
Frontend Developer
We are inspiring the next generation of young innovators and entrepreneurs in India. We're an education startup co-founded by a Computer Science grad from MIT/Harvard and the former CEO of Apple India. We started out as code school, offering creative tech boot-camps on topics like Drone Programming, Android App Development, Game Programming, Full-Stack Web Development to k-12 students across the nation, and now we're building web and mobile products to deliver powerful learning experiences to students online, at scale.
Job Description
We are looking for a Front End developer who is excellent with JavaScript (React.js + Redux). Some proficiency with Node.js preferred as you’ll be hooking up your front-ends to APIs and occasionally writing your own.
Your primary focus will be to develop the UI/UX for highly interactive / social / multiplayer learning platform, across the Student Product, Parent Product, Teacher Product, Virtual Classroom, and more.
Responsibilities
- Translating designs and wireframes into high quality React code
- Styling re-usable components with pixel perfection and mobile responsiveness
- Structuring state and information flow across your front-end app using Redux
- Optimizing your code for SEO and maximum performance across a vast array of web-capable devices and browsers
Skills / Required Experience
- 3+ years of hands-on experience with React.js
- 2+ years of hands-on experience with Redux
- Bonus: past experience with Socket.io and WebRTC
- Writing and consuming REST APIs with Node.js
- A knack for benchmarking and optimization
- Familiarity with modern front-end build pipelines and tools

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Responsibilities
- Take product ideas from ideation to implementation.
- Collaborate with Product and Design to create robust and usable features.
- Take ownership of the architecture for best performance and usability.
- Lead engineering discussions to ensure the best practices, maintainability and security of the application.
- Participate in design and code reviews.
- Lead and mentor the team of developers, to drive business objectives.
We are looking for
- 4+ years of experience building quality applications.
- Proficient in client-side JS frameworks such as React.js
- Passion for best design and coding practices and a desire to develop new bold ideas.
- Strong customer focus, ownership, and self-drive.
- Experience in planning, designing architecture and leading teams.
What you’ll be doing
- Lead the development of our platform’s front end.
- Work with the product and design teams along with the founders to build new product features from start to finish: through conception, research, implementation, and maintenance.
- Work closely with founders and internal/external stakeholders to build products, tools, and services from scratch and deliver high-quality software solutions.
- You'll leverage your frontend knowledge to help improve performance and reliability, and polish existing features.
- Share your technical expertise to help the team make thoughtful and scalable design decisions and identify performance bottlenecks to troubleshoot quickly.
- Manage product development priorities, deadlines, and deliverables.
- Ensure high-performant and responsive web applications and websites.
Skills & Qualities we’re looking for
- Bachelor’s/Master’s degree in Computer Science (or equivalent experience).
- 2-4 years of experience as a frontend developer (rare exceptions for highly skilled developers) at a fast-paced, preferably early / growth stage start-up.
- You're familiar with HTML, CSS, Javascript, and a React-like UI framework.
- Knowledge of codebases and version control systems (Git).
- You have experience debugging performance issues with UI in modern browsers across multiple platforms.
- Well-versed with SQL database design & RDBMS concepts.
- Strong arithmetic reasoning, logical and analytical thinking skills.
- Strong knowledge of code quality maintenance and performance analysis.
Responsibilities-
- Work closely with design, product management, and development teams to create elegant, usable, responsive, and interactive interfaces across multiple devices.
- Turning UI/UX designs into prototypes, creating awesome interactions from designs, writing reusable content modules, and maintainability of the code.
- Implement UI development principles to ensure that the product client-side serves at scale.
- Review and optimize usage by monitoring key metrics and rectifying the issues proactively.
- An ability to perform well in a fast-paced environment and bring in optimal flow for rapidly changing design/ technology.
Requirements-
- 3 to 6 years of relevant work experience as a web developer, UI developer, JavaScript expert, or frontend engineer
- Sound knowledge in JavaScript, ReactJS, HTML, CSS
- Familiar with UI layouts, SASS, bootstrap, and Material UI
- Experience debugging using popular JavaScript-based tools like Chrome Developer Console
- Knowledge of TDD frameworks mocha, chai, jest etc.
- Understanding of Typescript
- Understanding of ReactJS based frameworks like NextJS, Gatsby, etc.
- Understanding of REST API
- Passionate to create good design and usability
Responsibilities :
Build awesome web experiences using React.js
Plan and accommodate all mediums, screen sizes and device types
Build in flexibility and customization from the start
Internalize the user and promote good usability and accessibility in every experience
Be nimble and react quickly to changing business conditions
Work with product managers, content producers, QA engineers and release engineers to own your solution from development to production
Qualifications :
5+ years building web and/or mobile experiences with evidence of exceptional ability
Bachelor’s Degree in Computer Science or related field, or equivalent experience or other evidence of exceptional ability
Solid understanding of fundamental web technologies such as HTTP, REST, AJAX and JSON.
