• Implement SLI/SLO frameworks with error budgets, driving data-informed reliability decisions across the platform • Design release strategies including blue/green deployments, canary releases, automatic rollback, and version tracking • Lead incident response, author post-mortems, and build automated runbooks that reduce MTTR • Develop internal tooling, automation frameworks, and self-service platforms in TypeScript/Python to improve developer productivity and operational efficiency • Write reliability-focused services: health checkers, auto-remediation controllers, capacity managers, deployment orchestrators, and chaos testing frameworks • Build and maintain production AWS infrastructure using IaC (Terraform/CloudFormation), with focus on ECS, EKS/Kubernetes, and microservices orchestration • Build and maintain end-to-end CI/CD pipelines for backend services, mobile apps (iOS/Android), and IoT firmware across on-prem and AWS cloud environments • Define and enforce security policies: network segmentation, IAM, secrets management, encryption, compliance auditing, vulnerability management, and incident response • Build comprehensive observability with OpenTelemetry, distributed tracing, custom metrics exporters, and alerting across WebSocket connections, message delivery pipelines, and real-time communication services • Manage PostgreSQL (RDS), Redis/ElastiCache, SQS, S3, and NLB/ALB configurations including Elastic IPs for SIP/RTP traffic