Karol – AWS, GCP, Python

It's a UK-based company that provides an online, white-label ticketing platform for football clubs to sell match tickets, memberships, and related products digitally, replacing traditional paper ticketing.

• Led the migration of a legacy C# monolithic application from AWS EC2 to GKE with zero downtime.
• Designed and implemented secure production-grade GKE clusters for QA and production.
• Engineered self-hosted GitHub Actions runners on GCP, reducing build times and lowering costs.
• Established a CI/CD pipeline with automated testing, staged QA deployments, and gated production releases.
• Drove cloud cost optimization through resource rightsizing and workload tuning.
• Maintained GKE infrastructure and operational stability.
• Trained developers on cluster usage.

It's an AI-powered media intelligence platform that helps businesses track reputation, risks, and market trends by analyzing millions of news and regulatory sources in real time.

• Orchestrated the transition of 250+ applications from Amazon ECS to EKS, reducing vendor lock-in and improving autoscaling.
• Migrated legacy MWAA Airflow and distributed Step-Functions/CronJob Lambdas into a centralized Airflow and Argo Workflows stack on EKS.
• Designed and executed an EKS rightsizing initiative using CPU and memory metrics to reduce Kubernetes compute costs.
• Cleaned AWS infrastructure by deprecating obsolete routes, unused accounts, and legacy EBS snapshots and volumes.
• Acted as SecOps for compliance audits, security assessments, and vendor onboarding.
• Led a penetration testing initiative and implemented strict Kubernetes Network Policies.
• Led the migration from legacy Prometheus to a highly available Thanos-based observability stack on Kubernetes.
• Modernized onboarding documentation and updated Kubernetes interactive tutorials.
• Led a company-wide disaster recovery simulation and directed post-mortem analysis for critical incidents.

It's a digital health platform offering a free app and resources to help people with epilepsy track their condition and find better treatment.

• Architected and deployed enterprise-grade AWS infrastructure from the ground up as the sole DevOps Engineer.
• Designed networking architecture, IAM/SSO framework, ECS orchestration, and data platform foundations.
• Implemented multi-region infrastructure-as-code using Terraform Cloud.
• Automated CI/CD using GitHub Actions.

It's a greenfield Big Data infrastructure for the major British multinational biopharma company, focused on discovering and developing medicines and vaccines

• Delivered greenfield Big Data infrastructure.
• Architected scalable and secure data processing solutions on Azure.
• Implemented infrastructure-as-code using ARM Templates, Azure CLI, and PowerShell.
• Built automated deployment pipelines through Azure DevOps.