ReactJS Developer

Job Summary:

We are looking for a talented and passionate Front-End Developer with 2–3 years of experience to join our growing team. You’ll be responsible for translating UI/UX design wireframes into responsive, high-quality code and delivering seamless user experiences across web platforms.

Key Responsibilities:

• Develop and maintain responsive web applications using HTML, CSS, and JavaScript (ES6+)
• Work with modern frameworks/libraries like React.js, Vue.js, or Angular
• Collaborate with designers and backend developers to integrate APIs and improve UX
• Optimize applications for speed and scalability
• Ensure cross-browser compatibility and mobile responsiveness
• Participate in code reviews, testing, and documentation

Requirements:

• 2–3 years of proven front-end development experience
• Strong proficiency in JavaScript, HTML5, and CSS3
• Experience with TypeScript, Tailwind CSS, or Next.js
• Experience with at least one modern JavaScript framework (React preferred)
• Familiarity with version control systems like Git
• Good understanding of RESTful APIs and asynchronous programming
• Strong problem-solving skills and attention to detail

Nice to Have:

• Familiarity with CI/CD pipelines and testing frameworks
• Basic knowledge of design tools like Figma or Adobe XD

Why Join Us?

• Dynamic and collaborative team culture
• Opportunity to work on impactful, real-world projects
• Flexible work environment and continuous learning support

Job Type: Full-time

Work Location: In person

Job Description: 

Why are we here?

We are looking for a Fullstack Developer who is motivated to combine the art of design with the art of programming. Responsibilities will include implementing visual elements and their behaviors with user interactions. You will work with both front-end and back-end web developers to build all client-side logic. You will also be bridging the gap between the visual elements and the server-side infrastructure, taking an active role on both sides, and defining how the application looks and functions. You will be boarded into the team that manages higher secondary school projects on the Salesforce stack. You will be given an opportunity to learn the entire ecosystem of salesforce.

Mandatory skills to have/ Responsibilities:

● Overall 4+ years of experience and a strong understanding of JavaScript, its quirks, and workarounds. 

● Good understanding of web markup, including HTML5 and CSS3. 

● Strong hands-on experience with advanced JavaScript libraries and frameworks such as AngularJS or Angular 2+ etc.

● Understanding of Software Design Patterns. 

● Good understanding of AJAX, REST APIs, Remote functions, and prior development experience in building the same. 

● Proficient understanding of cross-browser compatibility issues and ways to work around such issues. 

● Familiarity with front-end build tools, such as Grunt and GulpJs. 

● Proficient understanding of code versioning tools, such as Git.

Good to have:

● Hands-on experience in Python

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.

Responsibilities

• Interact closely with design, product, and development teams to create elegant, usable, responsive and interactive interfaces across multiple devices.
• Turning UI/UX designs into prototypes, creating excellent interactions from designs, writing reusable content modules and maintainability of the code.
• Implement UI development principles to ensure that the product client-side serves at scale.
• Review and optimize the app usage by monitoring key metrics and rectifying the issues proactively.
• Review and Optimize application usage, by monitoring key metrics, for maximum speed and scalability
• Mentoring and guiding the team members.
• An ability to perform well in a fast-paced environment and bring in optimal flow for rapidly changing design/ technology.

Requirements

• 5+ years of relevant work experience as a web developer, UI developer, Angular Developer or front-end engineer.
• Sound knowledge in HTML, CSS & JavaScript.
• Familiar with UI layouts, SASS, Bootstrap, and the CSS GRID system
• Proficient with Typescript (Angular 2 & above)
• Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system.
• Passionate to create good design and usability
• A team player with excellent communication skills

Job title: React.js Developer 

Location: Gurugram (Onsite)

Notice: Immediate joiner 

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.

Requirements:

• Bachelor’s degree in computer science, information technology, or a similar field.

• Previous 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.

• Basic knowledge of Data Structure and Algorithm required

Role:

• Developing a good understanding of the solutions which Company delivers, and how these link to Company’s overall strategy.
• Making suggestions towards shaping the strategy for a feature and engineering design.
• Managing own workload and usually delivering unsupervised. Accountable for their own workstream or the work of a small team.  
• Understanding Engineering priorities and is able to focus on these, helping others to remain focussed too
• Acting as the Lead Engineer on a project. Helps ensure others follow Company processes, such as release and version control.
• An active member of the team, through useful contributions to projects and in team meetings.
• Supervising others. Deputising for a Lead and/or supporting them with tasks. Mentoring new joiners/interns and Masters students. Sharing knowledge and learnings with the team.

Requirements:

• Acquired strong proven professional Front End Development experience.
• Proven track record and experience working on Javascript and front end frameworks like React (preferred) and Angular
• Knowledge and experience working with Node.js, Go or any other back end programming language is a plus .
• Experience of turning UI/UX designs to applications and keen interest in the UI/UX side of an application. 
• Able to build prototypes quickly and work with the product teams to test a concept. 
• Demonstrable experience in building front end or UI/UX development practices in previous jobs. 
• Building and implementing a product on cloud based infrastructure.
• Good understanding of Microservice Architecture, Cloud Technologies, CI/CD and Serverless.
• Ability to document requirements and specifications.
• A naturally inquisitive and problem-solving mindset.
• Strong experience in using Agile Methodologies such as Kanban or Scrum to build quality software.
• Good communication skills.

JD:
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

Knowledge of isomorphic React is a plus

Familiarity with RESTful APIs

Knowledge of modern authorization mechanisms, such as JSON Web Token

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 such as Git