Marius Reimer-Freelance React Native Developer
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Experience
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
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
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
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
Software Engineering Intern
Siemens
- Worked on an international project in industrial automation based on C#, C++ and AngularJS
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.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, and 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
Education
University of Wisconsin-Parkside
Master of Science, Computer Science · Computer Science · Kenosha, United States
Ostfalia University
Master of Science, Computer Science · Computer Science · Wolfenbüttel, Germany
Ostfalia University
Bachelor of Science, Computer Science · Computer Science · Wolfenbüttel, Germany
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Marius is based in Wiesbaden, Germany.
Marius speaks the following languages: German (Native), English (Advanced).
Marius has at least 9 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 5 months. Note that Marius may not have shared all experience and actually has more experience.
Based on recent experience, Marius would be well-suited for roles such as: Freelance React Native Developer, Mobile Engineer, Software Engineering Intern.
Marius's most recent position is Freelance React Native Developer at German Government / SAP SE.
In recent years, Marius has worked for German Government / SAP SE, Codyo.app / EWE AG, and tonies GmbH.
Marius is most experienced in industries like Information Technology, Government and Administration, and Utilities. Marius also has some experience in Education and Manufacturing.
Marius is most experienced in business areas like Information Technology, Product Development, and Research and Development.
Marius has recently worked in industries like Information Technology, Government and Administration, and Utilities.
Marius has recently worked in business areas like Information Technology and Product Development.
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.
The availability of Marius needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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