Sr. Frontend Developer

Job Description: React Developer (3–5 Years Experience)

Location: Mumbai

Employment Type: Full-time

Role: Frontend Developer (React.js)

About the Role

We are looking for a highly skilled React Developer with 3–5 years of hands-on experience in building modern, scalable, and responsive web applications. The ideal candidate should be proficient in React.js, frontend architecture, state management, and UI best practices.

Key Responsibilities

• Develop responsive, high-performance web applications using React.js, JavaScript/TypeScript.
• Build reusable components and front-end libraries for future use.
• Work closely with UI/UX designers to convert wireframes and prototypes into functional user interfaces.
• Optimize applications for maximum speed, scalability, and cross-browser compatibility.
• Integrate RESTful APIs and work collaboratively with backend teams.
• Participate in code reviews and contribute to continuous improvement of best practices.
• Troubleshoot, debug, and enhance existing applications.
• Ensure high code quality through proper testing and documentation.

Required Skills & Experience

• 3–5 years of professional experience in React.js development.
• Strong proficiency in JavaScript (ES6+) and TypeScript.
• Hands-on experience with Redux, Context API, or other state-management libraries.
• Good understanding of HTML5, CSS3, SASS, and modern UI frameworks.
• Experience working with REST APIs, JSON, and asynchronous programming.
• Familiarity with build tools like Webpack, Vite, Babel, etc.
• Understanding of Git and version control workflows.
• Knowledge of React hooks, performance optimization, and component lifecycle.
• Experience with testing frameworks (Jest, React Testing Library) is a plus.

Good to Have

• Experience with Next.js or server-side rendering.
• Knowledge of UI libraries such as Material-UI, Ant Design, or Chakra.
• Familiarity with Agile/Scrum methodologies.
• Basic exposure to DevOps tools and CI/CD pipelines.

Why Join Us?

• Opportunity to work on cutting-edge technologies.
• Collaborative, fast-paced, and growth-oriented environment.
• Competitive compensation and employee benefits.

Job Responsibilities

• Develop and maintain reusable components and front-end libraries for future use.
• Translate designs and wireframes into high-quality, responsive UI components.
• Optimize components for maximum performance across different browsers and devices.
• Implement ReactJS best practices using Hooks, HOCs, and Functional Components.
• Manage state efficiently using Redux/Flux.
• Collaborate with backend developers to integrate REST APIs.
• Debug and test applications using Mocha & Jest.
• Ensure code quality, maintainability, and scalability using modern front-end tools.

Required Skills & Qualifications

✔ 3+ years of experience in ReactJS development.

✔ Strong knowledge of JavaScript, DOM, JSX.

✔ Hands-on experience with React Hooks, HOCs, and Functional Components.

✔ Expertise in ES6+ concepts (Arrow functions, Destructuring, Spread/Rest operators, Classes, Import/Export).

✔ Experience in HTML, CSS, and responsive design.

✔ Familiarity with REST APIs and integrating backend services.

✔ Experience with state management (Redux/Flux).

✔ Strong debugging skills using Mocha & Jest for performance testing.

✔ Hands-on experience with Git, Webpack, Babel, NPM.

Good to Have:

➕ Experience with backend development (Java, Microservices).

➕ Knowledge of modern authentication mechanisms (JWT, OAuth).

About the Role

We are looking for a highly skilled and experienced Senior React Native Developer to join our team and take the lead on developing our cross-platform mobile application. You’ll play a critical role in building, launching, and scaling a high-performance mobile app that runs seamlessly on both iOS and Android platforms from a single codebase.

If you’re passionate about mobile technologies, have a strong command of React Native, and are excited about creating a high-quality product from the ground up, we’d love to hear from you.

Responsibilities

• Lead the end-to-end development of a cross-platform mobile application using React Native.
• Collaborate with product managers, designers, and backend engineers to deliver high-quality user experiences.
• Build reusable components and front-end libraries for future use.
• Optimize app performance for speed and scalability across devices and OS versions.
• Ensure the app complies with design standards and platform-specific guidelines (Apple App Store & Google Play).
• Set up CI/CD pipelines for automated builds, testing, and deployment (e.g., using Fastlane, EAS, or similar).
• Integrate RESTful APIs and third-party services.
• Handle app store submissions and updates.
• Mentor junior developers and enforce best practices in mobile development.

