UI Developer

Job Title : Frontend Developer (React + Three.js)

Location : Noida

Experience : 2+ Years

Job Description :

We are looking for a Frontend Developer with strong skills in React.js and Three.js to build interactive, high-performance 3D web applications. The role involves creating smooth 3D experiences, optimizing performance, and collaborating with cross-functional teams.

Key Responsibilities :

• Develop responsive and dynamic UIs with React.js/Next.js.
• Implement and optimize 3D visualizations using Three.js/WebGL.
• Manage 3D assets (GLTF/GLB, textures, compression).
• Ensure performance optimization, cross-browser compatibility, and scalability.
• Collaborate with designers and backend teams to deliver seamless experiences.

Required Skills :

• JavaScript/TypeScript, React.js/Next.js
• Three.js / WebGL for 3D rendering & interactions
• State management (Redux, Zustand, Context API)
• 3D asset pipeline (GLTF/GLB, textures, compression tools)
• Performance optimization (profiling, draw calls, FPS tuning)
• API integration (REST/GraphQL)
• Version control (Git)

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.

Experience: 2 to 4 years

CTC Offered: Upto 15lpa

Job Description:

1. In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
2. Knowledge of REACT tools React Components designing, React-Bootstrap.
3. Experience with user interface design.
4. Experience with responsive and adaptive design.
5. Understanding of SEO principles.
6. Experience with browser-based debugging and performance testing software.
7. Excellent troubleshooting skills.
8. Good project management skills.

Interview Process:

1. Personal interview with Sr. Manager (Technical Round)
2. Personal Interview with HOD (Technical + Behavioural)

Technical Skills Required:

• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, React/Angular )
• Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• An analytical mind

Requirements:

• Developing and implementing user interface components using React.js concepts and workflows.
• Developing user interface components and implementing them with a well-known React.js workflow.
• Building reusable components and front-end libraries for future use.
• Translating designs and wireframes into high-quality code
• In-depth knowledge of JavaScript and React concepts, excellent front-end coding skills, and a good understanding of progressive web applications.
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers.
• Develop a flexible and well-structured front-end architecture, along with the APIs to support the applications 

• Creating and maintaining digital assets, such as interface design files, wireframes, and interactive mockups using design and prototyping tools: e.g., Sketch and InVision
• Designing, building and maintaining highly reusable JavaScript, HTML and CSS code
• Understanding the limitations of our tech stack and business model and providing technical advice wherever necessary
• Coordinating the workflow between the UI/UX designs, HTML, CSS and backend application logic
• Cooperating with the back-end developer in the process of building the RESTful API

Desired Candidate Profile

• Confidence in working with HTML5/CSS3, JQuery, Ajax, Bootstrap, responsive design
• Expert knowledge of HTML5 and its best practices
• Proficiency in designing interfaces and building clickable prototypes using Sketch, InVision, Axure, etc.
• Knowledge of Git version control
• Knowledge of the command line
• 2+ years experience as a front-end developer
• 1+ year experience as a UI/UX designer    

Skills Required:

• Deep understanding of React.js and its fundamentals, ideally including modern features like hooks
• Excellent understanding of TypeScript/Javascript including the OOP concept and how shadow DOM and DOM work
• Experience with widely used React.js state managers like Flux/Redux
• Knowledge of RESTful APIs
• Familiarity with modern front-end build pipelines and tools like Webpack, Babel, NPM etc
• Knowledge of the overall browser rendering behaviour and measuring and optimising performance
• Strong hands-on experience with source code management systems like Git

Learn from the best: Learn from leaders who have built Comm100 from ground up. Work under other engineers who handle different layers of the infrastructure.

Work in a data-driven team: Understand the importance of validating assumptions about user behaviour. Use various types of testing to ensure we're right (or discover where did we go wrong). Utilize data collection, enrichment, analytics, and visualizations to improve our systems.

WHO YOU ARE

To be successful in this role, you'll need to have the following skills:

Love for coding: A fanatic about writing beautiful and scalable code.

Sense of analytics: Strong analytical and troubleshooting skills. Should be resourceful, innovative, and inventive.

Dynamic: Should be comfortable in dealing with lots of moving pieces. Have exquisite attention to detail and are comfortable learning new technologies and systems.

Team player: Knack for influencing without being authoritative. Pitch in wherever the team needs help, from writing blog posts to supporting customers.

Accountability: High sense of ownership for your code and relentlessness to deliver projects with high business impact.

KEY SKILLS

• Strong computer system analysis and design skills in current methodologies and patterns including vanilla JavaScript,
• Rich experience with ReactJS, Redux, React Native, or similar library/tools.
• Obsessed with WPO (Web Performance Optimization) and web/mobile performance analysis.
• Familiar with web security, SEO, accessibility, and internationalization.
• Experience with W3C standards, HTTP protocol and web browsers.
• Experience with common tools such as front-end compilation, construction, testing, etc. (Babel, Rollup, Webpack, Jasmine, etc.)