Principal Site Reliability Engineer

As the Principal Engineer championing Resiliency, you'll be the driving force behind how commercetools prepares for, responds to, and learns from operational incidents at scale. You'll own the discipline of resiliency end-to-end: mature incident management, strong operational visibility, data-driven process improvement, and organization-wide readiness for peak-traffic events.

What you'll do

• Build and champion intuitive, end-to-end processes for incident detection, response, communication, and postmortems across the company.
• Develop clear, real-time metrics, dashboards, and signals to track system health and incident trends.
• Use operational data to find process gaps, partnering with product engineering teams to fix them.
• Scale and lead the organization-wide readiness program for massive traffic spikes like Black Friday.
• Identify resilience gaps, collaborate with infrastructure/product teams on solutions, and turn ideas into concrete technical outcomes.
• Partner closely with engineering leadership, Staff Engineers, and domain-specific Principal Engineers.
• Drive organizational communication, documentation, and training around resiliency and operational excellence.

What you'll need

• 7+ years driving incident management/operational excellence; 5+ years leading org-wide resiliency and reliability initiatives.
• Proven track record of managing and scaling systems for high-stakes, multi-team operational events.
• Strong ability to analyze metrics to diagnose technical issues and measure process improvements.
• Ability to evaluate both technical bugs and the organizational/human dynamics behind them.
• Demonstrated success managing large-scale initiatives that span multiple engineering teams in an Agile environment.
• Fluent English with exceptional written and verbal communication skills.
• High self-awareness, strong customer focus, and passion for mentoring others.

What they offer

• Comprehensive health benefits for you and dependents, including access to OpenUp for mental health support
• Annual learning budget, self-paced learning platforms, language training, personalized coaching, and leadership programs
• Family Leave Plus with additional fully paid parental leave
• Equity participation program
• Hybrid work: 3 days per week in Berlin, Valencia, or London