Frontend Developer

About the Role:

We are seeking a skilled and enthusiastic React.js Web Developer to join our technology team. The ideal candidate will be responsible for building high-quality user interfaces, enhancing user experience, and developing efficient web applications.

Key Responsibilities:

1. Develop responsive, interactive, and high-performing web applications using React.js, JavaScript/TypeScript, and modern front-end libraries.

2. Translate UI/UX wireframes into high-quality code and reusable components.

3. Optimize components for maximum performance across various devices and browsers.

4. Work with the team to design, structure, and maintain scalable front-end application architecture.

5. Integrate REST APIs, third-party services, and internal tools into the application.

6. Manage application state using tools such as Redux, Context API, or other state management libraries.

7. Write clean, readable, and well-documented code following best industry practices.

8. Conduct thorough debugging, troubleshooting, and performance enhancements.

9. Assist in deployment processes and ensure the application works smoothly in production.

10. Familiarity with CI/CD pipelines is an added advantage.

11. Collaborate with the team on planning, development, and code reviews.

12. Stay updated with the latest technologies and development best practices.

Required Skills & Qualifications:

• Bachelors degree in Computer Science, IT, or related field (or equivalent experience).
• 2 - 3+ years of experience in React JS development.
• Strong proficiency in JavaScript (ES6+), HTML5, CSS3.
• Hands-on experience with React Hooks, Redux, Context API, and component-based architecture.
• Good understanding of REST APIs and asynchronous request handling.
• Experience with build tools like Webpack, Babel, Vite, etc.
• Familiarity with Git/GitHub and version control workflows.
• Knowledge of responsive design and cross-browser compatibility.
• Strong problem-solving and analytical abilities.
• Ability to work independently as well as in a team environment.
• Time management skills and ability to meet deadlines.
• A positive attitude and willingness to learn new technologies.

Why Join Us?

• Competitive Salary and Professional development opportunities and training.
• Opportunity to work with cutting-edge technologies in a fast-paced environment.
• A supportive environment that encourages learning and growth.
• Collaborative team culture focused on creativity and continuous improvement.

About Our Client

Our client is a Currency Exchange in India. Built with user experience and security in mind, Our Client provides instant fiat to crypto conversions with zero fees, so that users can have access to a diverse suite of financial products and services that are backed by industry-leading security processes and insurance protection. Our Client aims to be the global gateway to cryptocurrencies. Its proprietary liquidity aggregation model provides its users with access to liquidity from leading global crypto exchanges. Our Client is recognized and awarded for its contribution to the Indian emerging tech space.

Why Our Client?

Cryptocurrency Traders are looking for a strong global platform that can help them trade faster, better and smarter. We are building a platform that can solve their needs. The opportunity is big, and the journey is tough. Now that’s a challenge that needs to be addressed. You do that. You are phenomenal in solving these complex challenges. You help our team do more.


As a Front End Developer - Angular, you do all of the above and more. You make a difference.

What will I do?

• Delivering a complete front end application
  • Ensuring high performance on mobile and desktop
  • Writing tested, idiomatic, and documented JavaScript, HTML, and CSS
  • Coordinating the workflow between the graphic designer, the HTML coder, and yourself
  • Cooperating with the back-end developer in the process of building the RESTful API
  • Communicating with external web services
  • Ensure high-quality graphic standards and brand consistency
  • Stay up-to-date on emerging technologies
  • Write functional requirement documents and guides

What skills should I have?

- Must have 6+ years of experience in frontend development with an internet startup.
- Deep knowledge of Angular practices and commonly used modules based on extensive work experience
- Proficiency with JavaScript and HTML5
- Extensive knowledge of CSS and JS methods for providing performance visual effects and keeping the frame rate above 30fps at all times
- Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
- Creating custom, general use modules and components which extend the elements and modules of core Angular
- Ability to understand business requirements and translate them into technical requirements

• Delivering a complete front end application
• Ensuring high performance on mobile and desktop
• Writing tested, idiomatic, and documented JavaScript, HTML and CSS
• Coordinating the workflow between the graphic designer, the HTML coder, and yourself
• Cooperating with the back-end developer in the process of building the RESTful API
• Communicating with external web services

 Skills and Competencies:

• Proficiency with JavaScript, TypeScript, HTML and CSS
• Fundamental Knowledge of an SPA (Single page application)
• Deep knowledge of AngularJS practices and commonly used modules based on extensive work experience
• Ability to provide SEO solutions for single page apps
• Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
• Validating user actions on the client side and providing responsive feedback
• Writing non-blocking, optimized, reusable and scalable code
• Creating custom, general use modules and components which extend the elements and modules of core Angular
• Experience with building the infrastructure for serving the front-end app and assets
• Architecting and automating the build process for production, using task runners or scripts
• Creating configuration, build, and test scripts for Continuous Integration environments
• Proficient understanding of code versioning tools such as git is required
• Excellent presentation, problem-solving and team working skills

Qualification and Experience:

• B.E. / B. Tech. / MCA / PGDCA / M.Sc. (CS) /M.E. / M. Tech
• At least 2 years of experience in Web Application Development with Angular/React
• Proven expertise in testing of application software to assure accuracy, integrity, completeness to achieve desired results
• Experience with AngularJS (v1.x.x) would be a value-add

• Develop new-user facing features using React.Js and Redux, D3.Js
• Build robust, reusable, and easy to maintain components.
• Translate designs and mock-ups into high quality code.
• Work closely with the Support team and Product team to identify issues and bugs in the platform and fix it.
• Completely own the SDLC of your tickets. From dev to production.
• Talk to existing clients about platform bugs and ensure the bugs are fixed.

