
· 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.
Roles and Responsibilities :
- To analyze business requirements, prepare design and implementation recommendations and estimate development effort
- Collaborate with cross-functional teams to define, design, and ship new features
- Lead or participate in design reviews, code reviews and architecture evolution discussions
- Unit-test code for robustness, including edge cases, usability, and general reliability
- Work on bug fixing and improving application performance
- Continuously discover, evaluate, and implement new technologies to maximize development efficiency
Skills Required :
- Experienced with front end programming language with React JS.
- 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).
- Knowledge of modern authorization mechanisms, such as JSON Web Token.
- Familiarity with modern front-end build pipelines and tools.
- Familiarity with code versioning tools (such as Git, SVN, ).
- Candidates with Good communication Skills.
Responsibilities:
- Develop high-quality, reusable, and efficient frontend components using React.js.
- Collaborate closely with UI/UX designers and backend developers to translate design concepts into functional interfaces.
- Participate in architectural discussions and contribute to the overall frontend design and development strategy.
- Optimize applications for maximum speed and scalability, ensuring exceptional performance across various devices and browsers.
- Identify and address performance bottlenecks, troubleshooting and debugging frontend-related issues as they arise.
- Stay current with industry trends, best practices, and emerging technologies, and recommend their incorporation into projects when applicable.
- Mentor and provide guidance to junior developers, fostering a culture of continuous learning and skill development.
- Collaborate with the QA team to ensure the delivery of high-quality software through rigorous testing and code reviews.
- Contribute to the documentation of frontend architecture, coding standards, and best practices.
Qualifications:
- Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience).
- Minimum of 3 years of professional experience as a React Developer.
- Strong proficiency in React.js and its core principles, with a solid understanding of state management (e.g., Redux) and component lifecycle.
- Proficiency in JavaScript, HTML5, and CSS3, Bootstrap, JQuery with an eye for design and user experience.
- Knowledge of version control systems, particularly Git.
- Ability to write clean, maintainable, and well-documented code.
- Strong problem-solving skills and the ability to work effectively in a collaborative team environment.
- Excellent communication and interpersonal skills.
Responsibilities
- Proficient knowledge of a NodeJS and Express.
- Understanding differences between multiple delivery platforms (such as mobile vs, desktop), and optimizing output to match the specific platform
- Good understanding of server-side templating languages (such as Jade, EJS, Jinja, etc. depending on your technology stack)
- Good understanding of server-side CSS preprocessors (such as Stylus, Less, Sass etc. depending on your technology stack)
- Creating database schemas that represent and support business processes
- Data migration, transformation, and scripting
- User authentication and authorization between multiple systems, servers, and environments
- Integration of multiple data sources and databases into one system
- Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform
- Creating database schemas that represent and support business processes
- Implementing automated testing platforms and unit tests
- Management of hosting environment, including database administration and scaling an application to support load changes
- Understanding of fundamental design principles behind a scalable application
- Good understanding of advanced JavaScript libraries and frameworks such as AngularJS.
Technical Skills
- VueJS
- Express
- Socket.IO
- NuxtJS
- MongoDB (3.x)
- Mongoose
Skills
- Have published at least one original React JS Application.
- Experience with third-party libraries and APIs
- Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
Roles
Should be able to single-handedly build performant mobile apps on the React JS platform. You will be responsible for architecting and building these applications, as well as coordinating with the teams responsible for other layers of the product infrastructure. Building a product is a highly collaborative effort, and as such, a strong team player with a commitment to perfection is required.
Responsibilities
- Build pixel-perfect, buttery smooth UIs across web platforms.
- Leverage APIs for deep integrations with web platforms.
- Diagnose and fix bugs and performance bottlenecks for performance that feels native.
- Writing application interface codes using JavaScript following react.js workflows.
- Maintain code and write automated tests to ensure the product is of the highest quality.
- Developing and implementing front-end architecture to support user interface concepts.
- Monitoring and improving front-end performance.
Role Description:
We are looking for a Lead Frontend Engineer ( Preferably React Js) who will be architecting and developing cutting-edge features for Radiusagent web applications . An ideal candidate will have prior experience in eCommerce Products and worked closely with Product, Design, and other cross-functional partners.
Responsible for-
- You will be constantly and consistently implementing new features and optimize existing ones from controller-level to UI- Vigilantly and rapidly fix bugs.
- You will continuously solve problems to give our customers a delightful experience.
