Principal Infrastructure Security Engineer

Principal Infrastructure Security Engineer Location: Dublin, IE Ridgeline is hiring a Principal Infrastructure Security Engineer to set the direction for cloud and infrastructure security across every product line, account, and environment. You will define the architecture vision and the security invariants that guide engineering decisions, and you will be accountable for Ridgeline’s overall cloud security posture. You will work with Engineering, Product Management, and Technology leaders on cloud security trade-offs that carry business, regulatory, or reputational consequences.

You will also help build the team's technical culture and develop Staff-level engineers, so that its standards, detection frameworks, and architectural judgment last beyond any single project. We believe in a culture where security is everyone's responsibility and an integral part of our engineering philosophy. At Ridgeline, how we work matters as much as what we build.

Ridgeliners act like owners, choose growth over comfort, and communicate with transparency. We assume positive intent, bias toward action, and bring solutions—not just problems. We celebrate wins, learn from setbacks, and thrive in a resilient, collaborative, high-performing culture.

If this excites you, we’d love to meet you. You must be permitted to work in Ireland, including under EU work authorization, without the need for employer sponsorship. What You’ll Do Own the multi-year cloud security architecture vision and the security in