Matthias Zarzecki - iOS Developer

Q: Where is Matthias based?

Matthias is based in Berlin, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Matthias speak?

Matthias speaks the following languages: German (Advanced), English (Advanced), Spanish (Elementary), French (Elementary), Italian (Elementary), Dutch (Elementary), Polish (Elementary) .

Q: How many years of experience does Matthias have?

Matthias has at least 8 years of experience. During this time, Matthias has worked in at least 5 different roles and for 12 different companies . The average length of individual experience is 1 year and 8 months . Note that Matthias may not have shared all experience and actually has more experience.

Q: What is Matthias's latest experience?

Matthias's most recent position is iOS Developer at Allianz Versicherungen .

Q: What companies has Matthias worked for in recent years?

In recent years, Matthias has worked for Allianz Versicherungen , Calima Safety , Bitmarck , ShapedAgency , and MicroMovieMedia GmbH .

Q: Which industries is Matthias most experienced in?

Matthias is most experienced in industries like Information Technology , Food and Beverage , and Professional Services . Matthias also has some experience in Insurance , Automotive , and Telecommunication .

Q: Which business areas is Matthias most experienced in?

Matthias is most experienced in business areas like Information Technology , Product Development , and Quality Assurance .

Q: Which industries has Matthias worked in recently?

Matthias has recently worked in industries like Food and Beverage , Insurance , and Automotive .

Q: Which business areas has Matthias worked in recently?

Matthias has recently worked in business areas like Information Technology and Product Development .

Recommended expert

Berlin, Germany

Check rate

Experience

Dec 2024 - Present

1 year 5 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

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Food and Beverage, Professional Services, Insurance, Retail, and Automotive.

Information Technology

Food and Beverage

Professional Services

Insurance

Retail

Automotive

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, and Quality Assurance.

Information Technology

Product Development

Quality Assurance

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

Statistics

Experience

Total positions 12

Experience in Information Technology 2.5 y

Avg length 9 m

Longest experience 2 y 1 m

Expertise

Recent roles iOS Developer, VR & iOS Developer, Flutter Developer

Main industries Information Technology, Food and Beverage, Professional Services

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Bachelor

Profile

Created

May 2024

Last Update

July 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Matthias based?

Matthias is based in Berlin, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Matthias speak?

Matthias speaks the following languages: German (Advanced), English (Advanced), Spanish (Elementary), French (Elementary), Italian (Elementary), Dutch (Elementary), Polish (Elementary).

How many years of experience does Matthias have?

Matthias has at least 8 years of experience. During this time, Matthias has worked in at least 5 different roles and for 12 different companies. The average length of individual experience is 1 year and 8 months. Note that Matthias may not have shared all experience and actually has more experience.

What roles would Matthias be best suited for?

Based on recent experience, Matthias would be well-suited for roles such as: iOS Developer, VR & iOS Developer, Flutter Developer.

What is Matthias's latest experience?

Matthias's most recent position is iOS Developer at Allianz Versicherungen.

What companies has Matthias worked for in recent years?

In recent years, Matthias has worked for Allianz Versicherungen, Calima Safety, Bitmarck, ShapedAgency, and MicroMovieMedia GmbH.

Which industries is Matthias most experienced in?

Matthias is most experienced in industries like Information Technology, Food and Beverage, and Professional Services. Matthias also has some experience in Insurance, Automotive, and Telecommunication.

Which business areas is Matthias most experienced in?

Matthias is most experienced in business areas like Information Technology, Product Development, and Quality Assurance.

Which industries has Matthias worked in recently?

Matthias has recently worked in industries like Food and Beverage, Insurance, and Automotive.

Which business areas has Matthias worked in recently?

Matthias has recently worked in business areas like Information Technology and Product Development.

What is Matthias's education?

Matthias holds a Bachelor in Media Informatics from HTW Berlin University.

What is the availability of Matthias?

Matthias is immediately available full-time for suitable projects.

What is the rate of Matthias?

Matthias's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.