Front End Developer

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.

Wissen Technology is Hiring for React Developer

About Wissen Technology:

At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide. Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Today, Wissen Technology has a global footprint with 2000+ employees across offices in the US, UK, UAE, India, and Australia. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality. We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more. Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.

Job Summary:

We are seeking highly motivated React Developer

Experience: 8+ Years

Location: Pune/ Mumbai

Mode of Work: Full Time

Key Responsibilities:

• Should have 8+ years hands on experience in web technologies like JavaScript, HTML5 & CSS.

• Expert level knowledge of JavaScript including latest edition(s) of JavaScript (ES2023). Knowledge of typescript is a plus.

• Hands on experience with JavaScript frameworks like React 17 and above versions

• Good understanding of asynchronous request handling, partial page updates like Promises, RxJS

• Proficient in advanced CSS3, HTML5 and Bootstrap. Exposure to css-in-js libraries like styledjs or others is beneficial.

• Able to translate mockups in figma or illustrator to actual working components.

• Working experience on testing tool like karma/jasmine/enzyme.

• Basic understanding of nodejs is beneficial.

• Proficient understanding of code versioning tools, such as Git

• Excellent analytical/reasoning skills

• Good team player

• Excellent written and verbal communication skill

• Experience: 5+ years of professional experience in front-end development with a strong focus on React.js.
• Technical Skills: Proficiency in JavaScript (ES6+), HTML5, CSS3, and modern JavaScript frameworks/libraries.
• React Expertise: Deep understanding of React.js and its core principles, including hooks, context API, and state management.
• Tools: Experience with version control systems (e.g., Git), build tools (e.g., Webpack), and testing frameworks (e.g., Jest, React Testing Library).

Preferred Qualifications:

• Experience with: Knowledge of TypeScript, Redux, and modern front-end build pipelines and tools.
• Design: Familiarity with UI/UX design principles and responsive design.
• Blockchain: Understanding of blockchain technologies and cryptocurrency concepts is a plus.

The ideal candidate will have at least 2 years of experience in developing scalable and responsive web

applications, and will be able to work collaboratively with other developers and stakeholders to deliver

high-quality software products.

Responsibilities

● Develop and maintain responsive and scalable web applications using React and JavaScript

● Write clean, efficient, and maintainable code that adheres to coding standards and best practices

● Collaborate with other developers and stakeholders to design and implement software solutions

that meet business requirements

● Work with UX/UI designers to implement user interfaces that are intuitive and visually appealing

● Optimize web applications for maximum speed and scalability

● Participate in code reviews, testing, and debugging to ensure that the software meets quality

standards

● Stay up-to-date with the latest industry trends and technologies, and make recommendations to

the company on how to best incorporate them into its products and services

● Proficient in client & server-side JavaScript, HTML5, CSS3 and webpack

● Competent in building single page web applications using Node.js and React Js

● Redux for state management

● Universal rendering (Client-side rendering and Server-side rendering)

● Experience with cross-browser, cross-platform, and design constraints on the web

● Experience in developing automated unit and functional tests

● Experience in an agile development process

● Solid knowledge of algorithms and design patterns

● Have a passion for quality and writing clean, readable code that scales and performs well

● Good interpersonal communication skills

Desired Candidate Profile

● At least 2 years of experience in developing web applications using React/NextJS/VueJs and

JavaScript

4+ years of experience building Front end web applications

• Deep understanding of the ReactJS, Redux state container, Webpack module bundler
• Delivery of technical solutions with clean, well-tested code
• Be an active part of the engineering community team and collaborating with other developers
• You have solid experience working in an agile development environment
• Good JavaScript experience including asynchronous programming, pec closures, types, and ES6
• Demonstrable experience with RESTful APIs and JSON
• HTML 5 and CSS 3 as part of theming real-world projects
• Understanding of pre-processed CSS platforms such as Sass or Less.
• Proficiency in UI Prototyping Tools like Invision, Sketch, Adobe Experience Design etc.
• Good knowledge of responsive web design and experience with Git or other source control systems
• Knowledgeable and experienced with micro-service architecture
• Strong ability to debug code

We are looking for a passionate hands-on engineer to join our Engineering team.

• To build next-generation web applications which are efficient, reusable front-end abstractions and systems.
• Work closely with Product Managers, UX designers, and back-end engineers to implement front-end solutions while embracing emerging standards and pushing the limits of what a browser can do.
• Explore and design dynamic and compelling consumer experiences.
• Command an impressive portfolio of the latest UI technologies
• Analyze system function and performance requirements to support design concepts.
• Actively participate in design and code reviews to build robust applications and prototypes.
• Interacting with other team members to passionately collaborate our innovations.
• Constantly and consistently implementing new features and optimizing existing ones from controller-level to UI. Vigilantly and rapidly fix bugs.
• Create and maintain software documentation
• Endorsing upcoming standards, launching, iterating, and making a difference.

Ideal Candidate

• Proficiency with HTML5, Javascript, Angular JS, React JS and CSS3
• Ability to write well-abstracted, reusable, highly performant code for Website and Web applications.
• Experience with scripting languages (PHP) will be preferable.
• Excellent communication skills, good visual design sense, in-depth experience in developing web-based applications.
• Architecting, configuring, and automating the build process.
• A solid understanding of how web applications work including security, session management, and best development practices
• Aggressive problem diagnosis and creative problem-solving skills
• Ability to work and thrive in a fast-paced startup environment, learn rapidly, and master diverse web technologies and techniques.
• Knowledge in WordPress will be a plus
• Flexibility to work under ambiguous conditions