Platform Engineering System Design and Interviews
Learn to prove your platform skills: finish the acme-shop paved road project, design internal platforms on a whiteboard, and prepare for interviews.
What You'll Learn
Understanding What Platform Interviews Test
A platform engineer at an acme-shop style company sits in a design review. The interviewer asks one question: "Your policy engine goes down at 2 AM.
Building Capstone Project 1: Extend the acme-shop Paved Road
Capstone Project 1 adds one new golden path to acme-shop's platform so that a product team can create a service that arrives deployed, guarded...
Building Capstone Project 2: Write a Platform Design Document
Capstone Project 2 is a written design for a multi-tenant platform serving 30 teams, with decision records, including build versus buy for the...
Building Capstone Project 3: Run a Reliability and Cost Review
Capstone Project 3 is a review of a messy namespace: find three problems, rightsize one workload, and propose SLOs.
Solving Platform Coding Tasks
Platform coding rounds are rarely puzzles. They are small, practical scripts and policies that check you can automate the cluster.
Walking Through Two System Design Questions
A system design answer is a short, structured conversation, not a monologue. The two walkthroughs below show the shape.
Skills You'll Master
Curriculum Index9 topics
Understanding What Platform Interviews Test
A platform engineer at an acme-shop style company sits in a design review.
Building Capstone Project 1: Extend the acme-shop Paved Road
Capstone Project 1 adds one new golden path to acme-shop's platform so that a product team can create a service that...
Building Capstone Project 2: Write a Platform Design Document
Capstone Project 2 is a written design for a multi-tenant platform serving 30 teams, with decision records, including...
Building Capstone Project 3: Run a Reliability and Cost Review
Capstone Project 3 is a review of a messy namespace: find three problems, rightsize one workload, and propose SLOs.
Solving Platform Coding Tasks
Platform coding rounds are rarely puzzles.
Walking Through Two System Design Questions
A system design answer is a short, structured conversation, not a monologue. The two walkthroughs below show the shape.
Practising Interview Questions by Level
Practise these aloud, not in your head. For each question, a strong answer is listed after the question.
Presenting Your Work
A strong project explained badly looks weak, and a modest project explained well looks strong.
Checking You Are Job-Ready
You are job-ready when you can build a platform piece, explain why you chose it, and say what breaks when it fails.
Career Impact
Roles that use the skills in this module.
DevOps Engineer
Site Reliability Engineer
Platform Engineer
Next Modules
Related Guides
Practice on the Coding Sheet
Not a software engineer sheet. Every problem comes from real DevOps, SRE, Platform and Cloud interviews, from your first script to a system you build yourself.
Open the Coding SheetFrequently Asked Questions
Most loops mix four things: Kubernetes depth, design judgment, a small coding or scripting task, and product thinking about developers as customers. Interviewers care less about tool trivia and more about whether you can explain a trade-off and what breaks when a component fails.
No. Every project in this module runs on the local platform-lab kind cluster built across the roadmap. Nothing here needs a cloud account or costs money.
One finished, well-documented project beats three half-finished ones. Capstone Project 1 is the one to polish first, because it touches every module on the roadmap and gives you the most to talk about.
Ask clarifying questions, state numbers and assumptions, draw a simple diagram, then walk through trade-offs and failure modes. A clear method matters more than matching a memorised answer.