Senior Vietnamese Web App Engineers, React, Next.js, Node, Python

How Sapota's web app builds are structured

The default stack on web app engagements is Next.js (App Router on Next 16, the same framework this site runs on) with React Server Components for data-heavy surfaces, client components only where interactivity demands it, and Vercel for hosting unless the rest of your infra forces a different provider. The pattern keeps the SEO and Core Web Vitals work straightforward; we treat both as acceptance criteria, not as a separate audit phase tacked on at the end.

For projects where Next.js is not the right pick, the team also ships Remix, plain Vite + React for SPAs, and static Astro for content-heavy sites that do not warrant a full SSR framework. The pick depends on the project, not on what is currently fashionable on Hacker News. We say so honestly when the stack you ask for is the wrong answer for your project. Cancelling a six-month build to swap frameworks is more expensive than the awkward fifteen-minute conversation up front.

Backend pairing: most web projects need an API. Sapota engineers ship Node (Express, Fastify, Hono), Python (FastAPI), and Go (Gin, Fiber) depending on workload and team preference. For data layer, Postgres covers most cases; we add Redis for cache, BullMQ for job queues, and Elastic or Postgres full-text for search depending on volume. CMS pairing options include Sanity, Contentful, Strapi, or filesystem markdown (the path this Sapota site itself took); see the Marketing Cloud blog category for the engineering notes on filesystem-backed content that came out of this migration.

Adjacent services: for mobile companion apps, see the mobile app development page; the same team often ships both. For AI features built into the web app (chat, search, summarization), the AI page covers the LLM, RAG, and agent patterns we use. To scope a web app engagement, reach out via the contact page; the first call is usually a stack-and-scope conversation, not a sales pitch.