Lead Frontend Engineer

MUST-HAVES:

• 5+ years of professional experience in web development.
• Strong proficiency in React.js and the Next.js framework.
• Solid understanding of JavaScript (ES6+), HTML5, Tailwind and TypeScript.
• Experience with server-side rendering (SSR) and static site generation (SSG).
• Familiarity with state management libraries (e.g., Redux, Context API).
• Proficient with version control systems like Git.
• Experience with modern build tools and package managers (e.g., Webpack, Babel, NPM/Yarn).
• Familiarity with API integration (REST, GraphQL).
• Strong understanding of web performance optimization techniques.
• Knowledge of testing frameworks (e.g., Playwright, Jest, Cypress).
• Ability to work in an Agile environment, collaborate with cross-functional teams, and deliver high-quality code under tight deadlines.

SKILLS: REACT, REACT NATIVE, PLATFORM INTEGRATION, JAVASCRIPT

Notice Period: 0-15 Days only

Additional Guidelines:

Interview process: - 2 Technical round + 1 Client round

3 days in office, Hybrid model.

JOB DESCRIPTION:

We are seeking a highly skilled Senior Web Developer with deep expertise in React and Next.js to join our growing team. The ideal candidate will have extensive experience in building high-quality, scalable web applications and will take ownership of both frontend development and architecture. As a Senior Developer, you will collaborate closely with product managers, designers, and other developers to deliver robust and performant solutions. Your ability to solve complex problems, optimize web performance, and mentor junior developers will be key to success in this role.

KEY RESPONSIBILITIES:

• Design, develop, and maintain web applications using React and Next.js.
• Architect and optimize web pages for speed and scalability.
• Build reusable components and front-end libraries for future use.
• Implement server-side rendering and static site generation using Next.js.
• Collaborate with the backend team to integrate APIs and ensure seamless front-end and back-end communication.
• Ensure the technical feasibility of UI/UX designs and implement pixel-perfect user interfaces.
• Work with product teams to build features that improve user engagement and satisfaction.
• Troubleshoot, debug, and upgrade existing systems.
• Provide technical leadership and mentorship to junior developers.
• Stay up-to-date with the latest web development trends, frameworks, and tools.

REQUIREMENTS:

• 5+ years of professional experience in web development.
• Strong proficiency in React.js and the Next.js framework.
• Solid understanding of JavaScript (ES6+), HTML5, Tailwind and TypeScript.
• Experience with server-side rendering (SSR)and static site generation (SSG).
• Familiarity with state management libraries (e.g., Redux, Context API).
• Proficient with version control systems like Git.
• Experience with modern build tools and package managers (e.g., Webpack, Babel, NPM/Yarn).
• Familiarity with API integration (REST, GraphQL).
• Strong understanding of web performance optimization techniques.
• Knowledge of testing frameworks (e.g., Playwright, Jest, Cypress).
• Ability to work in an Agile environment, collaborate with cross-functional teams, and deliver high-quality code under tight deadlines.

PREFERRED QUALIFICATIONS:

• Experience with Next.js API routes and serverless functions.
• Familiarity with cloud platforms (e.g., AWS, Vercel) and CI/CD pipelines.
• Experience with modern CSS frameworks (e.g., Tailwind, Styled Components).
• Knowledge of SEO best practices for React and Next.js applications.
• Contributions to open-source projects or a portfolio of personal projects.

We were founded in 2014 with a mission to develop and deliver applications to small businesses in India, using which these businesses can achieve new heights in their business.

Most of these companies lack behind because they can’t afford high end applications, and don’t buy these applications majorly because many of its features are not useful to their business. We develop customized applications as per customer’s business needs.

Founder & CEO - Karan Jain

Position - Frontend Engineer

Responsibilities

● Use markup languages like HTML to create user-friendly web pages

● Maintain and improve website

● Optimize applications for maximum speed

● Design mobile-based features

● Collaborate with back-end developers and web designers to improve usability

● Get feedback from, and build solutions for, users and customers

● Write functional requirement documents and guides

● Create quality mockups and prototypes

● Help back-end developers with coding and troubleshooting

● Ensure high quality graphic standards and brand consistency

● Stay up-to-date on emerging technologies

Requirements and skills

● Proven work experience of 4-5 years as a Front-end developer

● Hands on experience with markup languages

● Experience with JavaScript, CSS and jQuery

● Familiarity with browser testing and debugging

● In-depth understanding of the entire web development process (design, development and

deployment)

● Understanding of layout aesthetics

● Knowledge of SEO principles

● Familiarity with software like Adobe Suite, Photoshop and content management systems

● An ability to perform well in a fast-paced environment

● Excellent analytical and multitasking skills

● BSc degree in Computer Science or relevant field

• Deep understanding of JS basics and advanced features (ES6) (5+ years)
• Deep understanding of basic and advanced HTML5 / CSS3 features (5+ years)
• Hands on experience developing scalable applications using React JS (preferably using functional components) (2+ years)
• Proficiency in using hooks based approach in react development
• Hands on experience developing UI components using Material UI for React JS (2+ years)
• Experience with any of the state management libraries for React JS – Redux, Context API, Mobx etc
• Experience with unit testing using Jest, Enzyme, React Testing Library etc
• Experience with responsive design, progressive web apps and accessibility.
• Knowledge about platform tools such as NPM, Git command line tool and AWS.

Senior / Lead Full Stack or Frontend Engineer

Hiring for a Series E, 3.1 Billion Dollar rapidly growing organisation focused on payments, marketing and customer loyalty.

• To take ownership of delivering performant, scalable and high quality cloud based software, both frontend and backend side.
• Code reviews.
• Mentoring Team members to develop in line with product requirements.
• Collaborate with Senior Architect for design and technology choices for product development roadmap.

• Thorough knowledge of developing cloud based software including backend apis and react/angular based frontend.
• Thorough knowledge of scalable design patterns and message based systems such as Kafka, RabbitMq, Redis, MongoDB, ORM, Sql etc.
• Experience with AWS services such as S3, IAM, Lambda etc.
• Expert level coding skills in NodeJs,TypeScript,Scala,ReactJs,Angular.
• Eye for user centric mobile first designs on the frontend.
• Experience with hybrid frontends such as react-native, electronJs is a plus.    

**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

Technical Lead Typescript Front End Developer:

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• Good communication skills
• Strong background in developing mobile games using OOJS, JavaScript , Typescript, HTML and CSS
• Experience in gaming framework and libraries like Phaser and Create JS
• Knowledge of Object Oriented design patterns
• Experience in game development for mobile devices (IOS/Android browsers)
• Excellent analytical skills for debugging and problem solving
• Excellent problem solving skills and aptitude 
• Ability to review code and design. ​

• Knowledge of various JavaScript libraries available for developing games
• Knowledge of Node JS, NPM & Grunt
• Knowledge of Pixi JS & Cocos2d-x
• Basic knowledge about graphics manipulation software like Photoshop, gimp etc.
• Experience in game development for mobile devices browser (IOS/Android browsers)