Senior Platform Engineer / Site Reliability Engineer (SRE)

About this role

WHO ARE WE Cognism is the leading provider of European B2B data and sales intelligence. Ambitious businesses of every size use our platform to discover, connect, and engage with qualified decision-makers faster and close more deals. Headquartered in London with global offices, Cognism’s contact data and contextual signals are trusted by thousands of revenue teams to eliminate the guesswork from prospecting. About Cognism Cognism is Europe's leading B2B Sales Intelligence platform, helping thousands of revenue teams make better commercial decisions through trusted, compliant and high-quality data.

As part of our engineering transformation, we are building a strategic Warsaw Engineering Hub that will become one of Cognism's two primary technology centres. About the Role As a Senior Platform Engineer / SRE, you will build and operate the cloud platform that enables Cognism engineering teams to deliver software safely, reliably and at scale. You will work at the intersection of cloud infrastructure, Kubernetes, developer experience, automation and operational excellence.

This is a hands-on engineering role where reliability is treated as a product and automation is the default approach. What You'll Do Design, build and continuously improve Cognism's cloud platform running on AWS. Develop Infrastructure as Code using modern automation practices. Build and maintain Kubernetes platforms supporting engineering teams globally. Improve deployment pipelines, CI/CD workflows and developer productivity.

Drive observability through monitoring, logging, alerting and distributed tracing. Participate in incident response, root cause analysis and reliability improvements. Partner with Engineering, Security and Architecture teams to improve platform resilience. Identify opportunities for cloud optimisation and FinOps improvements. Promote AI-assisted engineering practices for infrastructure and operations. Technology Environment AWS (EC2, EKS, IAM, VPC, RDS, S3 and supporting services) Kubernetes and Docker Terraform / Infrastructure as Code GitHub Actions or equivalent CI/CD tooling Observability platforms (Grafana, Prometheus, CloudWatch, OpenTelemetry) Linux and networking fundamentals What Success Looks Like Engineering teams