
Our client is the Health-tech initiative of India's largest business house. Started in 2015, it empowers healthcare providers and consumers in India. All healthcare monitoring services are made available through an app that will help connect doctors, hospitals, pharmacies, laboratories and consumers, enabling preventive and predictive healthcare. It helps the care-givers to track the entire patient journey from the initial appointment and maintaining their records, generating lab test reports to providing virtual consultation and home-care solutions. It is expected that this futuristic guide will strengthen the doctor-patient relationship and enhance the in-clinic experience.
As the React JS- Developer,you will be responsible for developing a flexible and well-structured front-end architecture, that is robust, scalable and aesthetically appealing for our cutting edge health-tech applications
What you will do:
- Building Progressive Web App components and features for the companys advanced health-tech platform using React Js, Node Js
- Communicating effectively in a cross-functional product development team and presenting ideas and solutions effectively.
What you need to have:
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Good understanding of HTML5 and CSS3
- Thorough understanding of React.js and its core principles
- Experience in building new components and features for a Progressive Web App using React JS and Node JS
- Experience with popular React.js workflows (such as Flux or Redux)
- Experience with integration of RESTful APIs
- Familiarity with modern front-end build pipelines and tools
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
- Proficient understanding of code versioning tools, such as Git or SVN
- Excellent problem-solving skills

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Job Title: Senior Frontend Developer (Angular) – L4
Location: Mumbai
Experience: 7–12 Years
Role Overview
We are seeking an experienced Angular Developer (L4 level) with strong expertise in modern frontend technologies to build scalable, high-performance web applications. The ideal candidate will have deep experience in Angular, TypeScript, RxJs, ngRx, and a strong focus on unit testing and code quality.
Key Responsibilities
- Develop and maintain complex web applications using Angular (latest versions)
- Write clean, scalable, and maintainable code using TypeScript
- Implement reactive programming patterns using RxJs
- Manage application state effectively using ngRx (Store, Effects, Reducers)
- Design and implement reusable, performant UI components
- Ensure high code quality through unit testing (Jasmine/Karma or similar)
- Collaborate with backend teams, UX designers, and product stakeholders
- Optimize applications for maximum performance and scalability
- Participate in code reviews, architecture discussions, and technical decision-making
- Troubleshoot and debug complex application issues
Required Skills
- Strong experience with Angular (v10 or above preferred)
- Proficiency in TypeScript, JavaScript (ES6+)
- Hands-on expertise in RxJs (Observables, Operators, Subjects)
- Solid understanding of ngRx architecture and state management concepts
- Experience in Unit Testing frameworks (Jasmine, Karma, Jest, etc.)
- Knowledge of REST APIs and integration
- Familiarity with HTML5, CSS3, SCSS, and responsive design
- Understanding of frontend performance optimization techniques
- Experience with Git/version control systems
Preferred Qualifications
- Experience with CI/CD pipelines
- Exposure to micro-frontend architecture
- Knowledge of Agile/Scrum methodologies
- Familiarity with AWS/Azure or cloud-based deployments
- Strong problem-solving and analytical skills
- Behavioral Competencies
- Strong communication and collaboration skills
- Ability to mentor junior developers
- Ownership mindset and attention to detail
- Adaptability in a fast-paced environment
Seniority Level
L4 (Senior Individual Contributor)
Expected to drive modules independently and influence technical decisions
Job Title: React Lead Developer
Location: Airoli, Mumbai
Work Mode: Work from Office (WFO) – Full-time
About the Role:
We are seeking a highly skilled and experienced React Lead Developer to join our growing team in Airoli, Mumbai. The ideal candidate will lead front-end development efforts, mentor developers, collaborate closely with cross-functional teams, and play a key role in delivering scalable, high-performance web applications.
Key Responsibilities:
- Lead the design and development of responsive web applications using React.js
- Collaborate with UX/UI designers, product managers, and backend teams to deliver high-quality products
- Write clean, maintainable, and well-documented code
- Optimize applications for performance and scalability
- Conduct code reviews and ensure coding best practices are followed
- Mentor and guide junior developers in the team
- Participate in architectural discussions and contribute to tech strategy
- Keep up with emerging trends and technologies in frontend development
Required Skills & Experience:
- 6+ years of experience in frontend development, with at least 3 years in React.js
- Strong proficiency in JavaScript (ES6+), HTML5, CSS3, Redux, and REST APIs
- Experience with React Hooks, Context API, and component-based architecture
- Familiarity with Webpack, Babel, and modern build tools
- Experience with version control tools like Git
- Exposure to Agile methodologies and CI/CD pipelines
- Strong problem-solving and debugging skills
- Excellent communication and leadership qualities
Nice to Have:
- Experience with TypeScript, Next.js, or React Native
- Exposure to cloud platforms (AWS/Azure)
- Familiarity with testing frameworks (Jest, Cypress, etc.)
Education:
Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field
Duration: 3 Months
Type: Hybrid(Gurgaon); Paid
Joining: Immediate
Who's a fit:
- Experience with React Native and ReactJS
- Excellent problem-solving and logical thinking
- Completed a degree in Computer Science, Engineering, or related field
- Projects to showcase your skills
The ideal candidate will be responsible for developing highly scalable and secure code.