Requirements

Must-Have:

• 5+ years of experience in mobile application development.
• 3+ years of hands-on experience with React Native.
• Strong understanding of JavaScript (ES6+), TypeScript, and React architecture.
• Deep knowledge of iOS and Android mobile app development lifecycle.
• Experience with mobile UI/UX best practices and performance optimization.
• Familiarity with native build tools (Xcode, Android Studio).
• Experience integrating REST APIs and handling network latency issues.
• Proficient with Git, GitHub/GitLab, and agile development practices.
• Experience with push notifications, in-app purchases, deep linking, and analytics SDKs.

Preferred:

• Experience with Expo or EAS for managed workflows.
• Familiarity with mobile CI/CD pipelines (Fastlane, Bitrise, etc.).
• Experience with native modules (Objective-C/Swift and Java/Kotlin) as needed.
• Knowledge of automated testing frameworks (Jest, Detox).
• Published apps in both the App Store and Google Play.
• Prior experience in startups or high-growth environments.

What We Offer

• Opportunity to lead and build a product from the ground up.
• Work with a dynamic and talented team in a fast-paced environment.
• Flexible working hours and remote-first culture.
• Competitive salary and equity options (if applicable).
• Learning and development budget.

About Rocketlane

Rockeltane is a fast-growing SaaS startup in the customer onboarding category and has raised $21M in capital (https://twitter.com/RocketlaneHQ/status/1483821563195850753">we rapped about it!) from global VCs such as 8VC, Nexus Venture Partners, Matrix Partners India, and super angels like Gokul Rajaram and Girish Mathrubootham.

Thanks to the rapid early traction and customer love the product has garnered globally from the likes of LinkSquares, AppCues, ContractPodAI, Chargebee, parcelLab, etc., we have been recognized as a Leader in the Client Onboarding category on G2 within six months of product launch.

With a mission to deliver chaos-free, consistent, accelerated, and delightful customer journeys through its purpose-built software the company was founded in April 2020 by second-time entrepreneur trio - Srikrishnan, Vignesh, and Deepak. Previously, the trio built a successful in-app messaging startup that was acquired by Freshworks (NASDAQ: FRSH) in 2015.

Rocketlane became the https://www.producthunt.com/posts/rocketlane"> #1 Product of the Day on Product Hunt on the day we launched it. We are now building a global and diverse workplace that will empower passionate problem-solvers to innovate, collaborate, do their best work, and see the next phase of hyper-growth together! 

What’s the opportunity?

Are you a front-end developer looking to fast-track your learning and growth? Have you looked at world class products like Asana, Notion, or Airtable, and felt “I wish I were part of the early team that built these products”?

At Rocketlane, we’re a team that has previously built and rolled out globally successful SaaS products used by tens of thousands of customers. We’re laser focused on delivering a world class new product again, and looking for an ambitious front-end engineer to join our existing team of 9 engineers.

If it excites you to think of a fast paced start-up environment, building something big from scratch, breaking down new problems, creating well structured UI components, executing on pixel perfect design, paying great attention to every little interaction detail, and doing demos of your work every Friday with a happy and passionate team, then this is the right opportunity for you.

Some of the tech problems you get to work-on as a front-end developer would include building real-time collaboration experiences across our product, building live document editing and modern spreadsheet experiences from scratch, creating flexible new Kanban-style views of work tasks, and crafting cool new UI components and interactions that we will use across our product.

About you:

• Knowledge in the following areas
• React
• SPA Framework patterns
• Hands-on experience in HTML, CSS, SASS & Object Oriented Javascript
• Worked with features provided by browsers (Caching / Storage / Compatibility etc )
  
  

Nice to have:

• Familiarity with AWS
• Experience with startups or early stage teams
• Knowledge of module bundlers like Webpack 

What’s in it for me?

