Senior DevOps Engineer (Platform Engineer)

At Square One Poland we link IT experts with the business. With over 25 years of experience, we specialize in recruitment processes on a global scale. Despite years of experience, we still have a startup DNA and this is our advantage. Our offices are located in London and Warsaw, however, we can reach clients from all over the world, from start-ups to big worldwide corporations.

• Strong experience as a Platform Engineer / DevOps Engineer operating production systems at scale
• Proven +4 years hands-on expertise with AWS, especially multi-account environments and organizational governance
• Deep understanding of Infrastructure as Code, particularly Terraform (modules, state management, guardrails)
• Solid experience running and operating EKS and/or ECS in production
• Strong background in CI/CD, GitHub-based workflows, and secure deployment patterns
• Experience designing developer platforms and internal tooling for self-service and standardization
• Strong understanding of cloud security, IAM, SCPs, permissions boundaries, and secure networking
• Operational excellence mindset: monitoring, logging, alerting, SLOs, and incident handling
• In addition to infrastructure and operations, you have hands-on development experience
• Professional experience developing services in one or more of: Java / Kotlin (Spring Boot), Node.js / TypeScript
• Familiarity with modern API design, service runtime concerns, and container-based workloads
• Ability to read, debug, and contribute to application code when needed

• Build and maintain core platform components (SSO, Access Management, clusters, networking, CI/CD, observability).
• Own Terraform modules, baseline configurations, and guardrails for distributed teams.
• Design and evolve platform “golden paths” — secure defaults, templates, and standards.
• Maintain platform IaC (Terraform, modules, state design, multi-account governance).
• Integrate with team-owned CDK stacks through stable platform contracts.
• Lead evolution of platform abstraction layers and service catalogs.
• Design and manage multi-account AWS landing zone (Orgs, SCPs, permissions boundaries).
• Own developer onboarding patterns (IAM SSO access, automation, pipelines).
• Build safe cross-account deployment workflows (GitHub OIDC, least privilege).
• Design and operate ECS and EKS clusters used by hundreds of services.
• Establish best practices for container execution, networking, autoscaling.
• Manage central networking components (VPC, TGW, Route53).
• Provide self-service tools and templates for teams (pipelines, service definitions, actions).
• Abstract platform complexity to enable fast and safe deployments for all teams.
• Own documentation, workshops, patterns, and architectural guidance.

This is how we work, at the client's site