Infrastructure · Growing
Site Reliability Engineer: Skills, Projects & Interview Questions (2026)
Keep systems reliable and scalable through SLOs, automation and incident response.
What a Site Reliability Engineer actually does
Defining SLOs, automating ops, and leading incident response.
Top hiring companies: Google, Amazon, Meta, LinkedIn, Uber, Flipkart.
Top industries: Tech, Fintech, Cloud, E-commerce, Telecom.
Skills you need to become a Site Reliability Engineer
| Skill | Importance | Learning hours | Interview weight |
|---|---|---|---|
| Linux | 10/10 | ~50h | High |
| Monitoring & Observability | 10/10 | ~50h | High |
| Programming (Python/Go) | 9/10 | ~70h | High |
| Incident Management | 9/10 | ~30h | High |
| Kubernetes | 9/10 | ~70h | High |
| SLO/SLI/Error Budgets | 9/10 | ~30h | High |
| Cloud | 8/10 | ~60h | High |
| Automation / IaC | 8/10 | ~40h | High |
| Networking | 8/10 | ~40h | Medium |
| Distributed Systems | 8/10 | ~60h | High |
Core tools: Prometheus / Grafana, Kubernetes, Terraform, PagerDuty, Datadog, Python / Go.
Site Reliability Engineer learning roadmap
Beginner · 3-5 months
Foundations & core tooling
Build: Instrument an app with metrics/logs and a basic alert.
Intermediate · 5-6 months
Applied, real-world builds
Build: Define SLOs/SLIs, build dashboards and automate a runbook in Python/Go.
Advanced · 6-8 months
Production, scale & specialization
Build: Run incident management with error budgets across a distributed system at scale.
10 Site Reliability Engineer portfolio projects
App Instrumentation
BeginnerAdd metrics, logs and an alert.
Skills: Monitoring, Linux
Uptime Monitor
BeginnerHealth checks and alerting for a service.
Skills: Monitoring, Programming
SLO Dashboard
IntermediateDefine SLOs/SLIs and dashboards.
Skills: SLO/SLI, Monitoring
Runbook Automation
IntermediateAutomate a runbook in Python/Go.
Skills: Programming, Automation
Incident Response Drill
IntermediateSimulate and handle an incident.
Skills: Incident Management, Monitoring
Capacity Planning
IntermediateModel and plan capacity for growth.
Skills: Monitoring, Distributed Systems
Distributed Tracing
IntermediateEnd-to-end tracing across services.
Skills: Observability, Distributed Systems
Chaos Experiment
AdvancedInject failure and validate resilience.
Skills: Distributed Systems, Kubernetes
Error Budget Policy
AdvancedImplement error budgets across services.
Skills: SLO/SLI, Monitoring
Auto-remediation
AdvancedSelf-healing automation for common failures.
Skills: Automation, Kubernetes
Common Site Reliability Engineer interview questions
How do you diagnose disk or network issues?Medium
What they're testing: df/du, iostat, netstat/ss, ping/traceroute
The three pillars of observability.Medium
What they're testing: Metrics, logs, traces
List vs tuple vs set vs dict — when to use each.Easy
What they're testing: Mutability, ordering, uniqueness, key-value lookup
What are SLO, SLI and error budgets?Medium
What they're testing: Targets, measures, allowed unreliability
What problem does Docker solve?Easy
What they're testing: Consistent, portable, isolated environments
Compare IaaS, PaaS and SaaS.Easy
What they're testing: Control vs managed responsibility levels
What is infrastructure as code and why use it?Easy
What they're testing: Declarative, versioned, repeatable infra
What is HTTPS/TLS doing under the hood?Medium
What they're testing: Encryption, identity, integrity
Explain processes, signals and jobs.Medium
What they're testing: fg/bg, kill signals, daemons
How do you design effective alerts?Medium
What they're testing: Actionable, symptom-based, low-noise
What are mutable vs immutable types? Implications?Easy
What they're testing: Aliasing/side effects; default-arg pitfalls
How do you run incident management?Medium
What they're testing: Detect, mitigate, communicate, postmortem
Certifications for Site Reliability Engineers
- Certified Kubernetes Administrator (CKA)CNCF / Linux Foundation · Very High value
- AWS Certified Solutions Architect - AssociateAmazon Web Services · Very High value
- HashiCorp Certified: Terraform AssociateHashiCorp · Very High value
Site Reliability Engineer career path
SRE -> Senior SRE -> Staff SRE -> SRE/Infra Lead
Related roles: DevOps Engineer, Platform Engineer, Backend Engineer
Frequently asked questions
What skills do you need to become a Site Reliability Engineer?
Core skills include Linux, Monitoring & Observability, Programming (Python/Go), Incident Management, Kubernetes. Talk in SLOs/error budgets and show automation that cut toil.
What projects should a Site Reliability Engineer build for a portfolio?
Strong starter projects: App Instrumentation; Uptime Monitor; SLO Dashboard; Runbook Automation.
How long does it take to become job-ready as a Site Reliability Engineer?
A focused plan runs roughly 3-5 months for fundamentals, then applied projects. Difficulty rating: 8/10.
What is the career path for a Site Reliability Engineer?
SRE -> Senior SRE -> Staff SRE -> SRE/Infra Lead
Ready to become a Site Reliability Engineer?
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