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Hanna Marusych

@hannamarusych

Platform Engineer at Egencia building AWS and Kubernetes platforms, including self-service routing and daily production releases.

United States

Message

At Egencia — American Express Global Business Travel, I own the delivery path for 8 platform services, replacing manual per-environment deploys with a GitHub Actions, ECR, ArgoCD, and EKS flow that ships production releases daily. I also replaced hardcoded AWS credentials in CI/CD with Terraform-managed OIDC roles.

I built self-service Kubernetes routing and unified platform checks in Prometheus, Grafana, and Alertmanager. As part of the platform team, I migrated 4 ML model-serving workloads from AWS SageMaker to Amazon EKS, cutting monthly compute cost for the highest-traffic inference workload 66%; at FanDuel, I helped scale Kubernetes workloads for NFL season peaks and built self-service provisioning for live sports video channels.

Experience

Work history, roles, and key accomplishments

Current

DevOps Engineer, Platform Engineering

Current

Egencia

Nov 2023 - Present (3 years)

Owns the delivery path for 8 of the platform's 50 services, implementing a GitHub Actions to EKS flow and replacing manual deploys. Built self-service routing, unified observability, automated PR reviews with Claude Code, and migrated ML workloads to EKS, cutting compute costs by 66%.

AWS Kubernetes Terraform GitHub Actions ArgoCD Amazon EKS OIDC API Gateway ExternalDNS Cert Manager Prometheus Grafana AlertManager Claude Code MCP Jira Sagemaker

Cloud Engineer

FanDuel

Sep 2020 - Oct 2023 (3 years 1 month)

Scaled Kubernetes workloads for NFL season peaks and ran the AWS platform behind the betting product across 6 accounts and 12 clusters. Provisioned Redshift clusters and built self-service provisioning for live sports video channels.