Recommended expert

Matthias Zarzecki

iOS Developer

Matthias Zarzecki
Berlin, Germany

Experience

Dec 2024 - Present
1 year 2 months

iOS Developer

Allianz Versicherungen

  • Developed the Allianz health app
  • Focus: iOS, Jenkins, A11Y, SonarQube, Fastlane, Quick, Nimble, ViewInspector, XCUI
Sep 2024 - Mar 2025
7 months

iOS Developer

Calima Safety

  • Developed an Apple Watch app for workplace safety
  • Focus: iOS, watchOS, WatchKit, Falling Down API, Sentry, Bluetooth, IoT
Sep 2024 - Dec 2024
4 months

iOS Developer

Bitmarck

  • Developed the Bitmarck white-label app for 30 health insurance companies
  • Focus: iOS, Jenkins, AppCenter, Firebase, A11Y, NFC, CryptoKit, Protobuf, SonarQube
Sep 2024 - Oct 2024
2 months

VR & iOS Developer

ShapedAgency

  • Built an augmented reality app for Apple Vision Pro
  • Focus: iOS, visionOS, RealityKit
Jul 2024 - Sep 2024
3 months

Flutter Developer

MicroMovieMedia GmbH

  • Developed the QR code scanner
  • Created an audio streaming solution
  • Focus: Flutter, Dart, GoRouter, QR code scanning
Apr 2024 - May 2024
2 months

VR & iOS Developer

Unit9

  • iOS Native Lead of multiple Unity developers for a virtual reality app for Apple Vision Pro
  • Focus: visionOS, Apple Vision Pro, RealityKit
Sep 2023 - Apr 2024
8 months

Senior iOS Developer

STIHL

  • Developed the Stihl Connected Bluetooth app
  • Focus: CoreBluetooth, IoT, Combine, UIKit, Microsoft App Center, GitHub Actions, Azure DevOps, SwiftUI, SonarQube
Jul 2023 - Sep 2023
3 months

Senior iOS Developer

KptnCook

  • Worked on a database technology update
  • Worked on the transition from UIKit to SwiftUI
  • Got featured in the Apple App Store
  • Focus: UIKit and SwiftUI architecture transition, widgets, Realm
May 2022 - Feb 2023
10 months

Senior iOS Developer

Chrono24

  • Developed the Chrono24 app
  • Worked on the augmented reality watch scanner
  • Focus: DIKit, data source & repository architecture, UIKit & SwiftUI architecture transition, modularization, async/await, Apple Watch, HealthKit
Jun 2021 - Aug 2022
1 year 3 months

Senior iOS Developer

OneCode (aka Red Android)

  • Developed an internal fleet management app for Deutsche Telekom
  • Significantly increased unit test coverage
  • Developed the Bosch Flow e-bike app
  • Integrated Apple Health into the Bosch Flow e-bike app
  • Developed Apple Watch integration
  • Developed Mapbox features
  • Worked in an SAFe setup with 11 other Scrum teams
  • Built the CI/CD infrastructure for iOS and Android from scratch for the Unu Motors eMoped app
  • Focus: SwiftUI, Combine, Fastlane, Bitrise, Mapbox, Apple HealthKit, WatchKit, Visual Studio App Center, Lottie animations, XCUITest
Jun 2019 - May 2021
2 years

Flutter Developer

Oetker Digital & All About Cake

  • Developed the Backen.de App
  • Developed the Juit App in Flutter, with Bluetooth functionality
  • Reduced deployment and build times by 90%, and codebase size by 73%
  • Was featured in the Apple App Store
  • Developed the CI/CD system using Bitrise
  • Focus: Swift, SwiftUI, Combine, Fastlane, Bitrise, Firebase, Realm, Bluetooth, Flutter, IoT, A11Y
Apr 2017 - May 2019
2 years 2 months

Developer

IBM iX

  • Developed multiple iOS apps with Swift, CoreML & MapBox
  • Developed the CI/CD system for dozens of apps with Jenkins, Fastlane & SonarQube
  • Developed a UI testing solution for multiple projects
  • Created an augmented reality app with Unity & Vuforia
  • Focus: Jenkins, Fastlane, MapBox, Vuforia, CoreML, SonarQube, Flutter, Dart, XCUI

Summary

  • 10+ years of experience, 30+ projects developed, 6 VR/XR projects
  • Worked for: IBM, Dr. Oetker, Volkswagen, Telekom, Techniker Krankenkasse
  • Award-winning developer
  • Mobile CI/CD expert, Fastlane open source contributor
  • Committed to SwiftUI from day one
  • Active in the iOS developer community, Fastlane contributor
  • Has own iOS development YouTube channel (matthias_code)
  • Has own successful apps in the store (Basketball Standings, Bluetooth Developer)
  • Own apps with 40,000+ downloads and in the Top 2 on App Store charts

Skills

Development

  • Ios
  • Swift
  • Swiftui
  • Uikit
  • Xcui
  • Rest Apis
  • Fastlane
  • Shellscript
  • Flutter
  • Dart
  • Bitrise
  • Jenkins
  • Ar
  • Vr
  • Healthkit
  • Widgetkit
  • Watchos
  • Graphql
  • Arkit
  • The Composable Architecture (Tca)
  • Bluetooth
  • Iot
  • Avfoundation
  • Visionos
  • Apple Vision Pro
  • Realitykit
  • Firebase
  • Kotlin Multiplatform
  • A11y

Project Management

  • Leadership
  • Agile & Lean Methodology
  • Scrum
  • User-centric Design
  • Rapid Prototyping
  • Kanban
  • Architectural Planning
  • Public Speaking
  • Take Responsibility For Own Work And That Of Team Members
  • Safe

Languages

German
Advanced
English
Advanced
Spanish
Elementary
French
Elementary
Italian
Elementary
...and 2 more

Education

Oct 2012 - Jun 2016

HTW Berlin University

Bachelor of Science in Media Informatics, specialized in iOS apps & virtual reality · Media Informatics · Berlin, Germany

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