L3 OpenStack Engineer (m​/w​/d

Make an impact with NTT DATA Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive.

Make an impact with NTT DATA Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive. We are seeking an experienced L3 Open Stack Engineer to provide senior-level engineering and operational support for enterprise Open Stack environments.

The role focuses on complex troubleshooting, control-plane operations, architecture validation, performance optimization, capacity planning, and the resolution of high-priority incidents. As a technical escalation point, you will guide L2 teams and contribute to the stability, scalability, and continuous improvement of cloud platform services.

• Provide advanced administration and engineering support for Open Stack cloud platforms.
• Lead complex troubleshooting and root cause analysis across Open Stack services and infrastructure components.
• Manage control-plane health, platform resilience, and operational readiness.
• Support multi-region and multi-availability-zone (AZ) environments, ensuring reliable and scalable service delivery.
• Validate architecture designs and provide recommendations for performance, capacity, and operational improvements.
• Act as an escalation point for critical incidents and complex operational challenges.
• Mentor and guide L2 engineers through advanced day-2 operational scenarios.
• Develop and maintain technical documentation, operational procedures, and best practices.
• Collaborate with infrastructure, Linux, Kubernetes, networking, and storage teams to ensure end-to-end platform stability.

• Extensive experience administering and supporting enterprise Open Stack environments.
• Strong expertise in Open Stack architecture, operations, and troubleshooting.
• Solid understanding of Linux systems, virtualization, networking, storage, and cloud infrastructure technologies.
• Experience with performance analysis, capacity planning, high availability, and platform resilience.
• Proven ability to resolve complex technical issues and lead incident response activities.
• Strong analytical, communication, and stakeholder management skills.

• Advanced Open Stack platform certification
• Red Hat Certified Architect (RHCA) or equivalent cloud-focused certification
• Certified Kubernetes Administrator (CKA)
• Certified Kubernetes Security Specialist (CKS)
• Additional Security, Network, Storage, or Compute infrastructure certifications are advantageous

• German language proficiency at minimum B2 level is mandatory.
• The role requires the ability to participate in technical discussions, incident coordination, service reviews, change management activities, and day-to-day communication with German-speaking stakeholders, customers, and operational teams.

• Applicants must hold Swiss citizenship.

• Winterthur area, Switzerland
• Candidates should be based in, or regularly available within the Winterthur region to support customer interactions, operational alignment, coordination with onsite and remote-hands teams, and participation in governance, escalation, and service review meetings as required.

NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world’s leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. Our consulting and industry solutions help organizations and society move confidently and sustainably into the digital future.

As a Global Top Employer, we have experts in more than 70 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is part of NTT Group, which invests over $3 billion each year in R&D.

NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category.