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¿Qué es Sencha / YahooUI?

Sencha and YahooUI (YUI) are powerful JavaScript frameworks for building rich, interactive web applications. Sencha's Ext JS offers a comprehensive set of tools for developing data-intensive, cross-platform web apps with a consistent look and feel. YUI, developed by Yahoo, provides a robust library for creating dynamic user interfaces and enhancing user experience. If you're looking to create a sophisticated front-end or improve your website's interactivity, a Sencha/YahooUI developer can help bring your vision to life.

Contrata a Sencha / YahooUI Developer

Looking to hire a top-notch Sencha or YahooUI developer? Freelancer is the best place to find highly skilled developers for every budget. With the widest range of Sencha/YahooUI experts, you can easily post your project and connect with professionals ready to tackle your web development needs. Plus, Freelancer's Milestone Payment system ensures you only pay when you're 100% satisfied. Get started today and bring your web application to life!

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Contrata Sencha / YahooUI Developers

Dream Solutions

5,0

458

9,4

99%

Manchester, United Kingdom

$34 USD por hora

Dream Solutions is a team of highly skilled developers, designers, and technology professionals dedicated to delivering exceptional digital solutions. We combine technical expertise, creativity, and a client-focused approach to provide high-quality services and products that meet the highest industry standards. Our team has extensive experience working with a wide range of technologies, frameworks, and software stacks, enabling us to develop tailored solutions that align with our clients unique business goals. Whether it's web development, mobile applications, custom software, UI/UX design, or cloud-based solutions, we are committed to delivering reliable, scalable, and innovative results on time and within budget. At Dream Solutions, we pride ourselves on building long-term partnerships by consistently exceeding expectations through quality, efficiency, and professional excellence.

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Sencha / YahooUI PHP Perl ASP C Programming

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Jojo A.

4,7

176

6,0

100%

Solano, Philippines

$20 USD por hora

I am a passionate Web Developer & Full Stack JS Developer for over 15 years. I started engaging as a Full Stack Javascript Developer for more than 4 years now. I am from the Philippines and has been a full time developer since I started. I am a good problem solver and always learn clients' needs. I believe that all problems have a solution. Programming/Scripting Language: VueJS, NodeJS, PHP, Javascript, Angular 7, ReactJS, jQuery, ExtJS, Perl Databases: MongoDB, MySQL, MSSQL, SQLite, MS Access APIs: Amazon MWS, eBay, Facebook, Twitter, 2CheckOut, Paypal Frameworks: Loopback, Angular, Laravel, CodeIgniter, React, Express, CakePHP, Bootstrap Templating: Blade, Jade, Smarty Others: HTML5, CSS3, Phonegap Opensource: Wordpress, OSCommerce, Zencart, Magento, Joomla, etc...

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Sencha / YahooUI PHP JavaScript XML Script Install

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AIS Technolabs Pvt Ltd

4,8

172

10,0

98%

Ahmedabad, India

$20 USD por hora

✨ Welcome to Our Profile!✨ AIS Technolabs is a leading developer of: ❖ Mobile Applications (Native & Hybrid) ❖ Multi-player Games (Unity 3D, Unreal Engine 5) ❖ Responsive Websites (Open Source, HTML, CSS, JavaScript) ❖ Advanced Solutions in IoT, VR, and AR ✅ Since 2010, we've successfully completed 3200+ projects and built an impressive portfolio that continues to grow. Specialties ✨ We excel in a diverse range of technical expertise—from a simple HTML page to robust Enterprise Solutions. ✅ Website Development: - Front-End: HTML, CSS, JavaScript, Angular.js, React.js, jQuery, SASS - Back-End: PHP, C++, Java, Python, Node.js, Express.js, Django, Ruby on Rails, Laravel, Spring ✅ Mobile App Development: - iOS/Android Apps (Java, Swift) - Cross-Platform Apps (React Native, Ionic App) ✅ Game Development: - Unity3D, Unreal Engine 5 ✅ IoT, Virtual Reality (VR), and Augmented Reality (AR): - Cutting-edge solutions tailored for innovative and immersive experiences ✅ Blockchain & Cryptocurrency Solutions: - Custom Cryptocurrency Development - Cryptocurrency Wallets - Exchange Applications ✅ Worked With Blockchain Leaders: - Tron, Binance Chain, and Ether Chains Successful Projects Completed ★ Games: - RPG, FPS, Casino, Slot Machine, Crash Game, Jackpot, Roulette, Poker, Coinflip, NFT, Sports Betting, Ludo, Card Game, Action, Adventure, Arcade, Shooting, Bingo, Dice, Lottery, Cricket, Racing, Soccer ★ Apps: - Flight Booking, Hotel Booking, Social Media, Dating, Taxi, Live Streaming, IPTV, Money Transfer, Food Delivery, Courier, Chat, Auction, Trading, Booking, Fintech, Finance, Productivity, etc. ★ Software: - ERP, CRM, Project Management, HR Management, Fleet Management, Employee Management, Vendor Management, Inventory Management, Task Management, Staff Management ★ Websites: - Dating, Social Media, Real Estate, eCommerce, Construction, Bakery, Informative, Blog, Business, Corporate ✱ Why Choose Us? We aim to build long-term relationships with our clients. Your satisfaction is our mission! We are just a click away to assist you!

