ASADULLAH BIN HUSSAIN

- Scaled multi-region production infrastructure from two to three AWS regions, owning VPC/CIDR planning, EKS provisioning, RDS replication, and DNS delegation to support global SaaS workloads. - Executed zero-downtime EKS cluster upgrades across five sequential Kubernetes minor versions (1.29 to 1.34) using Karpenter-driven rolling node replacements, Pod Disruption Budgets, and addon compatibility validation. - Led a cloud cost optimization program across multiple regions and accounts, achieving 20-30% spend reduction (estimated $37K-$55K annual savings) via Compute Savings Plans, VPC endpoints, log retention policies, and right-sizing. - Designed a configuration-driven blue-green deployment system for 8+ microservices using Pulumi and ArgoCD, enabling GitOps-based atomic traffic switching with instant rollback and zero downtime. - Built a multi-tenant enterprise onboarding platform supporting self-service tenant provisioning with isolated Kubernetes namespaces, dedicated AWS Cognito user pools, S3 buckets, DNS/SSL automation, and OAuth integration. - Migrated stateful workloads (NATS, Redis) from Deployments to StatefulSets with per-pod persistent volumes, deployed a 3-node NATS JetStream cluster with anti-affinity, topology spread constraints, and PDB-protected rolling upgrades. - Implemented distributed tracing across polyglot services (Node.js, Python, FastAPI) with New Relic APM, including custom trace-context propagation across NATS JetStream and Redis pub/sub boundaries. - Re-architected database migration flow into ArgoCD PreSync Jobs with GitHub Actions automation and Slack alerting, eliminating duplicate-migration race conditions across replicated workers. - Provisioned global CloudFront CDN with Origin Access Control, ACM certificates, and Route 53 DNS validation for low-latency static asset delivery across regions. - Authored a reusable Helm chart library powering 11+ microservices, supporting blue-green variants, stateful templates, and pre-commit-validated configuration invariants. - Managed CI/CD pipelines (GitHub Actions and ArgoCD), Infisical-based secrets with automatic rotation, VPN-gated admin ingresses, Azure Bicep templates for multi-tenant AKS deployments, and SOC 2 and HIPAA compliance enablement.

- Optimized AWS costs for large-scale environments through resource analysis and efficiency measures. - Created CI/CD pipelines for new modules to streamline development and deployment. - Managed large-scale EKS clusters for high-availability Kubernetes operations. - Deployed new infrastructure components using Terraform and Terragrunt for scalable IaC.

- Deployed and managed AWS infrastructure using Terraform for scalable environments. - Automated QA happy paths for web apps and e-commerce platforms with Selenium. - Integrated Selenium into Jenkins pipelines, incorporating security tools like Nuclei, Pyraider, Gitleaks, and Trivy. - Combined Terraform with Ansible for full automation from IaC to server configurations. - Designed cloud-native solutions for web applications and games.

- Deployed and integrated SonarQube with GitLab and Jenkins CI/CD pipelines. - Deployed MEAN and MERN stacks using Docker and Ansible. - Managed Kubernetes environments on EKS and GKE. - Implemented Grafana and Prometheus dashboards for monitoring servers and Kubernetes clusters. - Built and maintained Jenkins CI/CD pipelines. - Deployed infrastructure using Terraform for scalable IaC. - Developed Bash scripts to automate routine tasks.