
Job Title: Senior React.js Developer
Experience: 5+ Years
Location: Pune
Employment Type: Full-Time
Job Summary:
We are looking for a skilled React.js Developer with 5+ years of experience to join our team. You’ll build scalable, high-performance web and mobile applications, work closely with designers and backend developers, and ensure responsive and user-friendly UI/UX across platforms.
Key Responsibilities:
- Develop dynamic, reusable components using React.js, JavaScript, HTML5, and CSS3
- Integrate wireframes and UI/UX designs into functional front-end interfaces
- Ensure cross-browser/platform compatibility and responsive design
- Optimize apps for speed and scalability
- Implement and maintain unit and E2E tests (Jest, Playwright, Puppeteer)
- Integrate with RESTful APIs and backend services
- Maintain code quality and performance standards
- Collaborate with designers, product managers, and backend engineers
- Mentor junior developers and contribute to best practices
Required Skills:
- 5+ years in front-end/UI development
- Strong in React.js, JavaScript (ES6+), HTML5, CSS3
- Experience with Redux, SASS/LESS, REST APIs
- Familiarity with performance optimization tools
- Solid understanding of UI/UX design principles
- Excellent communication and team collaboration skills
- Bachelor’s degree in Computer Science or related field

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
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Job Description: Responsibilities
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- Binding of UI elements to JavaScript object models
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- Fluent knowledge of latest HTML/CSS standards and best practices
- Working knowledge of JavaScript and AngularJS
- Working knowledge of Node.js and Express
- Solid Understanding of HTTP protocol and how server-side code is processed on the client
- Some experience with Photoshop or Sketch is a plus (creating sprites, optimizing, cutting or adjusting images)
- Working knowledge of front end optimization and performance techniques
- Obsession with lean, clean and organized front-end code
- Cross-browser development and troubleshooting
- Experience building Responsive websites for web, tablet and mobile devices
- Eye for details is crucial
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Fieldproxy is a no-code workflow tool that lets anyone with a field team quickly build applications to efficiently manage their field operations. We are a VC-funded startup and are backed by some of the leading venture funds & angels in India & US.
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Roles & 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.
React.js Developer Requirements:
- 1-3 Years Previous experience working as a React.js Developer.
- In-depth knowledge of JavaScript, CSS3, HTML5, bootstrap and material design.
- Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
- Experience in Next.js, Ant design, Node.js and Python will add extra advantage but not mandatory
- 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.
experience working in React with Redux Framework
§ Experienced in responsive Frontend web application development, with a strong
analytical mind and an ethical approach to development
§ Highly proficient in CSS3, HTML5, JavaScript. Also proficient in tools like Bootstrap
and Webpack for building products across multiple screen resolutions and
browsers
§ Familiarity with cross-browser compatibility issues and demonstrate design and
user interface/user experience skills
§ Excellent time management, multi-tasking and communication skills
§ Should have experience working with RESTful APIs
§ Strong CS fundamentals: Data structures, Algorithms, Distributed systems and
Information Retrieval
§ You ship fast. Speed is in your blood. Except when you are driving in Bangalore
-Proficient understanding of web markup, including HTML5, CSS3
-Knowledge of JS based build tools like Grunt, Gulp, and Bower
-Knowledge of Unit Testing with Jest
-Exposure in SEO, Web Service integration, asynchronous request handling, partial page update etc.
-Exposure to Node.js would be an added advantage
-Knowledge of different process tools like Git, SVN, Jenkins etc.
DESIRED SKILLS:
-Strong experience in Responsive Design, React JS
-Understanding of Native and Cross Platform mobile applications and user experience best practices
-Exposure to Node.js, Angular and React Native would be an added advantage
Responsibilities
- Developing new user-facing features using ReactJS
- Building reusable components and front-end libraries for future use
- Translating designs and wireframes into high quality code
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
- Understand business requirements and translate them into technical requirements
- Building robust applications that can handle both unexpected errors and heavy load
- 3+years experience in Reactjs
- Strong proficiency in JavaScript and Typescript
- Strong Knowledge of Redux/React Context/Hooks
- Strong Knowledge of frontend end technologies such as HTML/CSS
- Experience developing with responsive applications
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Familiarity with modern front-end build pipelines and tools like Webpack or Create React App
- Familiarity with Git
What you will do
- Build some of the most crucial infrastructure using web and Android technologies for both internal and external users
- Gather feedback from users for fast iteration of products
- Take ownership of features and products
- Grasp new technologies at extremely fast pace
About You
- Solid fundamentals in computer engineering/science
- Proficient in one or both of Android and web Javascript development
- Bonus: UI/UX skills
- Clean, robust and maintainable code style
- Relentless work ethic
- Strong moral fiber
- Exceptional cognitive abilities
- Proven and verifiable track record of excellence in fields other than just academics
- Embrace responsibility and leadership through accountability
- Good English speaker, reader and writer
- Winner
If you are interested, we have a little brain teaser. Send us a message introducing yourself and we will share the brain teaser.
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