ReactJS Developer

Role: UI Lead

Exp: 8+ Years

CTC: up to 30 LPA

Mode of Interview: 2 rounds onsite + 2 online

Key Responsibilities: 

• Lead the UI team in designing and developing scalable, responsive, and performant user interface components. 
• Define and enforce UI coding standards, best practices, and guidelines. 
• Collaborate with UX designers to translate wireframes and prototypes into high-quality code. 
• Work closely with product managers to understand requirements and translate them into technical solutions. 
• Mentor and coach UI developers, providing guidance and support on technical challenges. 
• Conduct code reviews to ensure code quality, performance, and adherence to design principles. 
• Stay updated with the latest UI trends, technologies, and best practices. 
• Drive innovation and continuous improvement within the UI development process. 

Required Skills and Qualifications: 

• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent work experience). 
• Proven experience (>8 years) as a UI developer with expertise in HTML5, CSS3, JavaScript/TypeScript 
• Proven experience in front-end frameworks React (must), Angular(good to have), Vue.js(good to have). 
• Solid understanding of responsive web design, accessibility, and cross-browser compatibility. 
• Experience leading a team of UI developers in an agile environment. 
• Strong problem-solving skills and ability to troubleshoot complex issues. 
• Excellent communication skills with the ability to collaborate effectively with cross-functional teams. 

Role: React UI Lead

Exp: 8+ Years

CTC: up to 30 LPA

Mode of Interview: 2 rounds onsite + 2 online

Required Skills and Qualifications: 

• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent work experience). 
• Proven experience (>8 years) as a UI developer with expertise in HTML5, CSS3, JavaScript/TypeScript 
• Proven experience in front-end frameworks React (must), Angular(good to have), Vue.js(good to have). 
• Solid understanding of responsive web design, accessibility, and cross-browser compatibility. 
• Experience leading a team of UI developers in an agile environment. 
• Strong problem-solving skills and ability to troubleshoot complex issues. 
• Excellent communication skills with the ability to collaborate effectively with cross-functional teams. 
• Experience with version control systems (e.g., Git) and CI/CD pipelines. 
• Experience with UI testing frameworks and tools (e.g., Jest, Cypress) is a plus. 
• Knowledge of UX design principles and familiarity with UX design tools (e.g., Sketch, Adobe XD) is desirable. 
• Ability to prioritize and manage multiple tasks in a fast-paced environment. 
• Experience building a UI for multi-tenant SaaS platform. 

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)

Responsibilities:

• Design, develop, and maintain web applications using Java and React JS.

• Collaborate with cross-functional teams to define, design, and ship new features.

• Ensure the performance, quality, and responsiveness of applications.

• Identify and correct bottlenecks and fix bugs.

• Maintain code integrity and organization.

• Develop new user-facing features using React JS.

• Build reusable components and front-end libraries for future use.

• Translate designs and wireframes into high-quality code.

• Optimize components for maximum performance across a vast array of web-capable devices and browsers.

• Participate in team meetings and discussions to understand user needs and functionalities.

• Perform code reviews and improve and maintain code quality.

• Work closely with product management and back-end developers to integrate user-facing elements with server-side logic.

• Keep up-to-date with the latest industry trends and technologies to ensure applications are current and competitive.

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, or a related field.

• Proven experience as a Full Stack Developer or similar role.

• Strong proficiency in Java and React JS.

• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.

• Experience with React JS workflows such as Redux, Flux, and Webpack.

• Familiarity with RESTful APIs and web services.

• Knowledge of performance testing frameworks including Mocha and Jest.

• Excellent troubleshooting skills.

• Good project management skills.

• Strong communication and teamwork abilities.

Preferred Qualifications:

• Experience with cloud services such as AWS or Azure.

• Familiarity with CI/CD pipelines and DevOps practices.

• Knowledge of database management systems like MySQL, PostgreSQL, or MongoDB.

About koolio.ai

Website: www.koolio.ai

koolio Inc. is a cutting-edge Silicon Valley startup dedicated to transforming how stories are told through audio. Our mission is to democratize audio content creation by empowering individuals and businesses to effortlessly produce high-quality, professional-grade content. Leveraging AI and intuitive web-based tools, koolio.ai enables creators to craft, edit, and distribute audio content—from storytelling to educational materials, brand marketing, and beyond—easily. We are passionate about helping people and organizations share their voices, fostering creativity, collaboration, and engaging storytelling for a wide range of use cases.

About the Full-Time Position

We are looking for a Junior Frontend Engineer to join our fast-growing team on a full-time, hybrid basis. You will be a key contributor in enhancing the user interface of koolio.ai’s AI-powered platform, driving innovation and excellence in audio content creation. You will collaborate closely with senior developers and designers to deliver high-performance, user-friendly web applications that delight our customers.