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Sencha / YahooUI PHP ASP C Programming Java

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ASRADesigning

5,0

7,4

95%

Karachi, Pakistan

$40 USD por hora

I'm Muhammad Ashar, a passionate digital creator specializing in immersive experiences across game development, website design, and both 2D and 3D art and animation. With years of hands-on experience, I take pride in delivering high-quality, creative solutions that bring ideas to life. Whether you're looking to build a captivating game, design a modern and responsive website, or create eye-catching visuals and animations, I offer end-to-end services tailored to your specific needs. My Services: Game Development: Designing and developing engaging games for various platforms. Website Development: Creating clean, responsive, and user-friendly websites. 2D & 3D Art: Crafting visually stunning artwork and models for games, media, and more. Animation: Producing dynamic animations that enhance storytelling and audience engagement. Graphic Design: Delivering impactful designs for branding, marketing, and digital media. I'm committed to blending creativity with technology to help bring your vision to life. Let’s work together to turn your ideas into reality.

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Sencha / YahooUI PHP Perl ASP C Programming

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Diego Fernando P.

4,9

5,0

93%

NUÑEZ, Argentina

$20 USD por hora

Hello, I am a developer with 20 years of experience. I have been working as a technical analyst / architect for 5 years, and now I do development work, so I want to expand my horizons working freelance.

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Sencha / YahooUI JavaScript .NET Data Processing Data Entry

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Abdul R.

5,0

6,6

100%

Lahore, Pakistan

$25 USD por hora

Hi! Are you looking for an Adobe Expert who can deliver valuable solutions, save you time, and reduce costs? I, Abdul Raheem, am here to help you! A skilled Full-Stack Developer & Certified ColdFusion Expert with 20+ years of experience in ColdFusion development, web applications, database optimization, and API integrations. I specialize in building high-performance, scalable solutions using technologies like JavaScript, PHP, WordPress, React, Laravel, and Adobe ColdFusion. I can help you with my Services: • ColdFusion Development & Web Applications • SQL & Database Optimization • Performance Enhancement • Security Assurance • Consultation & Strategy • Cloud Services & Migrations • PHP & Laravel Development • Lucee & ACF Migrations • Web Design & Front-End Development Framework Expertise: • ColdFusion: ColdBox, FW/1, CF Wheels, Fusebox • Databases: SQL Server, MySQL, PostgreSQL, Oracle • Security: OWASP ZAP, Snyk, OpenSSL • Cloud & Migrations: AWS, Azure, Docker, Lucee, ACF • Front-End: Vue.js, React.js, Tailwind CSS, Bootstrap • API Development: REST, GraphQL, SOAP Let's collaborate to optimize your ColdFusion projects, databases, and web applications for performance, security, and future scalability. Reach out today, and let's bring your ideas to life! Certified ColdFusion Expert | PHP & Laravel Development | SQL & Database Optimization | Performance & Security Specialist Abdul Raheem

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Sencha / YahooUI Java JavaScript XML Cold Fusion

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Aamir H.

