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Senior iOS Developer

  • 90€/Stunde
  • 13189 Berlin
  • Umkreis (bis 200 km)
  • en  |  de  |  ro
  • 07.08.2020


I have been working on iOS Projects for over 5 years, in Objective-C and Swift, for startups, marketing projects, as well as bigger projects for companies like XING and eBay with various architectures and frameworks (RxSwift, Fastlane, MVVM, VIPER).

Ich biete

  • iOS Entwicklung
  • Mobile Entwicklung (allg.)

Projekt‐ & Berufserfahrung

Freelance iOS Developer
Durstexpress GmbH, Berlin
5/2020 – 6/2020 (2 Monate)

5/2020 – 6/2020


- support the feature development process of a much anticipated consumer app
- contribute to a scalable architecture and build the base of an easily-extendable and well-maintainable application
- facilitate continuous integration and continuous delivery processes

Eingesetzte Qualifikationen


Freelance iOS Developer
OLX Group, Berlin
11/2019 – 5/2020 (7 Monate)
IT & Entwicklung

11/2019 – 5/2020


- main facilitator of an overall redesign across multiple global iOS applications
- introduce a design system with reusable components
- consultation in regards to iOS Design Guidelines and best practices for mobile UI/UX

Eingesetzte Qualifikationen

iOS, Mobile Entwicklung (allg.)

Senior iOS Engineer (Festanstellung)
eBay, Berlin
6/2018 – 10/2019 (1 Jahr, 5 Monate)

6/2018 – 10/2019


- design and implement features related to filtering and search experiences
- take architectural decisions for reusable components used on various eBay markets
- contribute to the adoption of a VIPER architecture to have a testable and scalable code base
- foster the usage of Reactive Programming, analytics insights, Fastlane and Metaprogramming - build experiments that enabled Analytics and Product departments make business decisions
- support automation of various sync tasks between iOS development team and UX/UI changes - Drive integration tests coverage with Xcode UI tests

Eingesetzte Qualifikationen

iOS Entwicklung

iOS Engineer (Festanstellung)
XING AG, Hamburg
7/2016 – 5/2018 (1 Jahr, 11 Monate)
Soziale Einrichtungen

7/2016 – 5/2018


- designed and implemented premium and freemium features in the main XING iOS app, that attracted new users as well as motivated them to upgrade
- improved user experience by increasing performance in data loading, collection view scroll and background fetching
- committed to new standards like Size Classes and Auto Layout for a better experience on different screen-sizes and as well as unified and reusable view components
- engineered a reliable in-app purchase payment channel and an extensible purchase funnel, able to be used with different UI elements in A/B tests
- contributed to a safer and more flexible code base while adopting Swift
- solving security issues and closing loopholes in the payment channel for iOS Subscriptions - while collaborating with backend engineers
- supported UI/UX designers with knowledge of iOS visual design patterns and best practices
- collaborated with data science and digital analytics in order to provide reliable statistical

Eingesetzte Qualifikationen

iOS Entwicklung

iOS Developer
novomind AG, Hamburg
5/2016 – 6/2019 (3 Jahre, 2 Monate)

5/2016 – 6/2019


- engineered Beacon Based and augmented reality prototype apps targeting e-commerce
- improved app monitoring and user satisfaction by introduced A/B testing support, crash
reporting, analytics and remote config

Eingesetzte Qualifikationen

iOS Entwicklung

Software Developer
Absolute Software GmbH, Hamburg
7/2014 – 4/2016 (1 Jahr, 10 Monate)
IT & Entwicklung

7/2014 – 4/2016


- app architecture and development of social apps for Android and iOS
- integrated Facebook APIs, Google Places, Maps & Geolocation APIs, Flickr API, Amazon S3
- and many other services
- developed node.js web applications used to synchronise data with the apps
reviewed customer requirements and designed technically feasible and working solutions in
- an agile team, based on user stories, epics and tasks
ensured scalability and organised user tests, prototyped with 3rd party libraries to improve
- performance
- engineered web services meant to leverage computation on mobile devices
- contributed to all layers of a mobile app: UI, Persistence Store, Business Logic, networking, etc
- being part of an agile workflow with frequent changes in customer requirements
managing customers and their requirements, providing estimations and reports

Eingesetzte Qualifikationen

Android Entwicklung, iOS Entwicklung


Cambridge Advanced English Certificate
November 2011


Programming languages:
Swift, Objective-C, Java, JavaScript, Ruby, C#, SQL

Cocoa Touch, Cocoa(macOS), RxSwift, RxDataSource, iOS Auto Layout, Networking APIs, Core Data, Realm, SQLite, iOS StoreKit, iOS Maps and Geolocation, Firebase, Optimizely, Android Services, Facebook Graph & SDK, Google Maps SDK and Geolocation

Software Design:
Object Oriented Programming, Protocol Oriented Programming, Functional and Reactive Programming, VIPER, MVVM, Coordinator, reusable iOS components, iOS Frameworks

Other Technologies:
node.js, REST, JSON, APN, Deep linking, A/B Testing, Analytics, iOS Concurrency, Android development, NFC, macOS development, Calabash Acceptance Testing, Xcode UI interaction testing

Fastlane, Jenkins, Xcode Instruments, PhraseApp, iTunes Connect, Jira, Git, Coacoapods, Carthage, Charles Proxy

Release processes for mobile apps, Agile practices, SCRUM, Continuous Integration and Continuous Delivery, API design

Google Analytics, Firebase, Optimizely, Amazon S3, Heroku

Persönliche Daten

  • Englisch (Fließend)
  • Deutsch (Gut)
  • Rumänisch (Muttersprache)
Umkreis (bis 200 km)
  • Europäische Union
  • Schweiz
6 Jahre und 10 Monate (seit 08/2014)
6 Jahre


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