Ext JS Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used Ext JS
Khalid E.
Last position:
Lead Architect & Developer at kem-consulting
Development of an agent-based governance platform for the automated assurance of EU AI Act compliance and ODA-compliant orchestration of AI services in complex enterprise environments.
Design and implementation of an agent-based "Mission Control" framework (Aletheia Conductor) for autonomous state monitoring and process control.
Development of "Compliance-as-Code" (CaC) solutions based on OPA/Rego for system-wide enforcement of regulatory guardrails.
Integration of TM Forum ODA standards (TMF630, TMF622, TMF642) to ensure interoperability and standardization.
Building a highly available event-driven architecture using Redpanda and CloudEvents v1.0 for near-real-time event processing.
Implementation of an audit-proof "Evidence Chain" through cryptographic linking of trace logs in preparation for automated audits.
Tech Stack: Java 21 (Quarkus Native), TypeScript (Next.js), Redpanda (Kafka API), CloudEvents v1.0, OPA (Open Policy Agent) & Rego, TimescaleDB, ZincSearch, Redis, TM Forum ODA, Git, GitHub, Clean Code Development, Like-C4.
Kiriakos K.
Last position:
Tech Lead / Architect : OTTO API Platform at OTTO
Maturing their API practices on both a business and technology level. My role covers strategy, architecture, developer advocacy as well as hands-on software engineering, enabling both technical teams and business leadership to adopt and act on API-centric principles effectively. Coincidentally, we also establish GitOps, DX and platform best practices with this project.
Highlights:
- Aligning executives with the initiative by clarifying strategy, replacing misconceptions and myths with facts, clarifying the value of existing assets and enabling informed decision-making
- Formulating a way forward for API Lifecycle Management at OTTO
- Driving platform progress and fostering developer engagement by hands-on engineering work towards strategic goals
API Lifecycle Management, Team Topologies, Organizational Evolution, Regulatory, Platform Advocate, Developer Platform, Communities of Practice, Terraform, Kotlin, Kafka, Kong, WSO2, Apigee, Gravitee, Backstage, AsyncAPI, OpenAPI, API Design, AWS, React, Node.js, TypeScript, Redocly, reactive programming, CDC, Golang, Gin, GitOps, DX (developer experience), stakeholder management, roadmaps, workshops, discovery.
Christof H.
Last position:
Senior Frontend Developer at HUK24 AG
- Designing new apps as well as enhancing and running 29 Angular apps for digital claims in an Nx monorepo
- Maintaining and improving a shared component library with ~300 libraries for multiple product teams
- Migrating all apps to a new design system including its component library and systematic refactoring
- Developing and maintaining the CI/CD pipelines (Jenkins, Azure DevOps, Terraform, AWS)
- Managing releases independently including branch handling, versioning, PR coordination and production deployment
- Implementing and maintaining tracking (Adobe Analytics)
- Ensuring accessibility according to BFSG/WCAG
- Test-driven development (TDD) with Jest and Cypress
- Code reviews, mentoring and setting up best practices in the team
- Technologies: TypeScript, Angular 16-20, RxJS, NgRx, Nx (Monorepo), npm, HTML, (S)CSS, Storybook, Jest, Cypress, Cucumber, Husky, Node.js, Git, AWS, Azure DevOps (Repos & Pipelines), Jenkins, Terraform, TDD, BFSG, WCAG, Nexus, IntelliJ, Adobe Analytics
Alexander S.
Last position:
AI Consultant for AI Voice Bot System at Rudolf Hörmann GmbH & Co.KG
- Consultant for system architecture, AI agents & integration, coach for data & process logic, Graph-RAG approaches, security and data protection.
- On-premise AI solutions with high compliance and performance requirements.
- Architecture decisions, operational setup, strategic prioritization & deployment.
- Technologies: LiveKit JS SDK, LiveKit Agents, Web Audio API, JS, AudioWorklet, Loki, vLLM, Zscaler, Docker, Neo4j, MySQL, Python.
- Models: GPT-OSS 20B, Whisper large v3 turbo, Qwen3-TTS.
Stefan J.
Last position:
PHP / Symfony Fullstack Developer via temporary staffing at N.V.L. Group
- PHP legacy and Symfony 5+ development of N.V.L. Group's own ERP from PHP 7.4 onward including Oracle SQL, RabbitMQ, React and ExtJS
- Use of Docker and GitLab to manage containers and source code
- Implementation of unit, integration and functional tests
- Frontend development with React and ExtJS in Docker containers via GitLab
Frank R.
Last position:
eCommerce Software Developer at WirTube-Shop
- Maintenance and system handover
- Planning and carrying out core and plugin updates
- Developing a plugin to extend invoice creation and payment via Flow Builder
Eugene K.
