Karol P.

I cut a streaming platform's AWS bill by 30% and made their deployments 4x faster. 15 years building backend systems and cloud infrastructure in Python: distributed services, message queues, Docker, and everything defined as code. WHAT I DO - Backend systems in Python: APIs, async services, ETL and data pipelines - Cloud infrastructure on AWS, Azure and GCP, defined in Terraform or CloudFormation - CI/CD pipelines from scratch: GitLab CI, GitHub Actions, Jenkins - Cloud migrations, including a full private-cloud-to-AWS rebuild - Cost audits and infrastructure optimisation - Monitoring that alerts you before your customers do: Prometheus, Grafana WHERE I HAVE DONE IT Streaming: sole DevOps engineer on an AWS video platform. 30% cost reduction, deployments 4x faster and fully automated, clean account decommissioning after migration. Cybersecurity: built a greenfield AWS environment for an intrusion detection product and migrated it off private cloud. All Terraform, later Terragrunt. Rebuilt microservices onto EMR, Fargate, Lambda and Step Functions. Moved the team from Jenkins to GitLab CI. Broadcasting: built the Python and Databricks ETL and ML pipeline for a recommendation engine, and migrated existing modules from Scala with no prior Scala experience. Open source: second-highest contributor by commits on counterparty-core, the Python reference client for a Bitcoin protocol layer used by wallets and exchanges. WHY IT MATTERS THAT I AM BOTH Most DevOps engineers cannot read your application code, and most backend developers cannot run your infrastructure. When a deploy breaks, I do not need to work out whose problem it is. I have shipped production Django, async services on gevent and asyncio, C and C++ on a 20-year-old game engine, and Terraform across three clouds. BACKGROUND MSc Informatics (Honours), University of Edinburgh. Started on a CERN openlab internship building security monitoring for the LHC Computing Grid. Winner of the Polish Olympiad in Informatics. Fifteen years in distributed, multinational teams, so remote and asynchronous work is normal for me rather than an adjustment. ---------------------- Message me with what is broken or what you are trying to build. I will tell you honestly whether I am the right person for it, and if I am not, I will usually know who is.