Hire Ext JS Developer

Ext JS
Build complex, scalable, and high-performance enterprise-grade web applications with skilled Ext.js specialists from Upstaff.
Utilize the extensive library of pre-built UI components, MVC/MVVM architecture, and powerful data handling tools to rapidly develop interactive and functional applications.
Reduce development time and ensure stable application performance across various platforms and browsers, leveraging Upstaff’s expertise in
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48 hours average start
Ext JS

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Node.js 10yr.
JavaScript 15yr.
MongoDB 8yr.
Linux 8yr.
RDBMS 5yr.
PHP 4yr.
Docker 3yr.
Express 2yr.
Ext JS 2yr.
React 2yr.
AWS ElasticSearch 2yr.
Redis 2yr.
AWS 2yr.
NestJS
...

• 15+ years JavaScript programming • Over 10 years in Node.JS programming • Familiar with React.js • Experience building highly scalable distributed web applications and browser extensions • Extensive experience with REST services • Strong communication and cooperation skills • Solid experience as a Backend developer • Fluent in English, written and spoken • long Term experience in remote work with USA and Europien companies • Self-directed person, with proven ability to manage goals and deadlines effectively

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Seniority Expert (10+ years)
Location Belarus
AEM
Java
React
Ajax
CSS
HTML
jQuery
Angular
Ext JS
Node.js
Apache Sling
Java Server Pages (JSP)
Java Servlets
JPA
JSF
JSTL
Handlebars.js
Mustache
MongoDB Compass
PostgreSQL
AEM DAM
AEM Dispatcher
AEM Email API
AEM HTL
AEM Job Scheduler
AEM Search Functionality
AEM Sightly
CQ5
Apache HTTP Server
Apache Tomcat
Apache Maven
JUnit
Mockito
Apache NetBeans
Eclipse
IntelliJ IDEA
Microsoft Visual Studio Code
Apache Subversion
Git
SVN
Gradle
OSGi
...

Experienced engineer with 11 years of experience in the following areas: - Adobe AEM Lead Developer (AEM 5.6 Lead Developer Certified) - Java, JavaScript (React), Vanilla JS - AEM Component creation (UI as well as server-side), including both reusable and page components with best in standard coding practices - AEM DAM (Digital Asset Management) - Servlet, Job Scheduler, Search Functionality, Email API, Sightly - Workflow implementation - MSM-Creation of multilingual sites using live copy - Selective Dispatcher cache invalidation - Unit testing frameworks, such as JUnit and Mockito. - Source control management tools, such as Apache Subversion, Git - Well-versed with a technical understanding of Extjs, Apache sling, and OSGi, needed for the development of an AEM project, starting from scratch. - Involved in Design, Coding, Testing, Code review, and performance tuning of code and queries.

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Seniority Senior (5-10 years)
Location India
JavaScript 5yr.
Web3.js
React
WebRTC
Ant Design 5yr.
Java
TypeScript
OpenAI
Ajax
Bootstrap
Bootstrap 4
CSS
CSS3
HTML
Material UI
SCSS
Socket.io
Storybook
Styled components
Tailwind CSS
Ethers.js
i18next
Mobx
React Hooks
React Query
Redux
Redux Thunk
Redux-toolkit
Zustand
Express
Ext JS
GatsbyJS
NestJS
Next.js
Node.js
MongoDB
PostgreSQL
Blockchain
seo
Agile
Clean Architecture
Kanban
Scrum
Cypress
Jasmine
Jest
Mocha
React-testing-library
Unit Testing
dApps
Hardhat
Solana
Docker
Problem Solving
WebSockets
Chakra UI
React-hook-form
WAGMI
...

- 5+ years of experience as a Front-end JavaScript Developer; - 5+ years of experience in React.js; - Proficient in Solana Blockchain operations, including managing deposits, executing transfers, creating Phantom wallets, and handling contract call interactions; - Strong abilities working with Web3; - Deep experience in Next.js technology; - Experience with WebRTC, Soket.io; - Good knowledge of Tailwind CSS, Bootstrap, and Chakra UI; - Experience working with Redux, and Docker; - Familiar with Node.js; - Proficiency in testing frameworks like Jest and Cypress; - E-commerce, web, and mobile applications, including learning platforms, chatbots, dApps, and cryptocurrency wallet extensions.

