Marius Reimer - Freelance React Native Developer

Q: Where is Marius based?

Marius is based in Wiesbaden, Germany .

Q: What languages does Marius speak?

Marius speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Marius have?

Marius has at least 8 years of experience. During this time, Marius has worked in at least 4 different roles and for 6 different companies . The average length of individual experience is 1 year and 4 months . Note that Marius may not have shared all experience and actually has more experience.

Q: What is Marius's latest experience?

Marius's most recent position is Freelance React Native Developer at German Government / SAP SE .

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

In recent years, Marius has worked for German Government / SAP SE , Codyo.app / EWE AG , and tonies GmbH .

Q: Which industries is Marius most experienced in?

Marius is most experienced in industries like Information Technology , Government and Administration , and Utilities . Marius also has some experience in Education and Manufacturing .

Q: Which business areas is Marius most experienced in?

Marius is most experienced in business areas like Information Technology , Product Development , and Research and Development .

Q: Which industries has Marius worked in recently?

Marius has recently worked in industries like Information Technology , Government and Administration , and Utilities .

Q: Which business areas has Marius worked in recently?

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

Recommended expert

Wiesbaden, Germany

Experience

May 2023 - Present

2 years 11 months

Germany

Freelance React Native Developer

German Government / SAP SE

React Native development and consulting (KulturPass app) using TypeScript, Redux and RTK Query
Fully open sourced on GitHub
Project of the Federal Government and SAP to promote culture and youth

Sep 2021 - May 2022

9 months

Germany

Freelance React Native Developer

Codyo.app / EWE AG

React Native development and consulting (codyo app) using JavaScript, Redux, react-navigation, Git and AWS
Responsible for the full app development cycle
Worked in two-week Scrum sprints

Apr 2021 - Jan 2023

1 year 10 months

Germany

Freelance React Native Developer

tonies GmbH

React Native development and consulting (mytonies app) using TypeScript, Java and Swift with a focus on MobX State Tree, GitLab, react-navigation and react-native-reanimated
Led architectural decisions and development of a new version 2 app
Worked in Kanban and two-week sprints

Sep 2018 - Dec 2020

2 years 4 months

Hamburg, Germany

Mobile Engineer

Nect GmbH

Developed iOS and Android apps (React Native) for fully automatic biometric identity verification, the first in the German market
Developed platform native code in Java, Objective-C, Kotlin and Swift and contributed to several open source projects
Developed internal and external web tools (React, Preact) and SDKs for Android and iOS

Nov 2017 - Apr 2018

6 months

Princeton, United States

Software Engineering Intern

Siemens

Worked on an international project in industrial automation based on C#, C++ and AngularJS

Feb 2017 - Oct 2017

9 months

Research Employee

Ostfalia University

Developed a collision prevention AI for the Anki SDK using Java
Supported professor’s work in Java EE

Industry Experience

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

Experienced in Information Technology, Government and Administration, Utilities, Manufacturing, and Education.

Information Technology

Government and Administration

Utilities

Manufacturing

Education

Business Area Experience

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

Experienced in Information Technology, Product Development, and Research and Development.

Information Technology

Product Development

Research and Development

Summary

Software Engineer and expert in React Native as well as experienced in React frontends. Currently developing the KulturPass app for the federal government. Last big project was the development of the mytonies® app. Looking for exciting projects (app, frontend, backend). Quality awareness and reliability are my biggest strengths

Skills

Typescript, Javascript, Objc, C#, Java, Kotlin, Dart, Rust
React Native, React, Flutter, Firebase, Android, Ios, Xcode, Unix, Git, Ci/cd

Languages

German

Native

English

Advanced

Education

Aug 2015 - Dec 2015

University of Wisconsin-Parkside

Master of Science, Computer Science · Computer Science · Kenosha, United States

Sep 2011 - Sep 2017

Ostfalia University

Master of Science, Computer Science · Computer Science · Wolfenbüttel, Germany

Sep 2011 - Sep 2017

Ostfalia University

Bachelor of Science, Computer Science · Computer Science · Wolfenbüttel, Germany

Statistics

Experience

Total positions 6

Experience in Information Technology 7.5 y

Avg length 1 y 5 m

Longest experience 2 y 10 m

Global Experience

Countries worked in 2 (Germany, United States)

Primary country Germany

Expertise

Recent roles Freelance React Native Developer, Mobile Engineer, Software Engineering Intern

Main industries Information Technology, Government and Administration, Utilities

Main business areas Information Technology, Product Development, Research and Development

Qualifications

Highest degree Master

Profile

Created

February 2024

Last Update

February 2026

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Frequently asked questions

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

Where is Marius based?

Marius is based in Wiesbaden, Germany.

What languages does Marius speak?

Marius speaks the following languages: German (Native), English (Advanced).

How many years of experience does Marius have?

Marius has at least 8 years of experience. During this time, Marius has worked in at least 4 different roles and for 6 different companies. The average length of individual experience is 1 year and 4 months. Note that Marius may not have shared all experience and actually has more experience.

What roles would Marius be best suited for?

Based on recent experience, Marius would be well-suited for roles such as: Freelance React Native Developer, Mobile Engineer, Software Engineering Intern.

What is Marius's latest experience?

Marius's most recent position is Freelance React Native Developer at German Government / SAP SE.

What companies has Marius worked for in recent years?

In recent years, Marius has worked for German Government / SAP SE, Codyo.app / EWE AG, and tonies GmbH.

Which industries is Marius most experienced in?

Marius is most experienced in industries like Information Technology, Government and Administration, and Utilities. Marius also has some experience in Education and Manufacturing.

Which business areas is Marius most experienced in?

Marius is most experienced in business areas like Information Technology, Product Development, and Research and Development.

Which industries has Marius worked in recently?

Marius has recently worked in industries like Information Technology, Government and Administration, and Utilities.

Which business areas has Marius worked in recently?

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

What is Marius's education?

Marius holds a Master in Computer Science from University of Wisconsin-Parkside, a Master in Computer Science from Ostfalia University and a Bachelor in Computer Science from Ostfalia University.

What is the availability of Marius?

Marius is immediately available for suitable projects.

What is the rate of Marius?

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