Mobile & SaaS

Mobile App Backend — Zero Cold Start

Your mobile app feels slow on first launch. Users blame the app — but the real culprit is a cold Lambda. This blueprint delivers a backend that responds in under 100ms.

Client Profile
Reference Architecture
Timeline
3 Weeks
Core Tech Stack
Lambda API Gateway Cognito DynamoDB CloudFront

The Challenge

Cold starts are the silent killer of serverless mobile backends. A user opens your app and waits 2-3 seconds for the first API response. They assume the app is broken. This blueprint eliminates cold starts using Provisioned Concurrency and CloudFront edge caching.

The Problem

Lambda functions that have not been invoked recently take 1-3 seconds to initialize. For a mobile app, that is an eternity. Users expect sub-200ms responses.

The Architecture

  • Lambda Provisioned Concurrency on critical paths (auth, home feed)
  • Cognito for authentication — no custom auth server
  • DynamoDB single-table design for sub-10ms reads
  • CloudFront caches API responses at the edge

What You Get

  • Sub-100ms response on warm paths
  • Cognito-managed auth — no password storage bugs
  • Scales to millions of users without re-architecture

Business Impact

Cold Starts Eliminated
Response Time <100ms
Want This Built for You?

This is a reference architecture we can deploy and adapt to your specific requirements.

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