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Josef KalenbergJK

Josef Kalenberg

Fullstack Developer

€720/day
7 projects
Krefeld, DE
8-15 years
Gatsby
WordPress
JavaScript
E-Commerce

Average response time: 1 hour

Freelancer profile translated to English.
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About Josef



Hello,
I am Jo Kalenberg, an experienced freelancer specializing in React, JavaScript, WooCommerce, WordPress, WordPress Plugin Development, and Shopify. With my expertise, I support you in developing customized web applications and online shops.

I have extensive experience in creating responsive and user-friendly web applications with React and JavaScript. Additionally, I am proficient in WooCommerce, WordPress, and can develop custom WordPress plugins. I also have experience in setting up and customizing Shopify online shops.

I always strive to deliver high-quality solutions and ensure customer satisfaction.

Please feel free to contact me to learn more about my portfolio and past projects.

Sincerely,
jo kalenberg

  • German

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Alta Via Consulting GmbH
    Malt logoOn Malt
    Plugin Development for WordPress
    March 2025 - May 2025 (2 months)
    Development of plugins and interfaces between WordPress and Netsuite
    JavaScript CSS3 WordPress JavaScript WordPress Plugin
  • Brennholz Beez
    Malt logoOn Malt
    Programmer
    April 2023 - May 2023 (1 month)
    This concerns an online shop that still needs adjustments. We developed 2 plugins to customize the shop according to the client's requirements. We also improved the speed of the site.
    WooCommerce WordPress Plugin HTML5 JavaScript Libraries PHP CSS3 WordPress Git
  • makrohaus crossmedia
    Malt logoOn Malt
    Programmer
    November 2022 - November 2022 (1 month)
    JavaScript PHP CSS3 WordPress
Check out Josef's experience

Reviews

4.7

Out of 3 ratings

M

Mario

Brennholz Beez

Reviewed on 5/9/2023

Very pleasant collaboration and professional communication. My wishes were implemented according to my ideas, and my own constructive ideas were also incorporated. The complex error analysis in the existing programming was carried out professionally and the errors were fixed. Thank you very much, and I look forward to working with you again!
C

Christoph

makrohaus crossmedia

Reviewed on 11/21/2022

The collaboration with Josef was perfect throughout the entire project. Great communication and extremely solution-oriented. All accessibility requirements were also implemented very well.
Show all 3 reviews

Recommendations

FU
FU
Former user and 1 other person have recommended Josef

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Certifications

Josef's certifications are only visible to Malt Community members

Skill set

CSS3
HTML5
Shopify
Shopware
Git
TYPO3
Elementor
E-Learning
Typescript
WordPress Plugin
Netlify
Phonegap
SASS
TailwindCSS
CMS Customization
Front End Interface Development
Performance Optimization
Backend Service Development
External API integration
WordPress Plugin
WooCommerce
JavaScript Libraries
PHP
MySQL

Categories