UI Developer

We are seeking a highly motivated Software Development Engineer with expertise in building scalable, extensible and user-friendly web applications. You will work with a fast paced Product Engineering team to build efficient and reusable web applications for mobile and fixed devices. 

What you’ll do:

• Architect, Design, Code reviews and build scalable applications.
• You will be engaged in identifying and addressing performance bottlenecks, and collaborate with other team members to innovate current/new products. 
• Identify, communicate and implement best practices for application engineering. 
• Ensure high scalability and performance

• You will advocate for good, clean, well-documented and performing code; define and follow standards and best practices for front-end development.

We’d love for you to have:

• Experience: 1-3 yrs recent experience of working in a scalable web product firm
• Education: B.Tech/M.Tech  in Computer Science from Top ranked colleges in India
• Excellent software development skills in developing web applications over client-side frameworks - Backbone, React (preferred) and/or angular frameworks (preferred); and server-side frameworks like node.js
• Excellent programming skills in object-oriented, modularised JavaScript, Typescript (preferred)
• Strong knowledge and working experience in server-side Event-driven programming using Node.js
• Excellent programming skills in Javascript,  jQuery, AJAX, YUI.
• Passion for writing optimized code using JS best practices  and design patterns
• Experience with JS or Java-based Unit/Integration Testing using Selenium, Appium, Selendroid
• Hands-on experience in building scalable web applications
• Excellent problem solving and debugging skills
• Good Knowledge of version control - GIT (preferred)
• Experience with the full software development lifecycle, design, develop, debug, document, and deliver (especially in a multiple site organization)
• Strong verbal and written communication skills
• Ability to deliver great results in an agile development
• Good to have: Working knowledge of web standards (i.e., REST) and OOPS
• Good to have: Experience in Data Structures, Algorithms and their optimization

Even if you don’t meet all of these qualifications above, we’d still love to hear from you. Tell us about your unique qualifications in your cover letter.

CaaStle is committed to equality of opportunity in employment. It has been and will continue to be the policy of CaaStle to provide full and equal employment opportunities to all employees and candidates for employment without regard to race, color, religion, national or ethnic origin, veteran status, age, sexual orientation, gender identity, or physical or mental disability. This policy applies to all terms, conditions and privileges of employment, such as those pertaining to training, transfer, promotion, compensation and recreational programs.

About the Role

We are looking for a Front-End JavaScript Developer who has a strong grasp of core JavaScript and fundamental computer science principles. This role is ideal for someone who enjoys solving complex problems, can quickly adapt to new technologies, and is comfortable reading and implementing solutions from technical documentation.

As part of our team, you will develop high-quality, efficient, and scalable front-end solutions while working closely with designers and back-end engineers. A deep understanding of JavaScript (not just frameworks) is key for this role.

Responsibilities

• Develop and maintain front-end applications using vanilla JavaScript and modern ES6+ features.
• Work with HTML, CSS, and JavaScript to build interactive, responsive, and high-performance user interfaces.
• Read and interpret technical documentation to integrate APIs, optimize performance, and implement new functionalities.
• Debug and troubleshoot front-end issues efficiently.
• Collaborate with back-end developers and designers to ensure seamless integration of UI/UX.
• Write clean, maintainable, and well-documented code following best practices.
• Stay up-to-date with advancements in web development and emerging technologies

Requirements

• Strong understanding of JavaScript (ES6+), closures, event loops, async/await, fetch api and functional programming concepts.
• Solid grasp of computer science fundamentals, including data structures, algorithms, and object-oriented programming (OOP).
• Experience with HTML5, CSS3, and modern styling techniques (e.g., Flexbox, Grid, SASS, Tailwind).
• Ability to read and implement features based on technical documentation and specifications.
• Proficiency in working with RESTful APIs and handling JSON data.
• Familiarity with DOM manipulation, performance optimization, and browser debugging tools.
• Experience with Git/GitHub and version control workflows.
• Strong problem-solving skills and ability to learn quickly in a fast-paced environment.

Nice to Have (Bonus Skills)

• Experience with WebAssembly (WASM), WebSockets, or Service Workers.
• Familiarity with TypeScript.
• Understanding of compilers, interpreters, and low-level programming concepts.
• Experience with build tools like Webpack, Rollup, or Vite.
• Knowledge of testing frameworks like Jest or Mocha.
• Exposure to performance profiling and memory management in JavaScript.

Why Join Us?

• Work on challenging and impactful projects that require deep problem-solving.
• Opportunity to learn and grow in a fast-paced, tech-driven environment.
• A team that values engineering excellence, core computer science, and continuous learning.
• Competitive salary, benefits, and a culture that fosters innovation.

If you re passionate about JavaScript and love solving technical challenges, we’d love to hear from you!

• You have 4-8 years of experience  in Frontend for web based applications with strong understanding of HTML, CSS, JavaScript, Frameworks like Angular  or React
• You love building things, and have built complex consumer web applications in the past.
• You have a sound understanding of data structures and algorithms.
• You are an expert in HTML, CSS, JavaScript and jQuery.
• You are an expert in at least one JavaScript framework, such as Angular 7+, React or Vue.
• You understand how website-backend interacts with frontend as well as external APIs.
• You enjoy mentoring others and helping them solve challenging problems.

About UZIO Inc.

UZIO (HQ: Virginia, USA) http://www.uzio.com/">http://www.uzio.com With over 150+ partners, 1700+ employers, and 50,000+ employees relying on UZIO and 70+ health insurance carriers serving plans, UZIO provides an Integrated Benefits Administration and HCM SaaS technology platform for brokers, employers, and employees of SMBs in the United States.

Job Description

Requirements

• Must be having B. Tech. degree from Premium Institute with 4-6 years of proven experience in the relevant area.
• Proficiency in HTML5, JavaScript, and CSS, CSS preprocessors like Sass, LESS
• Hands-on experience in JavaScript frameworks. Preferably React Native / AngularJS
• Understanding of JS-based build tools like Grunt, Gulp, and Bower
• Up-to-date with the latest UI trends, techniques, and technologies
• Maintain and improve product platform, Build reusable code and libraries for future use
• Knowledge of browser compatibility issues
• Optimize application for maximum speed and scalability
• Design with mobile-first principles
• Integrate with REST apis
• Collaborate with other team members and stakeholders
• Develop technical and business requirements and always intuitive and user-centered solutions strive to deliver
• Experience working in an Agile/Scrum development process

 Responsibilities

• Collaborating with product management and engineering to define and implement innovative solutions for the product direction, visuals, and experience
• Conceptualizing original ideas that bring simplicity and user friendliness to complex design roadblocks
• Establish and promote design guidelines, best practices, and standards