Courses
The bank tells you what to rehearse. A course tells you what to learn first, and what only makes sense once you have. Each one runs as a sequence through a real part of the job, carrying the questions and concepts that belong beside it. Each course includes a public introduction and a free sign-in lesson. Premium covers the remaining lessons, including the advanced 2026 material.
Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.
The main path
Work these in order.DevOps Foundations: Trace and Explain a Service
Trace a request through Linux, networking and cloud permissions. Build a diagnostic script, size a small service and defend its operating boundaries.
- 01Read the host1/3 free
- 02Follow the request3
- 03Design cloud boundaries3
- 04Prove the operating contract3
Safe Delivery: Infrastructure, Pipelines and Kubernetes
Take a change from reviewed infrastructure through artifact promotion and Kubernetes rollout. Test identity boundaries, recovery paths and a Gateway migration.
- 01Define the change1/3 free
- 02Build a trusted pipeline3
- 03Control the rollout3
- 04Review and rehearse a release3
Incident Response and Reliability Engineering
Turn service objectives into alerts, investigate competing failure hypotheses and recover state safely. Finish with a timed incident and a reviewable follow-up plan.
- 01Measure user impact1/3 free
- 02Choose the next observation3
- 03Recover without losing evidence3
- 04Lead the incident3
Platform and AI Infrastructure: Capacity, Cost and Control
Design a supported developer platform, account for its costs and operate inference workloads. Practise GPU admission, model rollouts and bounded automation in 2026.
- 01Build a supported platform1/3 free
- 02Account for capacity3
- 03Operate model serving3
- 04Bound automation and defend the design3