Lead Frontend Engineer

Job overview:

We are seeking an experienced React.js Developer who is passionate about crafting high-quality, scalable, and performant front-end applications. The ideal candidate should have strong hands-on experience in modern JavaScript frameworks, UI development, and a keen eye for detail.

Key Responsibilities

• Develop and maintain responsive web applications using React.js, JavaScript (ES6+), HTML5, and CSS3.
• Build scalable and reusable UI components with React Hooks, Redux/Context API, and component-driven architecture.
• Optimize app performance to ensure fast load times, smooth interactions, and cross-browser compatibility.
• Write clean, modular, well-documented code following industry best practices and Git-based workflows.
• Troubleshoot, debug, and enhance existing features based on user feedback, analytics, and technical requirements.
• Integrate RESTful APIs and collaborate closely with backend engineers, designers, and product managers.
• Stay updated with emerging trends, tools, and best practices in front-end development to continuously improve the codebase and architecture.

Required Skills

• 4+ years of hands-on experience in React.js and JavaScript (ES6+).
• Strong understanding of HTML5, CSS3, Flexbox, Responsive Design, and UI frameworks (Tailwind/Bootstrap).
• Experience with state management using Redux, Redux Toolkit, or Context API.
• Hands-on experience with REST APIs, asynchronous programming, and front-end build tools (Webpack, Babel, npm/yarn).
• Good understanding of version control using Git.
• Ability to write efficient, scalable, and re-usable components following best practices.

Experience: 3.5 - 5 years

Description :

- Very good experience in design and development on UI front end Technologies.

- Minimum 3+ Years of web application development using HTML 5, CSS3, Bootstrap, JavaScript.

- Experience in development of Angular 2/4/6.

- Expertise in Responsive web design, HTML5, and CSS pre-processors SASS and LESS

- Good in UML, OOPS, design principles and patterns, architectural trends and data modeling.

- Strong in JavaScript (object oriented concepts) & JavaScript optimization

- Experience on JavaScript frameworks such as AngularJS, ReactJS, NodeJS etc.

- Ability to convert Wireframes in to UI design

- Good designing capabilities using Bootstrap framework, SEO and using strategies for cross-platform design initiatives with a 360-degree digital design

- Strong experience with debugging skills and fixing Cross Browser Compatibility issues and Optimization for web by using best practices

- Good Communication

- Good knowledge of quality standards and best practice

• 5+ years of experience as a Full Stack front end developer
• Proficient understanding of web markup, including HTML5, CSS3.
• Good understanding of client-side scripting and advanced JavaScript libraries/frameworks, AngularJS
• Good understanding of asynchronous request handling, knowledge of AngularJS practices and hand on implementation of complex AngularJS applications, directives, controllers, services.
• Good understanding of AJAX and JavaScript Dom manipulation Techniques.
• Experience in JavaScript build tools like grunt or gulp.
• Proficient with the JavaScript language and its modern ES6+ syntax and features.
• Proficient with .NET framework and its core principles
• Proficient understanding of code versioning tools, such as GIT/Bitbucket.
• Critical thinker and problem-solving skills.
• Good time management skills.
• Great interpersonal and communications skills.

ROLES AND RESPONSIBILITIES

• Build an advanced e-commerce admin dashboard application for our platform.
•  Proven working experience in React JS app development and experience with Web packs and integration with NodeJS.
•  Good understanding of Hooks and Redux State Management tools.
•  Understanding of React Design principles and architecture patterns.
•  Collaborate with cross-functional teams to define, design, and ship new features.
•  Work with outside data sources and APIs like the one of Unicommerce.
•  Create 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 maximizegies to maximize development efficiency.
• Translate designs high-quality into high quality code.
•  Have a good understanding of CI/CD tools (any).
•  Robust knowledge of popular databases like MongoDB, Elastic Search, DynamoDB, Redis etc;
•  Knowledge about AWS Amplify is super plus.

