Mobile iOS App Developer
- Verfügbarkeit einsehen
- 1 Referenz
- 95‐110€/Stunde
- 12053 Berlin
- Europa
- de | en
- 27.09.2022
Kurzvorstellung
Auszug Referenzen (1)
"Angenehmes und kompetentes Zusammenarbeiten mit Schwerpunkt RxSwift."
12/2019 – 5/2020
Tätigkeitsbeschreibung
In December 2019 I joined the app team of Sparkasse's agency S-Markt & Mehrwert GmbH to support them on one of their projects, a white label customer loyalty app they're offering to their partners, one of which is Hamburger Sparkasse's app HaspaJoker.
Through the app, customers get special offers and discounts from local partners, can book travel/concert tickets and benefit from a variety of other perks and services. The agile scrum team consisted of 5 iOS, 4 Android as well as 4 backend developers and was working predominantly remotely. Some of the work I did included refactoring and consolidating the codebase to be testable, introducing Screenshot tests, automating tasks, and implementing new features.
Technologies used
RxSwift, Fastlane, Alamofire, SwiftLint, SnapKit, MVVM, AppCenter, SwiftGen, Coordinator, Screenshot tests, Unit tests
iOS, Git, Jira, Swift (Apple)
Qualifikationen
Projekt‐ & Berufserfahrung
1/2022 – 10/2022
Tätigkeitsbeschreibung
Under the brands, Web.de, GMX, 1und1, and Mail.com, United Internet AG offers email and cloud services that are used every day by millions of users on their iPhones. The white-label app has historically grown since 2010 and as part of the 10-person team, besides adding new features to the app, I refactored legacy code and increased test coverage.
Features
Email and cloud access, compose email, email and cloud sync, news, contact, multiple account management, synchronization, notifications, premium features, ads
Technologies used
UIKit, SwiftUI, Combine, VIPER, Unit tests, UI tests, Snapshot tests, Fastlane, Cocoapods, MailCore
iOS Entwicklung, Objective-C, Swift (Apple)
3/2021 – 12/2021
Tätigkeitsbeschreibung
The Data4Life app helps users manage their health, gain new knowledge, and contribute to research.
The biggest challenge in this project was to change the app's UI from UIKit to SwiftUI during ongoing development and change the overall architecture from VIPER to Composable Architecture. This was achieved by modularizing the app into over 50 Swift packages and then gradually transforming them.
In addition to the architecture and development part, the job involved coaching the staff in Composable Architecture and SwiftUI by means of pair programming and in-depth sessions.
Features
Keep track of symptoms, participate in studies, store medical documents digitally, knowledge base
Technologies used
UIKit, SwiftUI, VIPER, Composable Architecture, Unit tests, Fastlane, SnapKit, Swift Package Manager, Sentry
iOS, iOS Entwicklung, Schulung / Coaching (allg.), Swift (Apple)
2/2021 – 12/2021
Tätigkeitsbeschreibung
After having worked on the project already in 2019/2020, I re-joined the app team of Sparkasse's agency S-Markt & Mehrwert GmbH to support them on one of their projects, a white label customer loyalty app they're offering to their partners, one of which is Hamburger Sparkasse's app HaspaJoker.
This time the job mainly involved consulting, coaching, and weekly code reviews.
iOS, iOS Entwicklung, Schulung / Coaching (allg.), Swift (Apple)
8/2020 – 10/2020
Tätigkeitsbeschreibung
12grapes GmbH is the company behind the app Bunch, an AI coach that makes it easy to learn and grow your leadership skills with bite-sized daily tips.
I joined Bunch in August 2020 to help develop new features and reduce the technical depth to make the app more performant, maintainable, and testable at the same time. To achieve this, I've built a backend with a REST API and outsourced some of the app's business logic. Furthermore, I introduced Functional Reactive Programming in an MVVM setup.
Features
Multi-step onboarding, Search, Explore Content, Gamification, User profiles, Read or listen to tips, Social sharing, Calendar integration
Technologies used
SwiftUI, Combine, MVVM, In-App Purchase Subscriptions, Fastlane, Travis CI, Unit tests, Firebase Firestore, Firebase Cloud Functions, Firebase Authentication, Firebase Cloud Storage, Google App Engine
iOS, iOS Entwicklung, Node.js, Swift (Apple), TypeScript
6/2020 – 8/2020
Tätigkeitsbeschreibung
Technologies used
SwiftUI, Combine, AVFoundation, Swift Composable Architecture, In-App Purchase Subscriptions, Fastlane, Firebase, Unit tests
iOS Entwicklung, Swift (Apple)
12/2019 – 2/2021
Tätigkeitsbeschreibung
The app enables selected users to upload single or multiple photos combined with text to a public feed, which automatically deletes the content after two days. In addition, the app allows one user to stream live videos simultaneously, which then appear in the feed. Viewers of the stream can send emoji reactions which then move across the screen for all participants to see. Besides photos, selected users can also post products for sale in the feed which are paid for via Apple Pay and can even be purchased by unregistered users.
