report application with Google Maps, location services, QR codes, audio recording, drawing, and image manipulation; contributed to Mokaal social app featuring Location Services, Beacons (BLE 4.0), AR, and social media integration; version controlled with SourceTree and GitHub.
iOS Developer at Icon Platform
July 1, 2015 - September 23, 2025Developed solutions for issues in existing apps; worked with REST API web services and network calls; written in Objective-C; contributed to banking-related promotions.
iOS Developer at Enable Amea
January 1, 2016 - September 23, 2025Developed a demo app with indoor navigation using a third-party vocal commands library for the visually impaired, leveraging Cisco CMX servers for location tracking on provided blueprints; R&D into mobile capabilities.
iOS – Android Developer at Chemical Safety
October 1, 2018 - September 23, 2025Maintained and upgraded seven commercial apps (3 Android, 4 iOS); handled XML Web Services, SQLite and Core Data; data synchronization via web services; Java and Objective-C; Git for version control.
iOS – Android Developer at iproject
December 1, 2019 - September 23, 2025Maintained and deployed iOS applications; added features like Firebase Analytics and Google Places API; handled translations and in-app dialogs; finalized ekioksy's main app for the App Store.
iOS Developer at Softweb
September 1, 2022 - September 23, 2025Built a chat application with emphasis on MVVM; introduced Combine framework to align with Apple technologies; focused on architecture and modern UI/UX practices.
Mobile Applications Developer at i2s-aquaManager
August 1, 2024 - PresentCurrently developing native Swift and Kotlin apps; porting parts to Flutter for cross-platform delivery; remote work; many modules being ported and updated for dual-platform availability.
IT Manager at Silvestridis S.A.
August 1, 2014 - September 23, 2025Installed LAN networks and Windows XP workstations, managed the company’s website and intranet, and maintained Windows Server 2003 and KEFALEO ERP. Migrated from DOS to Windows XP across 15 machines.
Junior iOS Developer at Mokaal
April 1, 2015 - September 23, 2025Developed a Friendly Crash Report application and an iOS social app with Location Services, Beacons (BLE 4.0), Augmented Reality, Google Maps, and social media integration; used Asana, GitHub, and SourceTree; version-controlled with GitHub/SourceTree.
iOS Developer at Icon Platform
July 1, 2015 - September 23, 2025Developed solutions for issues in launched apps, focusing on network calls and data presentation; worked on a corporate app and a French deals app; REST APIs and Objective-C.
iOS Developer at Enable Amea
January 1, 2016 - September 23, 2025Developed applications for people with disabilities; created a demo app with indoor navigation using Cisco CMX and third-party vocal command libraries.
iOS – Android Developer at Chemical Safety
October 1, 2018 - September 23, 2025Maintained, upgraded and debugging 7 commercial apps (3 Android and 4 iOS); XML Web Services, SQLite and Core Data; Java and Objective-C; Git used for version control.
iOS – Android Developer at iproject
December 1, 2019 - September 23, 2025Maintained and deployed iOS applications; added features like Firebase Analytics and Google Places API; finalized main app for the App Store; translations and dialog boxes.
iOS Developer at Softweb
September 1, 2022 - September 23, 2025Built a chat application with MVVM and Clean MVVM; introduced Combine framework to keep up with Apple developments.
Mobile Applications Developer at i2s-aquaManager
August 1, 2024 - PresentDeveloped native Swift and Kotlin code for cross-platform aspects; ported native apps to Flutter to enable iOS/Android; focused on cross-platform efficiency.
Education
Master of Science in Computer Networks at Middlesex University, London, United Kingdom
January 11, 2030 - January 1, 2003Bachelor of Science in Computer Science at Westminster University, London, United Kingdom
January 11, 2030 - January 1, 2001Master of Science in Computer Networks at Middlesex University
January 11, 2030 - January 1, 2003Bachelor of Science in Computer Science at Westminster University
January 11, 2030 - January 1, 2001Master of Science in Computer Networks at Middlesex University, United Kingdom, London
January 11, 2030 - January 1, 2003Bachelor of Science in Computer Science at Westminster University United Kingdom, London
January 11, 2030 - January 1, 2001Master of Science in Computer Networks at Middlesex University, London, United Kingdom
January 11, 2030 - January 1, 2003Bachelor of Science in Computer Science at Westminster University, London, United Kingdom
January 11, 2030 - January 1, 2001Master of Science in Computer Networks at Middlesex University United Kingdom, London
January 11, 2030 - January 1, 2003Bachelor of Science in Computer Science at Westminster University United Kingdom, London
January 11, 2030 - January 1, 2001Master of Science in Computer Networks at Middlesex University United Kingdom, London
January 11, 2030 - January 1, 2003Bachelor of Science in Computer Science at Westminster University United Kingdom, London
January 11, 2030 - January 1, 2001Qualifications
Industry Experience
Software & Internet, Computers & Electronics, Professional Services, Media & Entertainment, Education
This app that I built 95% to completence, I did completely on my own, with only the native android app developed earlier to guide me.It was a hatchery fish tracking for aqua culture fish farmers or scientists that want to track the hatchery progress.I can provide the working ipa and apk files , for the employer to have a look.
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