
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.

About Tradelab Software Private Limited
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Responsibilities:
- Review, Evaluate, and Validate technical requirements.
- Work and lead other team members to translate the requirements into final deliverables.
- Understand Storyboards and Visual mock-ups.
- Understand and utilize the latest tools, technologies, and trends in Web development.
- Ensure the deliverables meet Primathon standards, and guidelines.
- Developing your frontend capability in complex problems and expanding your horizon of technologies.
- Responsible for designing, coding and modifying web pages that are focused on content within the standards, guidelines and requirements of clients.
- Work with clients, and other team members as appropriate.
- Understand and utilise the tools and technologies being used.
- Work with CTO to keep on track with the project plan.
- Come up with efficient, modular and scalable solutions for business and technical problems.
Requirements:
- Experience with Frontend technologies (React.js ).
- Proficient understanding of web markups, including HTML, CSS-3
- Proficient with modern JavaScript (ES6+: classes, modules, arrow function, destructuring etc).
Qualification:
BE/ B.Tech/ M.Tech in Electronics/ Computer Science / MCA
Job Description
We are looking for a Front-End Web Developer who is motivated to combine the art of design with the art of programming. Responsibilities will include translation of the UI/UX design wireframes to actual code that will produce visual elements of the application. You will work with the UI/UX designer and bridge the gap between graphical design and technical implementation, taking an active role on both sides and defining how the application looks as well as how it works.
Responsibilities
- 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
- 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.
- Bachelor’s degree in computer science, information technology, or a similar field.
- Minimum 2 years experience working as a react.js developer.
- In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
- Knowledge of REACT tools including React.js, Web pack, Enzyme, Redux, and Flux.
- Experience with user interface design.
- Knowledge of performance testing frameworks including Mocha and Jest.
- Experience with browser-based debugging and performance testing software.
- Excellent troubleshooting skills.
- Good project management skills.
About Haber
At HABER, we are solving the challenges of tomorrow, today. We are bringing together the best minds in process, engineering, computing and chemistry to develop solutions to address some of the world’s toughest challenges – water and energy scarcity and sustainability. Over the past few years there has been an explosion in unstructured data across industry driven by affordable sensing technologies and adoption of analytical instrumentation. This sudden increase in data has resulted in industries spending significant amounts of time collecting, organizing and analysing content and very little time driving value with the data. HABER is focused on reversing this trend by helping our customers spend less time collecting and analysing data and more time using HABER’s platform to drive efficiency, identify issues before they happen and uncover hidden potential. Follow us on Twitter @haber_tech or LinkedIn at linkedin.com/company/haber-technologies or visit us at haberwater.com/careers
- 8+ years of experience with one of the top frontend frameworks - React (preferred) and with App development (recommended)
- Demonstrated experience in managing successful engineering teams across both web and app development
- Solid understanding of modern CSS methodologies like SCSS, SASS
- Exposure to latest developments in UI development like PWA, Single Page Apps, Hybrid Apps, Responsive web design etc
- Deep understanding of Javascript topics including the V8 Engine, Async, Memory
- Management, Duplex Communication.
- Understanding of app development practices
- Prior startup experience is a plus
- Languages: Javascript, Typescript, CSS
- Framework: React 17, knowledge of React hooks is important and knowledge about react context and redux is required too
- Packages manager: npm, yarn
- Knowledge of REST and GraphQL
- Control version: Git
- Hosting & deployment: AWS Amplify
- The automation UI was written in Vue therefore knowing about Vue may be a plus
How many hours are they expected to work?
- - Full time position ( 40+ hours a week)
What hours should they work?
- - Prefer 9-5 EST but there is wiggle room
Will there be nights and weekends?
- - Nights and weekends are not scheduled, however we are looking for someone that takes pride in their work and will lean in to hit a deadline or to fix a bug if it has a significant impact on the platform.
Should they be expected to lead?
