SDE-3 Frontend Engineer

Location: Mumbai (preferred) / Remote, India

Employment Type: Full-time

Experience: 6–10 Years

About the Role

We are looking for a Senior Frontend Engineer (SDE-3) to lead the design and delivery of world-class user experiences across Pepper's product suite. This is not a purely execution role — you will shape frontend architecture, establish engineering standards, and bring an AI-native lens to how interfaces get built. You will own the frontend end to end, mentor engineers, and partner closely with product and design to ship experiences that are fast, accessible, and intelligent.

Key Responsibilities

Architect and lead the development of scalable, performant frontend systems using React and Next.js
Define frontend engineering standards, patterns, and best practices across the team
Build and ship AI-powered UI features — conversational interfaces, agent-driven workflows, real-time streaming interactions — as first-class product experiences
Partner with product and design to translate complex requirements into clean, intuitive interfaces
Own performance, accessibility, and reliability across the frontend stack
Lead code reviews, technical design discussions, and frontend architecture decisions
Mentor SDE-1 and SDE-2 engineers, raising the bar on frontend craft and AI-native thinking
Identify and resolve performance bottlenecks, rendering issues, and UX gaps proactively.

Must-Have Skills

Expert-level React.js and Next.js, deep understanding of rendering models, SSR, ISR, and app architecture
TypeScript — strong typing, maintainable abstractions, scalable codebases
Strong CSS fundamentals, responsive design, design systems, component libraries
State management patterns at scale (Zustand, Redux, React Query, or equivalent)
REST API integration and experience working with async data flows
Deep understanding of frontend performance, Core Web Vitals, lazy loading, bundle optimisation
Experience with testing frameworks, Jest, Playwright, Cypress or equivalent
Git, CI/CD, and collaborative development workflows
AI-native thinking, default instinct to consider LLMs, streaming, and agentic patterns in product decisions.

Strongly Preferred

Experience building AI-powered frontend experiences, streaming LLM outputs, chat interfaces, agent step visualisation, tool-call feedback loops
Familiarity with design systems and component library ownership
Exposure to WebSockets, SSE, or real-time data in production
Prior experience in a tech or SaaS product company at scale.

What Success Looks Like

You own and drive complex frontend initiatives from design to production independently
Your code sets the standard, others reference it, learn from it, and build on it
You proactively identify UX and performance improvements before they become problems
You are a force multiplier for junior engineers on the team
You bring AI into the product naturally, not as a feature bolt-on, but as a design instinct

SDE 3 - FrontEnd