Senior React Js(Looking for an Immediate joiner)_Mumbai
Relevant in React JS: 2 + Years
Looking for candidates from Mumbai who can go to the office in Mumbai(Malad) after Covid ends.
- Knowledge of OO JavaScript
- 7.2. 10+ years hands-on experience with web development using
- HTML5, JavaScript (React, Preact.js, Redux, Redux, Vue.js,
- CSS3, SignalR, Socket.io)
- 7.3. Experience building responsive design layouts using a formal
- framework like Bootstrap and familiarity with best practices
- (web security concepts, ensuring browser & device
- compatibility, etc.)
- 7.4. Experience in creating secure pre-compiled script libraries.
- 7.5. Familiar with development and debugging tools for cross-
- browser issues
- 7.6. Experience integrating with RESTful APIs for server-side

Similar jobs
We are seeking a highly motivated Software Development Engineer with expertise in building scalable, extensible and user-friendly web applications. You will work with a fast paced Product Engineering team to build efficient and reusable web applications for mobile and fixed devices.
What you’ll do:
- Architect, Design, Code reviews and build scalable applications.
- You will be engaged in identifying and addressing performance bottlenecks, and collaborate with other team members to innovate current/new products.
- Identify, communicate and implement best practices for application engineering.
- Ensure high scalability and performance
- You will advocate for good, clean, well-documented and performing code; define and follow standards and best practices for front-end development.
We’d love for you to have:
- Experience: 1-3 yrs recent experience of working in a scalable web product firm
- Education: B.Tech/M.Tech in Computer Science from Top ranked colleges in India
- Excellent software development skills in developing web applications over client-side frameworks - Backbone, React (preferred) and/or angular frameworks (preferred); and server-side frameworks like node.js
- Excellent programming skills in object-oriented, modularised JavaScript, Typescript (preferred)
- Strong knowledge and working experience in server-side Event-driven programming using Node.js
- Excellent programming skills in Javascript, jQuery, AJAX, YUI.
- Passion for writing optimized code using JS best practices and design patterns
- Experience with JS or Java-based Unit/Integration Testing using Selenium, Appium, Selendroid
- Hands-on experience in building scalable web applications
- Excellent problem solving and debugging skills
- Good Knowledge of version control - GIT (preferred)
- Experience with the full software development lifecycle, design, develop, debug, document, and deliver (especially in a multiple site organization)
- Strong verbal and written communication skills
- Ability to deliver great results in an agile development
- Good to have: Working knowledge of web standards (i.e., REST) and OOPS
- Good to have: Experience in Data Structures, Algorithms and their optimization
Even if you don’t meet all of these qualifications above, we’d still love to hear from you. Tell us about your unique qualifications in your cover letter.
CaaStle is committed to equality of opportunity in employment. It has been and will continue to be the policy of CaaStle to provide full and equal employment opportunities to all employees and candidates for employment without regard to race, color, religion, national or ethnic origin, veteran status, age, sexual orientation, gender identity, or physical or mental disability. This policy applies to all terms, conditions and privileges of employment, such as those pertaining to training, transfer, promotion, compensation and recreational programs.
Job Location: Gurgaon/Noida
Current Work Mode: Hybrid
Work Timings: AEST Timings
About the Role
We are looking for high-calibre Frontend Engineers with strong expertise in React or Angular to join a fast-paced branding and product experience initiative. This role will focus on delivering a premium UI/UX transformation, including a dashboard uplift, within a tight timeline.
This is a hands-on role suited for engineers who thrive in high-impact, fast-execution environments and can take ownership from concept to delivery.
