Senior Software Engineer - Frontend

🚀 Hiring: React.js

⭐ Experience: 2+ Years

📍 Location: Mumbai

⭐ Work Mode:- 5 Days Work From Office

⏱️ Notice Period: Immediate Joiners or 15 Days

(Only immediate joiners & candidates serving notice period)

We’re looking for a skilled React.js Developer to join our growing team! If you love building dynamic, user-friendly web applications and have strong expertise in React.js, JavaScript (ES6+), and modern front-end tools, this role is for you.

✅ Key Skills:

• Proficiency in React.js, JavaScript (ES6+), HTML5, CSS3
• Experience with Redux / Context API
• Strong knowledge of REST APIs & JSON
• Familiarity with Git & Agile development
• Bonus: TypeScript, Next.js, Testing (Jest/Enzyme), UI frameworks (Material-UI/Tailwind)

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 office in Bangalore.

We have a strong education platform that has served over 265+ million users, has got over 2.33+ billion questions answered, and more than 290,000 customized Flexbooks. We have embarked on an exciting journey to build an AI-powered student tutor and Teacher Assistant to build the next generation of learning platforms.

About CK-12 Foundation:

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

To achieve this noble and ambitious vision, we at CK-12 are challenging the traditional model of education to transform it dramatically. Technology has opened up lots of opportunities to revolutionize education for the benefit of students, teachers, and parents.

We have chosen to be non-profit so that we can effectively realize our mission and do the right thing! It also provides us with the ability to experiment with big and bold ideas. CK-12 is backed by Vinod Khosla, a renowned technology venture capitalist.

At CK-12, you’ll experience the benefits of working in a dynamic, entrepreneurial, innovative, and non-bureaucratic environment where you will get a lot of cool things done you never imagined! We are a small group of passionate folks who are determined to disrupt the current form of education.

Technology is key to scale education and we deeply believe in it. Come develop great solutions on our cloud-based (AWS) and AI-first platform delivering rich and interactive content.

Does our mission, people and technologies excite you? If the answer is YES! and you are a great technologist who will challenge status-quo (no order takers please!) by innovating, please come join us! Together, we will change the world!

Check out our latest product offering: Introducing Flexi 2.0

• Flexi, our AI-powered Student Tutor – https://www.flexi.org/
• AI-powered Teacher Assistant – https://www.ck12.org/pages/teacher-assistant/

Location: Bangalore Office

Position: Frontend UI Developer (React)

Basic:

• Passion for creating great user experiences that are simple and intuitive
• Good understanding of CS fundamental algorithms and Data Structures
• Great problem solver
• Understands and researches different front-end frameworks and patterns to implement great user interfaces
• Implements solutions keeping in mind the user experience, multi-devices, performance across devices, and bandwidths
• Ability to work in an Agile environment with rapid iterations
• Creates and reviews high-level designs
• Creates detailed designs from high-level designs and reviews designs of other team members
• A Code Craftsman who follows the best software development and coding practices delivering understandable and maintainable code with thorough unit test coverage

Required:

• Bachelor’s or Master’s degree in Computer Science or equivalent
• At least 2 years of experience
• Hands-on with frameworks like React, Redux, Backbone, Webpack, Lerna
• Expert knowledge of OOP (Object Oriented Programming), design, and development
• In-depth knowledge of browser internals and architecture
• Expert in JS (OOJS), HTML5, CSS3, JSON, REST, XML, W3C standards
• Experience with responsive web design & frameworks media queries
• Experience with UI patterns (security, performance, usability)
• Familiar with version control systems (Git/Subversion) & build tools like Grunt

Desired:

• Experience with ES6, Node.js
• Worked in distributed/agile environments
• Performance optimization for scalable web apps
• Familiarity with LLMs (Large Language Models)
• Familiarity with Storybook (React) or similar frameworks

Responsibilities

• Build applications using JavaScript frameworks such as React.js, Vue.js or svelte.js

• Build reusable UI components, ensuring that UI code base is scalable and maintainable

• Ensure the technical feasibility of UI/UX designs

• Optimize application for maximum speed and scalability

• Good in writing unit test cases, and can follow test driven development approach

• Participate in user experience design and architecture initiatives

• Collaborate with other team members and stakeholders to ensure smooth delivery and elicit new

requirements

• Perform troubleshooting steps, if any, in the phase of implementation, customization, and

configuration

• Having good debugging skills and proficiency in tool to build next-generation web apps

Mandatory Skills

• Knowledge of Functional and OO JavaScript/ES6

• Built web Applications using HTML5, CSS3, and JavaScript with Frameworks like React.js(Hooks

and context API), Vue.Js and svelte.js

• Basic understanding of Typescript and type language concepts

• Clear fundamental understanding of server-side rendered apps, experience with frameworks like

Next,js or Nuxt.js is the Best

• Good understanding of lib and frameworks like Webpack (4.0), lodash, any charting lib like d3.js or

Victory

• Expertise in using JavaScript state Management libraries such as Redux or Mobx

• Prior experience in building responsive design layouts using a formal framework like Material UI.

