Senior/Lead DevOps Engineer

Sigma Software

22h

About The Position

Join a large-scale infrastructure modernization initiative focused on secure and enterprise-grade government platforms. We are looking for a Senior/Lead DevOps Engineer who is ready to take ownership of technical decisions, lead platform delivery, and contribute to complex cloud and Kubernetes environments. We at Sigma Software value engineering excellence, collaboration, and continuous improvement. You will have the opportunity to work on impactful public sector solutions, contribute to modern infrastructure transformation, and grow within an international engineering environment. The project is focused on building and maintaining secure enterprise infrastructure platforms for the public sector. The team designs, automates, and operates Kubernetes-based environments with strong emphasis on cloud infrastructure, platform hardening, Infrastructure as Code, and CI/CD automation. As part of the project, you will contribute to large-scale infrastructure modernization initiatives involving Kubernetes orchestration, GitOps practices, enterprise security solutions, and air-gapped deployment environments. The role includes active participation in technical discovery, architecture design, implementation planning, and stakeholder communication.

Requirements

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

Nice To Haves

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

Responsibilities

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