Frontend 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.

NEED TO HAVE :

1) Have some knowledge of front end like React.JS

2) HTML, CSS

3) Strong in Javascript concepts

4) Good communication skills

5) Loves to code

GOOD TO HAVE :

1) Experience with type script will be a plus

2) Experience with Nest.JS framework will be a plus

3) Strong hold on ES6 principles.

4) Familiar with TDD ( Test Driven Development ) will be a plus.

5) Familiar with working in CI / CD will be a plus

6) Micro-Service architecture knowledge will be an added benefit.

You can directly WhatsApp us on nine three one six one two zero one three two

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

Job Description for React Developer ( Senior Role)

Skill : API Integration, Material UI, Redux,React Hooks, React Nagivation, HTML/CSS

Experience - 3+

Location- Vikhroli, Mumbai

Working - 5 days a week

Technical and Professional Requirements:

Highly motivated, a responsible, passionate, self-learner individual with great interpersonal

React developers should have the ability to translate Wireframes and PSD Designs into functional

Knowledge of use-case scenarios of error-boundary, hooks, store/state management solutions

Binding of UI elements to JavaScript object models

Integration of RESTful services with React application

React developer must have proven experience in front-end development

Work in a cross-functional team to deliver a complete user experience

React developers must know application structuring and maintenance of an application

Create Unit and Integration tests to ensure the quality of code

We are looking for a React Native developer interested in building performant mobile apps on both the iOS and Android platforms. 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 both mobile platforms.
Leverage native APIs for deep integrations with both platforms.
Diagnose and fix bugs and performance bottlenecks for performance that feels native.
Reach out to the open-source community to encourage and help implement mission-critical software fixes—React Native moves fast and often breaks things.
Maintain code and write automated tests to ensure the product is of the highest quality.
Transition existing React web apps to React Native.

Skills
Firm grasp of the JavaScript, TypeScript, ClojureScript language and its nuances, including ES6+ syntax Knowledge of functional or object-oriented programming
Ability to write well-documented, clean Javascript code
Rock-solid at working with third-party dependencies and debugging dependency conflicts
Familiarity with native build tools, like XCode, Gradle Android Studio, IntelliJ
Understanding of REST APIs, the document request model, and offline storage
Experience with automated testing suites, like Jest or Mocha

Key Result Areas: 

• Build world class Webapps for the Ola Electric ecosystem.
• Work on a full product development lifecycle from requirement gathering, product design, development, to roll out and maintenance
• Effectively collaborate with multiple teams and stakeholders including product and design
• Own the delivery of multiple features of the product end to end 
• Advocate best development practices such as continuous integration/continuous delivery, automation (testing and infrastructure) and code modularity, extensibility, quality
• Experience in building Websites from Scratch is a big plus

Key Skills Required: 

• Min 3+ Years in Web Application Development
• Write clean, solid and testable code while keeping the user experience fast and reliable
• Strong understanding of HTML, CSS, JS, JQuery, Reach, Redux 
• Proficient in Web Interface designing
• Experience in developing reusable UI components
• Deep functional knowledge or hands on design experience with Web Services 
• Strong grasp of security principles and how they apply to E-Commerce websites.

Responsibilities

• Work on a full product development lifecycle from requirement gathering, product design, development, to roll out and maintenance
• Effectively collaborate with multiple teams and stakeholders including product and design
• Own the delivery of multiple features of the product end to end 
• Advocate best development practices such as continuous integration/continuous delivery, automation (testing and infrastructure) and code modularity, extensibility, quality
• Experience in building Websites from Scratch is a big plus

Primary Skills:

• Min 6+ Years in Web Application Development
• Write clean, solid and testable code while keeping the user experience fast and reliable
• Strong understanding of HTML, CSS, JS, JQuery, React, Redux 
• Proficient in Web Interface designing
• Experience in developing reusable UI components
• Deep functional knowledge or hands on design experience with Web Services 

Strong grasp of security principles and how they apply to E-Commerce websites

LOOKING FOR IMMEDIATE JOINERS OR 30DAYS FROM PRODUCT/ECOMM COMPANIES

• Bachelor’s degree in Computer Science, Information Technology, or a similar field.
• At least 5-10 years' 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, Web pack, Enzyme, Redux, and Flux, Vuejs, Angular++, Python and latest technology skills.
• 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.

• Experience in developing modern web applications using React and Redux.
• Strong proficiency in CSS, JavaScript, including DOM manipulation and the JavaScript object model
• Good understanding of Database schema, design, optimization, scalability.
• Great communication skills, strong work ethic.
• Ownership of the product from start to finish.
• Ability to learn new technologies quickly.

• Experience with AWS
• Expert level understanding of the HTML DOM and underlying event model
• Prior Open source contributions
• Experience building responsive design.