• Minimum 4 years’ experience with React.js and Redux
• You are a well-organised self-starter with excellent communication skills
• You have thorough and demonstrable understanding of React.js and it’s core principles
• You have experience with code versioning (GIT) and CI/CD (Jenkins, Circle, etc.) tools
• You have ability to translate business requirements into high quality, high performance code
• You are familiar with RESTful API’s
• You enjoy working independently with minimal supervision
• You have broad understanding and experience in Javascript based technologies
• You are comfortable working in fast paced environment
• You are familiar and up-to-date with common front-end dev tools (e.g. Babel, Webpack, NPM, Yarn, etc..)
• Sharp analytical and problem-solving skills.
• Strong sense of ownership.
• Demonstrable desire to learn and grow.
• Excellent written and oral communication skills.

Roles , Responsibilities& Skills  :-

• Proficiency in js, deep knowledge of SQL and NoSQL databases.
• Knowledge of ElasticSearch is a plus.
• Design, build and maintain high performance, reusable system applying best Engineering practices.
• Experience in building and consuming REST API.
• Work with Agile methodology
• Go getter attitude with delivery mindset.
• Strong communication skills across the board, with a passion for finding and sharing best practices and driving greater discipline.
• Team player
• Ability to multi-task and work in fast paced environment
• Quality focus.

UI experience

• Angular Version 7+ or React experience
• Knowledge of CSS/design frameworks
• Ability to coordinate and implement UX designs.

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

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.

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

We are building a workspace for Marketing teams - Think Webflow for Marketing teams, Grafana for Marketing teams who operate on large data sets and need a clear intuitive interface to look at all their data.

Traditionally Marketing teams have always had to depend on a large BI team to provide them with the data they need to make decisions. Clarisights eliminates this by giving Marketing teams everything they need in one intuitive, collaborative reporting platform.

We work with large enterprise Marketing teams around the world like Delivery Hero - The world's largest food delivery co., HelloFresh the world's largest mealkits delivery co. etc.

Our platform is central to how business teams make decisions and you will work on the interface that these teams use. We are helping non technical business users get comfortable with data by giving them a platform they can use to drive.

What makes this role challenging? Think Google Docs, Slides and Sheets all combined in one platform. We have a collaborative text editor which is used by teams together and we built our table grid which is extremely powerful. Tables, being one of the heaviest and most used widgets we have, have records composed of metric data(averages, share percentages, comparison data), multiple creatives(images, videos, gifs), trends(charts inside each cell) and a lot more.

The huge amount of data points naturally increases the amount of DOM nodes and thus it becomes memory heavy and CPU intensive to run the app in the browser. One table can have 500 records that the users can scroll through at once. Now imagine having 10+ of such tables in one tab, and each report comprising of multiple tabs. And we also support features like drilldowns/breakdowns, column freezing, row freezing, in the tables all while ensuring a smooth user experience.

We decided to build it from scratch using React Virtualize since most table libraries did not give us the performance or features we need. We also extensively use charts to visualize data and as we are scaling, a lot of these components have to be rebuilt to handle the volume of data we process.

We are only getting started, we want to make our platform a lot more collaborative and immersive by giving teams ability to interact with charts by adding annotations and ability to tag team members and leave notes for them. This might seem a solved problem when you look at collaboration on Google Docs but it's an extremely tricky problem for us as we don't deal with static data the way you have it with Google Docs.

Unlike read only dashboards which do not allow edits after building, our platform is meant for collaboration within teams. Think of how shitty collaboration was for design teams before Figma.

We are looking for someone who obsesses over performance and is comfortable with profiling performance, can think of frontend architecture. We are also looking for a lead who can mentor the team on performance and scale.

While working with such complex interfaces, often times, performance and the tech becomes a bottleneck for the user experience we strive for. We are looking for someone who —

• Understands fundamentals of Application Design and has designed/architected applications from scratch.
• Has worked on large-scale applications, and setup/maintained its data pipelines (data flows from backend to frontend)
• Has architected efficient and reusable front-end systems that drive complex web applications

• 3+ years of JavaScript experience, including concepts like asynchronous programming, closures, types.
• HTML/CSS experience, including concepts like layout, specificity, cross browser compatibility, and accessibility
• Experience with browser APIs and optimizing frontend performance
• Previous experience with dashboard apps, charts framework, window virtualisation
• Has written Generators for project setup
• Comfortable with tech like Postgres, Docker, Rails
• Understands tooling like Webpack, Babel

Experience with React and Typescript is preferable but not necessary.

• Understanding the data flow and familiarise oneself with the app components
• One feature/task like updating something that touches majority of the app — this is again aimed to get familiarity with the whole codebase in the quickest way
• Synchronising the data pipelines by adopting better serialisation protocols
• Creating avenues to improve app performance (by profiling and benchmarking)