A special feature of the app is that all actions are visible to other users in real-time. For example, if a user writes a text, other users can watch the author writing it even before it is published.
Features
Live video streaming, Live updates through WebSocket, Sign in with Apple, (Multiple) Image posting, Text posting, Photo cropping, Commenting, Mentioning users in comments
Technologies used
UIKit, WebSocket, WebRTC, Mediasoup, RxSwift, Fastlane, SnapKit, Push Notifications, Apple Pay, Stripe, MVVM, Unit tests
iOS, iOS Entwicklung, Swift (Apple)
12/2019 – 5/2020
Tätigkeitsbeschreibung
In December 2019 I joined the app team of Sparkasse's agency S-Markt & Mehrwert GmbH to support them on one of their projects, a white label customer loyalty app they're offering to their partners, one of which is Hamburger Sparkasse's app HaspaJoker.
Through the app, customers get special offers and discounts from local partners, can book travel/concert tickets and benefit from a variety of other perks and services. The agile scrum team consisted of 5 iOS, 4 Android as well as 4 backend developers and was working predominantly remotely. Some of the work I did included refactoring and consolidating the codebase to be testable, introducing Screenshot tests, automating tasks, and implementing new features.
Technologies used
RxSwift, Fastlane, Alamofire, SwiftLint, SnapKit, MVVM, AppCenter, SwiftGen, Coordinator, Screenshot tests, Unit tests
iOS, Git, Jira, Swift (Apple)
7/2019 – 12/2019
Tätigkeitsbeschreibung
Spielworks hired me to kick-start their product "Wombat" for iOS. For this greenfield project, I did both the architecture and the implementation of the beta version and later hired another developer who eventually took the project over.
The app is the first EOS wallet built for everyday use and simplifies the creation of EOS accounts through a three-step onboarding process. It automatically encrypts and stores the private key in the cloud and makes sending/receiving EOS tokens a breeze. One of the core features of the app is the DAPP Browser that acts as a proxy between DAPP and the EOS account and provides a streamlined user-interface to sign transactions.
Features
Login, EOS account creation, Send/Receive EOS tokens, sign transactions, SDK for third-party apps, Manage EOS keys, Unlock private key, Prime subscription, EOS resources overview
Technologies used
In-App-Purchases, EOS Blockchain, AES Cryptography, Sign in with Apple, Facebook, Twitter and Email, Firebase, Crashlytics, RxSwift, MVVM, Google Drive, Dropbox, Unit tests
iOS, Git, Jira, Swift (Apple)
1/2019 – 6/2019
Tätigkeitsbeschreibung
Together with another developer I’ve built the fitness video portal “My Fitness Video” for Fitness First. The project was set up with high scalability and security in mind and was built entirely with various components of Amazon Web Services (AWS). It consists of three main parts. Firstly the backend, where one of the bigger challenges was, to implement the whole payment and subscription process. Secondly the web app, a server-side rendered vue.js single page application, and thirdly the content and customer management system for administrators.
Features
Heavily mobile-optimized web app, user login, user registration with multi-step onboarding flow, reset & change password, change email, video streaming, payment integration (Wirecard bank), subscription management, voucher codes, video recommendation based on user’s behavior, training programs, campaigns, analytics, cms for static pages
Technologies used
Web app: Nuxt.js, Bootstrap, Node.js, GraphQL, Webpack, Serverless, AWS Lambda, AWS Cognito, AWS S3, AWS CloudFront, AWS Clouformation
Web app (admin cms): Vue.js, Bootstrap, GraphQL, AWS S3, AWS Cloudformation, AWS CloudFront, AWS Cognito, Webpack Backend: Node.js, AWS Lambda, GraphQL API, AWS Cognito, AWS AppSync, AWS Kinesis, AWS RDS, AWS SES
Node.js, Amazon Web Services (AWS), HTML5, JavaScript, Vue.js
1/2018 – 1/2019
Tätigkeitsbeschreibung
After having helped out Vantik as a freelancer end of 2017, I joined full-time in 2018 to build up the entire frontend stack and team. Vantik is an investment-based retirement savings product (private pension). Since Vantik is a banking product, the highest priority in all layers of the stack was security and compliance with the German federal financial supervisory authority (BaFin).
