Senior DevOps Lead: Enterprise Kubernetes & Cloud

Sigma Software; Warszawa; On-site; PLN 240,000 - 300,000; Full time

Job summary

Sigma Software is seeking a Senior/Lead DevOps Engineer to own technical decisions, lead platform delivery, and shape cloud and Kubernetes environments for government-grade infrastructure.

The role emphasizes architecture design, IaC, CI/CD automation, and strong collaboration with stakeholders in an international engineering setting. You will drive platform hardening, security, and scalable operations while mentoring the team.

Qualifications

• 5+ years of commercial experience as a DevOps Engineer in enterprise environments.
• Deep Kubernetes administration, networking, and security expertise.
• Experience with Infrastructure as Code tools such as Terraform.
• Hands-on in AWS and/or Azure cloud platforms.
• Experience implementing GitOps with ArgoCD or similar tools.
• Strong Linux administration and troubleshooting skills.
• Experience with CI/CD automation and software delivery pipelines.
• Knowledge of secrets management solutions such as OpenBAO or HashiCorp Vault.
• Experience with identity and access management solutions such as Keycloak.
• Understanding of infrastructure security, CIS benchmarks, and platform hardening.
• Experience working with production enterprise infrastructure environments.
• Ability to work independently and make technical decisions.
• Experience communicating with Customers and stakeholders.
• Strong analytical and problem-solving skills.
• Upper-Intermediate or higher level of English.

Responsibilities

• Design, implement, and maintain enterprise-grade Kubernetes platforms and cloud infrastructure.
• Lead infrastructure delivery activities from discovery to production rollout.
• Make architectural and technical platform decisions aligned with Customer requirements.
• Automate infrastructure provisioning and configuration management using IaC practices.
• Implement and maintain CI/CD pipelines and GitOps workflows.
• Configure and support secure cluster operations, secrets management, and platform hardening.
• Collaborate with Customers, vendors, and external stakeholders during technical workshops.
• Analyze existing infrastructure environments and identify optimization opportunities.
• Prepare technical proposals, implementation plans, estimates, and delivery roadmaps.
• Troubleshoot production environments and perform root cause analysis.
• Support compliance, security, and operational readiness requirements for government environments.
• Mentor engineers and contribute to technical leadership within the team.

Skills

Kubernetes

CI/CD

Linux administration

GitOps

AWS

Azure

Security hardening

Networking

English communication

ArgoCD

Tools

Terraform

Keycloak

HashiCorp Vault

OpenBAO

Job description

Sigma Software is seeking a Senior/Lead DevOps Engineer to own technical decisions, lead platform delivery, and shape cloud and Kubernetes environments for government-grade infrastructure.

The role emphasizes architecture design, IaC, CI/CD automation, and strong collaboration with stakeholders in an international engineering setting. You will drive platform hardening, security, and scalable operations while mentoring the team.