Serverless Cold Start Latency
Unpredictable cold-start delays frustrate client applications and degrade API SLAs.
High-Performance Hosting for APIs & Microservices
Deploy RESTful APIs, GraphQL endpoints, and real-time WebSockets with sub-millisecond response times, zero serverless cold starts, automated SSL, and dedicated container isolation.
- Backend Engineers
- API Architects
- Microservice Teams
- DevOps Engineers
01 / The problem
The Pain Points of Modern API Infrastructure
API services demand consistent low-latency response times, high concurrency, and persistent WebSocket connections. Traditional serverless platforms suffer from unpredictable cold starts and connection limits, while raw VPS setups require tedious manual maintenance.
WebSocket & SSE Dropped Connections
Serverless API gateways automatically terminate long-lived connections, making real-time features difficult to maintain.
Complex Multi-Language Microservices
Running a polyglot backend (e.g. Node for Web, Python for AI, Go for microservices) requires custom orchestration infrastructure.
Manual SSL & Rate Limiting Gateways
Configuring Nginx reverse proxies, SSL certificates, and DDoS rate-limiting rules manually drains engineering focus.
02 / Why Deployxa
Why Backend Engineers Prefer Deployxa
Deployxa runs your backend code inside dedicated container instances. Enjoy zero cold starts, persistent WebSocket pipelines, automated HTTP/2 and gRPC protocol support, and automatic horizontal scale-out.
- Zero Cold Start Guarantee. Persistent compute instances ensure your API responds instantly on every single HTTP request without cold start lag.
- Native WebSockets & Real-time SSE. Unlimited WebSocket connection lifetime for real-time dashboards, chat apps, and streaming notifications.
- Multi-Language Container Engine. Deploy Node.js, Express, NestJS, Python (FastAPI/Django), Go, Rust, or PHP (Laravel) seamlessly using native buildpacks or Dockerfiles.
- Integrated API Health Probes. Automated liveness and readiness health checks route traffic exclusively to healthy container replicas.
03 / Capabilities
Built in, not bolted on.
Everything you need to run, observe and scale APIs & Backends in production.
Sub-Millisecond Cold Starts
Persistent application instances maintain warm memory caches for immediate response handling.
WebSockets & HTTP/2 Support
Full support for long-lived WebSockets, Server-Sent Events, and gRPC streaming payloads.
Automatic Docker Orchestration
Deploy via pre-configured runtime buildpacks or custom multi-stage Dockerfiles.
Edge Rate Limiting & WAF
Protect API endpoints from DDoS attacks and abuse with edge rate limiting and IP filtering.
Environment Secrets Encryption
Encrypted env variable injection for database URIs, API tokens, and JWT secret signing keys.
Horizontal Instance Scaling
Scale worker container instances up or down dynamically based on CPU and memory thresholds.
Live Structured Log Streaming
Stream JSON logs from stdout/stderr directly to the console or export to Datadog/Logtail.
Automated OpenAPI / Swagger Routing
Expose docs and health endpoints with automated HTTPS domain binding.
04 / Workflow
From code to live production.
Write Your API Code
Build your API using Express, NestJS, FastAPI, Django, Go, or Rust.
const app = express(); app.get("/api/v1/health", (req, res) => res.json({ status: "ok" }));
Commit to Git or Deploy via CLI
Push changes to GitHub or trigger a instant deploy via `deployxa deploy --prod`.
deployxa deploy --name my-api-backend
Runtime Detection & Container Build
Deployxa detects your language runtime or Dockerfile and builds an optimized image.
[Deployxa Engine] Detected: Node.js v20 (Express) | Port: 8080
Liveness & Readiness Probing
Automated health checks ping `/health` or `/ready` to verify container startup.
[Deployxa Probe] GET /api/v1/health -> 200 OK
Global Edge TLS & API Proxy
Binds custom SSL certificates and routes traffic through global edge proxies.
HTTPS -> https://api.yourdomain.com/v1/* (TLS 1.3 Active)
05 / Supported stack
Works with what you use.
- Node.js / Express · REST / Middleware
- NestJS · Enterprise Node
- FastAPI · Async / OpenAPI
- Django REST · ORM & Admin
- Go (Golang) · Gin / Fiber
- Rust · Axum / Actix
- Laravel API · Eloquent / Sanctum
- GraphQL · Apollo / Yoga
- WebSockets · ws / socket.io
06 / Compare
API Infrastructure Comparison
Compare persistent container hosting on Deployxa against serverless API gateways.
| Capability | Deployxa | Traditional cloud or DIY VPS |
|---|---|---|
| Cold Start Delays | 0 ms (Warm persistent containers) | 500 ms - 3000 ms delays |
| WebSocket & Real-time SSE Connections | Unlimited connection duration | Max 10-30s connection timeouts |
| Multi-Language Runtime Support | Node, Python, Go, Rust, PHP, C++ | Restricted runtime environments |
| Automated Health Check Probing | Built-in liveness & readiness probes | Requires custom ALB health checks |
| Cost at High API Request Volume | Flat compute resources (Predictable) | Exponential per-million request fees |
| Integrated Edge Rate Limiting & WAF | Included out of the box | Requires separate API Gateway setup |
07 / FAQ
Questions and answers.
Does Deployxa eliminate serverless cold starts for APIs?
Yes. Deployxa runs API instances inside persistent container environments. Your backend remains warm in memory 24/7, providing instant sub-millisecond response times.
Can I host WebSockets and real-time streaming APIs on Deployxa?
Absolutely. Deployxa supports long-lived WebSockets, Server-Sent Events (SSE), and gRPC streams without artificial gateway timeout restrictions.
Which backend languages and frameworks are supported?
We support Node.js (Express, NestJS, Fastify), Python (FastAPI, Django, Flask), Go (Gin, Fiber), Rust (Actix, Axum), PHP (Laravel API), and any custom runtime packageable via Dockerfile.
How does Deployxa handle API secret environment variables?
Environment variables are encrypted at rest and in transit. They are injected into application containers at runtime without exposing plain-text secrets in git repositories.
How do health check probes work during deployments?
You can define custom HTTP or TCP health check endpoints (e.g. `/health`). During a deployment, traffic is directed to new containers only after the health probe returns a 200 OK status.
Is rate limiting and DDoS protection included?
Yes. Deployxa Edge includes configurable rate-limiting rules and Web Application Firewall (WAF) filtering to guard against brute-force attacks and request flooding.
Can I scale my API horizontally across multiple container replicas?
Yes. You can scale your service across multiple instances with automatic load balancing, ensuring high availability during traffic spikes.
How can I inspect live logs and telemetry from my API?
Live application stdout and stderr logs are streamed to the Deployxa dashboard and CLI in real time. You can also forward logs to external observability vendors via log drains.
Ready when you are
Ready to deploy high-performance APIs with zero cold starts?
Deploy your REST, GraphQL, or WebSocket backend to global edge infrastructure in seconds.
No credit card required. Free plan included.