Jan S.

Senior platform engineer with 24 years running production infrastructure. Ex-Head of Infrastructure & Architecture at two PCI-DSS Level 1 fintechs, now building AI platforms in production. I help companies: - Design and run AWS / Azure platforms on Kubernetes (EKS/AKS) with Terraform - Ship faster with GitOps (ArgoCD), GitHub Actions and safe blue-green/canary releases - Pass security and compliance audits (PCI-DSS, ISO 27001, GDPR) without slowing delivery - Run GPU and LLM workloads in production: inference, MLOps, cost control - Fix reliability: observability, alerting and incident response that cut MTTR Recent work: - Platform for an AI assistant serving 800,000+ users (Zellis) - Multi-cloud GPU inference at 99.95% uptime, inference costs down 20% (ColorTV) - PCI-DSS L1 card-issuing platform on AWS with zero audit findings (Flyfish) - HSBC's first cloud-native app, 99.99% uptime, delivered 3 months early Fast, clear communicator, comfortable owning a problem end to end. Send me a message with what you're working on.