• Great opportunity: Rocketlane genuinely cares about everyone we hire. You’ll learn new things and grow no matter how experienced you are; you will be working with founders who have more than three decades of collective experience in building significant B2B SaaS startups. 
• Great team: Work with a world-class, high-velocity team that truly embodies the values of empathy, curiosity, and customer-centricity. Check out thehttps://www.linkedin.com/feed/hashtag/?keywords=rocketlane_meet_the_team"> MTT(Meet The Team) videos on our LinkedIn. 
• Great culture: An open, fun, and exciting startup culture that empowers its people to champion big problems with the freedom to think and innovate.
• Growth:  You could easily and quickly transition into other roles you might like.
• Impact: You get to be part of a global, passionate team in a fast-paced and growth-oriented environment. The team has a work philosophy of being high on ambition, ownership, and a bias for action.
• Monetary rewards and benefits: Competitive salary, flexible leave policy, and more! 

• Develop User interfaces for Modern Rich Internet Applications with the latest Front End Technologies
• Perform product analysis and development tasks of an increasingly complex nature which may require extensive research and analysis.
• Writing tested and documented JavaScript, HTML and CSS
• Make design and technical decisions for AngularJS projects.
• Develop application code and unit test in the AngularJS, Rest Web Services and Java technologies for the Application Development Center. 
• Ensuring high performance

• Strong expertise with HTML, CSS, and writicross-browser-compatibleble code.
• Good understanding of AJAX and JavaScript Dom manipulation Techniques
• Experience with RESTful services
• Experience in JavaScript build tools like grunt or gulp
• Expert in any one of the modern JavaScript MV-VM/MVC frameworks (AngularJS, JQuery, NodeJS, GruntJS)
• Familiar with testing frameworks (Ex. Jasmine)
• Test runner framework (Ex. Karma)
• Hand on and implements complex AngularJS applications, directives, controllers, services
• Critical thinker and problem-solving skills
• Team player
• Good time-management skills
• Great interpersonal and communication skills

About the company:

NowPurchase is transforming the 140B$ Metal Manufacturing industry. The metal industry forms the backbone of the economy and the fundamental block of the physical world - be it transportation, construction and every machinery. NowPurchase is building a rich, digital marketplace where Metal Manufacturers can procure high quality raw materials in a trusted manner. At the same time we are building the OS (Operating System) that will supercharge their productivity and processes to ultimately make procurement autonomous. Now Purchase raises USD 2.4 million in Nov 2021, led by Orios Venture Partners, InfoEdge Ventures.

About you: 

We are looking to add an immensely talented Senior Front End Engineer that will help us invent, design, refine and deliver products that will meet our vision. Expect to build a lot of web interfaces and dashboards both for the browser as well as native IoT enabled terminals that will be placed at the manufacturers' premises. You need to lead the front end team to make sure they are delivering high quality code and are constantly inspired to experiment with tools to push out MVPs.

Roles & Responsibilities:

• You are empowered to work directly with leadership and the product team to make decisions about your code and future of the product.
• Deliver high quality modular code deployed over web, mobile and native IoT enabled terminals that leverage REST-based services and real time sockets.. This would include visual dashboards and real time optimizations that are critical for the manufacturing process.
• Have a strong emphasis on shipping features quickly without sacrificing code quality. Be ready to build a lot of MVPs that will go through iteration or be completely scrapped depending on the outcome at the customer end.
• Own your Agile projects and lead the team from software design to implementation and deployment. Maintain sprints, delivery timelines and contribute to better managing the engineering team.
• Transform UI designs and mockups into pages and flows using CSS3 and JavaScript frameworks. Be ready to do the mockups yourself sometimes.
• Build a culture of simplicity and pragmatism, which is reflected in your elegant code that other developers emulate and you ensure through thorough code reviews and processes.
• Have an exceptional understanding of asynchronous request handling, partial page updates, and service workers and command over the internals of JavaScript, React and Redux.
• Continuously evaluate existing engineering processes and recommend improvements.

Required Skills and qualification:

• 4+ years’ experience developing rich UI/Front-end for user-facing web applications.
• Strong experience with React or similar frameworks, TypeScript, SSR (Server Side Rendering), SPA (Single Page Application), PWA (Progressive Web application), OOP (Object Oriented Programming), Reactive programming, and Unit tests.
• Demonstrated ability to function as a project leader as well as an individual contributor.
• Excellent communication and facilitation skills.

