Frontend developer (Next.js)

About CK-12 Foundation:

CK-12 is on the lookout for talented, creative, and dedicated people to join our mission to provide great education to students around the world. We are looking for candidates to join our Bangalore office.

We have a strong education platform that has served 265+ million users, answered 2.33+ billion questions, and created 290,000+ customized FlexBooks. We are on an exciting journey to build an AI-powered Student Tutor and Teacher Assistant, shaping the next generation of learning platforms.

CK-12’s mission is to provide free access to open-source content and technology tools that empower students and teachers to experiment with different learning styles, resources, and levels of competence.

To achieve this ambitious vision, we are challenging the traditional education model and transforming it through technology. CK-12 is a non-profit organization, enabling us to experiment with bold ideas and truly focus on doing what’s right. We are backed by Vinod Khosla, a renowned technology venture capitalist.

At CK-12, you’ll work in a dynamic, entrepreneurial, innovative, and non-bureaucratic environment, alongside a small group of passionate individuals determined to disrupt education as we know it.

Technology is key to scaling education, and we deeply believe in it. Join us to build impactful solutions on our cloud-based (AWS), AI-first platform, delivering rich and interactive learning experiences.

If our mission, people, and technologies excite you—and you’re someone who challenges the status quo (no order-takers!)—we’d love to hear from you.

Products:

Flexi 2.0 – AI-powered Student Tutor

https://www.flexi.org/

AI-powered Teacher Assistant

https://www.ck12.org/pages/teacher-assistant/

Location

Bangalore (Office-based)

Basic Qualifications:

• Passion for creating simple, intuitive, and delightful web / mobile user experiences
• Strong understanding of computer science fundamentals, algorithms, and data structures
• Excellent problem-solving skills
• Ability to research and evaluate web and mobile frameworks and UI patterns
• Experience designing for multiple screen sizes, performance constraints, and varying network conditions
• Comfortable working in Agile environments with rapid iterations
• Ability to create and review high-level and detailed designs
• Strong focus on code quality, best practices, and maintainable code with solid unit test coverage

Required Skills & Experience:

• Bachelor’s or Master’s degree in Computer Science or equivalent
• 6+ years of overall experience
• Strong hands-on experience with either React.js (or a similar frontend framework) or mobile app frameworks such as Flutter or React Native.
• Strong inclination toward product ownership, with a focus on nurturing features based on how users actually use the product.
• Experience building and maintaining production-grade web or mobile applications
• Expert knowledge of object-oriented programming, design, and development
• Solid understanding of mobile application architecture, performance, and memory management
• Proficiency in Dart / JavaScript / TypeScript
• Experience consuming REST APIs and handling JSON
• Experience with responsive layouts and adaptive UI design
• Familiarity with UI patterns related to security, performance, and usability
• Experience using Git and mobile build/release pipelines

Good to Have:

• Experience with native mobile development (Android / iOS)
• Familiarity with CI/CD for mobile apps and app store deployments
• Experience working in distributed and Agile teams
• Performance optimization for scalable mobile applications
• Familiarity with LLMs (Large Language Models)
• Experience creating or maintaining mobile UI documentation or component libraries

We are seeking a passionate and skilled React Engineer with over 1 year of experience to join our team. The ideal candidate will have hands-on experience building dynamic and responsive web applications using React.js. This role requires a strong understanding of front-end development principles and the ability to deliver high-quality, scalable solutions in a collaborative environment.

Key Responsibilities:

• Develop, maintain, and optimize web applications using React.js.
• Create reusable and modular components to ensure consistency and efficiency in development.
• Collaborate with designers and backend developers to implement user-friendly features.
• Debug and troubleshoot application issues to enhance performance and user experience.
• Integrate APIs and manage state effectively using tools like Redux, Context API, or React Query.
• Ensure responsive design and cross-browser compatibility for seamless user experiences.
• Write clean, well-documented, and maintainable code.
• Stay up-to-date with the latest React and front-end development trends.

Core Proficiency:

• Strong understanding of JavaScript (ES6+).
• Proficiency in React.js and its core principles, including JSX, hooks, and lifecycle methods.
• Experience with state management libraries like Redux, Context API, or React Query.
• Proficiency in styling in the component.
• Familiarity with Tailwind CSS for efficient UI development and responsive design.
• Experience with CSS-in-JS libraries like Styled-Components or Emotion is a plus.
• Familiarity with Next.js for server-side rendering (SSR), static site generation (SSG), and routing capabilities.
• Hands-on experience integrating RESTful APIs or GraphQL into React applications.
• Proficient in Git for version control and collaborative development.
• Basic understanding of testing frameworks like Jest, React Testing Library, or Cypress.
• Understanding of code splitting, lazy loading, and performance optimization techniques.

● Design and develop responsive and visually appealing web applications and user interfaces using HTML, CSS, and JavaScript, React frameworks.

