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Backend Engineering
Node.js APIsMicroservicesRealtime & Queues

Node.js 后端开发服务

Express、Fastify 和 NestJS API 构建完善

<50ms
API Response Time
P95 target
99.9%
Uptime SLA
Production systems
100%
Type-Safe
TypeScript throughout
0
Unhandled Errors
Observability-first
What Is Node.js Backend Development?

Node.js backend development is about building the server-side layer that everything else depends on — APIs, microservices, event-driven systems. Frameworks like Express, Fastify, and NestJS handle the core work: managing concurrent connections, routing requests, structuring your application logic. Add PostgreSQL for persistence, Redis for speed, and a proper queue system, and you've got the foundation that SaaS platforms and distributed systems actually run on.

项目失败的原因

Your REST API holds up fine in development, then falls apart the moment real traffic hits Users aren't waiting around for dashboards that take 3+ seconds to load. Every 100ms of added latency is quietly costing you conversions.
Payment webhooks fail Data pipelines drop records. There's no retry logic, no error handling worth the name — just silent failures that show up later as lost transactions and corrupted state.
You've got a monolith nobody wants to deploy Feature development slows to a crawl. Every release feels like you're defusing something.
Background jobs running on cron scripts or setTimeout calls vanish on restart, can't be retried, and give you no visibility into what failed or why You find out something went wrong when a customer complains.
Your monitoring is console.log Customers report outages before your own tools do. Mean time to recovery stretches into hours because you're flying blind.
Unindexed queries, full table scans on every request, and a database bill that went from $200 to $2,000 before you noticed PostgreSQL can do a lot — but not without a little help.

合规

Framework Selection

We pick Express, Fastify, or NestJS based on what the project actually needs. Fastify for raw throughput. NestJS for teams that need consistent structure across a large codebase. Express when ecosystem compatibility matters more than anything else.

Database Architecture

PostgreSQL schema design with Prisma ORM, proper indexing, and migration workflows you can actually trust. Supabase integration for auth, storage, and realtime subscriptions when it fits.

Redis & Caching Layer

Redis for session management, response caching, rate limiting, and pub/sub. Cache invalidation strategies that hold up under real production conditions — not just in theory.

Queue Processing

BullMQ job queues with retry logic, dead letter queues, priority scheduling, concurrency limits, and a monitoring dashboard. Background jobs that survive restarts and can be inspected when something goes wrong.

Webhook Architecture

Inbound and outbound webhook systems built with signature verification, idempotency keys, exponential backoff, and delivery logging. No more silent failures.

Production Observability

Structured logging, distributed tracing, custom metrics, and alerting wired into Grafana, Datadog, or whatever you're already running. OpenTelemetry instrumentation that actually tells you what's happening inside your system.

我们构建的内容

TypeScript-First APIs

Every endpoint is fully typed — request validation through Zod, response serialization, generated OpenAPI docs. Your frontend team gets a spec they can use immediately.

Realtime WebSocket Support

Socket.IO or native WebSocket implementations for live dashboards, chat, notifications, and collaborative features. Real-time that works at scale.

Authentication & Authorization

JWT, OAuth 2.0, API key management, and role-based access control. We use Supabase Auth where it makes sense and custom implementations where it doesn't.

Microservices Communication

Event-driven architecture with message brokers, gRPC for internal service communication, and API gateway patterns for external consumers.

CI/CD & Docker

Multi-stage Docker builds, GitHub Actions pipelines, and zero-downtime deployment strategies. Nothing goes down during a release.

Load Testing & Benchmarking

Artillery and k6 load tests are part of the process, not an afterthought. You'll know your system's breaking point before your users find it for you.

我们的流程

01

Architecture Audit

We start by reviewing your existing backend — or your requirements if you're building from scratch. We map the bottlenecks, design the architecture, and hand you a technical spec with data flow diagrams before anything gets built.
Week 1
02

Schema & API Design

Schema design, API contracts defined with OpenAPI specs, authentication flow planning. Everything gets documented and signed off before a line of code gets written. No surprises later.
Week 2
03

Core Implementation

Framework setup, database migrations, core API endpoints, background job infrastructure, webhook handlers. Test coverage ships alongside every feature — not as a follow-up task.
Weeks 3–5
04

Observability & Hardening

Structured logging, error tracking, health checks, rate limiting, load testing. We find the failure modes in staging, not production.
Week 6
05

Deployment & Handoff

Production deployment with monitoring dashboards, runbook documentation, and 30 days of post-launch support. Your team gets a full walkthrough of the codebase so they're not inheriting a black box.
Week 7
Node.jsExpressFastifyNestJSPostgreSQLSupabaseRedisBullMQPrismaDockerVercelAWS

常见问题

我应该在什么时候使用 NestJS 对比 Express 或 Fastify?

Express 拥有最大的中间件生态系统,学习曲线几乎为零——它是大多数项目的安全默认选择。Fastify 的运行速度快 2-3 倍,这对于每一毫秒都很关键的高吞吐量 API 很重要。NestJS 提供观点明确的结构——依赖注入、模块、装饰器——对于管理数十个服务的大型团队来说是正确的选择,因为一致性比原始性能更重要。

你如何在生产环境中处理数据库迁移?

我们使用 Prisma Migrate 进行 schema 版本控制。工作流程严格:在开发中生成迁移、在 pull request 中审查、在 staging 中测试、在部署期间应用到生产环境。破坏性更改遵循多步流程——添加新列、回填数据、更新应用代码,然后删除旧列。不会导致停机。

生产可观测性包括什么?

结构化 JSON 日志和请求相关 ID、通过 OpenTelemetry 跨服务的分布式追踪、自定义业务指标(如注册率和支付成功率)、健康检查端点和告警规则。Grafana 或 Datadog 仪表板让你一眼看到请求延迟、错误率和队列深度。你不再从客户那里发现问题。

你能与我们现有的前端集成吗?

可以。我们根据 OpenAPI 规范进行构建,你的前端团队从第一天就可以使用。TypeScript 客户端 SDK 从该规范自动生成,所以你的 React 或 Next.js 前端获得类型安全的 API 调用,无需任何人手动输入。CORS、认证令牌、WebSocket 连接——全部已处理。

你如何处理后台任务和队列?

我们使用由 Redis 支持的 BullMQ。每个队列都有重试逻辑和指数退避、失败任务的死信队列、优先级调度、并发限制和监控仪表板。任务在服务器重启后仍然存在。你可以通过管理 UI 检查、重试或取消它们——无需挖掘日志来弄清楚发生了什么。

REST 和 WebSocket API 有什么区别?

REST 是请求-响应:客户端询问,服务器回答,连接关闭。WebSocket 保持连接打开,这样服务器可以在发生变化时立即推送数据——这正是实时仪表板、聊天、通知和协作编辑所需的。大多数应用同时使用两者:REST 用于标准 CRUD 操作,WebSocket 用于实时更新,底层共享相同的认证和业务逻辑。

Node.js Backend Development from $8,000
Fixed-fee. 30-day post-launch support included.
See all packages →
Next.js DevelopmentCore Web Vitals OptimizationCore Web Vitals Complete Guide 2026

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