- You will be working closely with Product manager and back-end engineers to implement front-end solutions.
- You will be endorsing upcoming standards, launching, iterating, and making a difference.
- You will have to be extremely detail-oriented to strive for pixel-perfect implementation in all browsers.
- You should have the ability to write well-abstracted, reusable, highly performant code for UI components.
- You should have the passion for performance debugging and benchmarking.
Requirement-
- 5+ years of experience in building scalable commercial web applications.
- A passion to provide a good user experience
- Deep expertise in Javascript and work experience in using one of the frameworks available (React JS, Angular, Node JS, EmberJS, etc).
- If you are passionate about implementing elegant User Interfaces using HTML and CSS.
- Ability to work autonomously and to be able to work cross-functionally with multiple stakeholders.
- Excellent communication skills, good visual design sense, in-depth experience in developing web-based applications.
Must Have
Degree in Computer Science or related field.
3 - 4 years’ experience in Angular or React.
Expertise in responsive and adaptive front end design and development. Proficiency in HTML, CSS, JavaScript, and jQuery.
Experience is RESTful web services.
Understanding of key design principles.
Experience in version control using Git, CI-CD principles.
Good problem-solving skills.
Excellent verbal communication skills.
Good interpersonal skills.
Nice to have
Experience with graphic design applications such as Adobe Illustrator. Understanding of SEO principles.
Knowledge of Cloud technologies like AWS or Azure.
- Delivering a complete Front-end application
- Ensuring high performance on mobile and desktop
- Writing tested, idiomatic, and documented JavaScript, HTML and CSS
- Coordinating the workflow between the graphic designer, the HTML coder, and yourself
- Cooperating with the back-end developer in the process of building the web service/ application
- Communicating with external web services
Technical/Functional Skills:
- 3 to 5 yrs of experience working as an Angular Developer
- Experience in Angular 7,8,9 versions are mandated.
- Proficiency in CSS, HTML, javascript
- Experience on Multi-Language is preferable
- Knowledge on Arabic design is a plus
- Experience on Components based Architecture
- Experience on CSS Grids and Flex Layout mandatory
- Well versed with coding standards
- Be able to provide effort estimations based on the customer requirements
- Experience of implementing enterprise level Angular applications and the related Architecture
- Implementation knowledge on Agile, working experience on Continuous Integration (CI) process is required
- Experience of integration with SAP is highly desirable
- Working knowledge with databases ORACLE, SQL Server, mySQL
- Be hands-on technical and should work as either individual contributor or team member
- Must have knowledge in code version mechanism using tools like TeamCity, GitHub
- Knowledge on Agile scrum and waterfall methodology
- Optimizing performance of code and reviewing code of junior developers
- Work closely with the architecture team and provide architecture inputs
- Experience with understanding of mobile related frameworks like Cordova is a plus
- Comfortable dealing with APIs and utilizing oDATA/REST / JSON interfaces
- End-to-End experience - Discovery to Deployment of Angular applications Soft Skills Required
- Good communication and interpersonal skills
- Candidates should be independent thinkers, thought leaders, good presentation and communication skills and great at solving problems
- Strong experience in building new features into one of the most advanced interfaces on the web
- Take a lead role with other engineers and designers to deliver strong customer-focused experiences
- Keep our product up to date with the latest frontend technologies such as React
- Practice disciplined software engineering (e.g. automated testing, code reviews, and writing beautiful, pragmatic code)
- Actively contribute to team and company standards
- Strong JavaScript development skills, understanding of new concepts, and proficiency in React, Angular, or other modern JS frameworks
- Extensive experience developing large-scale application software
- Have full knowledge of new HTML5 constructs, and CSS3
- Have experience with Single Page Application development
- Keep up to date with the newest technologies
- Develop features and create fulfilling user experiences
- A strong understanding of, and practical experience with, web application development
- A sincere commitment to crafting readable and reliable code
- 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.
- 2 Years of 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, Webpack, 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.
- Proficient understanding of code versioning tools, such as Git
- In this role, you will Design, Develop and Deploy applications based on HTML, ReactJS, JS as front-end. You are a creative and technically skilled individual responsible for bringing great user experience and design to life. You create reusable, extensible, flexible, high-performing web applications from front end to back end.
- Execute in an agile environment using industry standard tools and delivering weekly code releases Develop and test for cross browser, cross platform applications.
- Experience in product designing, distributed architecture.
- Have a demonstrated track record of End to End product engineering responsibility