- Proficient in client & server-side JavaScript, HTML5, CSS3 and webpack
- Competent in building single page web applications using Node.js and React Js
- Redux for state management
- Universal rendering (Client-side rendering and Server-side rendering)
- Experience with cross-browser, cross-platform, and design constraints on the web
- Experience in developing automated unit and functional tests
- Experience in an agile development process
- Solid knowledge of algorithms and design patterns
- Have a passion for quality and writing clean, readable code that scales and performs well
- Good interpersonal communication skills
- 1+ years of software design and web application development
Culture
- Fast-paced, intellectually stimulating, steep learning, and growth
- Close-knit, hardworking, supportive colleagues
- Challenging work
- Flat organization with no hierarchy
- If you like problem solving, and love latest technology, there are very few better places
How we are different
-We are young and dynamic team who are obsessed with solving business problem at scale -We are a technology agnostic company who focus more on finding the optimal solution to business problem rather than technology
Why to join us
-We provide huge learning curve. Spending 1.5-2 years with us will put you 3 years ahead in the career
-We work only on cutting edge technology like React, React Native, Flutter, NodeJS, Python, Go, Svelte, ELM
-There are two technology Co-founder in the company who are pretty much hands-on and have earlier bult the Consumer application which is downloaded millions of time and are in leadership position in copanies like Samsung, Purplle, Loylty Rewardz
-Get mentored by the best in the industry
-Flexible working hours
-Perks best in the industry
● Work on products that are used across platforms (e.g. Android and iOS Mobile Devices,
Tablets, Desktop/Mac)
● Analyse current products in development, including performance, scalability, diagnosis and troubleshooting
● Work with the existing framework and evolve it by building reusable code & libraries
● Search and introduce new software related technologies, processes and tools.
● Collaborate with other team members
● Working on the robustness of the application
Key Skills Required:
● Strong hands on experience in JavaScript, HTML5, CSS3, CSS3 Animations.
● Good understanding of advanced JS libraries and frameworks such as React.js and Angular.
● Understanding of client side unidirectional data flow principles and Redux knowledge.
● Good understanding of - React Native - is a big plus.
● UI Performance: should have hands-on experience of optimizing page load, rendering,
caching.
● NodeJS, Webpack knowledge is a plus.
● Proficient understanding of cross browser compatibility issues and ways to work around such issues.
● Fluent in responsive design and mobile / tablet UI / UX.
● Web mobile (touch devices: mobiles and tablets) experience is expected.
● Familiarity with JavaScript standards(ES5,ES6) and OOPS concepts.
- HTML & Java script. Experience with basic GMB etc. PHP exposure. Willingness to work on app and plug –ins etc is welcome.
- Custom Module development
- Front End Development skills (any of below):
- HTML5, PHP
- Shopify
- Magento (1.x & 2.x)
- Big Commerce
- Wordpress
- Server Setup
- At TailNode, we are at the bleeding edge of this change.
- We conceptualize and develop products that are aimed to enable this transformation of the political architecture of the country.
- We leverage the best practices and insights of the technology world and apply them in our unique way to deliver impact on a massive scale.
- We want to offer you a once in a lifetime opportunity to be a part of this massive change and build new and exciting products with us
- We are seeking motivated and self-driven Frontend React JS Developer.
- You will be building product features by solving complex problems using cutting-edge technologies in an ownership and integrity driven culture.
The Role :
- As a Frontend Developer, your role will be to work closely with the design team and execute their ideas to reality.
- Ensuring that design is adhered to in building leading edge Frontend solutions.
- Translate designs and wireframes into high quality code.
- Design, build, and maintain high performance, reusable, and reliable code.
- Ensure the best possible performance, quality, and responsiveness of the application.
- Identify and fix bugs.
- Help maintain code quality and organization.
Skills and Experience Required :
- At least 2-5 years of frontend development experience.
- Should have hands-on development experience in React JS.
- Exceptionally able with key development tools - JS/HTML5/CSS, React JS, experience working with REST APIs.
- Proficient understanding of CSS frameworks & architecture (Material-UI, Bootstrap, BEM etc).
- Proficient understanding of SASS/Preprocessors, Webpack, npm and Git.
- Should be familiar with Test Driven Development and are familiar with relevant testing frameworks (Jest, cypress, react-testing-library).
- Well versed with core JavaScript & React JS concepts.
- Should have experience in working with Context API, Hooks & Redux.
- Proficient understanding of cross-browser compatibility and responsive design.
- Good understanding of SEO & accessibility principles and ensuring that our applications will adhere to them.
Full-Stack Developer
Job Description
Participating in the design and creation of scalable software
Writing clean, functional code on the front- and back-end
Testing and fixing bugs or other coding issues
Job Description: -
We are looking for a Full Stack Developer to produce scalable software solutions. You’ll be part of a cross-functional team that’s responsible for the full software development life cycle, from conception to deployment.
As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks, and third-party libraries. You should also be a team player with a knack for visual design and utility.
If you’re also familiar with Agile methodologies, we’d like to meet you.
Responsibilities
Work with development teams and product managers to ideate software solutions
Design client-side and server-side architecture
Build the front-end of applications through appealing visual design
Develop and manage well-functioning databases and applications
Write effective APIs
Test software to ensure responsiveness and efficiency
Troubleshoot, debug and upgrade software
Create security and data protection settings
Build features and applications with a mobile responsive design
Write technical documentation
Work with data scientists and analysts to improve software
Requirements
Proven experience as a Full Stack Developer or similar role
Experience developing desktop and mobile applications
Familiarity with common stacks
Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
Knowledge of multiple back-end languages (e.g. C#, Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js)
Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design
Excellent communication and teamwork skills
Great attention to detail
Organizational skills
An analytical mind
Degree in Computer Science, Statistics or relevant field
Responsibilities
- 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.
- 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.
Requirements
- Bachelor’s degree in Computer Science, Information Technology, or a similar field.
- 2-7 years of work experience in React.Js and Redux.
- In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
- Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
- Experience with user interface design.
- Experience with browser-based debugging and performance testing software.
- Excellent troubleshooting skills.
- Good project management skills.
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












