Malte Schonvogel
Freelance iOS Developer
Experience
Freelance iOS Developer
United Internet AG
- Under the brands Web.de, GMX, 1und1, and Mail.com, offers email and cloud services used daily by millions on iPhones.
- As part of a 10-person team, added new features, 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.
Freelance iOS Developer
D4L data4life gGmbH
- Developed the Data4Life app to help users manage health, gain knowledge, and contribute to research.
- Migrated UI from UIKit to SwiftUI and architecture from VIPER to Composable Architecture by modularizing into over 50 Swift packages.
- Coached staff in Composable Architecture and SwiftUI through 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.
Freelance iOS Developer
Sparkasse S-Markt & Mehrwert GmbH
- Supported a white-label customer loyalty app project (HaspaJoker) for Hamburger Sparkasse, focusing on consulting, coaching, and weekly code reviews.
Freelance iOS Developer
12grapes GmbH
- Developed new features and reduced technical debt for Bunch, an AI coach app, by building a backend REST API and outsourcing business logic.
- 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.
Freelance iOS Developer
sonamedic GmbH
- Developed iOS app using SwiftUI and Composable Architecture.
- Technologies used: SwiftUI, Combine, AVFoundation, Swift ComposableArchitecture, In-App Purchase Subscriptions, Fastlane, Firebase, Unit tests.
Freelance iOS Developer
Sparkasse S-Markt & Mehrwert GmbH
- Supported a white-label customer loyalty app (HaspaJoker) offering special offers, discounts, travel/concert booking, and other perks.
- Refactored and consolidated codebase for testability, introduced screenshot tests, automated tasks, and implemented new features in an agile scrum team.
- Technologies used: Xcode, RxSwift, Fastlane, Alamofire, SwiftLint, SnapKit, MVVM, REST API, AppCenter, SwiftGen, Coordinator, Snapshot tests, Unit tests, Git, Scrum.
Freelance iOS Developer
Splay, Inc.
- Built an app enabling selected users to post photos and text to a public feed with two-day auto-deletion and live video streaming with real-time emoji reactions.
- Enabled posting products for sale with Apple Pay and real-time visibility of user actions.
- Features: Live video streaming, live updates through WebSocket, Sign in with Apple, 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.
Freelance iOS Swift Developer
Spielworks GmbH
- Architected and implemented the beta version of Wombat, the first EOS wallet app for everyday use, then hired a developer to continue the project.
- Simplified EOS account creation, encryption, cloud storage of private keys, and DApp browser integration for seamless transaction signing.
- 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.
Freelance App and Backend Developer
Fitness First Germany GmbH (via anywhereinside UG)
Built the ‘My Fitness Video’ portal with high scalability and security using AWS components.
Three main parts:
Backend with payment and subscription processes.
Mobile-optimized web app (vue.js) for users.
Content and customer management system for administrators.
Features: User login, registration with multi-step onboarding, password and email management, video streaming, payment integration (Wirecard), subscription management, voucher codes, video recommendations, 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.
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.
Head of Frontend Development
Vantik GmbH
Joined full-time to build the entire frontend stack and team for a BaFin-compliant investment-based retirement savings product.
Stack components:
Customer web app with multi-step registration, transactions, account settings, multi-factor authentication.
Admin web app for user and payment management, voucher codes.
Visitor website using a headless CMS and AWS hosting.
iOS app for customer account management and transactions.
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, Pug.
App (iOS): Swift, UIKit, Alamofire, RxSwift, MVVM, Reactive programming.
Freelance iOS Swift Developer
Boston Consulting Group (via functionalaesthetics GmbH)
Developed a universal iOS app for Swiss insurance client Smile.Direct to help families plan everyday life with an optimized calendar and private messaging.
Features: Calendar component, create and edit events, comments, animated onboarding, task lists, calendar import, sharing, push notifications, user registration and login, password management, family setup, private messages, theme customization.
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 Swift Developer
Wine in Black GmbH
- Built the universal iOS app for a curated wine e-commerce company, storing and syncing products locally for instant interactions.
- Developed a new REST API to replace the existing shop system.
- Features: Push notifications, campaigns, product detail pages, cart, checkout, order history, profile, filters and search, custom transitions, store country switching, user registration and login.
- Technologies used: App: Swift, UIKit, iAd, Core Image, Fabric, Fastlane, OneSignal, Crashlytics, Analytics; Backend: PHP, Spryker Commerce OS, MySQL, Integration tests.
iOS Swift Developer
universeiscool UG
- Built FOYER, a social image sharing app that combines text and photos into stories with automated layout and integrated image editor.
- Implemented social features: share, like, comment, discover section, and web app for cross-platform use.
- Features: Login and registration, animated onboarding, story page, story editor, image editor and picker, social feed, like, share, comment, discover section, profile, push notifications.
- 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, SNS, SES, Neo4j, Integration tests.
iOS Objective-C Developer
Deutschlandradio
- Developed the media library app for Deutschlandradio Wissen during studies.
- Features: Login and registration, category overview, article detail page, audio streaming, favorite articles, push notifications.
- Technologies used: Objective-C, UIKit, MVC, Core Animation, Core Image, AVFoundation, AFNetworking.
UX/UI Designer
sipgate GmbH
Dual Apprentice (Media Design)
sipgate GmbH
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (3.5 years), Telecommunication (3.5 years), Banking and Finance (2.5 years), Media and Entertainment (2.5 years), Retail (1.5 years), and Food and Beverage (1.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Product Development (9.5 years), Information Technology (8.5 years), Marketing (2.5 years), and Quality Assurance (2 years).
Languages
Education
University of Applied Sciences (HTW) Berlin
Studies of applied computer science, area of concentration: mobile applications · Applied computer science · Berlin, Germany
Albrecht-Dürer-Schule
Dual apprenticeship, Mediadesign – Technical College · Mediadesign · Düsseldorf, Germany
Marie-Curie Gymnasium
A levels / Abitur · Düsseldorf, Germany
Profile
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