4,7

7,5

90%

Bhopal, India

$17 USD por hora

I am the proven full time cross platform/ hybrid mobile & web developer, I have extensive experience in Ionic 1 to Ionic 8, AngularJS 1 to Angular 19, Dart/ Flutter, Flutterflow, React Native, Firebase, Extjs 3 to Extjs 7, Sencha Touch, Cordova, Phonegap, Capacitor, PHP MySql, jQuery, Responsive Web Design, Jquery Mobile, JavaScript Frameworks, HTML5 css3 Mobile Development, Node.js, PHP-Laravel-Yii-Ci, Core PHP & Smarty. With over a decade of experience, I am still eager to serve well working amazing projects via transforming your ideas into Real-Time Working Systems. I am now specially focusing in AI-driven applications, Social Apps, Real-time Messaging, Blockchain & Crypto and full stack development, I am committed to deliver high-quality results tailored to your business needs. ✅ AI, Social, Blockchain & Crypto & Real-time Messaging ✔️ AI Integrations: Seamless implementation of Chatbots, Voicebots, and AI Assistants using NLP and voice recognition technologies. ✔️ Generative AI: Advanced Text-to-Speech and Text-to-Video solutions for next-gen content creation. ✔️ Secure cryptocurrency, smart contract development, token creation, and blockchain data integration ✔️Live Chat/Video Chat: Real-time text and video (Agora, Twilio & Amazon Chime - "VoIP/ WebRTC SDK'S") ✅ Full Stack Web Development ✔️ Modern Frameworks: Next.js, Node.js, and TypeScript for high-performance, scalable applications. ✔️ FRONTEND: Angular JS, Ionic, Extjs, Sencha Touch, HTML, CSS, Bootstrap & Tilwind ✔️ Scalable Backends: PHP, NodeJS, Laravel, Codeigniter & Smarty, Expertise in Express.js ✔️ DB: MySQL, MongoDB ✔️ Real time DB: Firebase, Firestore & Supabase ✔️ Wrapper: Cordova, Phonegap, Capacitor ✅ Mobile App Development ✔️ Ionic, React Native, Flutter, Flutterflow & Sencha Touch: Cross-platform mobile apps with integrated AI features for engaging user experiences. ✔️ Design ➔ UI / UX Design, Adobe XD, Figma, Sketch ✅ Cloud & Serverless Solutions ✔️ Scalable Architectures: Using AWS, Azure, and Google Cloud for efficient and resilient platforms. ✔️ API Development & Integration: Connecting your application seamlessly to third-party and internal services. Sounds interesting? Let's have a quick Freelancer call/chat to discuss your project.

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Sencha / YahooUI PHP JavaScript Python Data Processing

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Payal R.

5,0

4,0

83%

North 24 Parganas, India

$15 USD por hora

I have 12 years of experience in liferay, liferay cloud stack, portal architectures and content management system. I have implemented various projects based on liferay portal, liferay theme, custom widget functionality with java and responsive user interface. I am a part-time freelancer and can work Australian or U.S. business hours. Thank you

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Sencha / YahooUI Java JavaScript Website Design J2EE

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Jitendra P.

5,0

2,9

100%

Pune, India

$18 USD por hora

Do you have a Java job and are looking for a talented and experienced Java Developer? I believe that my experience and skill in this background will prove to be of great help to you. I have worked as a Java Developer and Javascript Programmer (ExtJS 4.x) for years and my skills and experience will prove useful to your work. I have also worked as a Java/ J2ee developer with total 16.5 yrs of experience. I also possess proficiency in various areas like Spring, Hibernate etc. I am ready to start working on your job.

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Sencha / YahooUI Java JSP J2EE RESTful

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Los clientes califican nuestra Sencha / YahooUI Developers

4.4 de 5

de 1.015 opiniones

Cómo contratar a un excelente Sencha / YahooUI Developer freelance

A Sencha or YahooUI developer is a front-end JavaScript engineer who builds rich, data-driven web applications using the Sencha Ext JS framework or the Yahoo User Interface (YUI) library. These specialists create complex enterprise interfaces, dashboards, and single-page applications with reusable components, advanced grids, charts, and MVC or MVVM architectures. Hiring a skilled Sencha developer or YahooUI expert means getting clean, maintainable code that handles large datasets, intricate forms, and cross-browser compatibility without sacrificing performance.

