Malte Schonvogel
Freelance iOS Developer
Experience
Jan 2021 - Oct 2022
10 months Germany
Freelance iOS Developer
United Internet AG
- 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
Mar 2021 - Dec 2021
10 months Germany
Freelance iOS Developer
D4L data4life gGmbH
- 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
- Combine
- VIPER
- Composable Architecture
- Unit tests
- Fastlane
- SnapKit
- Swift Package Manager
- Sentry
Feb 2021 - Dec 2021
11 months Germany
Freelance iOS Developer
Sparkasse S-Markt & Mehrwert GmbH
- 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.
Aug 2020 - Oct 2020
3 months Germany
Freelance iOS Developer
12grapes GmbH
- 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
Jun 2020 - Aug 2020
3 months Germany
Freelance iOS Developer
sonamedic GmbH
- Technologies used
- SwiftUI
- Combine
- AVFoundation
- Swift ComposableArchitecture
- In-App Purchase Subscriptions
- Fastlane
- Firebase
- Unit tests
Dec 2019 - May 2020
6 months Germany
Freelance iOS Developer
Sparkasse S-Markt & Mehrwert GmbH
- 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
- XCode
- RxSwift
- Fastlane
- Alamofire
- SwiftLint
- SnapKit
- MVVM
- REST-Api
- AppCenter
- SwiftGen
- Coordinator
- Snapshot tests
- Unit tests
- GIT
- Scrum
Nov 2019 - Feb 2021
1 year 4 monthsFreelance iOS Developer
Splay, Inc.
- 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
Jul 2019 - Nov 2019
5 months Germany
Freelance iOS Swift Developer
Spielworks GmbH
- 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
Jan 2019 - Jun 2019
6 months Germany
Freelance App and Backend Developer
Fitness First Germany GmbH (via anywhereinside UG)
- 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 Cloudformation
- 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
Jan 2018 - Jan 2019
1 year 1 month Germany
Head of Frontend Development (Vue.js / iOS Swift)
Vantik GmbH
- 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, highest priority in all layers of the stack was security and compliance with the German federal financial supervisory authority (BaFin).
- Stack
- Customer web app: BaFin compliant multi-step user registration, deposit & withdraw money, payment history, multi-factor authentication, change linked bank account, tax exemption settings, account settings, account balance, customer login, reset & change password
- Admin web app: User management, payment management, voucher codes
- Visitor website: Static website generator fed by a headless CMS (Prismic) and hosted on AWS S3
- App (iOS): Customer login, account balance, deposit & withdraw, account settings
- 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
May 2017 - Jan 2018
9 monthsFreelance iOS Swift Developer
Boston Consulting Group (via functionalaesthetics GmbH)
- Together with a team of developers put together by functionalaesthetics, 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
Dec 2015 - May 2017
1 year 6 months Germany
iOS Swift Developer
Wine in Black GmbH
- 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 syncs 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
Jan 2015 - Dec 2015
1 year Germany
iOS Swift Developer
universeiscool UG
- 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
May 2014 - Sep 2014
5 months Germany
iOS Objective-C Developer
Deutschlandradio
- During studies, I was working on the media library app for Deutschlandradio Wissen.
- Features
- Login
- Registration
- Category overview
- Article detail page
- Audio streaming
- Starring favorite articles
- Push notifications
- Technologies used
- Objective-C
- UIKit
- MVC
- Core Animation
- Core Image
- AVFoundation
- AFNetworking
Feb 2011 - Apr 2012
1 year 3 months Germany
UX/UI Designer
sipgate GmbH
Aug 2008 - Feb 2011
2 years 7 months Germany
Dual Apprenticeship (Media Design)
sipgate GmbH
Languages
German
Native
English
Advanced
Education
Apr 2012 - Mar 2015
University of Applied Sciences (HTW) Berlin
Applied Computer Science · Berlin, Germany
Aug 2008 - Feb 2011
Albrecht-Dürer-Schule
Dual apprenticeship – Technical College · Media Design · Düsseldorf, Germany
Sep 1999 - Jun 2008
Marie-Curie Gymnasium
A levels / Abitur · Düsseldorf, Germany
Similar Freelancers
Discover other experts with similar qualifications and experience