Role Overview

What is a Lead Infrastructure Engineer at SirenOpt?

As a Lead Infrastructure Engineer at SirenOpt, you are more than just an expert in infrastructure—you are a pivotal team leader and technical authority. You demonstrate mastery across multiple domains, guide your team through complex challenges, and elevate standards for both technology and collaboration. You are the go-to resource for high-impact projects, adept at capacity planning, load testing, and implementing critical security improvements, ensuring minimal customer impact even during high-risk maintenance. Your judgment is trusted, and your technical insight shapes major decisions and system architecture.

You set direction for your team, manage projects and resources with autonomy, and are sought out for technical and strategic guidance. You represent the infrastructure team in company-wide conversations, communicate clearly under pressure, and help others unblock their toughest problems. True leadership at SirenOpt means sharing credit for successes, accepting responsibility when things don’t go as planned, and focusing on developing others into leaders themselves. The greatest contribution you make is elevating those around you, building a strong, collaborative culture where people work with and for each other.

Key Responsibilities

• Lead the design, deployment, and ongoing improvement of our on-premises infrastructure, primarily built with Proxmox, Ceph, and open-source tooling
• Architect and maintain robust, scalable, and secure infrastructure solutions
• Oversee capacity planning, load testing, failover, and security hardening initiatives
• Guide strategic decision-making for tooling, processes, and infrastructure investments
• Manage and mentor a team of engineers, fostering continuous learning and professional growth
• Drive the hiring process for new team members, focusing on building a collaborative and high-performing team
• Develop and maintain automation with Terraform and Ansible for cluster and network management
• Lead incident response, root cause analysis, and remediation efforts with calm and clarity
• Represent the infrastructure team in cross-functional projects and company-wide discussions
• Continuously assess and improve operational procedures and documentation

Qualifications

• Deep experience managing on-premise clusters using Proxmox and Ceph
• Demonstrated expertise with infrastructure automation using Terraform and Ansible
• Strong background in network infrastructure design, implementation, and troubleshooting
• Proven ability to lead projects and teams, including hiring and mentoring engineers
• Experience with scaling, monitoring, failover, and disaster recovery for critical systems
• Track record of making strategic architectural decisions and communicating them effectively
• Exceptional communication skills under pressure and in cross-team environments
• Commitment to collaborative leadership, team development, and knowledge sharing

Nice to Have

• Experience supporting or leading ISO 27001 and SOC II compliance initiatives
• Familiarity with other virtualization and storage platforms
• Exposure to cloud and hybrid infrastructure environments
• Scripting or programming experience (Python, Bash, etc.)
• Prior participation in open-source infrastructure projects
• Experience building and maintaining infrastructure monitoring and alerting systems
• Background in developing infrastructure-related documentation and runbooks
• Involvement in technical community leadership or mentorship programs

It’s ok if you don’t check all the boxes in the qualifications. We hire for the capacity and the drive to learn and grow. If there is something that you haven’t done, but you are capable, please apply!

At SirenOpt, leadership means lifting others up, sharing credit, and taking responsibility. If you are passionate about building outstanding teams and products, and helping others achieve more than they thought possible, we’d love to meet you.