DevOps vs SRE: Understanding the Roles

Before diving into interview prep, you must understand what you're interviewing for. DevOps and SRE are related but distinct disciplines with different expectations.

DevOps Engineer Role

DevOps Engineers focus on automation and delivery pipelines:

Responsibility	Focus
CI/CD Pipelines	Build, test, deploy automation
Infrastructure as Code	Terraform, CloudFormation, Pulumi
Container Orchestration	Docker, Kubernetes
Configuration Management	Ansible, Chef, Puppet
Cloud Platforms	AWS, GCP, Azure

Key metrics DevOps owns:

• Deployment frequency
• Lead time for changes
• Mean time to recovery (MTTR)
• Change failure rate

Site Reliability Engineer (SRE) Role

SRE, pioneered by Google, applies software engineering to operations:

Responsibility	Focus
Service Level Objectives (SLOs)	Define and maintain reliability targets
Error Budgets	Balance reliability vs velocity
Incident Response	On-call, postmortems, runbooks
Capacity Planning	Predict and scale for demand
Toil Elimination	Automate repetitive operational work

Key metrics SRE owns:

• Availability (99.9%, 99.99%)
• Latency percentiles (p50, p99, p999)
• Error rates
• Saturation (resource utilization)

Role Comparison Matrix

Aspect	DevOps Engineer	SRE
Primary focus	Delivery pipelines	System reliability
Background	Often Ops → Dev	Often Dev → Ops
Coding intensity	30-50%	50-70%
On-call	Sometimes	Usually required
Typical salary (2026)	$130K-$220K	$150K-$280K

Hybrid Reality: DevOps/SRE

Many companies blend both roles. You'll see job titles like:

• "DevOps/SRE Engineer"
• "Platform Reliability Engineer"
• "Infrastructure Engineer"
• "Production Engineer" (Meta's term)

Interview tip: Ask clarifying questions about the role's focus during recruiter calls. "Is this more CI/CD focused or production reliability focused?"

Which Role Fits You?

Choose DevOps if you:

• Love building automated pipelines
• Enjoy rapid iteration and deployment
• Want to optimize developer experience
• Prefer breadth over depth

Choose SRE if you:

• Enjoy deep system debugging
• Want to write code that solves operational problems
• Are comfortable with on-call rotations
• Want to work on large-scale distributed systems

Next, we'll explore company tiers and what each expects from DevOps/SRE candidates. :::