jQuery Experts in Dusseldorf
for reliable web interfaces, matched in minutes with vetted freelancersHire experts who create responsive browser interfaces, maintain legacy JavaScript applications and connect front ends to APIs with jQuery, AJAX and modern JavaScript. FRATCH matches you quickly and precisely with vetted, available freelancers.
Meet FRATCH Experts in Dusseldorf, who have recently used jQuery
Thorsten L.
Last position:
Senior Security Analyst
- Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
- System analysis
- Threat modeling
- Decision-making on vulnerability mitigation strategies
- Implementation of vulnerability detection mechanisms
- Security scans
- DevSecOps practices
- Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
- Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL
Ramzi A.
Last position:
Full Stack Java Developer at ISO Public Services GmbH
- Contributed to the development of an advanced RAG AI Chat application that integrates multiple LLM models, enabling users to seamlessly switch between models based on specific tasks. This improved the user experience by providing tailored, efficient solutions for various use cases, such as event scheduling, booking systems, and complex task management.
- Participated in designing and implementing a robust backend architecture using Spring AI, enabling advanced AI-driven capabilities like intelligent task automation, language processing, and contextual recommendations. Leveraged Spring AI Tools and Advisors to enhance the performance and decision-making of the AI models.
- Collaborated on the integration of vector databases to support embeddings, enhancing the app's ability to understand user queries and perform actions based on complex, real-time data inputs.
- Contributed to the development of a seamless, user-friendly front-end interface using React with TypeScript support, ensuring a modern, responsive, and scalable user experience across platforms.
- Assisted in implementing state management with Redux RTK for efficient data flow and real-time updates, optimizing the overall user experience in dynamic scenarios such as scheduling and task management.
- Partnered with stakeholders to define feature requirements, helping ensure that the app could scale to meet evolving business needs and integrate with other systems like calendar and email services. Worked alongside cross-functional teams, including data scientists and UI/UX designers, to fine-tune AI models and ensure alignment with project goals.
- Contributed to ensuring end-to-end system performance, security, and compliance by helping integrate authentication mechanisms, role-based access control, and secure communication protocols in both backend and frontend layers.
Technology Stack and Key Contributions:
- Java / Spring Boot / Spring AI: Developed backend services leveraging Spring AI for intelligent responses, task automation, and complex workflows.
- React / TypeScript: Built intuitive user interfaces with React and TypeScript, ensuring a smooth and scalable frontend.
- Redux RTK: Managed application state with Redux RTK for optimized state management, enabling dynamic, real-time data updates.
- Vector Databases: Integrated vector databases (pgVector) for embedding support, improving AI model performance in handling complex queries.
- PostgreSQL / Redis: Managed persistent and temporary data with relational and in-memory data stores, ensuring data integrity and speed.
- Kafka: Utilized Apache Kafka for event-driven communication and seamless integration between microservices.
- Spring Security: Ensured the security of backend services with robust authentication and authorization mechanisms.
- CI/CD & DevOps: Integrated continuous integration and deployment pipelines to ensure rapid and secure deployment of features and updates.
Andreas G.
Last position:
Senior Fullstack .NET (Core) & Angular Developer at IT Service Provider
- Supporting several agile teams in the new product development of an enterprise CRM and ERP application
- Web frontend development with Angular 17–21 (microfrontends, Domain-Driven Design, MDB-Bootstrap)
- Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
- Technical feature design for assigned tasks
- Technical architecture design including forward-looking planning of AI-supported extension options
- Proof-of-concept implementation of AI-supported workflows with n8n and a locally hosted LLM (Ollama)
- Coordination with stakeholders and Product Owners, support with sprint planning
Result: Delivery of production-ready microservices and frontend modules in agile sprint cycles.
Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama
Dmitry T.
Last position:
Web Software Engineer at Freelancer
Third-side integration development (REST: Amazon, OpenAI, Etsy, Shopware, Prestashop, etc)
Performance optimization (Refactoring, SQL analysis)
LMS development and deployment (Moodle)
Cloud deployment automation (Amazon, Azure, Gitlab CI/CD, Docker)
Backend and Frontend development (Laravel, VueJs)
Collaboration with partner-developers (national and international)
Shirtigo GmbH
GRELLARTIG Digital GmbH
velpTEC edutainment GmbH
Jan G.
Last position:
Master Data Application at confidential
Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.
Implementation, architecture, project management.
Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.
Dalia C.
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
- Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
- Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
- Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
- Used Azure DevOps for backlog management and documentation, and Git for version control
- Developed REST interfaces to CRM systems
- Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
- Designed a Git branching strategy and conducted code reviews
- Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
- Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
- Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
- Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
- Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
- Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects
Thang N.
Last position:
Lead Frontend Developer at STRĂ–ER Dialog Group
- Development of the “Ranger App” (Maui Blazor Hybrid), an app to manage all internal apps
- Development of the “SWA App” (Maui Blazor Hybrid), a data capture app for Telekom acquisitions
Karan S.
Last position:
Senior Software Engineer at Infosys Ltd
- Forecasting Cost Tool (PCCT) imports data via SSIS from CSV files and processes modules for administrator, user management, train operations, and fleet operations.
- Conducted requirement analysis and effort estimation.
- Designed database and developed web pages.
