The Role
Lead frontend architecture and development for high-traffic React and Next.js products. Own features end to end from technical design through deployment, build shared design systems, enforce performance, testing, accessibility, and security standards, and optimize rendering and APIs. Mentor engineers, conduct reviews, collaborate with Product, Design, Backend, and DevOps, drive observability and experimentation, and contribute to tooling, technical strategy, hiring, and roadmap planning.
Summary Generated by Built In
You should apply if you have:
- Strong expertise in modern frontend technologies, with the ability to architect, design, and deliver scalable, high-performance user interfaces.
- Experience leading frontend initiatives, mentoring engineers, and enforcing best practices in UI architecture, performance, testing, and code quality.
- Hands-on experience with React.js and Next.js, building complex, production-grade web applications, including SSR, SSG, ISR, and the App Router / React Server Components.
- Solid understanding of frontend system design: state management, component architecture, data fetching and caching strategies, routing, and API integrations.
- Experience building or maintaining a design system or shared component library (e.g., with Storybook), in close collaboration with Design.
- A deep understanding of browser fundamentals: the rendering pipeline, the event loop, network behaviour, caching (HTTP, service workers, CDN), and memory management.
- Proven experience improving Core Web Vitals (LCP, INP, CLS) and measuring performance with tools like Lighthouse, WebPageTest, and Chrome DevTools.
- Experience working closely with backend teams to design clean, efficient, and scalable frontend–backend contracts (REST and/or GraphQL).
- A strong testing mindset, with experience writing unit, integration, and end-to-end tests.
- Familiarity with mobile-first and responsive design principles, and with cross-browser and cross-device compatibility.
- Exposure to React Native for building or maintaining cross-platform mobile applications is a strong plus.
- Experience working in cloud-based environments (preferably AWS) and collaborating within CI/CD-driven teams.
- A product mindset with a strong focus on performance, usability, accessibility, and business impact, including experience with analytics, A/B testing, and feature flags.
- An ownership-driven attitude: you care about the quality of what ships, not just the tickets you close.
You should not apply if you:
- Prefer working only on UI implementation without caring about architecture or long-term maintainability.
- Are not comfortable writing production-level code while guiding junior engineers.
- Avoid ownership of frontend performance, reliability, or UX issues.
- See testing, accessibility, or performance as "someone else's job."
- Are uncomfortable in a fast-paced, startup-like environment with evolving requirements.
- Dislike code reviews, documentation, or cross-team collaboration with Product, Design, and QA.
Skills Required:
Frontend
- React.js (hooks, concurrent features, Suspense) and Next.js (App Router, Server Components, SSR/SSG/ISR)
- TypeScript and JavaScript (ES6+)
- State management and data fetching (Redux Toolkit / Zustand / Context / React Query / SWR)
- TailwindCSS, CSS-in-JS, and modern CSS (Flexbox, Grid, container queries, CSS variables)
- Design systems and component libraries (Storybook, Radix / shadcn/ui or similar)
- Web performance optimization: code splitting, lazy loading, image and font optimization, bundle analysis, Core Web Vitals
- Technical SEO (metadata, structured data, rendering strategies for crawlability)
- Accessibility (WCAG 2.1/2.2, ARIA, keyboard navigation, screen reader testing)
- Forms and validation at scale (React Hook Form, Zod or similar)
Testing & Quality
- Unit and integration testing (Jest / Vitest, React Testing Library)
- Linting, formatting, and type-safety enforcement (ESLint, Prettier, strict TypeScript)
Mobile (Good to Have)
- React Native (Expo or bare workflow)
- Experience sharing logic, types, or components between web and mobile apps
Integration & Tooling
- REST API integration; GraphQL (Apollo / urql) is a plus
- Real-time communication (WebSockets / SSE) is a plus
- Build tools and bundlers (Webpack, Vite, Turbopack)
- Monorepo tooling (Turborepo / Nx / pnpm workspaces)
- Git, Bitbucket
- CI/CD pipelines (working knowledge), including preview deployments
- Basic understanding of Dockerized environments
Security
- Frontend security fundamentals: XSS, CSRF, CSP, secure token handling, and authentication flows (OAuth / JWT / session-based)
Nice to Have
- Familiarity with micro-frontend architecture (Module Federation or similar)
- Frontend monitoring and observability (Sentry, Datadog RUM, New Relic Browser)
- Product analytics tools (GA4, Mixpanel, Amplitude)
- Internationalization and localization (i18n / l10n)
- Progressive Web Apps (PWA) and offline-first patterns
- Exposure to e-commerce or high-traffic consumer platforms
What will you do?
- Lead frontend architecture, design, and development of key product features.
