Hanna Marusych

Selected Work

Projects that show how I work.

A few examples of infrastructure, platform engineering, and cloud migration work. The goal is not just to list technologies, but to show the problems I solve with them.

01

EKS Cluster Migration — CloudFormation → Terraform

Migrated a team's live EKS cluster from a hand-created CloudFormation stack to Terraform with no meaningful downtime. Ran both clusters in parallel while validating networking, IAM, Kubernetes RBAC, ingress, monitoring, and CI/CD, then cut over application by application. Modernized to an IPv6-primary design with worker nodes in private subnets, removing per-node public IPv4s and the associated public-networking cost (verified before/after in AWS Cost Explorer).

TerraformAWSEKSKubernetesIPv6GitHub Actions
02

RouteBox — Cloud-Native Microservices Platform

A production-style logistics platform built as independent services on AWS: a customer-facing Shipments API (the authoritative shipment lifecycle), a carrier webhook ingestion service that validates and deduplicates events from UPS/FedEx/DHL/USPS, an OR-Tools route-optimization worker that runs as a scalable background process, and an internal ops console. All AWS infrastructure is provisioned with modular Terraform using environment separation and automated remote state — the focus is service decomposition and infrastructure-as-code, not a single monolith.

TerraformAWSMicroservicesDockerREST APIsCI/CD
03

Product Review System — 3-Tier App on AWS

A 3-tier web application on AWS where users add products and leave reviews: an Nginx-served frontend, a Python/Flask REST API, and a MySQL database. Containerized with Docker and designed for high availability and scalability, it demonstrates clean 3-tier separation, containerization, and cloud deployment end to end.

AWSDockerPythonFlaskMySQLNginx