Ext JS Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used Ext JS
Khalid El Mansouri
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 Krastillis
Last position:
Tech Lead / Architect : OTTO API Platform at OTTO
maturing their API Practices on both, a Business and Technology level. My role encompasses 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, nodejs, typescript, redocly, reactive programming, CDC, golang, gingonic, GitOps, DX (developer experience), stakeholder management, roadmaps, workshops, discovery.
Christof Hlipala
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 Schulze
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.
Frank Richter
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 Kaurov
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 Girdu
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
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
Stefan Jacomeit
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 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
Aschok Das
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
Peter Schmelzer
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 Herken
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
Frank Bohnsack
Last position:
Software Engineer at Freelancer
- Freelance software engineer focusing on backend (Python/Django) and frontend (VueJS).
René Schmidt
Last position:
CRM Developer at CiS GmbH
- Developed a greenfield CRM for managing incoming customer requests for a municipal utility provider
- Implemented with PHP/Symfony 5, EasyAdmin, Doctrine ORM and Oracle XE
- Handed over to CiS GmbH after initial groundwork as planned
Subash Velusamy
Last position:
SAP Concurr
- Development and support of UI and interface by using React JS, Redux, Hooks, TypeScript, NodeJS, JavaScript
- Worked on front-end components and UI tests with Jest and Enzyme
- Worked on REST API using Go and GraphQL
- Implemented efficient and optimized code for improved website performance
- Integrated code quality tools: ESLint and Prettier
- Used Docker, GitHub Actions for CI/CD, Jira, AWS, and Elasticsearch
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
2.2 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
80%
Master's degree or higher
27%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
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 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What Ext JS is
Ext JS is a JavaScript framework for building data-heavy web applications with complex screens, grids, forms, and dashboards. It is often chosen for internal business software where structure, consistent UI behavior, and strong component control matter.
Typical projects
- Admin portals and back-office tools
- Operations dashboards and reporting views
- Form-driven business applications
- Legacy Sencha app maintenance and upgrades
It is common in environments that need dense interfaces and long-lived browser applications. In Germany, it often appears in enterprise teams that keep critical internal systems running.
Ecosystem and skills
Strong specialists know the Ext JS component model, data stores, layouts, and event handling. They also work comfortably with JavaScript, TypeScript where relevant, REST APIs, and browser debugging tools.
Good work with Sencha Ext JS usually includes:
- Clean component architecture
- Reliable data binding and grid behavior
- Reusable UI patterns
- Careful performance tuning
When companies bring in help
Companies usually look for freelance expertise when an app is hard to change, needs a release under time pressure, or depends on a small internal codebase. Ext JS projects can slow down when older custom patterns, missing documentation, or fragile widgets make updates risky.
A specialist helps restore control without a full rewrite.
What strong professionals deliver
A strong Ext JS professional does more than fix UI bugs. They can trace data flow through stores and models, clean up event logic, and stabilize screens that have grown over many release cycles.
They also think about maintainability, not just the visible result. That matters when a business app must stay usable while features keep changing.
Working with remote teams
Ext JS work can be done remotely when the scope is clear and access to the codebase is in place. For Germany-based teams, it is still useful to have overlap with product owners, QA, and internal specialists who know the business logic.
The best freelancers document their changes well and leave the application easier to hand over.
Frequently asked questions
Questions about Ext JS? Start with the answers below.
Ext JS is used for browser-based business applications with dense screens, data grids, forms, filters, and reporting views. It fits internal tools, admin portals, and operations software where structured UI behavior matters more than a lightweight page layout.
Ext JS is more opinionated and comes with a rich component set aimed at enterprise interfaces. React and Angular are often chosen for broader app ecosystems, while Ext JS is attractive when the team wants built-in grids, layouts, and a more complete UI framework for business software.
Yes, Ext JS is commonly referred to as Sencha Ext JS because of its vendor history. Searchers also use the shorter name ExtJS, especially when looking for specialists who can maintain older applications or work on Sencha-based projects.
A strong Ext JS specialist usually knows modern JavaScript well and understands REST APIs, browser debugging, and structured state handling. Experience with legacy codebases, UI testing, and backend integration is also useful because many projects depend on stable data flow.
Ext JS projects often need someone who has worked on real applications with grids, forms, and custom components, not just small demos. The right depth depends on the task: maintenance and bug fixing need strong framework knowledge, while a rewrite or modernization needs broader architecture skills.
Bring in Ext JS expertise when the codebase is older, the UI is brittle, or the team needs a focused delivery window. Freelancers are especially useful for legacy support, component cleanup, upgrades, and solving issues that block other work.
Yes, Ext JS work is often remote, especially when the freelancer can access the repository, test environment, and existing documentation. For German teams, it helps if the specialist can collaborate clearly in English or German and join planning calls when business logic is complex.
Look for evidence that the Ext JS freelancer has shipped maintainable UI work, handled data-heavy screens, and improved existing code instead of only creating new pieces. Good signs are clear explanations of component structure, thoughtful handling of store logic, and careful attention to handover and documentation.
The average hourly rate of freelancers in Germany who have used Ext JS in their recent projects is 90 €, which corresponds to a daily rate of about 716 € based on an 8-hour working day.
Of the freelancers in Germany who have used Ext JS in their recent projects, 80% hold at least a Bachelor's degree and 27% 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 2.2 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 (48%), and Automotive (43%).
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 (65%).
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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Philipp Thomaschewski
FRATCH CEO
