Markus Steffen - Fullstack-Developer

Q: Where is Markus based?

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

Q: What languages does Markus speak?

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

Q: How many years of experience does Markus have?

Markus has at least 17 years of experience. During this time, Markus has worked in at least 12 different roles and for 13 different companies . The average length of individual experience is 1 year and 4 months . Note that Markus may not have shared all experience and actually has more experience.

Q: What is Markus's latest experience?

Markus's most recent position is Fullstack-Developer at VRM Digital / RYZE .

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

In recent years, Markus has worked for VRM Digital / RYZE and My IT and Event Management Company .

Q: Which industries is Markus most experienced in?

Markus is most experienced in industries like Information Technology , Professional Services , and Media and Entertainment . Markus also has some experience in Education , Healthcare , and Government and Administration .

Q: Which business areas is Markus most experienced in?

Markus is most experienced in business areas like Information Technology , Project Management , and Marketing . Markus also has some experience in Product Development , Operations , and Customer Service .

Q: Which industries has Markus worked in recently?

Markus has recently worked in industries like Information Technology , Professional Services , and Media and Entertainment .

Q: Which business areas has Markus worked in recently?

Markus has recently worked in business areas like Information Technology , Marketing , and Project Management .

Recommended expert

Mainz, Germany

Check rate

Experience

Sep 2020 - Dec 2025

5 years 4 months

Mainz, Germany

Remote

Fullstack-Developer

VRM Digital / RYZE

Development and maintenance of a news portal CMS with interfaces.
PHP development with HTML, CSS, SCSS, JavaScript, MySQL, Laravel, documentation of the interfaces and the system.
Further development of the SSO system based on Laravel with a large API and connections to AWS, SAP, ERPS.
Reorganisation and development of the news portals on the basis of a publish platform, services and interfaces to Google, Facebook, Twitter, SSO, SAP technical based on NodeJS with TypeScript and AWS.
Technologies: PHP, Laravel, MySQL, JavaScript, Vue.js, NodeJS, TypeScript, jQuery, CSS, SCSS, SASS, Unix, Jira, Confluence, Git, Apache, Nginx, AWS.

Apr 2019 - Apr 2020

1 year 1 month

Frankfurt, Germany

Remote

Lead-Developer / Fullstack-Developer

Computer Futures / Sabre Technologie

Further development and maintenance of a large hotel website with its own CMS and interfaces to various booking systems.
PHP development with HTML, CSS, SCSS, JavaScript, Vue.js, Yii, Caliban, MySQL, Angular, Bootstrap, documentation of the interfaces and the CMS system.
Conversion of the entire project from PHP 5.6 to 7.2 and conversion of all database access to PDO-MySQL for security reasons.
Advice on the technical direction of projects for new customers.
Technologies: PHP, Doctrine, MySQL, JavaScript, Vue.js, Caliban, jQuery, Angular, CSS, SCSS, Bootstrap, Unix, Jira, Confluence, Rally, Git, Apache, Nginx, AWS.

May 2017 - Oct 2018

1 year 6 months

Munich, Germany

Hybrid

Project Management / Fullstack Developer

weeBusiness GmbH

Further development of various websites using PHP with Zend, Doctrine, MySQL and Typo3 development and maintenance with HTML, PHP, JavaScript, CSS, Angular, Bootstrap.
New development of several websites with APIs using Java, Spring Framework, Thymeleaf, interfaces and test scenario definition, development and documentation.
Development of a Contentful interface connection with integrated multi-language capability.
Technologies: PHP, Java, Zend 3, Symfony, Spring, Doctrine, MySQL, JavaScript, jQuery, Angular, CSS, Bootstrap, Thymeleaf, SQL, Unix, Jira, Confluence, Git, Apache, Nginx, JBoss, Google Cloud, AWS, Route53, Bamboo, Jenkins 2, Elastic Search, JUnit, UML, OOA/OOD.

Sep 2016 - Dec 2016

4 months

Munich, Germany

On-site

IT Consultant Support Admin Databases

Atos IT Solutions and Services GmbH / Telefonica Deutschland

Migration of a legacy system and numerous databases, monitoring, error analysis, troubleshooting and second-level support.
Technologies: SQL, Unix, Oracle, Jira, Confluence, Remedy, Apache Tomcat.

Jul 2016 - Jul 2016

1 month

Mainz, Germany

On-site

Backend application developer

MPM

Conception, planning and development of a module for analysing orders and order processes.
Object-oriented PHP development with Zend 2 and Doctrine.
Technologies: PHP, Zend 2, Doctrine, HTML, CSS, JavaScript, Angular, MySQL, MSSQL, Apache Server, Excel, CSV, Agile software development, UML, OOA/OOD.

