Tech
What is a SRE?
Complete job description for your hiring: role and missions, required skills, training, salary, and career paths
The Site Reliability Engineer (SRE) is a hybrid profile between software development and system administration.
Their role is to ensure the stability, performance, and reliability of production systems, while enabling teams to deploy quickly and safely.
It's a strategic role at tech companies where product availability is critical (SaaS, fintech, e-commerce, cloud, AI, etc.).
What is the SRE's role?
The SRE acts as a bridge between development and infrastructure teams.
They automate operations, monitor systems, and manage incidents to guarantee a high level of service.
Their main missions include:
- Oversee and harden systems in production (availability, latency, performance).
- Automate deployments and maintenance through CI/CD pipelines.
- Set up monitoring and alerting (Prometheus, Grafana, Datadog, etc.).
- Manage incidents: post-mortem analysis, action plan, continuous improvement.
- Optimize cloud costs and environment scalability.
- Collaborate with devs to design resilient systems "by design."
Why do companies need this role?
With the rise of cloud and distributed architectures, the SRE has become essential to service continuity.
They guarantee that applications run 24/7 without interruption or performance loss.
Companies hire an SRE to:
- Avoid costly outages.
- Improve the speed and reliability of releases.
- Better anticipate problems through observability and automation.
- Define measurable reliability objectives (SLAs, SLOs, SLIs).
What skills are needed for an SRE?
Technical skills:
- Cloud: AWS, GCP, Azure.
- Containerization & orchestration: Docker, Kubernetes.
- Infrastructure as Code: Terraform, Ansible.
- Observability: Prometheus, Grafana, ELK, Datadog.
- Scripting: Python, Bash, Go.
- Solid foundations in networking, security, performance, and distributed architecture.
Soft skills:
- Rigor and responsiveness in crisis situations.
- Ability to prioritize and automate.
- Team spirit and pedagogy.
- Taste for technical challenge.
What training is needed to become a Site Reliability Engineer?
- Engineering schools specialized in computer science, systems, or cloud computing.
- University Master's in infrastructure, networking, or cybersecurity.
- Cloud certifications: AWS Solutions Architect, Google SRE, Kubernetes CKA/CKAD.
Some SRE profiles also come from development or DevOps before specializing in reliability.
What is the salary of an SRE?
- Junior (0–3 years): 45–55K€
- Mid-level (3–6 years): 55–70K€
- Senior / Expert (7+ years): 70–100K€+, depending on infrastructure size and industry.
What career paths are possible?
An SRE can move into:
- Engineering Manager / Head of Infrastructure
- Cloud Architect
- DevOps Lead / Platform Engineer
- CTO in tech-heavy organizations.