What a Sencha or YahooUI developer delivers

Sencha Ext JS and YUI remain core technologies for enterprise applications, internal admin tools, financial dashboards, and legacy systems that depend on stable, component-based JavaScript libraries. A freelance Sencha developer translates business requirements into structured, modular front-end code that integrates cleanly with backend APIs, databases, and authentication layers.

Common deliverables from a Sencha or YahooUI freelancer include:

Custom Ext JS components, panels, grids, trees, and form widgets

Single-page applications built on Sencha Cmd with MVC or MVVM patterns

Data-bound grids handling thousands of rows with pagination, filtering, and inline editing

Charting and visualization layers using Ext JS charts or YUI Charts

Theming and styling using Sencha SASS variables and custom theme packages

Migration of legacy YUI 2 and YUI 3 applications to modern frameworks or newer Ext JS versions

REST and SOAP API integration through Ext.data.Store and proxy configurations

Cross-browser testing, accessibility fixes, and performance tuning

Unit testing with Jasmine, Siesta, or YUI Test

Tools and technologies a Sencha developer works with

A capable Sencha or YUI freelancer is fluent across the surrounding toolchain that enterprise front-end work demands. Expect proficiency with:

Sencha Ext JS (versions 4 through 7), Sencha Touch, and Sencha Cmd

Sencha Architect for visual application building

Yahoo User Interface library (YUI 2 and YUI 3) and YUI Loader

JavaScript (ES5 and ES6+), HTML5, CSS3, and SASS

AJAX, JSON, REST, and WebSocket integrations

Build tools such as Sencha Cmd, Webpack, Grunt, and Gulp

Version control with Git and CI/CD pipelines using Jenkins or GitLab CI

Testing frameworks including Jasmine, Siesta, Karma, and Selenium

Backend integration with Java, .NET, Node.js, PHP, or Python services

Industries and use cases

Sencha Ext JS and YahooUI are heavily used in environments where dense data display and rigorous business logic matter more than marketing-style visuals. Typical engagements include:

Financial services platforms, trading dashboards, and risk management tools

Enterprise resource planning (ERP) and customer relationship management (CRM) systems

Healthcare and electronic medical record interfaces

Logistics, fleet management, and supply chain dashboards

Government, defense, and public sector intranet applications

Telecom provisioning and network monitoring consoles

Legacy YUI application maintenance and migration projects

How to evaluate Sencha and YahooUI candidates

Because these frameworks power business-critical applications, vetting matters. Look for candidates with multi-year experience on Ext JS or YUI, a portfolio that includes complex grids or live dashboards, and a clear understanding of component lifecycles, data stores, and event handling.

Strong signals on a freelancer's profile include shipped enterprise SPAs, demonstrated experience migrating YUI codebases, contributions to Sencha forums or open-source plugins, and comfort with backend API design. Code samples should show clean class definitions, sensible store configurations, and disciplined separation between view, controller, and model logic.

Useful interview questions to copy and use:

Can you walk me through how you would architect an Ext JS MVVM application that loads and edits 50,000 records efficiently?

How do you handle data binding between a store and multiple views without creating memory leaks?

What approach would you take to migrate a YUI 2 application to a more modern stack while keeping business logic intact?

Which Sencha Cmd commands do you use most often, and how do you customize a production build?

How do you debug performance issues in a grid rendering thousands of rows with custom renderers?

Why hire Sencha / YahooUI developers on Freelancer.com

Sencha and YUI are specialist skills, and finding genuine experience can be difficult through general hiring channels. Freelancer.com gives you access to a global pool of vetted JavaScript developers, including engineers with deep Ext JS and YUI experience across enterprise verticals. You can review profiles, portfolios, ratings, and verified reviews before committing.

Clients set their own budgets and receive competitive bids from freelancers worldwide, so you can match scope to spend without compromising on capability. Milestone Payments protect your funds until agreed deliverables are met, and built-in chat, file sharing, and time tracking keep collaboration organized from kickoff through delivery. Whether you need a one-off bug fix or a full Ext JS rebuild, you can hire on Freelancer.com with confidence.