Key Responsibilities:

• Collaborate with the product and design teams to develop and implement user-friendly web interfaces
• Write clean, efficient, and reusable code using modern frontend technologies
• Ensure responsive design and optimize web pages for performance and scalability across devices
• Debug and resolve issues, improving the overall user experience on the platform
• Assist in integrating APIs and frontend services with the backend
• Stay up-to-date with the latest trends in frontend development and suggest improvements to enhance the platform’s functionality

Requirements and Skills:

• Education: Degree in Computer Science or a related field
• Work Experience: Minimum of 1-2 years of proven experience as a Front-end Engineer or similar role with a focus on user interface development
• Technical Skills:
• Strong proficiency in JavaScript frameworks like ReactJS or Redux
• Proficiency in frontend languages such as HTML, CSS, and JavaScript (ES6+)
• Experience with CSS frameworks (e.g., Bootstrap or Tailwind CSS) for responsive design
• Basic understanding of REST APIs and integration with frontend applications
• Knowledge of version control systems (e.g., Git) and best practices in code management
• Soft Skills:
• Strong attention to detail and a focus on delivering high-quality work
• Ability to work effectively in a remote, collaborative environment with distributed teams
• Willingness to learn new technologies and adapt to a fast-paced startup environment
• Excellent communication and time-management skills, with the ability to manage multiple tasks simultaneously
• Other Skills: 
• Familiarity with Figma or other design tools is a plus. 
• Understanding of SEO principles and how frontend development impacts web performance

Compensation and Benefits:

• Total Yearly Compensation: ₹8-12 LPA based on skills and experience
• Health Insurance: Comprehensive health coverage provided by the company
• ESOPs: An opportunity for wealth creation and to grow alongside a fantastic team

Why Join Us?

• Be a part of a passionate and visionary team at the forefront of audio content creation
• Work on an exciting, evolving product that is reshaping the way audio content is created and consumed
• Thrive in a fast-moving, self-learning startup environment that values innovation, adaptability, and continuous improvement
• Enjoy the flexibility of a full-time hybrid position with opportunities to grow professionally and expand your skills
• Collaborate with talented professionals from around the world, contributing to a product that has a real-world impact

We are looking for a Frontend Developer who would be working on the bleeding edge of technologies. We work primarily with React, Typescript and Redux.

Responsibilities:

• Understand why a particular design was chosen and code accordingly.
• Will have to deliver clean bug-free unit-tested code with minimal guidance.
• Strive for continuous improvement by refactoring and applying best practices.
• Learn and adapt to new technologies as necessary.

Requirements:

• Must be proficient in React, Redux, Redux Toolkit and Typescript.
• Used Typescript for React Components.
• Unit Testing, Component Testing, and Custom React hook tests with React Testing Library.
• Integration Tests with Cypress.
• Data Fetching libraries like Axios, React Query, RTK Query etc.
• Should have maintained React Components with Storybook.
• Experience contributing to open-source software will be preferred.
• Used various CSS stylings methods like CSS Modules, LESS, SCSS, Tailwind, Styled Components, Emotion etc.
• Should understand Git.
• Ability to work in a fast-paced and dynamic work environment.
• Exceptional interpersonal skills and demonstrated leadership abilities.

Frontend Engineer - Angular Developer

The Impact you will create in the Job:

Design and build beautiful UI’s using the Angular framework

As an individual contributor, you will tackle some of our broadest technical challenges that requires deep technical knowledge, hands-on software development and seamless collaboration with all functions.

You will envision and develop features that are highly reliable and fault tolerant to deliver a superior customer experience.

You will get an opportunity to work with some of the best talent while learning from various highly-functional teams in the company.

Explore and design dynamic and compelling consumer experiences.

Work closely with the front-end team to implement versatile front-end solutions while embracing emerging technologies and pushing the limits of what a browser can do.

Suggest and implement improvements to existing product interfaces.

Ensure that all the assigned systems are performing to scale.

Command an impressive portfolio of the latest UI technologies

You will also collaborate with cross-functional teams to meet deliverables throughout the software development lifecycle and continuously identify areas of improvement.

What we look for?

Bachelor’s/Master’s degree in Computer Science/IT.

3-7 years of experience in designing and implementing high-performance web applications.

Proven expertise in front-end development and Angular.

Strong Knowledge in Angular 6/8 (Latest Version preferred).

Solid understanding of HTML/HTML5, CSS/CSS3, JQuery/JavaScript.

Proficiency working with REST API and JSON API.

Experience working on Reactive based forms.

Knowledge of NgRx.

Must be a self-starter and keen to explore new solutions.

Excellent team working and collaboration skills.

Solution oriented approach.

Good Hands-on in Linux OS, Git versioning.

Comfortable with tackling ambiguous problems and unblocking yourself.

Responsibilities:

• Planning, estimation, requirement analysis, database designing, wireframing, layout design of the assigned project and other ongoing projects in a team with Project Manager / Developer / Designer.
• Handling coding works or major/complex parts of assigned projects and providing coding help and supervision to team members.
• Maintaining and auditing code/design quality as per set guidelines and standards in assigned projects.
• Testing of completed tasks in ongoing projects in the team before sending updates to reporting authority/client.
• Remove the technical impediments
• Focusing the team to ensure the on-time delivery of the agreed task.
• Reporting progress to the Project Manager.
• Facilitating code/design reuse.
• Training and mentoring of team members.
• Maintaining the skill set matrix of the team.
• Building and maintaining PWA.
• Work closely with the product team to accelerate A/B testing and maximize engagement.

Requirements:

• Excellent knowledge of HTML5, CSS3.
• Excellent knowledge of JavaScript, Jquery.
• Excellent knowledge of JavaScript MVC architecture and OOP programming style.
• Good understanding and experience of working on Vue.js/React.js.

Experience - 2.0 - 6.0 Year(s)

Location : Bangalore/Gurgaon

Qualification : Any Graduation

Candidate should either be from Tier 1 college/working in a Tier 1 product based company

Looking for Candidates having 2 to 6 Year(s) of experience in Frontend Development and atleast 1.5 to 2 years of experience in React.js

Individual contributor role

Reporting to Tech Lead Directly