- - Yes, you should be expected to lead and to communicate/ cooperate with other devs as a team. Some coding might be alone but the hope of the app is that it all works seamlessly together and to ensure that there needs to be communication among all devs front end and back end.
Who will they report to?
- - They will report to Product OwnerRob and Product ManagerJulietta daily for standups and well as pushing tasks through the appropriate structure of review, QA, and production.
- They will also report and check in with Client SuccessCourtney as we look to make the app have a seamless customer experience and customer value. The goal of Attribute should be to try and give as much value as quickly and easily as possible.
Will they work alone or in a team?
- In some spots they might be expected to work alone and on a separate sprint from others, however, everything needs to tie in and work together, because of that the developer must be team oriented in both development and problem solving.
- Additionally, there will be times that they should expect to work with people who are not particularly tech savvy ( ie. sales, marketing, customer success etc.) to collaborate on a specific feature to produce the best thing for the product.
Accountability
- The developer is both accountable for their code and the code of the team. They should take care and responsibility in the work that is done and if there are problems with the code in QA or production work as diligently as possible to fix that problem ( whether it is their code directly or not).
- As part of this all code will be attached from Github to Jira for developers to constantly upload their commits to Jira tasks
- A mistake is completely fine and expected, bugs are to be expected. What is asked is that you report it as soon as possible and are honest about it so that we can move forward in resolving it as soon as possible.
Customer, Usability, and Value Focused
- The end user of our product will be marketing professionals/head of marketing. At all times the developers need to take this into account and spend time thinking of the ease and the use cases that people will utilize their code or features in real life versus what is a way to make something work but in a vacuum.
Quality focused
- Pushing out code is awesome, but if the code has a ton of bugs and does not do the required action that is practical for the user then it does not matter. We want a developer who is Quality focused and also hold their other developers accountable.
Focused on the whole
- When producing a feature it is easy to sometime get sucked into how that features works in a vacuum. The developers need to be able to work together and understand the software architecture as a whole in order to make whatever feature they are working on be able to work with the other features that are built within the app ( and will be built or are on the roadmap for the future).
Creativity and Experimentation
- Developers are expected to work within structures, however, they are always encouraged to take time to think of creative solutions and to collaborate on new features or ways of making the product better.
Unfeathered, Honest, Respectful Communication
- Every developer should feel free to speak their mind in a respectful manner to other developers as well as anyone else in the entirety of the company. Any opinion, thought, or perspective will be listened to and valued.
Next Man or Woman Up Mentality
- Never should anyone on the team defer a problem and say “ thats not my fault or problem”. We are one unit and one company. One problem is everyone's problem and should lean in to the “next man up philosophy” if you have the time and can help to fix the problem and bring it to a solution you should be willing to.
Upward Mobility and Vesting Opportunity
- This position will allow for upward mobility, increased responsibility, and for people who constantly go above and beyond an opportunity to vest into and own equity in the company
Preferred Experience:
- 2-3 years of industry experience in software development.
- Experience working with medical data
- Experience and familiarity working in development teams and team-based development practices including scrum/agile, code review, etc.
- Knowledge and experience working with NoSQL databases such as MongoDB, CouchDB, Raven DB, etc.
- Knowledge of RDBMS concepts and experience with Microsoft SQL Server, MySQL, etc.
- Knowledge and experience working with Node.js and related frameworks such as Express.js.
- Knowledge and experience working with web application frameworks such as Angular, AngularJS, or React and related frameworks such as Ionic.
- Familiarity with FHIR APIs and experience working with REST APIs.
- Experience working on full-stack projects.
- Familiarity with CI/CD pipelines
-
Desired skills:
- Bachelor’s degree or equivalent combination of education and experience in Computer Science.
- Ability to establish priorities, goals/objectives and timelines.
- Possess strong planning and time management skills.
- Demonstrated ability to delegate and oversee assignments to ensure successful and timely completion as well as to obtain the cooperation of others within and outside the unit. Works in a collaborative manner to achieve results.