Last position:
Lead PHP Web Developer at Deutscher Fachverlag GmbH
- PHP application development for the following news portal CMS:
- lebensmittelzeitung.net
- textilwirtschaft.de
- horizont.net
- iz.de
- fvw.de
- ahgz.de
- horizont.at
- agrarzeitung.de
- food-service.de
- fashionmagazine.it
Roxana G.
Last position:
Freelance Senior Frontend Developer at RHI Magnesita
- Designed and developed a high-performance internal resource management platform using React and TypeScript, optimizing dynamic data rendering and state management.
- Built a React Native application to support mobile access to internal tools, enabling on-the-go project tracking for field teams.
- Developed custom 2D canvas-based visualizations using Pixi.js to simulate material flows and refractory layer behaviors.
- Integrated Pixi.js with React components for interactive diagrams and real-time UI updates.
- Developed interactive 3D visualizations using React.js for displaying refractory product layouts and simulations, supporting engineering and sales teams with dynamic product previews.
- Integrated Three.js within the React ecosystem to allow manipulation of 3D models in real-time via browser, enhancing user engagement and field configurability.
- Integrated a headless CMS to enable dynamic content updates by non-technical users, reducing content deployment time by 40%.
- Led AWS CloudFront optimization initiatives, improving portal load speeds by 30% globally.
- Actively collaborated with cross-functional Agile teams and product owners to deliver prioritized features with a fast feedback loop.
- Key Technologies: React.js, React Native, Three.js, TypeScript, Contentful CMS, AWS S3/Lambda/CloudFront, Cypress, Agile Scrum
Thomas H.
Last position:
Software Developer at IT-Spoon GmbH
- Full-stack development of new applications as well as error analysis and fixing
- Refactoring to a framework
- Customization of shop software
- Connecting the SAP interface and exporting data to the shop
- Production control with time scheduling
- Connecting invoicing to ZUGFeRD (electronic invoice transmission)
- Technologies used: PHP, MySQL, Symfony, Laravel, JS, jQuery, MSSQL, ZUGFeRD
Michael M.
Last position:
Deutsche Bahn
- Implemented accessibility audit recommendations for the ICE onboard portal to improve usability for screen reader and keyboard users
- Migrated end-to-end tests from Cypress to Playwright
- Refactored components to meet accessibility standards
- Introduced Prettier for consistent code formatting
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
Aschok D.
Last position:
Fullstack Developer at Netkitchen GmbH
- Backend & Frontend development (Full-Stack)
- PHP, MySQL, Laravel, Symfony, Twig, Vue.js, ExtJS, jQuery, JavaScript/TypeScript, HTML5, CSS3, Smarty
- Fact-Finder, Git, Jira, Jenkins, Scrum
- Based on Shopware 5 & 6
- ERP system integration
- Experience with REST APIs
- Developed a Laravel script to migrate all data (products, product images, orders, customers, prices, etc.) from Shopware 5 to Shopware 6
- Able to develop any kind of Shopware 6 and Shopware 5 plugins
Markus B.
Last position:
Managing Director / Software Architect / Project Manager at droxIT GmbH
- Development of solutions in search, data processing, and analysis (interfaces, search forms, analysis)
- Project work in sales, procurement, and communications (development and management of API, web application, and mobile application implementations)
Peter S.
Last position:
Human IT Service GmbH
- Project: Citizen participation portal
- Technologies: HTML, CSS, TypeScript, Angular, SvelteKit, Rust, Leaflet, OSM
- Tasks: Conceptual design, technical decision-making, implementation
- Focus: Frontend, development, UX, design, maintenance
Daniel H.
Last position:
Full Stack Developer
- Developed various new features based on the requirements of end users and business units.
- Implemented style guidelines based on user feedback and the application's existing look and feel.
- Created the necessary backend microservices to fetch and manipulate data and to generate invoices.
- Reviewed and adjusted Terraform configurations for Google Cloud.
- Created and maintained automated UI, integration, and end-to-end tests.
Technologies used:
- Frontend: JavaScript, TypeScript, HTML, CSS, Vue.js, Vuex, Vuetify, SCSS, Vite, Jest, Cypress
- Backend: Java, Kotlin, Spring Boot, JUnit
- Hosting: Google Cloud, Terraform, Kubernetes, Firebase
Discover over 15,000 top freelancers
Statistics of experts using Ext JS
Aggregated from the professional profiles of matched freelancers.
Experience
20 years
Position duration
2.4 years
Positions per freelancer
14
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Retail, Automotive
Certification focus areas
Information Technology, Product Development, Business Intelligence
Bachelor's degree or higher
81%
Master's degree or higher
31%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
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 Germany 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 Germany using Ext JS
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.