Technologies used
Customer web app: Vue.js, Bootstrap, Node.js, Webpack, AWS Cognito, AWS Cloudformation, AWS S3, AWS Lambda
Admin web app: Vue.js, Bootstrap, AWS S3, AWS Cloudformation, AWS CloudFront, AWS Cognito, Webpack Visitor website: Node.js, Express.js, Prismic.io (Headless CMS), Pug
App (iOS): Swift, UIKit, Alamofire, RxSwift, MVVM, Reactive programming
iOS, Node.js, Swift (Apple), Amazon Web Services (AWS), JavaScript, Vue.js
5/2017 – 1/2018
Tätigkeitsbeschreibung
Together with a team of developers put together by functionalaesthetics GmbH, I was working on the iOS swift app (universal - iPhone & iPad) for Boston Consulting Group’s client smile.direct, a Swiss insurance company. The app was designed to help families planning their everyday life. The main part of the app is an elaborate calendar, heavily optimized for easy user experience on both the iPad and iPhone. Furthermore, family members have profiles and can easily communicate through private messages.
Features (excerpt)
Calendar component, create & edit events, comment, animated onboarding, create & edit task lists, import calendars, sharing, push notifications, user registration & login, reset & change password, family setup, private messages, change app theme
Technologies used
Swift, UIKit, Fastlane, RxSwift, MVVM, Reactive programming, Alamofire, AlamofireImage, SnapKit, SwiftLint, Firebase, BuddyBuild, Core Text, Core Telephony, Quartz Core, AVFoundation, Core Media, Core Video
iOS, Git, Jira, Swift (Apple)
1/2016 – 5/2017
Tätigkeitsbeschreibung
Together with another app developer I’ve built the native iOS swift (universal - iPhone & iPad) app for Wine in Black, a wine e-commerce company. Due to the fact that Wine in Black is a curated shop with a limited, constantly changing assortment, the app stores all active products on the device and synchs with the server on startup so that all interactions with products such as browse, search or filter are instant and do not require a network connection.
Besides working on the iOS app, another part of the job was building a new REST API. This was necessary because the existing shop system was being replaced during the project.
Features
Push notifications, campaigns, product detail page, cart, checkout, order history, profile, filters & search, custom transitions, store country switching, user registration & login
Technologies used
App: Swift, UIKit, iAd, Core Image, Fabric, Fastlane, OneSignal, Crashlytics, Analytics
Backend: PHP, Spryker Commerce OS, MySQL, Integration tests
mySQL, iOS, Swift (Apple), Spryke
5/2014 – 12/2015
Tätigkeitsbeschreibung
For universeiscool, I built the social image sharing app FOYER. It enables the user to combine text and photos into a story and a layout algorithm takes care that stories look unique and good on any device. An integrated image editor provides an easy way to get the most out of the pictures and social features such as share, like and comment make sure that stories get the attention they deserve. The social feed channelizes the stories created or shared by followed users and the discover section in the app exposes stories of users from outside the user’s network.
Features
Login, registration, animated onboarding flow, story page, story editor, image editor and picker, social feed, like, share, comment story, discover section (stories & users), profile, push notifications, web app for cross-platform use
Technologies used
App: Swift & Objective-C, UIKit, Core Image, Core Graphics, Core Animation, Alamofire, MVC, Unit tests
Web: Angular.js, Image proxy
Backend: Node.js, REST, Koa.js, AWS S3, AWS Lambda, AWS Simple Notification Service, AWS Simple Email Service, Neo4j Graph Database, Integration tests
Node.js, Objective-C, Swift (Apple), Amazon Web Services (AWS), AngularJS
Ausbildung
Hochschule für Technik und Wirtschaft, Berlin
Düsseldorf
Über mich
In terms of project setup, I enjoy both: being part of a team that drives the development of an app as well as developing apps independently by myself. Thanks to my background as a UX designer and my experience as a backend developer, I also enjoy to driving projects forward autonomously.
When working with clients in my opinion communication is key – I think it is essential to continuously communicate the current state of development and discuss potential problems. Usually, I have regular check-ins with my clients. This is important to check that the project is moving in the right direction and to ensure that the client is always up to date thus potential misunderstandings can be identified very early on.
Weitere Kenntnisse
Done in the past: Serverless, Vue.js, Nuxt.js, Bootstrap, Node.js, GraphQL, Webpack, AWS Lambda, AWS Cognito, AWS S3, AWS CloudFront, AWS Clouformation, AWS AppSync, AWS Kinesis, AWS RDS, AWS SES, AWS SNS
Persönliche Daten
- Deutsch (Muttersprache)
- Englisch (Fließend)
- Europäische Union
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