
Senior/Lead DevOps Engineer
Sigma Software · Warsaw, Masovian Voivodeship, Poland · Remote
- Software & SaaS
- 1,001–5,000 employees
- London
Strong hiring record · median 39 days open
All reasons
In its favour
- Still listed on the employer's own board
- Design, implement, and maintain enterprise-grade Kubernetes platforms and cloud infrastructure
- Lead infrastructure delivery activities from the discovery phase through production rollout
- Make architectural and technical platform decisions aligned with Customer requirements
- Automate infrastructure provisioning and configuration management using Infrastructure as Code practices
- Implement and maintain CI/CD pipelines and GitOps workflows
- Configure and support secure cluster operations, secrets management, and platform hardening
- Collaborate directly with Customers, vendors, and external stakeholders during technical workshops and solution discussions
- 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
- 5+ years of commercial experience as a DevOps Engineer in enterprise environments
- Deep expertise in Kubernetes administration, networking, and security
- Experience with Infrastructure as Code tools such as Terraform
- Hands-on experience with AWS and/or Azure cloud platforms
- Experience implementing GitOps practices using 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 directly with Customers and stakeholders
- Strong analytical and problem-solving skills
- Upper-Intermediate or higher level of English
WILL BE A PLUS
- Experience with OKD or OpenShift administration
- Experience with Ceph storage solutions
- Knowledge of Helm packaging and customization
- Experience with air-gapped environments and restricted infrastructure
- Experience with vSphere administration
- Experience delivering solutions to external hosting providers
- Background in government, eGov, or registry-based systems
- Understanding of compliance and operational requirements in public sector environments
PERSONAL PROFILE
- Strong ownership mindset and ability to lead technical initiatives
- Ability to work effectively in ambiguous and evolving environments
- Excellent communication and stakeholder management skills
- Structured and proactive approach to problem-solving
- Ability to prioritize tasks and manage multiple responsibilities
- Strong collaboration skills within distributed teams
- Leadership mindset with focus on delivery and quality
Skills
- Kubernetes
- Terraform
- AWS
- Azure
- Argo CD
- Linux
- HashiCorp Vault
- Keycloak
- OpenShift
- Ceph
- Helm
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