Site Reliability Engineer (Middle)

Claranet limited; Lisboa; On-site; EUR 60,000 - 90,000; Full time

Job summary

Claranet limited in Lisbon seeks a Site Reliability Engineer (Middle) to drive reliability across services and enable product velocity through stability. You will design SLOs, architect observability, and lead disaster recovery planning on GCP and Azure.

Strong Kubernetes expertise and IaC with Terraform or Pulumi are required, along with incident leadership, self-healing automation, and mentoring of junior SREs.

Qualifications

• Hands-on experience operating production workloads on GCP and Azure.
• Advanced Kubernetes operations across multi-cluster environments.
• Strong knowledge of distributed systems reliability and failover.
• Experience with SLO-based monitoring and alerting.
• Infrastructure as Code with Terraform or Pulumi.
• Load testing with k6 or JMeter; chaos engineering experience.
• Secure operations including cert management and secrets rotation.
• Cloud architecture knowledge for multi-region DR and HA.
• Incident command and crisis management skills.

Responsibilities

• Design and document organisation-wide SLO frameworks and error budget policies;
• Architect observability for metrics, logs, traces and alerting, including SLO-based alerting and anomaly detection;
• Drive reliability engineering practices, including chaos engineering and load testing;
• Plan disaster recovery and deliver at least two DR plans with tested procedures;
• Contribute to infrastructure capacity planning and cost optimisation;
• Deliver complex automation projects and reliability workflows, including self-healing systems;
• Lead or support incident response as an escalation point for complex incidents; conduct reproducible investigations using evidence across services;
• Integrate diagnostic and AI-assisted tools into repeatable investigation and preventive reliability workflows, validating their outputs and measuring their effectiveness;
• Participate in architecture reviews with a reliability focus;
• Mentor Junior SREs in incident response, automation and responsible use of diagnostic tools;
• Prepare quarterly reliability reviews for leadership.

Skills

GCP

Azure

Kubernetes

Observability

Security operations

Terraform

Pulumi

JMeter

k6

Tools

Terraform

Pulumi

JMeter

k6

Job description

We're fast learners,hard workers, natural collaborators... and we Make Modern Happen!

Our ambition is tounlock the potential of our digital world so that organisations everywhere caninnovate and thrive securely.

We aim to achievethis goal by bringing together the world’s most talented people and the mostpowerful technologies, combining them to address our customers' challenges and tobuild something stronger together.

Right now, we arelooking for aSite Reliability Engineer ( Middle ) to drivereliability across multiple services and enable product velocity throughstability. You will develop organisation-wide SLO and error budget practices,improve observability and automation, and contribute to disaster recovery andreliability engineering. Hands-on experience operating production workloads onGCP and Azure is required.

Your responsibilitiesinclude:

• Design and document organisation-wide SLO frameworks and errorbudget policies;
  
• Architect observability for metrics, logs, traces and alerting,including SLO-based alerting and anomaly detection;
  
• Drive reliability engineering practices, including chaosengineering and load testing;
  
• Plan disaster recovery and deliver at least two DR plans withtested procedures;
  
• Contribute to infrastructure capacity planning and costoptimisation;
  
• Deliver complex automation projects and reliability workflows,including self-healing systems;
  
• Lead or support incident response as an escalation point forcomplex incidents; conduct reproducible investigations using evidence acrossservices;
  
• Integrate diagnostic and AI-assisted tools into repeatableinvestigation and preventive reliability workflows, validating their outputsand measuring their effectiveness;
  
• Participate in architecture reviews with a reliability focus;
  
• Mentor Junior SREs in incident response, automation and responsibleuse of diagnostic tools;
  
• Prepare quarterly reliability reviews for leadership.
  

You must have:

• Hands-on experience operating production workloads on GCP and Azure;
  
• Advanced Kubernetes operations experience, including multi-clusterenvironments, service mesh and observability;
  
• Knowledge of distributed-systems reliability, including consensus,replication and failure modes;
  
• Advanced monitoring experience, including SLO-based alerting,anomaly detection and tracing;
  
• Infrastructure as Code experience with Terraform or Pulumi,including reliability patterns;
  
• Load-testing and performance-engineering experience, including k6,JMeter or chaos engineering;
  
• Knowledge of database reliability, including replication, failoverand backup/restore strategies;
  
• Security operations experience, including certificate management,secrets rotation and patching;
  
• Cloud architecture knowledge covering multi-region, disasterrecovery and high availability;
  
• Experience designing diagnostic workflows, correlating evidenceacross services, evaluating AI-generated outputs, conducting reproducibleinvestigations and integrating safe automation;
  
• Incident command and crisis management skills;
  
• Strong cross-team collaboration, technical writing, mentoring andknowledge-sharing skills;
  
• A data-driven approach and the ability to balance reliability withdelivery velocity.