Key Responsibilities
- Build and enhance modern, scalable front-end applications using React or Angular
- Drive the branding implementation across web interfaces and dashboards
- Collaborate closely with design, product, and backend teams
- Contribute to dashboard improvements, performance optimization, and usability enhancements
- Integrate front-end components with backend services (including .NET-based APIs)
- Leverage AI tools (e.g., Claude, ChatGPT, GitHub Copilot) to improve productivity, code quality, and development speed
- Ensure high standards of code quality, responsiveness, and cross-browser compatibility
Required Skills & Experience
- Strong hands-on experience with React.js or Angular (either is mandatory)
- Solid understanding of HTML, CSS, JavaScript/TypeScript
- Experience building data-driven dashboards and UI-heavy applications
- Working knowledge of .NET / C# backend integration
- Familiarity with or openness to using AI-assisted development tools (e.g., Claude, Copilot, ChatGPT)
- Strong eye for design, layout, and user experience
- Ability to work in fast-paced, deadline-driven environments
Nice to Have
- Experience with design systems or branding projects
- Exposure to performance optimization and front-end architecture
- Experience working in agile/sprint-based delivery models
What We’re Looking For
- Engineers who take ownership and move fast
- Strong problem-solvers with attention to detail
- Comfortable leveraging modern tools, including AI, to accelerate delivery
- Clear communicators who can collaborate across teams
- Comfortable working under tight timelines with high expectations
Why Join
- Opportunity to work on a high-visibility branding initiative
- Fast-paced environment with real impact
- Collaborative and outcome-driven team
JOB DESCRIPTION:
- The Development family is responsible for creating, designing, deploying, and supporting applications, programs, and software solutions.
- May include research, new development, prototyping, modification, reuse, re-engineering, maintenance, or any other activities related to software products used internally or externally on product platforms supported by the firm.
- The software development process requires in-depth subject matter expertise in existing and emerging development methodologies, tools, and programming languages.
- Software Developers work closely with business partners and / or external clients in defining requirements and implementing solutions.
RESPONSIBILITIES:
- Lead technical processes and designs considering reliability, data integrity, maintainability, reuse, extensibility, usability, and scalability.
- Review code of development team to ensure quality and adherence to best practices and standards.
- Mentor junior developers to develop their skills and build strong talent.
- Collaborate with Infrastructure partners to identify and deploy optimal hosting environments.
- Define scalability and performance criteria for assigned applications.
- Ensure application meets the performance, privacy, and security requirements.
- Verify test plans to ensure compliance with performance and security requirements.
- Support business and technical presentations in relation to technology platforms and business solutions.
- Mitigate risk by following established procedures and monitoring controls.
- Help develop solutions that balance cost and delivery while meeting business requirements.
- implement technology-specific best practices that are consistent with corporate standards.
- Partner with cross-functional teams to ensure the success of product strategy and project deliverables.
- Manage the software development process.
- Drive new technical and business process improvements.
- Estimate total costs of modules/projects covering both hours and expense.
- Research and evaluate specific technologies, and applications, and contributes to the solution design.
- Construct application Architecture encompassing end-to-end designs.
- Mitigates risk by following established procedures and monitoring controls, spotting key errors, and demonstrating strong ethical behavior.
QUALIFICATIONS:
- Bachelor's degree required with Masters, or equivalent experience preferred
- Minimum of 7 years of related experience.
- 7+ Years of Active Development Experience/ Expertise in Java/J2EE Based Applications proven ability with Hibernate, JPA, Spring, Spring MVC
- Exposure to XML/XSD, JSON and similar data presentation components
- Familiarity with Microservices based architecture and distributed systems.
- Ability to develop and work with REST APIs using Spring Boot framework.
- Knowledge of IBM MQ and messaging protocols such as JMS
- Understanding of Unix/Linux OS including shell scripting
- Strong database and PL/SQL skills
- Experience with CI/CD technologies like GIT, Jenkins, JoCoCo and Maven
- Experience with UI frameworks - Angular, NodeJS and NPM is a plus
- Experience with CSS, HTML, JavaScript, and similar UI frameworks (jQuery, React Angular) is a plus
- Familiarity with Agile development methodology
Job Description
About Jodo:-
A mission-oriented early-stage fin-tech startup which is building a suite of carefully tailored financial products and delivery mechanisms to fulfill the aspirations and needs of middle-income households in urban India. Jodo is started by three co-founders, who have a pedigreed education background (IIT/IIM) and relevant professional experience in financial services. More importantly, they come from a similar background as the customer segment they are serving, and have done extensive customer research to understands the needs of the customer. It is backed by high-quality investors.