- Own the end-to-end frontend lifecycle, from technical design documents (RFCs) to deployment and post-release improvements.
- Collaborate closely with Product Managers and Designers to convert business requirements into high-quality, accessible user experiences.
- Build and evolve a shared design system and component library used across products.
- Define and enforce frontend best practices, including component design, state management, performance budgets, testing standards, and accessibility.
- Drive code reviews, technical discussions, and mentorship within the frontend team, and take part in hiring and interviewing.
- Optimize rendering performance, bundle size, caching, and API usage for low-latency, high-throughput experiences.
- Set up and monitor frontend observability (error tracking, real-user monitoring, performance dashboards) and lead the resolution of production issues.
- Work with backend and DevOps teams to ensure smooth releases, safe rollouts via feature flags, and production stability.
- Enable experimentation through A/B testing and analytics instrumentation.
- Contribute to long-term frontend strategy, tooling decisions, tech-debt management, and roadmap planning.
- Help scale frontend systems and team processes as the platform and user base grow.
Work Experience:
- 5-7 years of experience in frontend or full-stack development with a strong frontend focus.
- 1-2+ years in a senior individual contributor role (SDE-III) or technical leadership capacity.
- A proven track record of shipping and scaling React/Next.js applications in production.
- Experience building consumer-facing, high-traffic, or e-commerce platforms preferred.
Working days: Monday – Friday
Location: Delhi NCR (Work from Office)
Perks:
- Friendly atmosphere
- High learning & personal growth opportunity
- Flexible Timings
- Diverse work environment
Why Nutrabay:
We believe in an open, intellectually honest culture where everyone is given the autonomy to contribute and do their life’s best work. As part of the dynamic team at Nutrabay, you will have a chance to learn new things, solve new problems, build your competence, and be a part of an innovative marketing-and-tech startup that’s revolutionising the health industry.
Working with Nutrabay can be fun and a place of unique growth opportunities. Here you will learn how to maximise the potential of your available resources. You will get the opportunity to do work that helps you master a variety of transferable skills, or skills that are relevant across roles and departments. You will feel appreciated and valued for the work you deliver. We are creating a unique company culture that embodies respect and honesty, which will create more loyal employees than a company that simply shells out cash. We trust our employees and their voice and ask for their opinions on important business issues.
About Nutrabay:
Nutrabay is the largest health & nutrition store in India. Our vision is to keep growing, have a sustainable business model, and continue to be the market leader in this segment by launching many innovative products. We are proud to have served over 1 million customers to now, and our family is constantly growing.
We have built a complex and high-converting eCommerce system, and our monthly traffic has grown to a million. We are looking to build a visionary and agile team to help fuel our growth and contribute towards further advancing the continuously evolving product.
Funding:
We raised $5 million in a Series A funding.
Nutrabay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, colour, gender identity or expression, genetic information, marital status, medical condition, national origin, political affiliation, race, ethnicity, religion or any other characteristic protected by applicable local laws, regulations and ordinances.
Skills Required
- 5-7 years of experience in frontend or full-stack development with a strong frontend focus
- 1-2+ years in a senior individual contributor or technical leadership capacity
- Strong expertise in modern frontend technologies and scalable, high-performance UI architecture
- Production experience with React.js and Next.js, including SSR, SSG, ISR, App Router, and React Server Components
- Strong knowledge of frontend system design, state management, data fetching, caching, routing, and API integrations
- Experience building or maintaining design systems or shared component libraries
- Understanding of browser fundamentals, rendering, event loops, networking, caching, and memory management
- Experience improving Core Web Vitals and measuring frontend performance
- Experience designing scalable frontend-backend contracts using REST or GraphQL
- Experience writing unit, integration, and end-to-end tests
- Familiarity with responsive, mobile-first, cross-browser, and cross-device development
- Experience with cloud-based environments, preferably AWS, and CI/CD teams
- Knowledge of accessibility, including WCAG, ARIA, keyboard navigation, and screen reader testing
- Knowledge of frontend security fundamentals, including XSS, CSRF, CSP, secure token handling, and authentication flows
- React Native experience
- Experience with high-traffic, consumer-facing, or e-commerce platforms
- Experience with real-time communication, micro-frontends, monitoring, product analytics, internationalization, or PWA development
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The Company
What We Do
Nutrabay is an India-based online retailer and health and performance nutrition brand offering authentic nutritional supplements, vitamins, protein products, health foods, and bodybuilding essentials. Its catalog includes whey and plant proteins, creatine, pre-workout supplements, weight gainers, fish oil, multivitamins, protein oats, peanut butter, and protein bars. The company also sells its own supplement range alongside products from international and Indian brands.