- Ability to effectively present technical topics to internal groups with potentially varied levels of technical sophistication. Strong communicator with excellent ability to work in a team environment.
React Native / React JS Developer
We're looking for a React Native 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, Enzyme, and Webpack. You should be familiar with React and its ecosystem.
Responsibilities
- Actively aid the consulting team in different phases of the project including problem definition, effort estimation, diagnosis, solution generation, design develop and deployment.,
- Contribute to unit-level and organizational initiatives.,
- Adherence to the organizational guidelines and processes
- Design, build and maintain efficient, reusable, and reliable codes by setting expectations and features priorities throughout the development life cycle
Requirement
- 2+ years' experience working with a Javascript framework, React Native, ReactJS, Typescript, Node JS
- In-depth understanding of Javascript, the DOM, and relevant concepts
- Must have experience in Web services, Web API, REST services, HTML, CSS3
- Proficiency with browser-based debugging and performance testing
- Identify bottlenecks and bugs, and recommend system solutions by comparing advantages and disadvantages of custom development.
- Contributing to team meetings, troubleshooting development, and production problems across multiple environments and operating platforms.
- Responsible for development of new highly-responsive, web-based user interface
- Construct visualizations that are able to depict vast amounts of data
- Work and collaborate with the rest of the engineering team
- Work with product team and graphic designers
- Learn and understand user interactions
- Develop a flexible and well-structured front-end architecture, along with the APIs to support it
- You will be part of a growing high functional team, responsible for delivering various frontend products to the end-users. Simplifying complex workflow and make it easy for the end-users.
- The team designs and develops various products from - financial apps targeted to invoice users, data-heavy app oriented to operational and support teams, a productivity app for sales teams,
- SDK that will be integrated into third-party apps, etc.
- You will work with business, product, and backend teams to work on new features and products.
- You are expected to drive the products to maximize its business impact and customer delight.
- You are expected to stay on top of tech innovations in the Web development space, experiment them and make suitable suggestions to enhance tech stack. Research and propose software programs that are compatible with future technologies.
- Design and implement Single Page Applications (SPAs) using modern JavaScript frameworks
- Integrating data from various back-end services
- Develop a simple-to-use user interface for a complex product, apply new technologies, best design practices and usability patterns
- Contribute to end-to-end system architecture, working with/as cross-functional teams
- Collaborate with UX teams, product managers and other technical teams to create optimized and delightful user experiences
- Apply expertise of HTML5, bootstrap/foundation CSS frameworks
- Analyze the performance of layers in the frontend, backend and engineer designs/code to solve them
- Work with the product team to build flow and detail out the requirements
- Conversant with development for desktop and mobile browsers and hybrid apps.
Requirement
You are required to be comfortable in the following aspects:
- Proven working experience in web programming
- Top-notch programming skills and in-depth knowledge of modern HTML/CSS
- Solid understanding of how web applications work including security, session management, and best development practices
- Working with respectable size Single Page Application (SPA) project
- Expert in MVC like design patterns, modern JavaScript frameworks
- Hands-on experience with network diagnostics, network analytics tools
- Solid CS, OOP/OOD, design patterns
- Good grasp on usability and interaction design
- Track record in large-scale system software development
- Aggressive problem diagnosis and creative problem-solving skills
- Ability to work and thrive in a fast-paced environment, learn rapidly and master diverse web technologies and techniques
Skills
- Any framework - ReactJS, AngularJS, Backbone, Ember, VueJS
- DOM and Virtual DOM understanding
- API Integration. Understanding of session management.
- Experience with server-side processing such as templating, packaging and delivery
- Some end-to-end system design experience, sensitive to security
- Experience working with webviews on Android and iOS
- Exposure to React Native
- Demonstrated visual design and layout skills
- Design and development of backend REST endpoint applications








