jQuery Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used jQuery
Tim J.
Last position:
Senior Frontend & UX Engineer at EnBW Energie Baden-Württemberg AG
Key responsibility for the visual and technical frontend relaunch as well as the continued development of the platform architecture.
- Designed and continuously developed the frontend architecture, including a Figma-based Component Library and migration to Vue 3.
- Developed a robust, high-performance, component-based CSS architecture.
- Continuously optimized accessibility, Core Web Vitals, and web performance.
- Worked closely with UX, Product, and Editorial teams on design, product, and implementation decisions.
RESULT:
- WCAG-compliant
- Core Web Vitals issues resolved
- PageSpeed ~90 Desktop / ~80 Mobile
Vitaliy M.
Last position:
Team Lead Development with a focus on lead generation at one of Germany's largest insurance companies
- Backend WordPress web development.
Hooman B.
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.
Dirk H.
Last position:
Owner at Soorce GmbH
- Working on a temporary assignment at REWE digital GmbH
- Agile team coach for a team in brick-and-mortar retail
- Coaching, lateral leadership, and facilitation
- Establishing agile values and applying agile methods
- Supporting team development and facilitating conflict resolution
- 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)
Kay O.
Last position:
Fullstack Developer at INIT GmbH
- Development of monitoring and control systems for public transportation
- Development of a platform for real-time monitoring of passenger information and ticketing systems, as well as an application for remote control and status monitoring of access control systems
- Development of dynamic forms, complex tables, real-time dashboards (SignalR), and reusable frontend components (using Storybook)
- Implementation of REST interfaces in the backend
- Deployment to the Microsoft Azure Cloud
- Technologies used: Angular 20, Angular Material 3, Dev Extreme, Storybook, C#/.NET 10
Florian R.
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 M.
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 N.
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
Ingo C.
Last position:
Founder, freelance CMS expert at CMS Consulting Cousin
- Freelance work as a CMS expert
Cedric J.
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 H.
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
Sascha N.
Last position:
Consultant at Kallisto Consulting GmbH
- Planning and further development of responsive CMS websites
- Frontend development and expansion of internal PHP applications
- CONTENS and OpenCms
Thomas P.
Last position:
Freelance Software Architect at Self-employed
Annick W.
Last position:
Freelance Senior Frontend Developer at ROSE Bikes GmbH
Alexander S.
Last position:
TYPO3 Senior Fullstack Developer, Backend & Frontend at Vergleich.de Gesellschaft für Verbraucherinformation mbH via HALIAN GmbH
- Typoscript
- Extbase
- Fluid
- Typescript
- requireJS
- WebVital
Discover over 15,000 top freelancers
Statistics of experts using jQuery
Aggregated from the professional profiles of matched freelancers.
Experience
21 years
Position duration
3 years (Germany: 5.3 years)
Positions per freelancer
10 (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: 84%)
Master's degree or higher
56% (Germany: 45%)
Doctorate
22% (Germany: 7%)
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Cologne are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
jQuery experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (88%)
- Insurance (50%)
- Retail (44%)
- Banking and Finance (31%)
- Media and Entertainment (25%)
- Professional Services (25%)
- Advertising (19%)
- Automotive (19%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What jQuery does
jQuery is a JavaScript library that simplifies common browser tasks. Its concise syntax helps specialists select and update HTML elements, handle events, create animations and send asynchronous requests. It remains common in established websites and applications that depend on proven front-end behavior.
Where it fits
jQuery is used for customer portals, online shops, content-managed websites, internal tools and interactive forms. It can improve browser interfaces without requiring a complete front-end rewrite. In Cologne, companies often bring it into projects where existing digital products must keep working while new features are added.
- Dynamic forms and validation
- Menus, filters and interactive tables
- AJAX requests and partial page updates
- Plugin integration and legacy maintenance
Ecosystem and tooling
Strong jQuery specialists understand JavaScript, HTML, CSS and the browser document object model. They may work with jQuery UI, Bootstrap, npm, webpack, REST APIs and server-rendered applications. They also know how to inspect network requests, manage event delegation and replace outdated plugins safely.
When to hire expertise
Freelance support is useful when a team inherits a jQuery codebase, needs a focused interface change or must connect an older front end to modern services. Companies may also need help reducing duplicated scripts, resolving browser issues or planning a gradual move toward another JavaScript approach.
- A legacy interface is difficult to extend
- Plugins conflict or behave inconsistently
- Front-end changes depend on unfamiliar server templates
- A release needs targeted browser testing
What strong specialists deliver
Good professionals first map the existing selectors, events, plugins and data flows. They write readable JavaScript, avoid fragile global state and test behavior across supported browsers. Their deliverables may include maintainable interface components, documented API calls, regression fixes and a clear handover for the internal team.
Collaboration in Cologne
jQuery work often involves close coordination with product, design and back-end specialists. Remote collaboration works well when repositories, browser requirements and acceptance criteria are clear; on-site work can help when the codebase is poorly documented or tied to local delivery routines. German or English communication should match the project team.
Frequently asked questions
Key details about jQuery, drawn from the questions we get asked most.
jQuery is used to simplify browser-side JavaScript work, including DOM updates, event handling, animations, form behavior and asynchronous requests. It is especially useful for maintaining established websites and adding focused interactions without replacing the full front end.
jQuery can be sensible when a project uses server-rendered pages, existing plugins or a small amount of interaction. For a new, highly componentized application, a modern framework may offer a clearer structure, but the right choice depends on the product, team skills and long-term maintenance plan.
jQuery directly manipulates the document and works well for incremental enhancements. React and Vue provide more structured component models for complex interfaces, so the decision should consider the existing codebase, rendering approach, testing needs and migration cost rather than popularity alone.
A capable jQuery specialist should also understand JavaScript, HTML, CSS, browser debugging and HTTP requests. Experience with REST APIs, server-rendered templates, accessibility, responsive layouts and build tools is valuable when the work involves a complete web interface.
For a small selector, event or form change, a professional who can quickly read an existing codebase may be enough. Larger maintenance work requires someone who can trace plugin dependencies, assess browser behavior, test regressions and explain the risks of changing shared scripts.
Yes. jQuery work is often suitable for remote collaboration when the repository, browser support policy and test process are accessible. On-site sessions in Cologne can help with undocumented legacy systems, close product workshops or coordination with teams that work primarily in person.
Ask the jQuery specialist to explain event delegation, plugin conflicts, asynchronous error handling and safe DOM updates in the context of your codebase. Review how they inspect existing behavior, test changes and document decisions, not only whether they can produce a quick visual result.
Before taking on jQuery work, clarify the supported browsers, page templates, plugin versions, API contracts and release process. Also establish whether the goal is maintenance, a contained enhancement or a gradual migration, because each path calls for different technical decisions.
The average hourly rate of freelancers in Cologne, Germany who have used jQuery in their recent projects is 97 €, which corresponds to a daily rate of about 773 € 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, 56% hold at least a Master's degree, and 22% 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 3 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 (19%).
The most common industries among freelancers in Cologne, Germany who have used jQuery in their recent projects are Information Technology (88%), Insurance (50%), and Retail (44%).
The most common business areas among freelancers in Cologne, Germany who have used jQuery in their recent projects are Information Technology (100%), Product Development (94%), and Quality Assurance (38%).
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 Countries:
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