Mission-Critical Systems Engineer (Linux/K8s/VoIP)

Frequentis; Wien; On-site; EUR 70,000 - 100,000; Full time

Benefits offered by this job

Home office

Lunch Bonus

Public transport ticket

Parking space

IT equipment

Onboarding program

Professional development

Mentoring trainings

Sabbatical option

Job summary

Frequentis in Vienna is seeking a senior IT professional to contribute to international projects delivering mission-critical voice systems. You will shape architectures, lead technical delivery, and collaborate with customers to implement high-availability IT solutions.

Required are 5+ years in IT/telecom, hands-on Linux/Kubernetes and cloud-native platforms, plus strong English and German. Travel up to 15% and customer-focused training are expected.

Qualifications

• Completed technical education in IT/related field.
• 5+ years in IT/software/telecom projects with a delivery focus.
• Knowledge of Linux, Kubernetes and cloud-native platforms.
• Experience with VoIP and real-time comms.
• Networking and observability fundamentals.
• Ability to train customers and partners.

Responsibilities

• Provide technical expertise in international projects for mission-critical voice systems.
• Architect and evolve highly available IT systems.
• Lead technically without managerial authority across teams.
• Coordinate architectures and interfaces with stakeholders.
• Serve as primary technical contact for customers.
• Analyze challenges and develop sustainable solutions.
• Turn concepts into high-performance field-ready systems.
• Perform roles across HQ and client sites as needed.

Skills

Linux

Kubernetes

Cloud-native platforms

VoIP knowledge

Real-time comms

IP networking

Observability tools

Technical training

Security/compliance

Certifications

English & German

Travel readiness

Education

Completed technical education (HTL, University of Applied Sciences or Technical University)

Job description

Frequentis in Vienna is seeking a senior IT professional to contribute to international projects delivering mission-critical voice systems. You will shape architectures, lead technical delivery, and collaborate with customers to implement high-availability IT solutions.

Required are 5+ years in IT/telecom, hands-on Linux/Kubernetes and cloud-native platforms, plus strong English and German. Travel up to 15% and customer-focused training are expected.