Strong proficiency in JavaScript / ES6, including DOM manipulation and the JavaScript object model
Thorough understanding of React.js and its core principles
Unit Testing with Jest/Enzyme
Experience with Redux
Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
Experience working with RESTful APIs
Experience with Nodejs, Expressjs or NextJs
Excellent mastery of web standards, cross-browser compatibility, accessibility and SEO.
Strong CSS skills w/ experience building responsive applications across a variety of browsers and devices using modern CSS3 techniques
Ability to identify tasks which require automation and automate them
Expert knowledge of maintaining and debugging live software systems
Prior experience with Symfony MVC frameworks desirable.
Job Description
SDE-II (FE)
Responsibilities
- Gather functional requirements from product management/UX teams and translate requirements into technical specifications to build robust, scalable, supportable solutions
- Serve as technical lead throughout the full development lifecycle, end-to-end, from scoping, planning, conception, design, implementation and testing, to documentation, delivery and maintenance.
- Provide design reviews for other engineers, including feedback on architecture and design issues, as well as integration and performance.
- Manage resources on multiple technical projects and ensure schedules, milestones, and priorities are compatible with technology and business goals.
- Develop new user-facing features
- Build reusable code and libraries for future use
- Ensure the technical feasibility of UI/UX designs
- Optimize application for maximum speed and scalability
- Assure that all user input is validated before submitting to back-end
- Collaborate with other team members and stakeholders
Requirements
- Proficient understanding of web markup, including HTML5, CSS3
- Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
- Proficient understanding of client-side scripting and JavaScript frameworks, including jQuery
- Good understanding of AngularJS, ReactJS
- Good understanding of asynchronous request handling, partial page updates, and AJAX
- Basic knowledge of image authoring tools, to be able to crop, resize, or perform small adjustments on an image. Familiarity with tools such as as Gimp or Photoshop is a plus.
- Proficient understanding of cross-browser compatibility issues and ways to work around them.
- Proficient understanding of git
- Good understanding of SEO principles and ensuring that the application will adhere to them.
- BTech/BE Equivalent.
- 3-5 years of experience

- Work with other developers to ensure that the website is functional and visually appealing.
- Liaise with the client to gauge their needs and expectations.
- Plan the layout of the website.
- Ensure that the website is optimized for various devices.
- Use analytics to test client enjoyment.
- Building reusable code and libraries for future use.
- Implementation of security and data protection.
Requirements:
- Experience should be at least 3 Years
- Should be good in UI
- Should be proficient in Typescript, React Native and React Js
- Proficiency in HTML, JavaScript, jQuery, and CSS.
- Good interpersonal skills.
- Understanding of key design principles.
- Good problem-solving skills.
- Would prefer to have someone from the gaming industry/poker industry or someone who is interested in the poker game development
We do have opening with our company Crownstack Technologies for React.Js Developer. Interested candidate can share their CV.
About us
Crownstack is a premium organisation that specializes in providing innovative digital technology solutions to various enterprises including startups, small and medium-sized businesses and Fortune 500 companies across the globe. Our services include, but are not limited to, UI design, mobile app and web development, Cloud computing, data analytics, and Dev Ops. We take pride in our ingenious, meticulous, and skilled workforce who aim to deliver sustainable and cutting-edge business and technology solutions to all our clients. ★ 100+ Successful Apps Delivered | ★ Enterprise and Startup Clients | ★ Scalable Products | ★ MEAN Stack | ★ Python, pHp, NodeJs | ★ Agile Development | ★ Best UI/UX Award
Job Description
Crownstack is looking for ReactJs Developers to join our team and deliver a streamlined user experience. We want a team member who strives to develop a first-class codebase using ReactJs best practices. As a React Developer, you will implement a complete user interface across our mobile and desktop web interfaces.
Requirements
Job Location: Gurgaon/Noida
Experience: 2+ years
Roles and Responsibilities
- Develop user interfaces with the latest frontend technologies
- Research, analyze, and develop product features of increasingly complex nature
- Code tested and documented JavaScript, HTML, PUG and CSS
- Make design and technical decisions for ReactJs projects.
- Develop application code and unit testing in the ReactJs with REST APIs
- Ensure high performance of all systems developed
Skills and Qualifications
- 2+ years experience with ReactJs
- Strong expertise with HTML, CSS, and writing cross-browser compatible code.
- Experienced in Typescript is a plus
- Familiarity with testing frameworks (Ex. Enzyme)
- Experience in building highly reusable and decoupled components
- Experience in State management Libraries like Redux, mobx
- Critical thinking and problem-solving skills
- Good time-management skills
- Great interpersonal and communication skills








