Senior Frontend Developer (React) Senior (5+ Years) Mumbai, India Full-time, in office Apply for this role Overview

Unico Connect is seeking a Senior Frontend Developer (React) to lead frontend architecture and design-system implementation across enterprise client engagements. The role owns performance engineering, accessibility, type-safety, and the mentorship that scales the frontend practice. The position is well suited to senior frontend engineers with deep React 18+ and Next.js App Router production experience and a track record of building design systems.

Key Responsibilities

- Architect Next.js applications including App Router, server components, and edge rendering
- Own design-system implementation in React with Tailwind or CSS-in-JS
- Drive performance including Core Web Vitals, bundle size, code splitting, lazy loading, and edge caching
- Implement accessibility (WCAG 2.2 AA) and SEO best practices
- Mentor 2-3 junior frontend engineers through code reviews, design reviews, and 1:1s
- Partner with designers on design tokens and component API design
- Set frontend testing standards (Vitest, Playwright, Storybook visual regression)
- Lead production incident response for frontend systems
- Author internal frontend playbooks and onboarding documentation
- Calibrate the frontend interview bar and conduct senior interview loops
- Govern frontend security including CSP, XSS, and CSRF mitigation patterns

Required Qualifications

- 5+ years of frontend engineering with at least 2 in a senior role
- Deep React 18+ and Next.js (App Router) production experience
- Strong TypeScript fundamentals including generics, type inference,



and strict mode
- Production experience building or maintaining a design system
- Deep understanding of browser internals: rendering, layout, performance
- Hands-on with Playwright, Vitest, and visual regression tooling
- Capacity to lead design-engineering handoff with senior designers
- Excellent code review, mentorship, and written communication skills
- Track record of shipping at least 1 product at production scale
- Bachelor's degree in Computer Science, Engineering, or a related field

Preferred Qualifications

- Micro-frontends or module federation experience
- WebGL, Canvas, or WebGPU work
- Open-source contributions to React, Next, or Tailwind ecosystem
- Conference talks or technical writing on frontend engineering
- Design system author or significant contributor

AI Tools Proficiency Production engineering at Unico Connect assumes AI tools form part of the daily workflow rather than an experimental augmentation. For this role specifically:

- Cursor or Claude Code as the default integrated development environment
- v0 or Bolt for design-to-code translation
- AI-augmented Storybook workflows for visual regression
- Figma Dev Mode with AI assistance for handoff





Required Skills React 18+Next.js (App Router)TypeScriptTanStack QueryTailwind / CSS-in-JS Benefits

- Hybrid working model — 1 day work-from-home per week
- MacBook Pro and external monitor for work
- Paid subscriptions to Claude, ChatGPT, and Cursor
- Team events, offsites, and outings
- Referral bonus when you bring in a successful hire

What we look for at Unico Connect Every Unico role expects the same underlying traits — regardless of department or seniority. If these resonate, apply.

AI-augmented by default Fluent with Claude, ChatGPT, Cursor, Figma AI, or whatever is relevant to your craft. We expect AI tools in the loop, not as a novelty.

Comfortable with startup pace Fast cycles, real ownership, low ceremony. You will not be a cog.

Driven by value creation Output and outcomes matter more than process. You ship work that moves a metric.

Ownership mindset You treat the codebase, the deliverable, and the client relationship as your own.

Builder energy You joined because you want to ship amazing tech products, not warm a seat.

Ready to build the future?

Join our team of engineers and help us shape the next generation of AI-native software for clients across the globe.

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📌 Senior Frontend Developer (React) (Mumbai)
🏢 Unico Connect
📍 Mumbai