Responsibilities:-
-UI developer should be highly skilled in Web Design and implementation with a passion for building great web-based user interfaces.
-Elegantly implement page designs in standards-compliant dynamic XHTML and CSS.
-Strong knowledge of internet/web technologies and languages such as javascript, jQuery, DHTML, CSS/XHTML, XML, JSON API.
-Advocating Web interaction design best practices with a focus on consistency and usability.
-Create rapid prototypes of interfaces to be used as a blueprint for content and technical development.
-Work closely with back-end developers to find ways to push the limits of existing Web technology in service of creating the best possible user experience.
-Ensuring pages are programmed error-free, cross-browser, cross-platform, and optimized for download performance.
- 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.
Strong on HTML,CSS & JAVASCRIPT
• Technical end-to-end design for stories by collaborating with business analyst/product owner, technical architect and clients
• Implement stories end-to-end, which includes Frontend, Backends for Frontend (BFF), Caching and also service orchestration in some cases) using best engineering practices like test-driven development, SOLID principles and consideration of non-functional requirements like performance, scalability, security or cloud readiness (as applicable) at the story level
• Automates testing at unit, module and integration level as needed using tools relevant for the platform (e.g. Jasmine, Jest, Karma, Webdriver.io etc.)
• Focus on quality by implementing best practices like logging, calling out technical debt, meeting KPIs using code quality tools like SonarQube, ESLint (customize and sync with Sonar), Stylelint/Sasslint and so on.
• Hands-on with automating redundant work, like common component structure, both in terms of scaffolding as well as using the right design patterns / creating abstractions.
• Mentor junior engineers in helping review code, guiding on technical decision making
Key Requirements:
• 4-9 years’ experience
• Hands-on knowledge of HTML5, CSS3, JavaScript
• Hands-on experience working with Object Oriented JavaScript (OOJS), JavaScript - and practical uses in building complex interactive experiences, primarily with ECMAScript 2015+. You should be up-to-date with new specifications (different stages), and also, using transpilers like Babel to use features from all stages
• Good understanding of creational and structural design patterns in JavaScript
• Experience working with Single Page Applications (SPA) with universal rendering capabilities.
• Good understanding of React.js, its core principles - lifecycle methods, virtual DOM etc. and at least 6 – 12 months hands-on experience with the same
• Understanding of one-way data flow and the Flux architecture.
• Understanding of stateful (container) vs stateless (presentational) components and how to break down the application page into components
• Core understanding of how React’s state management works out of the box.
• Understanding of different CSS architectures that go hand-in-hand with React.js application development. Pros and cons of component-level CSS vs global and where to apply each
• Thorough understanding of Webpack bundler (version 2+).
• Good understanding of the Web Components standard.
• Hands-on experience with building Progressive Web Apps (PWAs) on any framework.
• Hands-on experience with Frontend Performance Optimization – especially in a React application with respect to resource loading strategy, CPU/Memory profiling on the browser.
• Hands-on experience with test-driven development using Jest or equivalent. Familiar with snapshot testing, code coverage. Experience working with utilities like Enzyme
• Experience using fluid grids, and building responsive/adaptive websites using Bootstrap etc.
• Understanding of SEO and accessibility and making it part of the development workflow
• Moderate to Strong graphics manipulation/optimization skills using Photoshop is a plus.
Deep understanding of RDBMS, Algorithms, System Architecture, Analytical Thinking, Data Warehousing
About
Our client is a platform of digital-first health clinics owned and operated under one house, with each of them working together toward one mission: To help Indians lead a more fulfilling life surrounded by wellness and grace.
The business is creating a family of purposeful health platforms with personalized solutions for a particular problem in a niche segment. Each platform provides the essentials to enable an individual segment of people to lead a graceful life full of purpose and well being.
Role
As the senior member of the frontend development team at Mosaic, you will be responsible for setting best practices and making sure that the others adhere to them. Also, you will be responsible for shaping up the entire system for scale and collaborating intensively with the backend and design teams to create the best consumer experiences.
Responsibilities
-
- Develop all user-facing products in React
-
- Build reusable components and front-end libraries for future use
-
- Translate designs and wireframes into high-quality code
-
- Optimize components for maximum performance across a vast array of web-capable
devices and browsers
-
- Focus on code maintainability and performance of the application.
