Frontend Engineer

Position Title : Frontend / Chrome Extension Developer (React + TypeScript)

Experience : 3+ years

Location : Remote

Job Role Summary :

Build and ship production-ready Chrome extensions that inject UI into existing web apps. Own content scripts, DOM integration, performance, and accessibility (WCAG 2.1 AA).

Mandatory Skills :

React, TypeScript, Chrome Extensions (MV3), Content Scripts, DOM Injection, MutationObserver, TailwindCSS/CSS Modules, Accessibility (WCAG 2.1 AA).

Key Responsibilities :

• Develop Chrome extensions using React + TypeScript.
• Inject and manage UI components within third-party web app DOMs.
• Write and maintain content scripts; handle dynamic pages via MutationObserver.
• Implement clean, responsive styling with TailwindCSS or CSS Modules.
• Ensure accessibility (WCAG 2.1 AA), keyboard navigation, and ARIA semantics.
• Integrate with APIs, manage extension permissions, storage, and messaging.
• Optimize performance, handle edge cases across sites, and write basic tests.

Required Skills :

• Strong React + TypeScript in production.
• Chrome Extension architecture: manifest v3, content/background scripts, messaging, permissions.
• DOM manipulation and safe UI injection strategies.
• MutationObserver, event delegation, handling SPA route changes.
• TailwindCSS or CSS Modules; solid CSS fundamentals.
• Accessibility (WCAG 2.1 AA) and cross-browser compatibility (Chromium/Firefox optional).
• Familiarity with build tooling (Vite/Webpack), linting, and Git.

Nice-to-Have :

• Experience with service workers, storage (sync/local), and i18n.
• Testing with Jest/RTL/Playwright.
• Security basics for extensions (CSP, sandboxing).

Responsibilities:

• Design the overall architecture of the web application.
• Maintain code integrity, and quality, and ensure responsiveness of applications.
• Address and improve any technical issues.
• Building reusable components and front-end libraries for future use.
• Must have strong experience in designing and maintaining a database.
• Work with modern frameworks and design patterns, minimum one-year experience with Full stack paradigm required.
• Handle technical queries raised by the development team and provide support and guidance to them.
• Troubleshoot and debug issues, perform testing, and optimize application performance
• Collaborate with front-end and back-end engineers to design and create advanced, elegant, and efficient systems.

Skills:

• Strong proficiency with 3 - 5 years of experience.
• Expertise in Laravel and a good understanding of other core PHP frameworks using REST APIs.
• Professional, definite communication skills.
• Excellent knowledge of HTML, CSS, Ajax, jQuery, and JavaScript.
• Extensive experience in designing and maintaining databases such as MySQL.
• Mastery of CMS such as WordPress and Magento is an advantage.
• Comprehensive knowledge of version controlling – GIT.
• Creating self-contained, reusable, and testable modules and components.
• Optimizing client and server-side code for maximum speed.

UI Development - Intern

Converts into a full time ‘UI Developer’ position based on performance

A UI Developer, for an early-stage Analytics startup who can help us translate UX designs into a responsive and rich user interface. Also help in improving design/functionality of product. End goal is to achieve product-market objectives

The candidate will have rich learning into what goes into designing, developing, and scaling a product from scratch. A chance to grow into a UI Development Owner in medium term

Responsibilities

1. Own UI Development closely with UX / Technology Owner

2. Implement and maintain product UI modules/sub-systems.

3. Perform bug verification, release testing and support for assigned products.

4. Conduct unit testing and integration testing.

5. Make sure the delivered product matches the business requirements.

Expectations from candidate

1. Ability: Good at logical thinking, problem solving

2. Inclination: Curious and strong willingness to learn from problems, write good code

3. Knowledge: Basics of UI Development (Some academic degree/certification or Prior experience/Projects preferred), Data visualization

4. Languages/Frameworks: HTML, CSS, JavaScript, ReactJS, NextJS

5. Interest in product focused work in a fast-moving start-up environment

6. Attitude: We are looking for a person with an owner mindset who can partner with us in building our product with a lot of commitment. We like people who are curious problem solvers and are interested in learning with us and working hard.

What we offer

1. Great culture focused on outcomes through learning and experimentation

2. Mentoring by experienced professionals from pedigreed backgrounds (IIT/IIMs)

3. Growth, ownership, and flexibility to achieve your goals.

 What you need to have:

• Minimum of 4 years (and above) experience in modern UI frameworks like ReactJS web/Native
• Experience and expertise in HTML, CSS and Javascript
• Familiar with UI design concepts and user interface design
• Experienced user of the GIT/GITHUB repository
• Experience with hands on UI development
• Experience in modern UI frameworks like ReactJS web/Native

• Meeting with the development team to discuss user interface ideas and applications.
• Reviewing application requirements and interface designs.
• Identifying web-based user interactions.
• Developing and implementing highly responsive user interface components using react concepts.
• Writing application interface codes using JavaScript following react.js workflows.
• Troubleshooting interface software and debugging application codes.

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.