Senior Site Reliability Engineer

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

Job summary

Claranet limited is seeking a Site Reliability Engineer to join our team in Lisbon, Portugal. The role blends operational excellence with engineering projects to build reliable, scalable, and secure cloud platforms.

You will work on Azure-based infrastructure and Kubernetes environments, focusing on automation, observability, and continuous improvement of service reliability. Strong scripting and English communication are essential.

Qualifications

• Degree in Computer Science, Engineering or a related field, or equivalent practical experience.
• At least 4 years of experience in SRE, DevOps, Platform Engineering, Cloud Engineering or a similar role.
• Hands-on experience with Microsoft Azure, particularly compute, networking and storage services.
• Practical experience with Kubernetes; experience with AKS is an advantage.
• Experience with Terraform or another Infrastructure as Code tool.
• Familiarity with CI/CD practices and version control systems.
• Experience with monitoring, logging and alerting platforms such as Datadog, Azure Monitor, Prometheus, Grafana or equivalent.
• Good scripting skills in Bash, Python or PowerShell.
• Understanding of software development and deployment practices.
• Experience with .NET and/or Java, microservices or business applications deployed on Kubernetes is a strong advantage.
• Ability to troubleshoot complex technical issues in a structured and collaborative way.
• Good written and verbal communication skills in English.

Responsibilities

• Monitoring and maintaining cloud and Kubernetes platforms to ensure high availability and performance.
• Investigating and resolving incidents, conducting root cause analysis, and driving continuous service improvements.
• Designing, deploying, and managing scalable infrastructure in Azure.
• Managing Kubernetes environments, preferably with AKS (Azure Kubernetes Service).
• Developing and maintaining Infrastructure as Code using Terraform.
• Building and improving CI/CD pipelines and automating operational processes.
• Implementing observability solutions, including monitoring, logging, tracing, and alerting tools such as Datadog.
• Defining and tracking reliability and performance metrics (SLIs, SLOs, and error budgets).
• Collaborating with development and infrastructure teams to deliver reliable, secure, and maintainable platform solutions.
• Promoting DevOps, automation, knowledge sharing, and a culture of continuous improvement.

Skills

SRE

DevOps

Platform Engineering

Cloud Engineering

Azure

Kubernetes

AKS

Terraform

CI/CD

Datadog

Azure Monitor

Prometheus

Grafana

Bash

Python

PowerShell

.NET

Java

Education

Degree in Computer Science or Engineering

Tools

Terraform

AKS

Datadog

Azure Monitor

Prometheus

Grafana

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.

We are looking for a SiteReliability Engineer to join our team and help us build and operatereliable, scalable and secure technology platforms.

This role combinestwo complementary areas of work:

• 50% Operational Excellence: ensuring the smoothoperation of our platforms, responding to service requests and incidents,troubleshooting issues and continuously improving reliability.
  
• 50% Engineering & ImprovementProjects: designing and implementing automation, observability, infrastructure andplatform improvements that make our services more resilient and easier tooperate.
  

This role isresponsible for ensuring the reliability, performance, security, andscalability of cloud-based platforms, primarily in Azure and Kubernetes environments. The position combines operational support, infrastructureengineering, automation, and Site Reliability Engineering (SRE) practices.

Your responsibilities include:

• Monitoring andmaintaining cloud and Kubernetes platforms to ensure high availability andperformance.
  
• Investigating andresolving incidents, conducting root cause analysis, and drivingcontinuous service improvements.
  
• Designing, deploying,and managing scalable infrastructure in Azure.
  
• Managing Kubernetesenvironments, preferably with AKS (Azure Kubernetes Service).
  
• Developing andmaintaining Infrastructure as Code using Terraform.
  
• Building and improvingCI/CD pipelines and automating operational processes.
  
• Implementingobservability solutions, including monitoring, logging, tracing, andalerting tools such as Datadog.
  
• Defining and trackingreliability and performance metrics (SLIs, SLOs, and error budgets).
  
• Collaborating withdevelopment and infrastructure teams to deliver reliable, secure, andmaintainable platform solutions.
  
• Promoting DevOps,automation, knowledge sharing, and a culture of continuous improvement.
  

You must have:

• Degree in Computer Science, Engineering or a related field, orequivalent practical experience.
  
• At least 4 years of experience in SRE, DevOps, PlatformEngineering, Cloud Engineering or a similar role.
  
• Hands-on experience with Microsoft Azure, particularly compute,networking and storage services.
  
• Practical experience with Kubernetes; experience with AKS is anadvantage.
  
• Experience with Terraform or another Infrastructure as Code tool.
  
• Familiarity with CI/CD practices and version control systems.
  
• Experience with monitoring, logging and alerting platforms such asDatadog, Azure Monitor, Prometheus, Grafana or equivalent.
  
• Good scripting skills in Bash, Python or PowerShell.
  
• Understanding of software development and deployment practices.
  
• Experience with .NET and/or Java, microservices or businessapplications deployed on Kubernetes is a strong advantage.
  
• Ability to troubleshoot complex technical issues in a structuredand collaborative way.
  
• Good written and verbal communication skills in English.
  

We value:

• Experience with AWS or Google Cloud.
  
• Experience with .NET or Java application development.
  
• Knowledge of SLI/SLO frameworks, error budgets and incidentmanagement practices.
  
• Experience with distributed systems, APIs and cloud-nativearchitectures.
  
• Familiarity with security, networking and identity concepts inAzure and Kubernetes.
  
• Relevant certifications, such as:
  
• MicrosoftCertified: Azure Solutions Architect Expert