
· 7+ years of professional experience in front-end development.
· 7+ years of hands-on experience with React.js and its ecosystem (Redux, Context API, Hooks, etc.).
· Strong understanding of JavaScript (ES6+), HTML5, and CSS3.
· Experience with RESTful APIs, GraphQL, and WebSocket integration.
· Proficiency in modern build tools (Webpack, Vite, Babel, etc.).
· Expertise in state management libraries (Redux, MobX) and React Query.
· Solid understanding of UI/UX principles and responsive design.
· Experience with testing frameworks (Jest, React Testing Library, Cypress, etc.).
· Familiarity with modern CI/CD pipelines and version control tools (Git).

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.
Connect with the team
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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.
1. Developing new user-facing features using React.js
2. Ability to understand business requirements and translate them into technical requirements
3. Optimizing components for maximum performance across a vast array of web-capable devices and browsers
4. Build reusable code and libraries for future use
5. Work with backend engineers to build features and ship experiments
Skills Required :
1. Strong proficiency in JavaScript, ReactJS, Redux, redux-saga and ES6.
2. Konwledge with common front-end development tools such as Babel, Webpack, NPM, etc.
3. Familiarity with code versioning tools such as Git
4. Familiarity with RESTful APIs and Express js.
5. Ability to work in a fast-paced and deadline-oriented environment.
- Developing new user-facing features using React.js
- 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
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Thorough understanding of React.js and its core principles
- Experience with popular React.js workflows (Redux)
- Familiarity with newer specifications of ECMAScript
- Experience with data structure libraries (e.g., Immutable.js)
- Knowledge of isomorphic React is a plus
- Familiarity with RESTful APIs
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Familiarity with modern front-end build pipelines and tools
- Ability to understand business requirements and translate them into technical requirements
- A knack for benchmarking and optimization
- Familiarity with code versioning tools (such as Git, SVN, and Mercurial)
- Excellent Communication Skills.
- Working knowledge of React libraries such as Redux, Redux Thunk, Redux Saga, Redux Forms, Immutable etc.
- Highly proficient in JavaScript and ReactJs
- Good understanding of design libraries such as Material, Ant and Semantics etc.
- Basic understanding of front-end technologies, such as HTML5, and CSS3.
- Sound knowledge of Testing frameworks such as Jest, Enzyme, Mocha, Protector etc.
- Experience of writing unit, integration and E2E tests.
- Experience of integrating third party APIs.
- Good understanding of code versioning tools, such as Git.
Responsibilities:
-
Works as part of a team to continually refresh and enhance our users’ web experiences using an Agile Development Methodology.
-
Build and ship features with an understanding of Javascript, CSS and HTML best practices.
-
Coordinate with back-end engineers to provide a cohesive experience.
Must-Have:
-
2+ years of extensive exposure in developing web applications using the latest front-end technologies
-
Expertise in the following area:
-
HTML5, CSS3, JavaScript and JS frameworks, such as jQuery,
-
Responsive & Adaptive web design
-
CSS frameworks like SASS/LESS
-
Able to work both independently and in a team environment.
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Adequate knowledge of Version Control Systems like Git
Mandatory Skills to have:
-
Drupal Must-Have:
-
Prior hands-on experience with Drupal Projects.
DUKAAN - Create Your Online Store in 30 Seconds
Dukaan is an app that allows offline businesses to sell their products and services online. On our app, the users can make beautiful product catalogs (catalogs) right from a smartphone and share with their customers easily on different social media apps such as Whatsapp Business, Whatsapp, Facebook, Instagram, etc. Praised by users all over India, this app has saved declining businesses by helping them transfer their shop online. The journey has just begun and we are on a mission to make India truly Digital.
Dukaan is currently powering over 5 M e-commerce stores built by Indian small businesses and growing at a crazy rate.
We are looking for Frontend developers to join our team.
DESCRIPTION
We are looking for a great Frontend developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality products are important.
RESPONSIBILITIES
- Developing new user-facing features using React.js
- 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
REQUIREMENTS
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Thorough understanding of React.js and its core principles
- Experience with popular React.js workflows (such as Flux or Redux)
- Familiarity with newer specifications of EcmaScript
- Familiarity with RESTful APIs and sockets
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Familiarity with modern front-end build pipelines and tools
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
- Ability to understand business requirements and translate them into technical requirements
- A knack for benchmarking and optimization
- Familiarity with code versioning tools
- Experience with PWAs and React Native is a huge plus
Roles and Responsibilities
- Design and implement components of our web application, and admin panel
- Build a robust, lightweight, and high-performance client-side app
- Translating designs and wireframes into high quality code
- Write documentation and guides for web app & admin panel
Key Qualifications
- Expertise in ReactJS/Redux
- Working knowledge of TypeScript or Flow is a plus
- PURE experience of 1.5 Years and more in Frontend Development
- Expert-level knowledge of developing, shipping, and maintaining Javascript applications
- Knowledge of general software design patterns
- Deep understanding of Javascript
- Up-to-date on the latest build tools, and libraries such as ES6, Webpack, Babel
- Proficient in Javascript with strong object-oriented design skills
- Able to work independently and drive results
This is a temporary full time role.
Responsibilities
- Developing the latest user-facing features using React.js
- Designing a modern highly responsive web-based user interface
- Building reusable components and front-end libraries for future use
- Translating designs and wireframes into high-quality code
- Learn and understand user interactions
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
- As a React.js Developer, you will be involved from conception to completion with projects that are technologically sound and aesthetically impressive.
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Thorough understanding of React.js and its core principles
- Prior experience with popular React.js workflows (such as Flux or Redux)
- Familiarity with more current specifications of EcmaScript
- Familiarity with RESTful APIs
- Familiarity with HTML / CSS
- GIT experience is a plus
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Familiarity with modern front-end build pipelines and tools
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
- Ability to understand business requirements and translate them into technical requirements
- Familiarity with code versioning tools









