Ext JS Experts in Germany
matched in minutes by AIHire experts who deliver data-rich web applications, reusable Ext JS components and reliable Sencha-based interfaces. FRATCH matches you quickly and precisely with vetted, available freelancers for your project.
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.
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
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
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
Frank B.
Last position:
Software Engineer at Freelancer
- Freelance Software Engineer with a focus on backend (Python/Django) and frontend (VueJS).
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
Peter S.
Last position:
Human IT Service GmbH
- Project: Citizen participation portal
- Technologies: HTML, CSS, TypeScript, Angular, SvelteKit, Rust, leaflet, osm
- Tasks: Design, technical decisions, implementation
- Focus: Frontend, development, UX, design, maintenance
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)
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 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany 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 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 29 Oct 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 provides a broad set of user interface components, including grids, forms, trees, charts, windows and navigation elements. Its conventions help teams create consistent business software with less custom interface code.
Sencha ecosystem
Ext JS is part of the Sencha ecosystem and works with tools such as Sencha Cmd, Sencha Architect and Sencha Fiddle. Specialists often handle framework configuration, component inheritance, data stores, models, proxies, views and controllers. They may also connect Ext JS interfaces to REST APIs, Java services, .NET systems or other enterprise back ends.
Typical applications
- Operations dashboards with filters, charts and live data
- Customer, inventory and order management interfaces
- Scheduling, planning and workflow applications
- Internal portals with permissions and complex forms
- Legacy Ext JS applications that need controlled modernization
Ext JS is suited to applications where dense information, keyboard navigation and predictable interaction matter more than a marketing-style front end.
When to bring in experts
Companies usually seek freelance expertise when an existing Ext JS application needs a major feature, performance work or a framework upgrade. Specialists can also establish a component structure for a new application, replace fragile custom code, or investigate rendering, memory and data-loading issues. German companies may value professionals who can work with local product teams on site or remotely and communicate clearly in English or German.
Skills that matter
Strong professionals understand more than the visible components. They can design stores and models, manage asynchronous requests, structure large view hierarchies and control state across complex screens. Useful adjacent skills include JavaScript, TypeScript, HTML, CSS, REST, JSON, testing, browser profiling and accessibility. Experience with build pipelines and source control supports dependable delivery.
How quality is assessed
Look for specialists who can explain why they chose a component design, data flow and loading strategy. A sound portfolio should show maintainable grids, forms or dashboards rather than only visual mock-ups. Ask how they handle framework version changes, slow data sources, browser compatibility, automated tests and incremental delivery. A short technical review of the existing codebase can reveal whether the professional can improve it without disrupting daily operations.
Frequently asked questions
Questions about Ext JS? Start with the answers below.
Ext JS is used for browser-based business applications with complex forms, data grids, dashboards, charts, trees and workflow screens. It is especially useful when users work with large data sets and need consistent navigation, filtering and keyboard support.
Ext JS provides a more integrated set of enterprise UI components and data-handling patterns than React, while Angular offers a broader application framework with a different architecture. The right choice depends on the existing codebase, team skills, component needs and tolerance for rebuilding established screens.
A strong Ext JS specialist usually works comfortably with JavaScript, HTML, CSS, REST APIs and JSON data. Knowledge of Sencha Cmd, testing, browser performance, accessibility, authentication and build automation is valuable for production applications.
The required level depends on the application’s size, framework version and technical risk. A small component change may need focused expertise, while a legacy migration or performance investigation calls for a professional who has handled large Ext JS codebases and can assess them before changing core patterns.
Ext JS projects are often suitable for remote collaboration because requirements, source code and test environments can be shared digitally. Teams in Germany should agree on overlapping working hours, documentation standards, data access and whether German-language communication is needed for workshops or user feedback.
Ext JS can be a strong fit when an application needs many coordinated business components, dense data views, permissions and established enterprise conventions. A lighter library may be preferable for a small public interface or when the team wants to assemble its own component and state-management ecosystem.
A capable Ext JS professional should review the framework version, application structure, stores, models, proxies, build configuration and API behavior. They should also inspect rendering performance, browser support, test coverage and custom overrides before proposing an upgrade or refactoring plan.
Ask the specialist to explain component boundaries, data flow, error handling and how the proposed changes will be tested. High-quality Ext JS work is maintainable, performs well with realistic data, follows the project’s conventions and avoids unnecessary overrides that make future upgrades harder.
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 713 € 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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