- Tested the application.
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
Philip S.
Last position:
Web Developer at Self-employed Web Developer
- Self-employed Web Developer
- Website: [link]
Discover over 15,000 top freelancers
Statistics of experts using jQuery
Aggregated from the professional profiles of matched freelancers.
Experience
21 years
Position duration
2.2 years (Germany: 5.3 years)
Positions per freelancer
14 (Germany: 13)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Manufacturing, Government and Administration
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
71% (Germany: 84%)
Master's degree or higher
43% (Germany: 45%)
Doctorate
29% (Germany: 6%)
Certifications per freelancer
5 (Germany: 2)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 96%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Dusseldorf 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 Dusseldorf 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 19 Sep 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 (100%)
- Manufacturing (50%)
- Government and Administration (50%)
- Retail (50%)
- Energy (40%)
- Media and Entertainment (40%)
- Telecommunication (40%)
- Education (30%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Browser interfaces
jQuery is a JavaScript library for simplifying browser scripting. It provides concise APIs for selecting and changing HTML elements, handling events, creating animations and sending asynchronous requests. Companies use it to build interactive forms, menus, dashboards, portals and other web interfaces that must work reliably across browsers.
Core ecosystem
The library is commonly used with HTML, CSS and JavaScript, often alongside AJAX, JSON and REST APIs. Its ecosystem includes jQuery UI for interface widgets, jQuery Validation for form checks and a large collection of plugins. Strong specialists also understand browser events, the DOM, accessibility, responsive layouts and package or asset management.
Typical projects
- Add dynamic filtering, search and form behaviour to established websites
- Connect server-rendered pages to APIs through AJAX requests
- Maintain customer portals, content systems and internal business tools
- Replace fragile plugins and improve front-end interaction flows
- Integrate jQuery components with HTML, CSS and existing JavaScript
When expertise helps
Companies bring in freelance specialists when an established application depends on jQuery and internal teams need focused support. This is common during a front-end modernisation, a redesign, a browser-compatibility review or an API integration. In Dusseldorf, remote collaboration can extend local product and agency teams, while on-site work may help when requirements involve workshops or legacy systems.
Quality signals
A capable professional does more than write selectors and event handlers. They isolate global dependencies, manage asynchronous states, prevent duplicate bindings and keep plugin usage controlled. They test across relevant browsers, preserve accessibility and explain how changes fit the existing JavaScript architecture.
Working with modern stacks
jQuery can coexist with server-rendered applications, REST services and newer JavaScript frameworks, but the boundaries should be clear. Strong specialists know when to retain a stable jQuery layer, when to refactor it and when a component should move to another approach. They document dependencies, reduce technical debt and leave maintainable code for the next team.
Frequently asked questions
Key details about jQuery, drawn from the questions we get asked most.
jQuery is used to manipulate the DOM, handle browser events, validate forms, create animations and make asynchronous requests. It remains common in established websites, server-rendered applications, portals and internal tools that need targeted interface behaviour.
jQuery adds behaviour directly to existing HTML and is often a practical choice for incremental changes. React and Vue provide more structured component models for larger application interfaces, so the right option depends on the current codebase, migration goals and team skills.
jQuery work usually requires solid HTML, CSS and JavaScript knowledge, including the DOM and event model. Experience with AJAX, JSON, REST APIs, browser testing, accessibility, responsive design and server-rendered templates is also valuable.
jQuery projects need a specialist who can assess the existing front end before changing it. A focused enhancement may require limited support, while a legacy-system migration calls for deeper skills in dependency mapping, testing, performance and JavaScript refactoring.
jQuery tasks are often well suited to remote collaboration because source code, browser tests and requirements can be shared digitally. Teams in Dusseldorf may still prefer on-site sessions for discovery workshops, close coordination with product teams or access to internal systems.
jQuery can be sensible when a stable application already uses it and the goal is a contained improvement rather than a full rewrite. It can reduce delivery risk when the team understands its conventions and avoids adding unnecessary plugins or overlapping front-end patterns.
jQuery quality is visible in clear event handling, limited DOM work, safe asynchronous flows and predictable error states. Review test coverage, browser compatibility, accessibility, plugin dependencies and whether the specialist explains trade-offs instead of only demonstrating a working screen.
jQuery specialists should ask which version, plugins, browsers and build process the application uses. They should also clarify whether the assignment covers maintenance, new interface behaviour, API integration or migration, and how changes are reviewed and released.
The average hourly rate of freelancers in Dusseldorf, Germany who have used jQuery in their recent projects is 90 €, which corresponds to a daily rate of about 720 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used jQuery in their recent projects, 71% hold at least a Bachelor's degree, 43% hold at least a Master's degree, and 29% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used jQuery in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Dusseldorf, Germany who have used jQuery in their recent projects are German (100%), English (100%), and French (20%).
The most common industries among freelancers in Dusseldorf, Germany who have used jQuery in their recent projects are Information Technology (100%), Manufacturing (50%), and Government and Administration (50%).
The most common business areas among freelancers in Dusseldorf, Germany who have used jQuery in their recent projects are Information Technology (100%), Product Development (100%), and Operations (60%).
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 Request a free demo
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Philipp Thomaschewski
FRATCH CEO