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Seniority Senior (5-10 years)
Location Castel San Giovanni, Italy
AEM
Java
JavaScript
Angular
AngularJS
Backbone.js
Ext JS
jQuery
Node.js
React
Apache Sling
Struts
FindBugs
Hudson
JCR
JDBC
JDK8
Jsoup
CSS
HTML
Twitter Bootstrap
XSLT
Handlebars.js
MongoDB
MySQL
Oracle Database
PL/SQL
AWS EC2
AWS S3
Agile
BDD
Scrum
TDD
Apache HTTP Server
Apache Tomcat
Internet Information Services (IIS)
J2EE
Jetty
Oracle WebLogic Application Server
Apache Maven
JUnit
Mockito
Atlassian Confluence
IBM Rational ClearCase
Jira
Slack
Bamboo
SonarQube
BitBucket
CVS
Git
Stash
SVN
Eclipse
IntelliJ IDEA
Notepad++
Log4j
macOS
Oracle Solaris
Windows
putty
Splunk
Akamai
Brackets.io
CheckStyle
Felix
JAAS
OSGi
PMD
Site catalyst
VSS
Websphere
...

- 14 years of AEM experience in design, development, integration, and delivery of small to large-scale enterprise-level applications. - An experienced solution architect with a keen interest in business domains, hands-on in technology-based solutions, and a strong focus on delivering measurable value. - Industry Experience: Vast industry experience covering aviation, telecommunications, media, finance, retail, mutual funds, and services sectors. - Technical skills: Best-in-class analytical and problem-solving skills with a track record of on-time and within-budget delivery. - Soft skills: Ability to build strong personal and professional relationships using excellent interpersonal skills. - E-commerce and AEM Expertise - Certificated Adobe Experience Architect, Components Developer, ManagerAreas of expertise include: - Digital transformations including Content Management Systems (CMS) like Adobe Experience Manager (AEM/CQ5). - Application/Software development right from inception to implementation - Implementation strategies, planning, and execution - Agile methodologies such as continuous integration and continuous delivery, features/domain-driven development, extreme programming - Worked with esteemed customers like ANZ Bank, Old Mutual Group (South Africa), Ford, Farmers Insurance, Aegon Insurance, LaQuinta, Cummins, and AT&T in consulting roles - Fluent English

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Seniority Senior (5-10 years)
Location Melbourne, Australia
PHP
Laravel
Drupal
JavaScript
Ext JS
jQuery
HTML
XML
Symfony
PHPUnit
Xdebug
GTM
MongoDB
MySQL
SQL
DigitalOcean
Docker
Vagrant
SAP
Facebook API
Payment Gateways
RESTful API
Git
Linux
macOS
Windows
Selenium Webdriver
SOAP
Blackfire.io
CRM
OOP/MVC
xhprof
...

- About 10 years of experience in development- Upper-Intermediate English- Ready to start ASAP- Available Part-time - No vacation plans- Location: Moldova

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Seniority Senior (5-10 years)
Location Republic of Moldova
SQL 5yr.
JavaScript 4yr.
Node.js 4yr.
Express 4yr.
NestJS 2yr.
Redis 4yr.
TypeScript 2yr.
React 2yr.
Material UI 2yr.
MySQL 2yr.
PostgreSQL 2yr.
Typeorm 2yr.
Jest 2yr.
Ext JS 1yr.
Vue.js 1yr.
AWS 1yr.
WebStorm 1yr.
Python
Angular
AngularJS
three.js
Mongoose
NgRx
React Native
RxJs
GeoJSON
MapBox
MongoDB
Kafka
Prometheus
Telegram API
...

Software engineer with 5+ years of IT experience, starting as an automated systems technician, evolving into a full-stack JavaScript developer. Excelled in backend development, legacy code optimization, and new functionality implementation in complex logistics and CRM applications. Proficient in cutting-edge JS frameworks and a multitude of databases, boasting a track record of building microservices architectures and developing scalable, fault-tolerant systems. Adept at optimizing SQL queries, integrating APIs, and crafting performant web applications with high unit test coverage. The engineer's portfolio includes delivering robust solutions for logistics, casino networks, and educational platforms, demonstrating strong problem-solving capabilities and technical versatility.

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Seniority Middle (3-5 years)
Location Poland
JavaScript 7yr.
HTML5 5yr.
CSS 5yr.
three.js
TypeScript
Angular
Express
Ext JS
Node.js
Material UI
Ruby on Rails
MongoDB
Github Actions
GitLab CI
Janus
YouTrack
...

