Senior / Staff Platform & Backend Engineer | DevOps, SRE | Kubernetes, Terraform, AWS, Python, Rust

Senior / Staff Platform and Backend Engineer, 11 years of experience. Available immediately for 100% remote freelance projects. Based in Warsaw, Poland. I work in English and in German, after eight years living in Germany and one in Austria.

Roles: Platform Engineer, DevOps Engineer, Site Reliability Engineer (SRE), Backend Engineer, Cloud Engineer, Infrastructure Engineer, at Senior, Staff or Principal level.

Cloud and platform: AWS at depth (EKS, ECS, EC2, S3, VPC, IAM, Lambda, SQS, CloudWatch, multi-account organisations), Kubernetes, Amazon EKS, Helm, Docker, Istio, Knative, Terraform, CloudFormation, Infrastructure as Code, GitOps, Argo CD, GitLab CI, GitHub Actions, Jenkins, Linux, Bash.

Reliability and observability: SRE practice, SLOs and error budgets, incident response and on-call, post-mortems, Prometheus, Grafana, Loki, OpenTelemetry, Datadog, capacity and cost optimisation, blue/green and canary deployments.

Backend and data: Python (asyncio), Rust (Tokio, Axum, SQLx), PostgreSQL, REST and gRPC APIs, microservices, event-driven architecture, Apache Kafka, Apache Pulsar, streaming pipelines, delivery semantics, idempotency and replay, high-concurrency distributed systems.

AI and agents: autonomous agents in production, MCP (Model Context Protocol) servers and tools, agent orchestration and harnesses, AI-assisted development as daily practice. I self-host Hermes, an autonomous agent with an MCP integration that signs real documents.

Selected experience: most recently a freelance engagement at GVL in Germany, running three Amazon EKS clusters across a seven-account AWS organisation with Terraform and GitOps. Earlier at audibene in Germany, where I ran an Apache Pulsar migration, and at Hyperjet, where I built an on-chain indexer handling chain reorganisations and a vault on HyperEVM in Rust.

Working model: 100% remote only, no on-site work in Germany. Full time or part time. Available immediately.