Karsten Jasper - WordPress Development

Q: Where is Karsten based?

Karsten is based in Berlin, Germany .

Q: What languages does Karsten speak?

Karsten speaks the following languages: English (Advanced), German (Elementary) .

Q: How many years of experience does Karsten have?

Karsten has at least 20 years of experience. During this time, Karsten has worked in at least 10 different roles and for 12 different companies . The average length of individual experience is 2 years and 8 months . Note that Karsten may not have shared all experience and actually has more experience.

Q: What is Karsten's latest experience?

Karsten's most recent position is WordPress Development at martens+puller Ingenieurgesellschaft mbH .

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

In recent years, Karsten has worked for martens+puller Ingenieurgesellschaft mbH , Stiftung Orte der deutschen Demokratiegeschichte , Ideengut – Agentur für Kommunikation , SPD-Fraktion im deutschen Bundestag , and Schweitzer Fachinformationen OHG .

Q: Which industries is Karsten most experienced in?

Karsten is most experienced in industries like Information Technology (IT) , Media, Entertainment and Publishing , and Government and Public Administration . Karsten also has some experience in Advertising , Professional Services , and Telecommunication .

Q: Which business areas is Karsten most experienced in?

Karsten is most experienced in business areas like Information Technology (IT) , Product Development , and Project Management . Karsten also has some experience in Quality Assurance (QA) .

Q: Which industries has Karsten worked in recently?

Karsten has recently worked in industries like Information Technology (IT) , Government and Public Administration , and Advertising .

Q: Which business areas has Karsten worked in recently?

Karsten has recently worked in business areas like Information Technology (IT) , Product Development , and Project Management .

Recommended expert

Berlin, Germany

Experience

Apr 2025 - Present

1 year

WordPress Development

martens+puller Ingenieurgesellschaft mbH

Migration, maintenance and further development of the WordPress portal martens-puller.de
PHP, HTML, CSS

Feb 2024 - Present

2 years 2 months

WordPress Development

Stiftung Orte der deutschen Demokratiegeschichte

Maintenance and further development of the WordPress portal demokratie-geschichte.de
PHP, HTML, CSS

Jan 2024 - Present

2 years 3 months

WordPress Development

Ideengut – Agentur für Kommunikation

Technical maintenance and optimization of the WordPress portal LeadersAcademy.com
PHP, HTML, CSS

Oct 2021 - Feb 2022

5 months

Website redesign consulting

SPD-Fraktion im deutschen Bundestag

Development of a rough concept for a new website together with stakeholders from the SPD parliamentary group in the German Bundestag as a basis for the tendering of the implementation

May 2020 - Present

5 years 11 months

IT consulting, project and product management for iKiosk

Schweitzer Fachinformationen OHG

Design, product development, specification and implementation of external interfaces and integrations of B2B partner systems into the iKiosk, e.g., Deutsche Bahn and Airbus/Bundeswehr/Marine
Hosting and operation of the platforms
Requirements management, project leadership and pair programming with the external developer
Provision, maintenance and continuous improvement of the reporting tool
Preparation of monthly financial statements for the iKiosk and analysis of sales data
Integration and aggregation of diverse data sources, creation of SQL queries to analyze the data

Sep 2014 - Apr 2020

5 years 8 months

Technical Project Manager and Product Owner iKiosk

Axel Springer SE

Coordination of the external service provider/general contractor using an agile approach, establishment and continuous optimization of a Scrum process
Project controlling and contract negotiations
Extensive alignments with internal departments and stakeholders within the corporate group
Product management, coordination and contribution to the conception, design, and UX development of mobile Android and iOS apps as well as the eCommerce portal ikiosk.de
Prioritization of user stories, development of roadmaps, planning of backlog and sprints
Requirements management
Conception, specification, and management of the implementation of external interfaces and integrations with B2B partner systems, e.g. Deutsche Bahn and the German Armed Forces
Support and further development of the reporting tool

Jul 2014 - Feb 2015

8 months

Project management for Windows 8.1 tablet & phone apps

DIE WELT

Management of external and internal service providers
Coordination and support for conception, design, and UX
QA management

Mar 2013 - Jun 2014

1 year 4 months

Product Owner, Interim CTO Celepedia

Room 49 GmbH (Axel Springer ideAS)

Definition of requirements for the agile development team using Kanban and Scrum in Jira tickets
Formulation of user stories and acceptance criteria
Planning of backlog and sprints and development of a roadmap according to the team vision
Stakeholder and design team management
Technical consulting

Aug 2010 - Dec 2012

2 years 5 months

Project Manager, Requirements Manager

Sevenval GmbH (vorm. YOC AG)