- Senior Front-End Developer with 7 years of programming experience, specializing in React and highly skilled in HTML5, CSS, Three.js, JavaScript, TypeScript, PostgreSQL, Redux, and Bootstrap, among other front-end technologies. - Proven track record in full-stack web development, evident from the creation and successful implementation of complex web applications like investment analytics, interactive learning platforms, and real-time streaming services. - Holds a robust educational foundation with a bachelor's degree in Computer Systems and Networks from Uzhhorod National University, demonstrating a strong understanding of theoretical and practical aspects of computer science. - Expertise in SDLC, maintaining high-quality standards through the use of GitHub, GitLab, and Youtrack for version control and project management, showcasing adeptness at coding best practices and efficient teamwork. - Hands-on experience in cross-platform development for Smart TV apps, leveraging technologies like ReactJS and ensuring viewer engagement through interactive features. - Profound experience in building responsive and intuitive user interfaces, as shown by front-end development roles across a diverse set of industries including e-commerce, real estate, gaming, and entertainment. - Fluent in English, with an upper-intermediate proficiency level, facilitating effective communication and collaboration within diverse global teams.

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Seniority Senior (5-10 years)
Location Ukraine
Node.js
Ruby on Rails
Ant Design
TypeScript
Crashlytics
Java
JavaScript
jQuery
EJB
Ext JS
React Native
OpenSearch
DigitalOcean
Heroku
Azure DevOps
PayPal API
Spotify
Stripe
Twilio
sendgrid
UPS
...

Highly experienced backend developer with over five years of experience specializing in commercial application development with Node.js, Ruby on Rails, and front-end technologies including React.js. Holds a Master's Degree in Software Engineering from Uzhgorod National University. Proficient with a suite of databases and services such as PostgreSQL, MySQL, MongoDB, ElasticSearch, RabbitMQ and Redis, with a strong command of API integration (Stripe, PayPal, Twilio). Skilled in DevOps practices and cloud platforms like AWS, Google Cloud, and Heroku. Well-versed in multiple programming languages and frameworks, demonstrating significant technical expertise in JavaScript/TypeScript, Node.js, Nest.js, and Ruby. Successfully applied a deep understanding of software engineering principles, SDLC, and development patterns to a variety of complex projects across different domains.

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Seniority Senior (5-10 years)
Location Uzhgorod, Ukraine

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Ext JS Tech Radar

Talk to Our Expert

Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.
Manager
Maria Lapko
Global Partnership Manager

Why Upstaff

Upstaff is a technology partner with expertise in AI, Web3, Software, and Data. We help businesses gain competitive edge by optimizing existing systems and utilizing modern technology to fuel business growth.

Real-time project team launch

<24h

Interview First Engineers

Upstaff's network enables clients to access specialists within hours & days, streamlining the hiring process to 24-48 hours, start ASAP.

x10

Faster Talent Acquisition

Upstaff's network & platform enables clients to scale up and down blazing fast. Every hire typically is 10x faster comparing to regular recruitement workflow.

Vetted and Trusted Network

100%

Security And Vetting-First

AI tools and expert human reviewers in the vetting process is combined with track record & historically collected feedbacks from clients and teammates.

~50h

Save Time For Deep Vetting

In average, we save over 50 hours of client team to interview candidates for each job position. We are fueled by a passion for tech expertise, drawn from our deep understanding of the industry.

Flexible Engagement Models

Custom Engagement Models

Flexible staffing solutions, accommodating both short-term projects and longer-term engagements, full-time & part-time

Unique Talent Ecosystem

Candidate Staffing Platform stores data about past and present candidates, enables fast work and scalability, providing clients with valuable insights into their talent pipeline.

Transparent

$0

No Hidden Costs

Price quoted is the total price to you. No hidden or unexpected cost for for candidate placement.

x1

One Consolidated Invoice

No matter how many engineers you employ, there is only one monthly consolidated invoice.

How to hire with Upstaff

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Talk to Our Talent Expert
Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.
Seniority
Meet Carefully Matched Talents
Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person.
Seniority
Validate Your Choice
Bring new talent on board with a trial period to confirm you hire the right one. There are no termination fees or hidden costs.

Trusted by Businesses

Upstaff operates as a partner, not just an agency. Express that they aim for long-term cooperation and are dedicated to fulfilling client requirements, whether it’s a short one-month project or a more extended collaboration.
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Want to hire Ext JS developer? Then you should know!

Table of Contents

Find Ext JS Developers with Upstaff

Are you seeking a skilled Ext JS developer to bring your complex, data-intensive web applications to life? Upstaff can help you find experienced Ext JS engineers who specialize in crafting responsive, scalable interfaces using the Sencha Ext JS JavaScript framework. These developers are proficient in creating dynamic grids, forms, charts, and other data-centric components using Ext JS’s powerful MVC architecture and component-based design, enabling your applications to handle large datasets and deliver a smooth user experience.