Dec 2015 - Jun 2016

7 months

Product developer

Deutscher Landwirtschaftsverlag GmbH

Object-oriented web development with Zend framework including analysis, specification, implementation and documentation in wiki and source code.
Agile software development with Scrum.
Technologies: Zend framework, SCSS, CSS, HTML, PHP, JavaScript, jQuery, Eclipse, MySQL, Grunt, SOAP, XML, web services, UML, OOA/OOD.

Dec 2014 - Nov 2015

1 year

Operations Expert Applications + Second Level IT

univativ GmbH

Support and further development of web applications in cooperation with specialist departments and IT service providers.
Support and monitoring of the database.
Technologies: PHP, Java, .NET, ASP.NET, C#.NET, XML, MySQL, Oracle, HTML, CSS, Apache, Tomcat, Microsoft IIS.

Jan 2014 - Mar 2014

3 months

Mainz, Germany

Backend application developer

Institute of Computer Science, University of Mainz

Conception, planning and development of a module for the automatic validation of programme code for use in exercises and tutorials.
Technologies: HTML, PHP, CSS, MySQL, Apache Server, UML, OOA/OOD.

Nov 2013 - Dec 2014

1 year 2 months

Research assistant

German Bundestag

Setting up and managing office IT in the constituency office, correspondence, transport services, accompanying groups of visitors to Berlin.

Dec 2011 - Nov 2014

3 years

Mainz, Germany

User administration & support

Campus Mainz e.V.

Support for the development and user administration of the Campus Mainz platform for communication and information procurement at the University of Mainz.
Technologies: Typo3, JSON, XML, PHP, HTML, CSS, Java, C#.NET.

Jun 2011 - Jul 2013

2 years 2 months

Mainz, Germany

Cultural Affairs Officer

General Student Committee at Johannes Gutenberg University Mainz

Organization of small and large events, personnel management, design and layout of posters, correspondence with GEMA and the public order office, booking and supporting artists, setup and operation of event technology.
Technologies: Photoshop, InDesign, Illustrator.

Mar 2010 - Dec 2011

1 year 10 months

Mainz, Germany

IT Support

University Medical Center Mainz

Complete IT support for the Institute of Immunology, including hardware replacement, documentation, inventory, installation instructions, ordering hardware and software, website support, and creating intranet pages.
Design and implementation of a new Apple server with user and document management, setup of a RAID system for data backup.
Technologies: HTML, PHP, Java, CSS, Open Directory, FTP, SSH, LDAP, SMB, AFP.

Jan 2009 - Present

17 years 4 months

Mainz, Germany

Owner and Managing Director / Fullstack Developer / Backend Developer

My IT and Event Management Company

Further development of various websites with object-oriented PHP using Zend, Symfony, and Doctrine.
Other tasks: setting up IT networks, installing hardware and software, social media support and consulting, event support, staffing for events, managing project teams, coordinating service providers.
Technologies: PHP, Zend 2, Symfony, Doctrine, MySQL, JavaScript, jQuery, JUnit, CSS, Bootstrap, SQL, Unix, Jira, Confluence, Bitbucket, GitHub, GitLab, Apache, Agile software development, UML, OOA/OOD.

Industry Experience

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

Experienced in Information Technology, Professional Services, Media and Entertainment, Education, Healthcare, and Tourism.

Information Technology

Professional Services

Media and Entertainment

Education

Healthcare

Tourism

Business Area Experience

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

Experienced in Information Technology, Project Management, Marketing, Product Development, Operations, and Customer Service.

Information Technology

Project Management

Marketing

Product Development

Operations

Customer Service

Summary

I am a Fullstack Developer with extensive experience in designing and maintaining web applications across various industries. I have built and optimized CMS, news portals, and SSO systems, working with PHP, Laravel, JavaScript, and MySQL among others. I focus on delivering reliable, readable, and scalable code with attention to security and efficiency.

I enjoy solving technical challenges and simplifying complexity through clear documentation and thoughtful design. My background spans from developing smooth user interfaces to integrating multiple systems and APIs, ensuring robust solutions that drive digital growth and innovation.

