Senior Software Engineer iOS & Frontend

Design of a new web application interface in the central sales software for all sales agencies of the insurance company. Management of the team regarding the translation of business requirements, technical feasibility up to the UX prototype. Interactive prototype for desktop in Figma. Usability evaluation on the target group with 20 participants. Evaluation of the data and iterative improvement of the prototype. Creation of a development basis for programmatic implementation. UI design for HTML/CSS and JavaScript specifics.

The comdirect photoTAN app for iOS enables quick and secure authentication of transactions through an innovative photoTAN process. Users can scan TANs using the camera of their iOS device, which are necessary for transfers and other banking operations. Users: > 1 million

Written in native Swift. Technical migration from UIKit to SwiftUI. App-wide MVVM and Coordinator design pattern. Declarative/reactive programming using Apples Combine framework. API integrations and data structures with JSON. Documented Clean Code. Continuous integration with Git and Jenkins. Unit Tests high coverage with XCTest. Agile project setup according to Scrum.

Team size: 15 (4 iOS, 4 Android, 1 Design, 4 Tester, 1 PO, 1 SM)

The Corona-Warn-App is an open source eHealth app that helps trace infection chains of SARS-CoV-2 (which can cause COVID-19) in Germany. The app is based on technologies with a decentralized approach and notifies users if they have been exposed to SARS-CoV-2. Users: > 10 million

Written in native Swift using UIKit framework. App-wide MVVM and Coordinator design pattern. Partial reactive programming using Apples Combine framework, Exposure Notification API. Provide vaccination certificates. Absolutely Clean Code documentation and clarity for high maintainability and extensibility. High test Unit Tests and UI Tests coverage with XCTest. Using Git with GitHub CI as an Open Source project. Agile project setup according to KANBAN.

Team size: 27 (4 iOS, 4 Android, 3 Backend, 2 Design, 8 Tester, 2 Arch, 1 Sec, 1 PO, 2 PL)

iOS module TK-Safe contains the Electronic Health Record (dt. ePA) that serves as a digital health record for patients in Germany. It allows to securely store and manage their medical data, including doctor’s visits, prescriptions or diagnoses. Users and healthcare providers have quick access to medical informations. Users: 2+ million

Native Swift using UIKit framework. App-wide MVVM and Coordinator design pattern. Async chaining with PromiseKit framework. Scanbot SDK integrated. Dynamic Typing and Voice Over support for accessibility, i18n ready. Documented Clean Code. Version control with Git. 95+% Unit Tests and UI Tests coverage with XCTest. Agile project setup according to Scrum.

Lang & Team 🇬🇧 27 (10 iOS, 10 Android, 4 Design, 2 Scrum Master, 2 TO, 1 PO, 1 PL)

Mobile, Identity and Access iOS Web

Introducing a new IoT solution for car sharing and access. The native iOS app was written in Swift using MVVM pattern for comfortable unit testing with XCTest and ReactiveCocoa for a highly reactiveness. The app could share the car location via GPS. Authorised persons were able to get access to released vehicles, by a push notification and bluetooth based virtual key exchange from Valeo SDK. The web control center was written in Angular with Typescript. The distributed team worked in an agile project setup according to SCRUM. I built also a convenient CI/CD with Gitlab, fastlane and Testflight, but also advised for iOS specific usability approaches.

Allianz Gesundheits-App iOS

Development of the new iOS app for the privately healthcare insured persons. The native app was built from scratch and written in Swift, first by apply MVP pattern and later refactored to MVVM. We worked in a pair programming and TDD approach. To that we used XCTest to write Unit Tests and UI Tests. Almost all features were programmed reactive by using RxSwift. We introduced smart document scanning with automatic edge detection by using OpenCV framework, but also video authentication and worked in two-weekly SCRUM sprints. With our RESTful backend we developed also telemedicine features, like sharing photos of injuries to a remote doctor system.

Project Lang + Team 🇩🇪 🇬🇧 12 | 4 iOS, 2 Android, 2 Backend, 1 Design, 1 Infra, 1 Scrum M., 1 PO

Role / Highlights iOS Developer Swift, RxSwift, Push Notifications, RESTful API, OpenCV, Convenient Document Scanning, Video Authentication, Git, Pair Programming, SCRUM, Telemedicine, eHealth, Healthcare

Allianz Kranken Tarifwechselberater Web

Development of a new web app for the Meine Allianz portal, where the users will be able to change their preferences regarding their own healthcare insurance products. In weekly sprints we developed the app from scratch, based on AngularJS and Javascript and using tools like Grunt.js, Bower, and Node.js.

Role / Highlights Frontend Developer AngularJS, Javascript, RESTful API, Git, SCRUM