·

·

• CANDIDATES MUST HAVE
  
  
• · React JS, Redux
• · Hooks and redux state management
• · React design principles
• · Architectural pattern
• · Unit test code
• · High-level design
• · Ci/cd tool
• · Elasticsearch, DynamoDB, Redis
• · AWS amplify
• · ES6/ ECMAScript, JavaScript,
• · NodeJS ,IDEs, Restful API’s , Git

REQUIREMENTS

• Bachelor’s degree in computer science, software development, engineering, or a related technical field
• Proficient with the latest versions of ECMAScript (JavaScript) as well as HTML and CSS
•  Knowledge of React and common tools used in the wider React ecosystem, such as Node.js and npm
•  Familiarity with common programming tools such as Redux, IDEs, RESTful APIs, Git repositories, TypeScript, version control software, and remote deployment tools
•  An understanding of common programming paradigms and fundamental React principles, such as React components, hooks, and the React lifecycle

• Develop new user-facing features
• Build reusable code and libraries for future use
• Ensure the technical feasibility of UI/UX designs
• Optimize application for maximum speed and scalability
• Assure that all user input is validated before submitting to the backend
• Collaborate with other team members and stakeholders

Skills And Qualifications

• Proficient understanding of web markup, including HTML5, CSS3
• Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
• Proficient understanding of client-side scripting and JavaScript frameworks, including jQuery
• Good understanding of advanced JavaScript libraries and ReactJS frameworks.
• Good understanding of asynchronous request handling, partial page updates, and AJAX
• Basic knowledge of image authoring tools, to be able to crop, resize, or perform small adjustments on an image. Familiarity with tools such as Gimp or Photoshop is a plus.
• Proficient understanding of cross-browser compatibility issues and ways to work around them.
• Proficient understanding of code versioning tools, such as Git / Mercurial / SVN.
• Self-motivated and a good team player.
• Good communication and interpersonal skills.
• Preferred years of experience- 2- 3 years
• Bachelor’s Degree in Engineering from a reputed Institute.

Required Skills:

• Proven development experience on smartphone platforms.
• Hands-on experience on React Native Framework, including React JS, React Native, and JavaScript.
• Extensive programming experience with at least one programming language such as Swift, Java, JavaScript.
• Deep familiarity with iOS or Android development.
• Familiarity with RESTful APIs
• Familiarity with code versioning and CI/CD tools like Git, SVM, Jenkins.
• Must have worked on at least one app that is published in AppStores.

**About Company**
SleepyCat is India's First Mattress-In-A-Box brand! We deliver luxury mattresses, at a fraction of the usual cost, straight from our factory to your doorstep in an easy-to-carry package. 
In sleepycat we constantly thrive to make our products and customer experience better using technology.

**About Role**
We are currently looking out for a frontend developer who is motivated to learn and work on challenging projects. You should have a product mindset with great technical skills. In sleepycat we promote new and fresh ideas which can directly or indirectly help customer experience and sales. Sleepycat provides to you platform to bring your thoughts into action and implement them.

Technical skills required (expertise in atleast two of these): Javascript, CSS, PHP

**Personal and Domain Growth Initiatives**
1. In SleepyCat we promote career growth. Once you are settled and have completely owned the system you are hired for, you have the freedom to pick some other technologies inside SC. You will be given time to learn and contribute. Right now we have Web Development (PHP/JS), ReactJS and Ruby on Rails. So you have the freedom to utilize 30% of your time on any of these languages if you wish to and remaining 70% on your primary domain.
2. We also promote self-growth. You can utilize 10% of your time to learn any skill you want and we will help you with that. It is not restricted to the tech domain, could be anything from marketing to sales to personality development.

**Interview Process Details**
***Technical Round 1: Development Knowledge Round***
We will test your skills in 3 domains
understanding an existing written code and ability to make changes
coding a logical question to test basic coding skills
ability to think of test cases to write a full proof code
***Technical Round 2: Coding Round***
45 minutes coding round where you will be required to code live sharing your screen. On the spot problem will be given.

**Additional details**
Website: https://sleepycat.in/
Work Culture: 6 days(All Saturday half day)
Office Location: 91Springboard, Kalina, Mumbai
Employee Strength: 40+ Employees
Founded: 2017
Funding: $1.6 Million

Read about Sleepycat and funding on Crunchbase: https://www.crunchbase.com/organization/sleepycat
Learn what employees say about Sleepycat on Glassdoor: https://tinyurl.com/r9oqfkl
Checkout what people say about SleepyCat products on Google: https://tinyurl.com/rco3nqr