Our Ext JS developers have a deep understanding of building sophisticated user interfaces that seamlessly integrate with backend systems using AJAX or REST APIs, ensuring your application remains performant and responsive even under heavy loads. They are experienced in modernizing legacy systems or building new applications from scratch using Ext JS, with a focus on delivering enterprise-grade solutions tailored to your project’s requirements.

Ext JS development is not for everyone. It requires a deep understanding of JavaScript, experience in building high-performance, cross-browser compatible applications, and an eye for detail. Our Ext JS developers are carefully screened for their technical skills in Ext JS, JavaScript, and related technologies, as well as their experience with the frameworks and libraries you’ll be using. We ensure they’re the right fit for your project by considering their portfolio, client feedback, and problem-solving abilities.

We’ve worked with developers who have experience in various industries, such as finance, healthcare, and enterprise software, and have tackled a wide range of projects, from real-time dashboards and data visualization tools to complex CRM systems and inventory management applications.

Our Ext JS Developers’ Expertise

Ext JS is a JavaScript framework used for building feature-rich, data-intensive web applications. The main strengths of Ext JS are its rich set of components and its powerful and flexible architecture, making it suitable for building enterprise-level web applications that require scalability, reliability, and maintainability. Some of the areas our developers specialize in include:

Complex UI Design

Ext JS is known for its powerful UI components, so our developers can help you build interactive grids, charts, forms, and more that can handle large amounts of dynamic data with ease.

Backend Integration

Our developers can integrate your Ext JS frontend with server-side applications and APIs, using technologies such as AJAX, REST, or GraphQL, to create seamless and responsive user experiences.

Performance Optimization

Ext JS applications can be optimized for performance by our developers, to ensure they remain responsive even under heavy data loads or with multiple concurrent users.

Migration and Upgrades

Our developers can help migrate legacy applications to newer versions of Ext JS, or to other frameworks if needed, to improve performance, security, and maintainability.

Examples of past projects include building customizable financial dashboards with real-time data updates and analytics, developing enterprise-grade applications with complex data visualizations and reporting features, and creating web applications with secure, role-based access control and dynamic forms for data entry and management.

The Hiring Process with Upstaff Made Easy

Finding an Ext JS developer to hire is fast and painless with Upstaff. We offer personalized support and a fully customizable process to match you with the ideal candidate:

Discovery Call

Our 30-minute consultation will help you identify the technical needs of your project, the specific challenges you’re facing, and what you expect from your team members in terms of skills, experience, and personality.

Candidate Matching

We’ll take your criteria and search our network of pre-vetted Ext JS developers for candidates that fit. In 1-3 days, we’ll send you a list of candidates. This service is free.

Interviews and Selection

From the list we provide, you can review the candidates’ profiles and take them for interviews to select the best candidates for your team.

Onboarding and Support

If you need help with onboarding the new member of your team, we’re here to help. We provide unlimited supervision and support for free, including performance monitoring and replacements, if needed.

Ongoing Support and Supervision

We provide support beyond the initial search and hiring process, including:

Technical Alignment

Technical experts are available to help you nail down your project requirements to ensure they’re clear, concise, and technically sound.

Quality Assurance

We offer ongoing code reviews to ensure your project is developing as planned and to ensure your team is adhering to Ext JS best practices and coding guidelines.

Flexible Scaling

You can scale your team to meet the project’s demands at any time. We have no hidden fees or long-term commitments, and provide 24/7, no-cost support.

Dedicated Oversight

Optional project management and supervision services are available to keep your project on track, according to your preferences.

Showcase of Projects

Our Ext JS developers have helped clients in various industries to develop robust, scalable, and feature-rich applications, such as:

  • A customizable, dynamic dashboard for a financial analytics platform, featuring real-time data grids and advanced charting capabilities.
  • A web application for a Fortune 500 company, which required secure, role-based access control, dynamic forms for data entry and management, and complex data visualizations for reporting and analytics.
  • An e-commerce dashboard with integrated analytics, reporting, and customizable UI components for enhanced user engagement.
  • An Ext JS CRM system with custom workflows, reporting, and third-party integrations for a large enterprise client.

With over 13 years of collective experience and 300+ successful projects, our developers have the expertise and experience to build your next Ext JS application.

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Talk to Our Expert

Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.
Manager
Maria Lapko
Global Partnership Manager

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