• Familiarity with best practices (web security concepts, ensuring browser & device compatibility,

etc.)

• Experience in development and debugging tools for cross-browser issues

• Working knowledge of integrating with RESTful APIs for server-side functionality

• Ability to work well individually and in a group setting, under pressure and deadlines

Requirements

• B.Tech/ B.S. or M.Tech/ M.S. in Computer Science, IT or related field.

• 5-8 years of experience.

Desirable Skills

• Hands-on experience with using Git (handling branching and merging), any DevOps pipeline,

• Experience with Agile methodologies

• You have a strong appreciation for design and interaction, as well as an intimate understanding and appreciation for presentation layer code.
• You love puzzles, problem-solving and have proven in-depth knowledge in a variety of tech stacks.
• You are passionate about being precise in the implementation of designs and do not compromise on quality.
• You are comfortable working in a high-pressure environment and are able to adapt to the needs of the day.
• You are open-minded and curious to learn

Expectations and Responsibilities

• See a project through from conception to finished product
• Strong organizational skills. You should not need someone to “manage” you
• Excellent verbal communication skills
• Good problem-solving skills
• Attention to detail
• Be able to push the boundaries of technology to deliver an unparalleled product
• Able to research and use cutting edge tools to deliver seamless experiences for users

We expect you to have some exposure to the following technologies

• HTML5, CSS, SASS, JS
• CSS Libraries - Boostrap, CSS Grid
• Front-end frameworks (React/Angular/Vue)
• Git

Sportz Interactive (SI) works with its clients and partners to revolutionize the sports fan experience across consumption points by creating best-in-class, kickass products. SI was founded in 2002 as a B2B sports content business. Through the years, it gained immense reputation for its state-of-the-art hosted solutions, digital simulators, match centers and fantasy games. Sportz Interactive has a fantastic reputation in the online sports community, having worked with clients across the globe including the likes of The International Cricket Council, STAR Sports, Yahoo!, AOL, Eurosport, Castrol, Web 18, NDTV, Nimbus, Times of India, Rediff.com and Singtel amongst others. 

Sportz Interactive provides in-depth sports information and content and specializes in product development for the web, mobile and other interactive platforms. 
http://www.sportzinteractive.net/">www.sportzinteractive.net 

2+ years of experience on web technologies.

Primary Responsibilities:

• Coding and debugging pure JavaScript, polyglot and multi-lingual applications
• Working closely with Technical Lead/Project Manager to ensure development timelines are met
• Contribute with ideas to improve system design or streamline product delivery
• Working with challenging applications involving Real Time Data
• Working on different platforms including the usage of the Native SDKs provided on JavaScript

Required Skills:

Mandatory: Passionate about sports, Problem solving, Team player, Target & Result oriented.

Functional: HTML5, CSS3, JavaScript, Vue.js, Typescript, Stimulus JS, AJAX, Browser performance & optimization, Asynchronous requests handling and partial page updates, Browser Developer Tools, GIT and JIRA.

•  Lead the design and implementation of our new web-based user interface for our partner management service
  •    Work effectively with product management, UX designers and backend engineers
  •    Commit to deliver high quality, robust, and accessible user interface
  •    Follow software development best practices including writing unit tests and perform code reviews
  •    Build reusable components and libraries and optimize for maximum performance
  •    Provide production deployment support and troubleshooting

What you need to be ready: 

•  Minimum 3+ years of experience in UI Development
•  Thorough understanding of React.js and its core principles with minimum 2 years of experience
•  Prior experience in building customer facing web Application
  •    In-depth knowledge of HTML, Typescript/JavaScript, CSS/Sass, and related frameworks and libraries
  •    Thorough understanding of React.js and its core principles with minimum 2 years of experience
  •    Experience in Single Page Application architecture
  •    Proficient in writing tests using Jest, Mocha or any similar framework
  •    Strong computer science fundamentals in design, data structures, and problem solving
  •    Excellent troubleshooting skills