Ready to build or maintain your Ext JS or YUI application with proven specialists? Post a project on Freelancer.com today and connect with skilled Sencha and YahooUI developers ready to deliver.

What are the steps to hiring a freelance Sencha / YahooUI developer?

Hiring a Sencha or YahooUI developer follows a straightforward process on Freelancer.com. Because these are specialist skills, the quality of your brief and your evaluation of candidate experience determine how smoothly the engagement runs. The three steps below walk you through it.

Step 1: Post your project on Freelancer.com

Your project post is the single biggest determinant of bid quality. A clear, technically specific brief filters for developers who genuinely understand Ext JS or YUI rather than generalists who will struggle with framework conventions. Head to the post project page , fill in the brief, scope, timeline, and budget, and publish the project for freelancers to bid on.

State the framework and version (e.g., Ext JS 6.2 Classic, Ext JS 7 Modern, YUI 3.18)

List the deliverables: components to build, grids to optimize, modules to migrate, or bugs to fix

Describe backend integrations, API formats, and authentication requirements

Include browser support targets and any accessibility or compliance constraints

Attach wireframes, screenshots, or sample data if available

Set a realistic timeline and a budget range that matches scope

Step 2: Review bids from freelancers

Bids are short proposals that reveal how a freelancer interprets your brief. A strong Sencha or YUI proposal references the specific framework version, suggests an architectural approach, and raises clarifying questions about data volume, store design, or migration scope. Read each bid carefully and shortlist candidates whose technical understanding matches the work.

Look for clear references to Ext JS versions, MVC/MVVM patterns, or YUI modules

Check whether the freelancer raises sensible questions about data stores, API design, or build tooling

Assess proposed timelines for realism against the scope you described

Review attached samples of grids, dashboards, or migration case studies

Use Freelancer.com's chat to ask follow-up questions before shortlisting

Step 3: Evaluate freelancers and award the project

The final decision combines proposal quality with profile evidence. Look for consistent quality across multiple Ext JS or YUI projects rather than a single impressive sample, and weigh written reviews from past enterprise clients heavily. The portfolio should show real working applications, not just static screenshots.

Inspect portfolio depth for Ext JS or YUI work, not generic JavaScript projects

Check star ratings and the volume of completed projects

Read written client reviews for comments on code quality, communication, and on-time delivery

Confirm verified payment method, completion rate, and on-time delivery rate

Award the project and use Milestone Payments to release funds as deliverables are accepted

What is the difference between Sencha Ext JS and YahooUI?

Sencha Ext JS is a commercial, full-stack JavaScript framework focused on enterprise single-page applications with rich components and an MVC/MVVM architecture. YahooUI (YUI) is an older open-source library of UI controls and utilities; while no longer actively developed, many legacy applications still rely on it and need ongoing maintenance or migration.

Can I hire a Sencha freelancer for a one-off project?

Yes. Many clients post short engagements on Freelancer.com for specific tasks like building a custom grid, fixing a chart bug, upgrading from Ext JS 4 to 7, or migrating a YUI module. You can scope the work tightly and award a fixed-price project with milestones tied to defined deliverables.

How long does a typical Sencha Ext JS project take?

Small fixes and component customizations can be completed in days, while a full enterprise SPA build often runs several months. Migration projects from YUI or older Ext JS versions depend on codebase size and integration complexity, so a discovery phase with the freelancer is usually the best first step.

Do I need a Sencha developer or a general JavaScript developer?

If your application is built on Ext JS or YUI, hire a specialist. The component model, data stores, layout system, and build tooling are specific enough that a general JavaScript developer will lose significant time learning the framework. Specialists deliver faster and produce code that follows framework conventions.

Should I hire a freelancer or an agency for Sencha work?

For focused work, maintenance, or augmenting an existing team, a freelancer is usually the most cost-effective choice. Agencies make more sense when you need a multi-disciplinary team handling backend, design, and DevOps alongside Sencha development. Freelancer.com supports both individual hires and team-based engagements.