Responsibilities:

• Own the React Native mobile app—lead development, architecture, deployment (iOS + Android).
• Architect & scale AWS serverless infra: Lambda, DynamoDB, S3, API Gateway, AppSync, SNS/SQS.
• Build robust mobile-first APIs: sub-200 ms response times powering real-time features.
  
• Ship growth levers: referrals, feature flags, A/B tests, pricing experiments.
• Lead code reviews & set engineering standards that scale.
• Optimize for viral growth: handle spikes from 10 K to 1 M+ concurrent users at launch.

Requirements:

• 5+ yrs building consumer back-ends at 100 K+ MAU scale, plus proven mobile-app deployment.
• React Native mastery—complex state mgmt, navigation, perf tuning.
• End-to-end mobile deployment: App Store Connect, Google Play, Expo EAS, OTA updates, CI/CD.
• AWS serverless: Lambda, DynamoDB, S3, API Gateway, AppSync, SNS, CloudWatch, CDK/Terraform.
• Observability chops: OpenTelemetry, Datadog, Honeycomb, etc.
• Track record integrating auth (Clerk/Auth0), payments (Stripe), analytics SDKs.
• Scale-first mindset—design for 10× traffic growth without rewrites.
• Quality champion—strong code reviews, tests, docs.

Bonus Skills:

• RAG / LLM pipeline experience, vector DBs.
• React Native performance tuning (Hermes, Expo EAS).
• Mobile CI/CD wizardry, automated testing.
• SOC 2 Type II steering.
• Real-time systems (WebSockets, SSE, GraphQL subscriptions).