Hire senior Next.js developers in your time zone.

A senior Next.js engineer owns more than component code; they make structural decisions that affect performance and cost.

• Deciding what renders on the server, what renders on the client, and why, for every part of the application
• Structuring routes, layouts, and shared UI with the App Router or Pages Router
• Building API routes or route handlers for backend logic that lives alongside the front end
• Setting up caching and revalidation so pages stay fast without serving stale data
• Owning Core Web Vitals and diagnosing regressions before they affect real users

On smaller teams, this engineer is also often the one making the call on hosting and deployment configuration, since Next.js decisions and deployment decisions are closely linked.

Next.js sits inside a fairly opinionated ecosystem, and a strong candidate should be comfortable across most of it.

• Vercel: the platform Next.js is built by, and the most common deployment target, though Next.js also runs on other infrastructure
• TypeScript: the default choice for any Next.js project of real size, used across components, route handlers, and shared types
• Tailwind CSS: the most common styling approach in current Next.js projects, though CSS Modules and styled-components still show up in older codebases
• Data layer tools: GraphQL clients, ORMs like Prisma, and direct database access from server components or route handlers

A candidate who can explain why a project chose one of these tools over another, not just that they used it, is usually the stronger hire.

Next.js interviews reward asking about decisions rather than definitions, since most candidates can define server components but far fewer have made real tradeoffs with them.

• Ask for a specific rendering decision they made and why, not just a description of the App Router
• Walk through a slow page together and listen for how they would diagnose it: bundle size, data fetching waterfalls, or missing caching
• Ask how they handle revalidation for data that changes frequently versus data that rarely changes
• Check deployment experience: have they configured environments, previews, and rollbacks, or only pushed code and let a platform handle the rest

BetterEngineer runs this kind of technical evaluation before a Next.js profile reaches your inbox, so the conversations you have are already with candidates who have cleared this bar.

Quick evaluation checklist:

• Ask for a Next.js project where they made real decisions about server versus client rendering, not just default settings
• Review how they handle data fetching and caching, including revalidation strategy
• Check their comfort with the App Router specifically, since many candidates still default to older Pages Router patterns
• Ask about a performance problem they diagnosed and fixed, and what Core Web Vitals metrics they tracked
• Look for deployment experience beyond just pushing to Vercel and hoping it works