What services does A Major offer?

A Major offers web design, web app development, mobile app development (React Native, Swift, Flutter), SaaS product development, enterprise systems, UI/UX design, DevOps, performance optimization, MCP server development, AI agent infrastructure, MVP scoping, digital transformation, and engineering consultancy.

Where is A Major based?

A Major is based in Singapore and works with clients worldwide.

Do you work with international clients?

Yes. While headquartered in Singapore, A Major works with founders and businesses across Southeast Asia, Europe, and North America.

Ryu is an AI agent orchestration layer built by A Major. It enables teams to run, coordinate, and monitor AI agents at scale — connecting LLMs, tools, and workflows into reliable production systems.

Do you build MCP servers?

Yes. A Major builds Model Context Protocol (MCP) servers that connect AI agents to databases, APIs, and internal tools, enabling reliable LLM-powered workflows in production environments.

Is Elysia production-ready?

Elysia is stable and actively maintained with a growing community. It's well-suited for new API projects on Bun. For risk-averse enterprise environments, evaluate Bun runtime compatibility first.

How fast is Elysia compared to Express?

Elysia on Bun handles 2–3× more requests per second than Express on Node.js in benchmarks. Real-world gains depend on I/O patterns, but the performance difference is consistently measurable.

Can I use Elysia with existing npm packages?

Yes. Bun is npm-compatible and most packages work out of the box. Packages with native Node.js bindings may need Bun-specific alternatives.

Elysia vs Hono — which should I choose?

Elysia is Bun-specific with deeper runtime integration and Eden Treaty. Hono is runtime-agnostic (Cloudflare, Deno, Bun, Node). Choose Elysia for Bun-committed projects, Hono for multi-runtime portability.

server.ts

client.ts

Elysia BackendErgonomic Bun-native web framework

Elysia is built specifically for Bun — an end-to-end type-safe web framework with outstanding performance, a plugin ecosystem, and a declarative API that makes building APIs genuinely enjoyable.

Elysia is a Bun-native web framework built from the ground up for the Bun runtime. It delivers exceptional performance (consistently topping framework benchmarks), end-to-end type safety via TypeBox, and a plugin-based architecture that keeps code modular. At A Major, we use Elysia for high-performance API services where type safety and developer experience are equally important. Elysia's Eden Treaty client generates a fully typed API client from your server definition — no code generation step, no schema duplication. Combined with Bun's fast startup, built-in test runner, and npm compatibility, Elysia is our top pick for greenfield TypeScript APIs that need to be fast.

Quick start

bash

bun create elysia my-app
cd my-app
bun dev

Read the full documentation at elysiajs.com

Bun-native performance

Elysia on Bun consistently tops Node.js framework benchmarks — 2–3× faster than Express equivalents.

End-to-end type safety

Typed request/response schemas via TypeBox — validation, serialisation, and OpenAPI generation from the same definition.

Plugin architecture

Compose functionality with plugins — JWT, Swagger, CORS, rate limiting, and custom plugins all follow the same pattern.

Eden Treaty client

Type-safe API client generated from your Elysia server — share types between backend and frontend without code gen.

Lifecycle hooks

Global and per-route hooks for auth, logging, transformation, and error handling.

OpenAPI out of the box

Automatic Swagger UI and OpenAPI spec from your route definitions — no extra decorators.

Why it's hard

Bun runtime maturity

Bun is newer than Node.js and some npm packages with native bindings may not work. Testing compatibility early is critical for production projects.

Smaller ecosystem compared to Express

Elysia's plugin ecosystem is growing but significantly smaller than Express or Fastify. Custom middleware may need to be written from scratch.

Limited production case studies

Elysia is relatively new — fewer production war stories mean less community guidance for edge cases and scaling patterns.

Best practices

Use Eden Treaty for type-safe API clients

Eden Treaty generates a typed client from your Elysia server — share types across frontend and backend without code generation.

Leverage Elysia plugins for common concerns

Use official plugins for JWT, CORS, Swagger, and rate limiting instead of building custom middleware.

Structure routes with Elysia groups

Group related routes with shared middleware — auth, validation, and error handling scoped per group.

Use TypeBox for schema validation

TypeBox schemas validate requests at runtime while providing TypeScript types at compile time — single source of truth.

Useful resources

Elysia Official Documentation Elysia Eden Treaty Bun Runtime Documentation Elysia GitHub Repository

Frequently asked questions

Node.js

JavaScript all the way down

Drizzle ORM

TypeScript ORM that stays out of your way

Better Auth

The most comprehensive auth library for TypeScript

Looking for end-to-end delivery? These services complement Elysia projects.

Want to build with Elysia?

Talk to our engineering team about your Elysia architecture. We'll respond within 24 hours.

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Elysia BackendErgonomic Bun-native web framework