UI Developer

Position Overview: Front-End Developer (Next.js)

We are seeking an experienced Front-End Developer with strong hands-on expertise in Next.js and React.js. The ideal candidate will build and maintain scalable, responsive web applications using modern front-end technologies and best practices in performance, SEO, and rendering techniques.

Key Responsibilities

• Develop and maintain responsive, scalable web applications using React.js and Next.js
• Implement CSR, SSR, and SSG using Next.js best practices
• Build reusable, modular UI components following clean front-end architecture
• Integrate and manage REST APIs for data retrieval, caching, and error handling (React Query or similar)
• Optimize applications for performance, SEO, and accessibility
• Collaborate with backend engineers and UI/UX designers to deliver high-quality user interfaces
• Debug, test, and document code to ensure maintainability and scalability

Required Skills

• Strong knowledge of Next.js fundamentals (routing, rendering techniques, API routes)
• Proficiency with React Hooks and understanding of component lifecycle
• Solid experience integrating REST APIs and handling errors effectively
• Familiarity with state management libraries such as React Query, Redux, or Zustand
• Strong skills in JavaScript (ES6+), HTML5, and CSS3
• 7–10 years of front-end development experience

Primary Skills : 

React

Redux

Node basics for API integration

Convert design to code

Good HTML CSS

JS Fundamentals

Type, Location

Mumbai, Maharashtra, India

Desired Experience

4+ years

Roles and Responsibilities :

Skills required :

• Strong knowledge of javascript programming, ReactJS, HTML5, CSS3, SASS, ES6 Strong knowledge of modern responsive design techniques
• Strong knowledge of stateless microservices (node/java/etc..), HTTPS/REST, JSON, Webpack/Grunt/Gulp
• Very good understanding and implementation experience of web application UI using OpenID Connect login/authentication
• Version Control – Git, CI/CD of UI projects(e.g. CircleCI, Travis CI, Jenkins), configuration and deployment of static UI assets

Must have skills :

• Must have at least 4 years of industry experience in white labeled Front End web application design & development
• Experience in Test Driven Development, Front End testing and performance optimization (e.g. Jest, unit testing, end-to-end testing)

Job Title: Mid-Level Frontend Developer (React/TypeScript)

Job Description: We are looking for a Mid-Level Front End Developer with 2-3 years of experience in React and TypeScript to join our team. The ideal candidate should have a strong understanding of React and TypeScript, and be able to write high-quality, maintainable code. They should also be familiar with module CSS, have experience working with component libraries and state management frameworks, and have a passion for creating beautiful and intuitive user interfaces.

Responsibilities:

●      Develop high-quality, scalable, and maintainable code using React and TypeScript

●      Collaborate with cross-functional teams to design and implement new features

●      Participate in code reviews and contribute to code quality improvement initiatives

●      Use our in-house component library and Storybook to develop reusable components

●      Work with Recoil.js for state management and Context API for in-house libraries

●      Write clean, efficient, and well-documented code that follows best practices

●      Ensure code quality and maintainability through automated testing, linting, and code analysis

●      Stay up-to-date with the latest trends and technologies in front-end development

Requirements:

●      2-3 years of experience in developing front-end applications using React and TypeScript

●      Strong understanding of HTML, CSS, and JavaScript

●      Familiarity with module CSS and component libraries

●      Experience with state management frameworks like Recoil.js and Context API

●      Strong understanding of code quality and best practices

●      Excellent problem-solving and analytical skills

●      Good communication and teamwork skills

●      Bachelor’s degree in Computer Science or a related field is preferred

What you will do:

• Build cross-browser compatible front-end applications using ReactJS, JavaScript, HTML and CSS.
• Develop fast and highly scalable and responsive applications.
• Work closely with cross-functional teams of product manager, backend developers, and UI/UX designers.
• Partner with product teams to ensure user interactions & features are well-designed and implemented.
• Manage individual project priorities, deadlines and deliverables.

Skills And Qualifications:

• 4+ years of work experience in frontend web development.
• Strong understanding of Core Javascript, ReactJS, React Native (desired), semantic HTML5 CSS, Flexbox and responsive development.
• Thorough understanding of Javascript design patterns
• Proficient understanding of web markup, including HTML5 CSS3
• Understanding of server-side CSS pre-processing platforms, such as LESS and SASS
• Proficient understanding of advanced JavaScript libraries and frameworks, such as ReactJS, AngularJS
• Good understanding of asynchronous request handling, partial page updates, and AJAX
• Preferably from a SaaS and web applications platforms background, and/or B2B applications.
• Proficient understanding of cross-browser compatibility issues and ways to work around them
• Proficient understanding of code versioning tools, such as Git
• Experience in building APIs / application backends using Node.js (good to have)

Understanding of UI / UX best practices and ability to collaborate with the Design team to implement functional and intuitive user experiences

Toplyne is a global SaaS product built to help revenue teams, at businesses with a self-service motion, and a large user-base, identify which users to spend time on, when and for what outcome. Think self-service or freemium-led companies like Figma, Notion, Freshworks, and Slack. We do this by helping companies recognize signals across their - product engagement, sales, billing, and marketing data.

Founded in June 2021, Toplyne is backed by marquee investors and angels (we'll be happy to tell you how much we've raised, and from whom on call). We are building out our founding team as we speak and we'd love to chat with you!

You taking a lot of pride in writing scalable, readable & maintainable code. You have a product bent of mind. You like working in a fast paced environment and ship code most days of the week. You enjoy working cross functionally in a collaborative environment with designers, PM's to build the best product possible. You don't mind getting on customer calls to understand their perspective to build a better product or help them with issues they might be facing.

You're hungry, ready to hustle, and keen to learn!

As a founding member of the core engineering team, you will:

• Work with the founders in co-creating the product with early believers (read: customers)
• Develop massive, complex software systems that scale globally.
• Build and own a substantial part of the product and help build the culture of engineering within Toplyne

• Strong first principles
• Hustle! We're young, lean, and in our early days. You'd have to set up your own shop, work with design customers to find generalisable use cases, and build them out.
• Ability to collaborate with cross-functional teams to build and ship new features
• 2-6 years of experience
• Good understanding and experience working with javascript frameworks such as React.
• Work closely with developers and UX designers to ensure that the presentation layer is implemented in accordance with best above best practices and UX specifications.

• Not looking for a 10x engineer. We are ok if you are 1x but are really good at what you, a good human being & work well in a team.