Tech Stack skills required:

• React/Redux
• Python/Django/Celery
• Git, AWS, ELB (Elastic Beanstalk), Netlify
• PostgreSQL/Redis/S3

Location: 

On- site: Kolkata, West Bengal

Compensation & Benefits:

• Cash Compensation: As per industry standards & pedigree of candidate
• ESOPs: 10% of NowPurchase is dedicated to current & future team members. Your package would entail some ESOPs so that you own a part of the company and grow along with it.
• Medical Insurance: Benefits of group insurance of 3 lakhs for family including parents, spouse, children
• Generous leave structure and WFHs including Marriage, Maternity & Paternity leaves
• Complete Relocation Expenses: We are building a unicorn out of the city of Joy (Kolkata). We will pay for everything you spend to relocate here.

Company Link: https://nowpurchase.com">https://nowpurchase.com

LinkedIn: https://www.linkedin.com/company/nowpurchase/">https://www.linkedin.com/company/nowpurchase/

• Need to work on designing, developing, and testing UI for the platform
• Need to work with design teams to build new features to solve business problems and fill business needs
• Convert Design to Code using latest web technologies
• Integrate User Interface with Back-End APIs
• Optimize application for maximum speed and scalability
• Self-motivated, self-learning and thinking up and executing own ideas

• Strong knowledge of React.js, HTML, CSS & Javascript 
•  Knowledge in node.js, AWS, is an advantage
• Ability to work independently and manage the entire frontend of all platforms associated with Rejolut
• Exemplary tasks – Explore something new every day!
• Responsibility – Bring in your own ideas and get supported in executing them. 
• Fun – Experience a family culture & celebrate with the founders & team.
• Team – Be a part of a high-performance & cultural diverse team

• Freshers can apply
• Students in their last semester or passed out in 2020 can also apply

• Working days: Monday to Friday
• Timings: 11:00 am to 7:00 pm
• Duration of internship: 6 months/PPO(Performance Basis)

• You are available for the above said duration.
• You prefer to work in a fast paced environment with growth & learning opportunities
• If you have not applied for an internship before with us.
•  have relevant skills and interests

•  Health Insurance
•  Work from Home
•  Fast growth and more visibility into the company
•  Experience to work on the latest technology
•  Competitive Learning Environment with supportive co-workers
•  Employee friendly HR Policies
•  Paid leaves up to certain limits
•  Liberal working atmosphere
• Get mentored by the best in the industry

We're looking for a React Developer to join our growing frontend team.

As a React Developer, you will help develop the next generation of our apps using tools such as React.js, Redux, Saga, Thunk and Webpack. You should be familiar with React and its ecosystem. Past experience with a React codebase is a requirement.

We're looking for someone who is comfortable with a fast-moving environment and can learn quickly.

• Develop new components and features for our frontend app(s)
• Write, audit, and improve our test coverage
• Document and refactor our frontend codebase
• Profile and improve our frontend performance
• Write about your work and contribute back to open source

While these requirements are a guideline, feel free to apply even if you don't meet some of these.

• 3+ years’ experience working with a Javascript framework, preferably React
• In-depth understanding of Javascript, the DOM, and relevant concepts
• In-depth understanding of Redux/React Hooks/Saga/Thunk
• Proficiency with browser based debugging and performance testing
• Understanding of progressive web apps
• Experience with a testing framework (Jest/Mocha)
• Experience using Git
• Excellent communication skills, both written and verbal

Frontend Developer.

Experience: 3 - 5 years

Skills: React , UI Development, JavaScript,  HTML5, CSS , J Query, JSON, Bootstrap, Typescript, 

Optional:  jasmine, karma

• Responsible to develop web applications using React.
• Write and maintain the front-end code of web applications & To work in UI development.
• Experience in Responsive / Material UI Development.

• Able to interact with the team and understand functional requirements and create design documents for new features.
• Exposure to bug fixing, maintenance, continuous integration releases.
• Participate in sprint planning and story elaboration sessions.
• Candidate should be able to work independently in an Agile project.
• Experience with Test-Driven Development, Integration testing and Agile processes.