jQuery Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used jQuery
Hooman Behmanesh
Last position:
Fullstack Developer at Möbel Roller GmbH
- Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
- Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
- Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
- Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
- Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
- Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
- Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
- Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
- Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.
Thomas Pawlitzki
Last position:
Freelance Software Architect at Self-employed
Florian Rubel
Last position:
Senior Fullstack Developer at Ivii GmbH
- Two-month modernization of the management UI for AI-powered cameras
- Rewrote a complex React application to Vue 3 with single file components
- Set up the core architecture of the Vue application and configured Vite, Pinia, Router, I18n, ESLint, and Prettier
- Custom integration of Leaflet to display detection zones on images
- Assisted with backend extension and authentication adjustments
Vladimir Maznicenko
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Louis Nguenkam
Last position:
Specialist in Adobe Experience Manager & Microservices at Nguenkam Consulting & Engineering
Java 11/21
Springboot
Swagger/OpenApi
Azure Pipelines
Trivy Integration
Apache Sling
OSGI
Java Content Repository (JCR)
Apache Jackrabbit Oak
Adobe HTL
GraphQL
Maven
GitLab
IntelliJ
Azure Cloud
Azure DevOps
Terraform
AEM specialist in the Scrum team
Development and deployment of microservices via Open API interfaces
Operation of microservices in the Azure Cloud
Implementation of AEM modules and integration with microservices
Member of the knowledge transfer team and a backend coordination team
Dirk Hesse
Last position:
Owner at Soorce GmbH
- On secondment to REWE digital GmbH
- Agile team coach for a brick-and-mortar retail team
- Coaching, lateral leadership and facilitation
- Establishing agile values and applying agile methods
- Team development and conflict moderation
- Facilitating company-wide strategy workshops
- Technologies: Kanban, Scrum, Microsoft Teams, Liberating Structures, Jira, Confluence, Concept Board, Miro, Test-Driven Development, OOP, DBMS (SQL, MySQL, MariaDB, PostgreSQL)
Ingo Cousin
Last position:
Founder, freelance CMS expert at CMS Consulting Cousin
- Freelance work as a CMS expert
Cedric Jacob
Last position:
Co-Founder / CTO at Infinite Hooray ApS
- Develop powerful add-ons for customer service systems with innovative Zendesk apps designed to drive business growth, improve efficiency, and enhance customer satisfaction
- Implement full Zendesk solutions and provide hands-on support to bring customer service vision to life
- Combine customer service and technology expertise to address the complexities of delivering top-notch customer service
- Execute Zendesk implementations in 20+ countries and develop AI apps that automate replies
- Maintain a proven track record of success in advancing customer service capabilities
Jacqueline Haefke
Last position:
Kitchen Appliance Manufacturer
Setting up and enhancing an international subscription management system
Migrating and decommissioning a Hybris-SAP system and integrating Zuora
Implementing numerous interfaces to various systems (external and internal)
Setting up and improving monitoring with Grafana, Prometheus, and Databricks
Introducing logging with Loki
Implementing business requirements using jQuery, Thymeleaf, Spring Boot, Java, Go, and Python
Adjusting and extending the GitLab CI pipelines
Setting up and extending infrastructure as code with Terraform and ArgoCD on AWS
Setting up and running E2E and performance tests
Expanding the Databricks business intelligence solution to provide various KPIs
Responsibilities: Architecture, DevOps, development, unit tests, coaching employees and apprentices, E2E, smoke, and integration tests, agile methods consulting (Kanban, Scrum)
Technologies and methods: Java, Go, Kotlin, Node.js, Spring Boot, SOAP/REST, Quarkus, Thymeleaf, Vaadin, Slack, Jira, Confluence, IntelliJ, GitLab, SQS, Kafka, AWS, Kubernetes, Terraform, Maven, Gradle, GitLab CI, Databricks
Kay Odenthal
Last position:
Fullstack Developer at INIT GmbH
- Development of monitoring and control systems for public transport
- Development of a platform for real-time monitoring of passenger information and ticketing systems and an application for remote control and status monitoring of access systems
- Development of dynamic forms, complex tables, real-time dashboards (SignalR), and reusable components in the frontend (using Storybook)
- Implementation of REST interfaces in the backend
- Deployment to Microsoft Azure Cloud
- Technologies used: Angular 20, Angular Material 3, Dev Extreme, Storybook, C#/.NET 10
Annick Walkenhorst
Last position:
Freelance Senior Frontend Developer at ROSE Bikes GmbH
Alexander Stier
Last position:
TYPO3 Senior Fullstack Developer, Backend & Frontend at Vergleich.de Gesellschaft für Verbraucherinformation mbH via HALIAN GmbH
- Typoscript
- Extbase
- Fluid
- Typescript
- requireJS
- WebVital
Jacqueline Krech
Last position:
OTTO
- Design, development, and monitoring of microservices
- Migrating functions from a monolithic system into separate microservices
- Designing and implementing new microservices (backend and frontend)
- Setting up and maintaining a CI/CD pipeline (GitHub Actions)
- Configuring cloud infrastructure with AWS CDK and Terraform
- Designing and implementing event-driven communication with AWS SNS/SQS and Apache Kafka
- Ensuring code quality through Test Driven Development (TDD), static code analysis, and Clean Code
Discover over 15,000 top freelancers
Statistics of experts using jQuery
Aggregated from the professional profiles of matched freelancers.
