Senior Frontend Engineer

Peoplebox; Bengaluru; On-site; INR 1,000,000 - 1,500,000; Full time

Job summary

A fast-growing tech start-up is seeking a Senior Frontend Developer to create responsive user interfaces using ReactJS. You will work closely with designers and product managers to ensure pixel-perfect implementation of Figma designs, prioritize performance and accessibility, and leverage frameworks like Redux. Ideal candidates will have strong expertise in HTML5 and CSS3, as well as experience with UI/UX principles. This is a unique opportunity to join a dynamic team focused on driving business outcomes through effective performance management.

Qualifications

• 3+ years of production experience with ReactJS, including functional components and hooks.
• Strong expertise in managing global state using Redux with Thunk or Saga.
• Expert-level knowledge of responsive design using HTML5, Flexbox, and CSS Grid.

Responsibilities

• Develop responsive, component-driven user interfaces using ReactJS.
• Architect and maintain global state with Redux.
• Convert Figma designs into semantic HTML5 and CSS3.

Skills

ReactJS

Redux

HTML & CSS

Design Systems

UI/UX Principles

Git workflows

Tools

Figma

Lighthouse

Chrome DevTools

Job description

Peoplebox.ai is a fast-growing, YC-backed start-up building an AI-powered Performance Management platform. We help modern companies drive real business outcomes by aligning people, goals, and feedback — all inside everyday tools like Slack, Teams, and email.

We're looking for a Senior Frontend Developer to help us build sleek, responsive UIs in ReactJS - someone who cares about performance, accessibility, and bringing Figma designs to life pixel-perfectly.

What You’ll Do :

• Develop responsive, component-driven user interfaces using ReactJS (hooks, context API, and functional components).
• Architect and maintain global state with Redux using Thunk or Saga middleware.
• Leverage libraries like Ant Design, Material-UI, or Bootstrap, or build custom reusable components.
• Convert Figma designs into clean, semantic HTML5 and CSS3 using Flexbox and CSS Grid — matching mockups exactly.
• Design adaptive layouts for all devices, following accessibility standards (ARIA roles, keyboard navigation, etc.).
• Identify front-end bottlenecks, lazy-load assets, and fine-tune bundle sizes for efficient rendering.
• Work closely with designers, backend engineers, and product managers to align on vision and implementation.
• Write unit/integration tests (Jest, React Testing Library) and contribute to CI pipelines and component documentation.

Required Skills & Experience :

• ReactJS (3years): Production experience with functional components, hooks, and context API.
• Redux: Solid experience in global state management and async flows using Thunk or Saga.
• HTML & CSS: Expert-level knowledge in semantic HTML5, Flexbox, CSS Grid, and responsive design.
• Design Systems: Experience working with Antd, Material-UI, or custom-built component libraries.
• UI/UX Principles: Ability to evaluate and iterate on designs for usability, accessibility, and performance.
• Proficient in Git workflows (GitHub or GitLab).

Nice-to-Have :

• Design Tool Fluency: Familiarity with Figma, Sketch, or Adobe XD.
• Performance Profiling: Experience using Lighthouse, React Profiler, or Chrome.
• DevTools to identify rendering issues and improve performance.