Skills

Focus On Object-oriented Web Development With

Php 4,5,7,8, Java, Typescript
Html, Mysql, Css, Javascript, Jquery, Angular, Rest, Soap
Nodejs, Vuejs, Typescript, Graphql, Laravel
Experience With Cms Development Like Typo3, Wordpress, Contentful
As Well As Asp.net, C#.net
Experience In Development With Zend 1-3 And Cms Systems (Including Client-specific Solutions)
Software Development Using Modern Methods And Tools: Intellij Idea, Phpstorm, Eclipse, Visual Studio
Confluence, Jira, Bitbucket, Bambo, Jenkins 2
Agile Software Development, Scrum, V-model, Kanban
Vagrant, Grunt, Gradle, Git, Github, Ci/ce
Rest And Soap
Google Cloud, Aws
Apache Tomcat, Jboss, Nginx
Experience In Creating Business And Technical Specifications, As Well As Test Cases
Experience Leading Dev Teams And As A Scrum Master
Experience In Project Management Of Application Development And Upgrades With Accompanying Quality Assurance
Experience In Administration And Support, Including First And Second Level Support

Programming

Php 4,5,7,8 Html 5, Javascript 14 Years +++
Typescript, Vuejs, Nodejs, Laravel 10 Years +++
Java 7 Years +++
Asp.net, C#.net 2 Years +
C/c++ 5 Years ++
Css 2,3 13 Years +++
Jquery, Sccs 13 Years +++
Zend, Zend 2 (Object Orientated Open Source Php-framework) 5 Years +++
Cakephp, Symfony (Object Orientated Open Source Php-frameworks) 2 Years +++
Java Spring Framework, Thymeleaf 3 Years +++
Angular 2 Years ++
Typo3, Contentful (Content-management-systeme) 7 Years +++
Wordpress (Content-management-systeme) 10 Years +++
Xml, Json 7 Years +++
Soap, Rest (Api´s / Webservices) 10 Years +++
Pure.css, Bootstrap (4), Foundation, Skeleton (Css Frameworks) 7 Years +++
Junit Testing 7 Years ++
Ooa/ood, Uml (Datamodels) 7 Years +++

Databases

Mssql 5 Years +++
Oracle 10, 11 4 Years ++
Mysql 4,5 / Mariadb 14 Years +++

Network

Tcp/ip, Lan/wan, Intranet/internet 11 Years +++

Others

Git, Svn 10 Years +++
Unix 10 Years ++
Nginx, Jboss 6 Years ++
Apache, Tomcat 10 Years +++
Microsoft Internet Information Services (Iss) 2 Years +
Adobe Photoshop, Illustrator, Indesign 5 Years ++
Eclipse, Intellij Idea, Phpstorm 10 Years +++
Jira, Confluence, Visual Studio 10 Years ++

Social Skills

Employee Management, Personnel Responsibility 8 Years +++
Project Management It 7 Years +++
Project Management Events And Personnel 8 Years +++

Significance

- = Basic Knowledge
++ = Advanced Knowledge
+++ = Expert Knowledge

Languages

German

Native

English

Advanced

Education

Oct 2007 - Jun 2014

University of Mainz

Bachelor of Science, Computer Science with a focus on web development and databases · Computer Science · Mainz, Germany

High school diploma · Mainz, Germany

Statistics

Experience

Total positions 13

Experience in Information Technology 17.5 y

Avg length 2 y 8 m

Longest experience 17 y 3 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Fullstack-Developer, Lead-Developer / Fullstack-Developer, Project Management / Fullstack Developer

Main industries Information Technology, Professional Services, Media and Entertainment

Main business areas Information Technology, Project Management, Marketing

Qualifications

Highest degree Bachelor

Profile

Created

September 2025

Last Update

April 2026

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Frequently asked questions

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

Where is Markus based?

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

What languages does Markus speak?

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

How many years of experience does Markus have?

Markus has at least 17 years of experience. During this time, Markus has worked in at least 12 different roles and for 13 different companies. The average length of individual experience is 1 year and 4 months. Note that Markus may not have shared all experience and actually has more experience.

What roles would Markus be best suited for?

Based on recent experience, Markus would be well-suited for roles such as: Fullstack-Developer, Lead-Developer / Fullstack-Developer, Project Management / Fullstack Developer.

What is Markus's latest experience?

Markus's most recent position is Fullstack-Developer at VRM Digital / RYZE.

What companies has Markus worked for in recent years?

In recent years, Markus has worked for VRM Digital / RYZE and My IT and Event Management Company.

Which industries is Markus most experienced in?

Markus is most experienced in industries like Information Technology, Professional Services, and Media and Entertainment. Markus also has some experience in Education, Healthcare, and Government and Administration.

Which business areas is Markus most experienced in?

Markus is most experienced in business areas like Information Technology, Project Management, and Marketing. Markus also has some experience in Product Development, Operations, and Customer Service.

Which industries has Markus worked in recently?

Markus has recently worked in industries like Information Technology, Professional Services, and Media and Entertainment.

Which business areas has Markus worked in recently?

Markus has recently worked in business areas like Information Technology, Marketing, and Project Management.

What is Markus's education?

Markus holds a Bachelor in Computer Science from University of Mainz.

What is the availability of Markus?

Markus is immediately available full-time for suitable projects.

What is the rate of Markus?

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