Experience
21 years
Position duration
2.7 years (Germany: 5.3 years)
Positions per freelancer
11 (Germany: 13)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Insurance, Retail
Certification focus areas
Information Technology, Product Development, Marketing
Bachelor's degree or higher
100% (Germany: 85%)
Master's degree or higher
67% (Germany: 46%)
Doctorate
33% (Germany: 7%)
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 96%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Cologne are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Cologne using jQuery
Rates are based on recent contracts and do not include FRATCH margin.
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What it is
jQuery is a JavaScript library for DOM work, event handling, animation, and AJAX. It is common in older web apps and still appears in themes, plugins, CMS builds, and admin tools. Strong experts know where to keep it and where to replace it.
Typical work
- Fix click, form, and navigation behavior
- Maintain jQuery UI widgets and plugins
- Connect pages to APIs with AJAX
- Clean up old inline scripts and broken selectors
- Support CMS, portal, and shop front ends
Ecosystem skills
Good jQuery specialists also work with JavaScript, HTML, CSS, and browser debugging tools. They often handle jQuery UI, jQuery Validate, and plugins that sit inside WordPress, Drupal, or custom back offices. They know how to trace conflicts with other scripts and keep the code readable.
When to bring in help
Companies hire freelance jQuery experts when older pages become hard to change, when browser bugs appear after a release, or when a team needs quick support for a plugin-heavy build. In Cologne, this often fits agencies and internal teams that still run mixed front ends and need clear handover notes.
What strong experts do
A strong specialist can read old code fast, find selector problems, and separate useful library code from copy-pasted clutter. They test in real browsers, check for event conflicts, and keep changes small so the rest of the application stays stable. They also explain what should be modernized next.
Good fit and limits
jQuery is useful for targeted fixes, legacy maintenance, and simple interactive features. It is less useful when a team wants a modern component framework or a large rewrite. The best experts know how to support jQuery safely today without forcing it into places where it no longer belongs.
Frequently asked questions
Key details about jQuery, drawn from the questions we get asked most.
jQuery is used for DOM updates, event handling, animations, form behavior, and AJAX requests. Companies still rely on it in older web apps, CMS themes, admin areas, and plugin-based sites where fast fixes matter more than a full rewrite.
jQuery is lighter and more direct for small interface changes and legacy maintenance. React, Vue, or similar frameworks are better when a product needs a component-driven front end and a larger state model. A good specialist can tell when jQuery is still the right tool and when it should be reduced.
A strong jQuery specialist should also be comfortable with JavaScript, HTML, CSS, browser debugging, and REST or AJAX integration. In many projects, knowledge of WordPress, Drupal, or older CMS templates is just as useful as the library itself.
A small UI fix can be handled by someone who knows the codebase and the relevant plugins well. Larger maintenance work needs an expert who can trace old selectors, reduce conflicts, and test across the browsers your users actually run. The harder the legacy code, the more valuable deep jQuery experience becomes.
Yes. Most jQuery tasks can be handled remotely because the work is code review, debugging, and implementation. On-site time in Cologne only becomes useful when a team wants workshop-style alignment, access to local stakeholders, or fast collaboration with an existing in-house group.
Look for clean code changes, a clear explanation of root causes, and careful testing in real browsers. A solid jQuery expert also documents plugin dependencies, avoids unnecessary rewrites, and shows how the fix fits the rest of the front end.
Yes, jQuery remains common in WordPress and Drupal themes, plugin code, and admin interfaces. For these systems, a specialist often needs to debug theme scripts, adjust forms, or replace a fragile plugin interaction without breaking the rest of the site.
Typical deliverables include bug fixes, script cleanups, plugin adjustments, AJAX interactions, and small interface improvements. A good jQuery professional should also leave clear notes on what was changed, what depends on it, and what should be modernized later.
The average hourly rate of freelancers in Cologne, Germany who have used jQuery in their recent projects is 99 €, which corresponds to a daily rate of about 792 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used jQuery in their recent projects, 100% hold at least a Bachelor's degree, 67% hold at least a Master's degree, and 33% hold a doctorate.
On average, freelancers in Cologne, Germany who have used jQuery in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Cologne, Germany who have used jQuery in their recent projects are German (100%), English (100%), and French (23%).
The most common industries among freelancers in Cologne, Germany who have used jQuery in their recent projects are Information Technology (92%), Insurance (54%), and Retail (46%).
The most common business areas among freelancers in Cologne, Germany who have used jQuery in their recent projects are Information Technology (100%), Product Development (92%), and Quality Assurance (46%).
Main locations of FRATCH Experts, who have recently used jQuery
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich 
Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg 
Berlin 
Hamburg 
Munich 
Frankfurt 
Dusseldorf Request a free demo
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Philipp Thomaschewski
FRATCH CEO
