Senior Platform Engineer

About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position As a Senior Platform Engineer within Advanced Analytics, you will join the central AI team to build and operate the cloud infrastructure that powers AI-enabled solutions at global scale. You will work in a cross-functional environment with Backend Engineers, ML Engineers, AI Architects, and Platform Architects, taking hands-on ownership of the infrastructure layer — from Kubernetes clusters and CI/CD pipelines to observability systems and security controls. Key responsibilities • Implement and operate Kubernetes infrastructure (AKS): cluster lifecycle, networking, resource management, auto-scaling, and multi-tenancy patterns. • Build and maintain CI/CD pipelines using GitHub Actions and ArgoCD for automated testing, container builds, and GitOps deployments. • Develop Infrastructure as Code (Terraform, Bicep) to provision and manage Azure resources with consistency and auditability. • Operate container registries (ACR), artifact management, and image security scanning workflows. • Implement and maintain observability infrastructure: Azure Monitor, Application Insights, Prometheus, Grafana — including dashboards, alerting, and distributed tracing. • Manage async processing infrastructure: Celery workers, Redis queues, and workflow orchestration patterns supporting AI agent execution. • Implement platform security controls: network policies, pod security standards, Key Vault integration, RBAC, and private endpoint configurations. • Support database infrastructure: PostgreSQL management, backup/recovery, connection pooling, and performance tuning. • Create self-service tooling and templates that enable development teams to deploy and operate services with minimal friction. • Diagnose and resolve infrastructure issues across clusters, pipelines, and cloud services; perform root-cause analysis and implement preventative improvements. • Collaborate with Platform Architects, Backend Engineers, and ML Engineers to translate architecture designs into reliable infrastructure. Required Experience & Skills • 6+ years of professional experience in platform engineering, SRE, or DevOps roles; experience supporting AI/ML workloads is a strong plus. • Strong Kubernetes experience: cluster operations, networking (Ingress, network policies), storage, autoscaling, and troubleshooting. • Solid Infrastructure as Code experience with Terraform, Bicep, or equivalent tools. • Production experience with Azure cloud services: AKS, ACR, Key Vault, Azure Monitor, Virtual Networks, Private Endpoints, and Azure Policy. • Strong CI/CD experience: GitHub Actions (self-hosted runners, reusable workflows), ArgoCD, or similar GitOps tooling. • Proficiency in Python for automation, scripting, and tooling. • Experience with container security: image scanning, runtime security, network policies, and least-privilege patterns. • Experience with observability stack: Prometheus, Grafana, centralized logging, and alerting configuration. • Familiarity with async task processing: Celery, Redis, or equivalent message queue patterns. • Strong Linux systems administration and networking fundamentals. • Operational mindset with strong troubleshooting skills across infrastructure layers. • Hands-on proficiency with Claude Code as an active coding assistant for infrastructure scripting, automation, and tooling development. What we offer • Contract under Polish law: B2B or Umowa o Pracę • Benefits such as private medical care, group insurance, Multisport card • English classes available • Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) • Opportunity to work with excellent professionals • High standards of work and focus on the quality of code • New technologies in use • Continuously learning and growth • International team • Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️