Senior DevOps Engineer (Platform Engineer)

Our ambition is to build a sustainable future through relentless innovation and global collaboration. You will be responsible for designing, building, and operating the internal developer platform that enables hundreds of developers and data scientists to deploy, operate, and scale their applications safely, securely and with minimal friction across a multi-account AWS environment with focus on Security, Standardization, Industrialization.

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. Our offices are located in London and Warsaw, serving clients worldwide from start-ups to large corporations.

• Experience with running and operating software in production at scale.
• Ability to build CI/CD pipelines allowing everyday releases.
• Knowledge of Git.
• Experience with cloud-based software architecture and solutions, cloud-native approach, cloud and network security.
• Ability to design scalable and highly-available architecture in AWS.
• Hands-on experience with container orchestration Kubernetes.
• Coding experience in Java and Kotlin.
• Experience in setting up monitoring and logging tools (Elk stack, Azure Insights, Kibana).
• Experience with Infrastructure as Code and automation tools (Terraform, Ansible, CloudFormation).
• Experience with API Gateways.
• Familiarity with design thinking methodologies.

• 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).
• Ensure secure east–west communication between workloads in different accounts.
• 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.
• Operate and evolve platform-wide logging, metrics, and tracing systems.
• Ensure operational standards for platform components.