Ext JS 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 (96%)
- Retail (50%)
- Automotive (42%)
- Banking and Finance (42%)
- Media and Entertainment (38%)
- Healthcare (33%)
- Transportation (33%)
- Manufacturing (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Ext JS does
Ext JS is a JavaScript framework for building structured, data-intensive web applications. It combines a component library with grids, forms, charts, trees, windows and layouts that support complex business workflows. Teams use it for internal systems, customer portals, administration tools and long-lived enterprise applications.
Core components
The framework provides a consistent model for assembling screens and managing interaction. Strong specialists work confidently with its data packages, stores, models, views, controllers, routing and class system. They also understand how component configuration, events and lifecycle behavior affect performance and maintainability.
Typical projects
- Interactive dashboards with charts, filters and export functions
- Data-heavy grids with sorting, grouping, paging and inline editing
- Workflow applications with forms, permissions and validation
- Portals and back-office tools connected to business APIs
Ext JS is often selected when a consistent interface and rich client-side behavior matter more than a minimal frontend stack.
Ecosystem and integration
Ext JS is part of the Sencha ecosystem and is commonly used with Sencha Cmd, Sencha Architect and Sencha Themer. Professionals connect applications to REST or SOAP services, authentication systems and enterprise databases through backend APIs. Knowledge of JavaScript, HTML, CSS, TypeScript and build pipelines helps keep delivery reliable.
When to hire expertise
Companies bring in freelance specialists when an existing Ext JS application needs modernization, a release is blocked by difficult UI behavior or internal knowledge is limited. They can assess legacy code, migrate older Ext JS or Sencha patterns, create new modules and improve loading, rendering and data handling. For teams in Germany, remote work is practical, while on-site workshops can help with domain discovery and stakeholder alignment.
What quality looks like
A strong professional translates business processes into clear component structures instead of merely assembling widgets. They test stores, forms, permissions and failure states, keep shared components reusable and document decisions that future teams can follow. Look for experience with the relevant Ext JS release, browser support, API contracts and the application’s build and deployment process. Clear communication in English or German can also simplify collaboration with teams in Germany.
Frequently asked questions
Questions about Ext JS? Start with the answers below.
Ext JS is used to build rich web applications with complex interfaces and substantial business data. Common examples include dashboards, planning tools, customer portals, reporting systems and internal administration software.
Ext JS provides a broad set of enterprise UI components and an integrated approach to data handling, layouts and application structure. React, Angular and Vue offer different levels of flexibility and ecosystem choice, so the best option depends on existing code, interface complexity, team skills and delivery goals.
A capable Ext JS specialist should understand JavaScript, HTML, CSS, browser behavior and API integration. Experience with Sencha Cmd, Sencha Architect, REST services, authentication, testing and build automation is useful for complete project delivery.
The right Ext JS experience depends on the application’s age, size and technical condition rather than a fixed number of years. A small feature may need strong component and data knowledge, while a legacy migration calls for someone who can trace inherited class structures, upgrade risks and integration constraints.
Ext JS work is often well suited to remote collaboration because code, tickets, environments and API documentation can be shared online. On-site sessions may still help with workshops, access setup or complex process discovery, especially when teams in Germany need close coordination.
Ask a Ext JS freelancer to explain a comparable interface, the data flow behind it and the trade-offs made for performance and maintenance. Review examples of grids, forms, reusable components and testing, then discuss how they handle legacy code and browser-specific issues.
Ext JS can support gradual modernization when an application already depends on Sencha components and established data models. A specialist should first map the current architecture, dependencies and release constraints, then recommend targeted refactoring, version upgrades or a staged replacement.
Maintainable Ext JS applications use clear class boundaries, reusable components, predictable stores and explicit event flows. Quality also depends on accessible forms, resilient API handling, automated tests and documentation that explains framework-specific decisions.
The average hourly rate of freelancers in Germany who have used Ext JS in their recent projects is 89 €, which corresponds to a daily rate of about 714 € based on an 8-hour working day.
Of the freelancers in Germany who have used Ext JS in their recent projects, 81% hold at least a Bachelor's degree and 31% hold at least a Master's degree.
On average, freelancers in Germany who have used Ext JS in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Germany who have used Ext JS in their recent projects are German (100%), English (100%), and French (13%).
The most common industries among freelancers in Germany who have used Ext JS in their recent projects are Information Technology (96%), Retail (50%), and Automotive (42%).
The most common business areas among freelancers in Germany who have used Ext JS in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (63%).
Main locations of FRATCH Experts, who have recently used Ext JS
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 Request a free demo
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