Project management and conception for various iPhone apps, mobile portals, and web apps
Client communication and requirements management
Creation of wireframes and support for graphic design and QA
Management of development by subcontractors
Clients include: Austrian Airlines, Werben & Verkaufen, e wie einfach, Bunte, Milka, Federal Association of German Banks, Baur Versand, Messe Frankfurt, Cosmos Direkt

Jan 2010 - Jun 2010

6 months

IT Architect & Team Lead

Stayfriends GmbH

Creation of software architectures and technical concepts as enhancements of the existing portal software
Support of implementation and deployment
Team leadership

Jan 2009 - Sep 2009

9 months

Bonn, Germany

Software Architect, Requirements Manager

T-Mobile International AG, Deutsche Telekom AG

Technical design and architecture for an end-to-end solution between mobile devices and backend
Specification of a REST API for social network functionality
Analysis of third-party solutions
Requirements management

Jul 2005 - Dec 2008

3 years 6 months

Project Manager, Scrum Master, and Software Architect

neofonie Technologieentwicklung und Informationsmanagement GmbH

WAZ - DerWesten.de: Technical design, architecture, and project management for an event search function; design of data formats, system architecture, redesign of search functionality, frontend and backend
iScout (Scout24.de): Led the reimplementation of the Scout24 homepage based on configurable widgets
Travelscout24: Technical design, architecture, and project management for a meta-search function; import and integration of external partners, data formats, system architecture, redesign of search functionality, frontend and backend
local24.de: Technical design, architecture, and project management for the search and spider backend; import and crawling of large feeds, automatic enrichment of classified ads, providing full-text search and administration as SOAP web services
Jobs.de: Technical design, architecture, and project management; crawling over 1 million company websites, automatic detection of job ads using SVM, providing a web frontend full-text search

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (12 years), Media and Entertainment (11 years), Government and Administration (2.5 years), Advertising (2 years), Professional Services (1 year), and Telecommunication (0.5 years).

Information Technology

Media and Entertainment

Government and Administration

Advertising

Professional Services

Telecommunication

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (20 years), Product Development (19 years), Project Management (19 years), and Quality Assurance (0.5 years).

Information Technology

Product Development

Project Management

Quality Assurance

Skills

Agile Project Management, (Technical) Project Leadership
Product Owner, Requirements Management
Consulting, Concept Development, Specification
Wordpress Development, Php
Web And Mobile Portals, Ecommerce, Ios & Android Apps

Languages

English

Advanced

German

Elementary

Education

TU Berlin

Diploma in Computer Science · Computer Science · Berlin, Germany

Certifications & licenses

Certified Scrum Master

Profile

Created

December 2025

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Frequently asked questions

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

Where is Karsten based?

Karsten is based in Berlin, Germany.

What languages does Karsten speak?

Karsten speaks the following languages: English (Advanced), German (Elementary).

How many years of experience does Karsten have?

Karsten has at least 20 years of experience. During this time, Karsten has worked in at least 10 different roles and for 12 different companies. The average length of individual experience is 2 years and 8 months. Note that Karsten may not have shared all experience and actually has more experience.

What roles would Karsten be best suited for?

Based on recent experience, Karsten would be well-suited for roles such as: WordPress Development, Website redesign consulting, IT consulting, project and product management for iKiosk.

What is Karsten's latest experience?

Karsten's most recent position is WordPress Development at martens+puller Ingenieurgesellschaft mbH.

What companies has Karsten worked for in recent years?

In recent years, Karsten has worked for martens+puller Ingenieurgesellschaft mbH, Stiftung Orte der deutschen Demokratiegeschichte, Ideengut – Agentur für Kommunikation, SPD-Fraktion im deutschen Bundestag, and Schweitzer Fachinformationen OHG.

Which industries is Karsten most experienced in?

Karsten is most experienced in industries like Information Technology (IT), Media, Entertainment and Publishing, and Government and Public Administration. Karsten also has some experience in Advertising, Professional Services, and Telecommunication.

Which business areas is Karsten most experienced in?

Karsten is most experienced in business areas like Information Technology (IT), Product Development, and Project Management. Karsten also has some experience in Quality Assurance (QA).

Which industries has Karsten worked in recently?

Karsten has recently worked in industries like Information Technology (IT), Government and Public Administration, and Advertising.

Which business areas has Karsten worked in recently?

Karsten has recently worked in business areas like Information Technology (IT), Product Development, and Project Management.

What is Karsten's education?

Karsten holds a Master in Computer Science from TU Berlin.

Does Karsten have any certificates?

Karsten has 1 certificate: Certified Scrum Master.

What is the availability of Karsten?

Karsten is immediately available part-time for suitable projects.

What is the rate of Karsten?

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