● Collaborate with UX designers, product managers, and software engineers to understand project requirements and translate them into interactive, user-friendly interfaces.

● Ensure the technical feasibility of UI/UX designs and optimise applications for maximum speed and scalability.

● Conduct code reviews and provide constructive feedback to team members, fostering a culture of continuous improvement.

● Stay updated with the latest industry trends, best practices, and emerging technologies in UI development, and recommend their integration to enhance our products.

● Identify and address performance and compatibility issues across different browsers and platforms.

● Champion UI development best practices, standards, and guidelines within the development team.

● Collaborate with backend developers to integrate front-end interfaces with server-side logic and APIs.

● Troubleshoot and debug UI-related issues and provide timely resolutions.

● Mentor junior developers, assisting them in enhancing their skills and knowledge in UI development.

● Write and encourage other engineers to write automated tests.

Skills/ Experience

● Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent practical experience).

● Proven experience as a UI Developer or Front-End Developer, with at least 3+ years of hands-on experience in building user interfaces for web applications.

● Proficiency in front-end technologies such as TypeScript, Tailwind, React, Redux.

● Strong understanding of responsive design principles.

● Solid knowledge of web performance optimization techniques and best practices.

● Familiarity with Figma and other UI/UX design tools, to collaborate effectively with designers.

● Demonstrated experience in writing UI components to corresponding backend APIs and Databases.

● Excellent problem-solving skills and ability to troubleshoot complex UI-related issues.

● Strong communication and collaboration skills, with the ability to work effectively in a team-oriented environment.

Job Description:

• Meeting with the development team to discuss user interface ideas and applications.
• Reviewing application requirements and interface designs.
• Identifying web-based user interactions.
• Developing and implementing highly responsive user interface components using React concepts.
• Writing application interface codes using JavaScript following React.js workflows.
• Understanding of React.js and its core principles.
• Familiar with newer specifications of ES6 and RESTful APIs.
• Debugging browser-based and performance testing software.
• Troubleshooting interface software and debugging application codes.
• Developing and implementing front-end architecture to support user interface concepts.
• Monitoring and improving front-end performance.
• Documenting application changes and developing updates.

Reporting Structure:

• This position reports to the Team Leader - Technology.

Job Specifications:

• Bachelor’s Degree in Computer Science, Information Technology, or a similar field.
• 3+ years of working with complex front-end development in HTML/CSS/JavaScript/Sass/Less, AJAX and JSON.
• 3+ years of working with React.js is a must.
• Knowledge of React tools including React.js, Webpack, Enzyme, Redux, Context API, and Flux performance testing frameworks including Mocha and Jest.
• Excellent communication and interpersonal skills.
• Strong problem solving, analytical, decision making and technical ability.

• Firm grasp of the JavaScript / Typescript language and its nuances,
• including ES6+ syntax
• Knowledge of Object oriented programming
• Ability to write well-documented, clean Javascript code
• Rock solid at working with third-party dependencies and debugging dependency conflicts
• Understanding of REST APIs, the document request model, and offline storage

Desired Candidate Profile

Role Description:

We are looking for a Lead Frontend Engineer (  Preferably React Js) who will be architecting and developing cutting-edge features for Radiusagent web applications . An ideal candidate will have prior experience in eCommerce Products and worked closely with Product, Design, and other cross-functional partners. 

Responsible for- 

• You will be constantly and consistently implementing new features and optimize existing ones from controller-level to UI- Vigilantly and rapidly fix bugs.
• You will continuously solve problems to give our customers a delightful experience.
• You will be working closely with Product manager and back-end engineers to implement front-end solutions. 
• You will be endorsing upcoming standards, launching, iterating, and making a difference.
• You will have to be extremely detail-oriented to strive for pixel-perfect implementation in all browsers.
• You should have the ability to write well-abstracted, reusable, highly performant code for UI components.
• You should have the passion for performance debugging and benchmarking.

Requirement-

• 5+ years of experience in building scalable commercial web applications.
• A passion to provide a good user experience
• Deep expertise in Javascript and work experience in using one of the frameworks available (React JS, Angular, Node JS, EmberJS, etc).
• If you are passionate about implementing elegant User Interfaces using HTML and CSS.
• Ability to work autonomously and to be able to work cross-functionally with multiple stakeholders.
• Excellent communication skills, good visual design sense, in-depth experience in developing web-based applications.

Frontend Developer - React JS/progressive Web App (2+ yrs experience)

Experienced in developing applications using Javascript, ReactJS, AngularJS, NodeJS, HTML5, CSS3/CSS4 and other UI technologies.
Experience in building rich PWA applications.
Understanding and experience with asynchronous processing, partial page refresh, DOM traversal and manipulation 
Deliver across the entire app life cycle - concept, design, built, deploy, test
In depth data structure and algorithm developement experience