Full-Stack TypeScript 2024: Patterns & Best Practices

Full-stack TypeScript has become the standard for modern web development. At Softechinfra, our development team uses TypeScript across the entire stack for projects like AppliedView and Radiant Finance.

The Full-Stack TypeScript Stack

Type Safety Patterns

1. End-to-End Type Safety with tRPC

// server/router.ts
const appRouter = router({
  user: router({
    byId: publicProcedure
      .input(z.object({ id: z.string() }))
      .query(async ({ input }) => {
        return await db.user.findUnique({ where: { id: input.id } })
      }),
  }),
})
// client usage - fully typed from server!
const user = trpc.user.byId.useQuery({ id: '123' })

2. API Validation with Zod

const CreateUserSchema = z.object({
  email: z.string().email(),
  name: z.string().min(1),
  role: z.enum(['user', 'admin']).default('user'),
})
type CreateUserInput = z.infer<typeof CreateUserSchema>
// Use in API routes - validated + typed
export async function POST(req: Request) {
  const input = CreateUserSchema.parse(await req.json())
  return createUser(input)
}

Project Structure

my-app/
├── packages/
│   ├── web/           # Next.js frontend
│   ├── api/           # Backend API
│   ├── db/            # Prisma schema + client
│   └── shared/        # Shared types + utilities
├── package.json
└── turbo.json

Best Practices Checklist

• Enable strict mode and noUncheckedIndexedAccess
• Avoid 'any'—use unknown and narrow types
• Prefer type inference over explicit annotations
• Use discriminated unions for state management
• Implement branded types for domain IDs

For React patterns, see our React 19 Guide.

Learn more in our Next.js Performance Guide and see how our CEO approaches technical excellence.