-
- Provide technical advice and assist in solving programming problems.
-
- Enhance SEO, Analytics, and overall frontend architecture for better performance
Requirements
-
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
-
- Good foundation in design and a knack for designing interactions and elegant interfaces
-
- Thorough understanding of React.js and its core principles
-
- Good to have experience with popular React.js workflows (such as Flux or Redux)
-
- Experience with data structure libraries
-
- Familiarity with RESTful APIs
-
- Familiarity with modern front-end build pipelines and tools
-
- A knack for benchmarking and optimization
-
- Familiarity with code versioning tools (such as Git)
-
- Proficient in industry standard best practices such as Design Patterns, Coding Standards,
Coding modularity, Prototypes etc.
-
- Experience in using debugging tools used for profiling/optimizing performance
-
- Experience in debugging, tuning and optimizing UI components
-
- Bachelor’s degree (B.A.) in Computer Science, MIS or related degree and a minimum of
two (2) years of relevant development or engineering experience.
UI Developer :
Experience in developing Web Applications/websites using HTML5, CSS3, and Bootstrap4 or above is essential
Experience in CSS preprocessors like Less, Sass
Experience in developing Responsive and Mobile First design products/websites using wireframes & mock-ups is essential
Experience in tailwind CSS is a must (config, create custom util function)
Experience in the latest design principles and animations is essential
Experience in Photoshop / Sketch tools and collaborative products like Invision / Figma is desirable
A fair understanding of JavaScript programming / Jquery is essential
Experience in working with React
Good knowledge of web standards and SEO principles is desirable
Description:
Rapyuta Robotics is seeking talented and ambitious individuals with a can-do attitude to help revolutionize robotics. We’re creating a whole new generation of multi-agent aerial and ground-based mobile robotic platforms with access to an inexhaustible supply of data storage & processing capabilities on the cloud. Our units will be capable of working autonomously and collaboratively, learning from their collective experiences and continuously improving upon themselves.
Frontend engineers are an essential part of the engineering team, helping to make the complex functionalities of our platform accessible through intuitive interfaces. As a senior front-end engineer your responsibilities will include but are not limited to:
- Working with product owners, designers, and backend developers to implement browser-based user interfaces to orchestrate and monitor fleets of autonomous machines
- Building reusable code and libraries for future use
- Ensuring the technical feasibility of UI/UX designs and address performance bottlenecks
- Maintaining standards of automated testing, code quality, and engineering best practices
- Manage a team of 3-4 front-end developers in their tasks across the company's project requirements.
Requirements
Must-Have:
- 4+ years of work experience in front-end development.
- Advanced knowledge of JavaScript (ES6), CSS3, HTML5 and browser APIs.
- Advanced knowledge of React.js
- Good knowledge of database technologies: MySQL, PostgreSQL etc and web application security
- Experience with cross-browser compatibility issues, client-side performance considerations and automated testing tools.
- Experience with software testing, specifically unit testing & integration testing.
- Experience managing a team of front-end developers for at least 1 year.
- Experience with code quality, build and debugging tools
Good to Have:
- Basic knowledge of browser engines: Gecko, Webkit, Servo, etc.
- Knowledge in agile development, and continuous integration for the front end.
- Past experience in the robotics domain and visualizations
Benefits
- Competitive salary
- Stock options
- Budget to buy equipment of choice
- An international working environment with exceptionally talented engineers
1. At least 1+ years of product development experience with expertise in designing and implementing high-performance web applications
2. Must be proficient with JavaScript
3. Must be good in React/Redux/Middleware (Thunk, Saga)/Typescript and advance concepts
4. Should be good in Data structure and algorithms
5. Should be good in basic programming concepts
6. Should have code optimization skills and should be able to integrate REST APIs
7. should have experience in building reusable components and front-end libraries for future use
8. should have experience in translating designs and wireframes into high-quality code
9. Knowledge of Angular and Node.js is a plus
10. Should be willing to work in startup
11. Should have experience of building responsive websites










