DevOps Portfolio Project: One App, Carried Through Every Step

Why the portfolio comes after Kubernetes

There is nothing new to build here, and that is the point. Since step 5, you have put one app on a server, in a container, behind a pipeline, on AWS, under monitoring and on Kubernetes. Each step added a layer to the same system. Now you package it so that a stranger can understand it.

One app also gives you better answers in an interview. With ten clones, you know each project for a day. With one, you can explain what broke in week 20 and how the design changed because of it.

What to learn, in order

1. Clean up the repo. Remove dead files and secrets, and make sure a new reader can find things. Someone will spend a few minutes here at most.
2. Get to a one-command deploy. Wrap your steps in one script or Makefile (a file of named commands). If a stranger needs you to explain a step, it is not finished.
3. Draw the architecture. Show the parts and how traffic moves between them. A simple diagram that matches the real system beats a fancy one that does not.
4. Write the decisions down. For each big choice, say what you picked, what you rejected and what would change your mind. This is the most useful part of the README.
5. Add your cost notes. Say what the setup costs per month on AWS and how you found out. Say what you would cut first.
6. Add your postmortems. Pick your two best from step 12. Real failures with clear fixes show more than a page saying that everything works.
7. Practice explaining it out loud. Talk through the system for 20 minutes without notes. Then ask a friend to push back on your choices.
8. Record a walkthrough. A short screen recording lets people see the project work without running it.

What goes in the README

Put these in order, and keep each one short:

• One sentence on what the app does, and one on what the project demonstrates.
• The architecture diagram.
• The commands to deploy and destroy it, with what you need installed first.
• Your decisions and tradeoffs, such as why a local Kubernetes cluster and not a managed one.
• What it costs, and what would have to change before it could take real traffic.
• Links to the postmortems and the video.

Be honest that this is a practice system with no real users. Listing what is missing, such as a second region or a tested failover, shows you know the difference.

What to skip for now

• More small projects. A second clone adds little that the first project does not already show.
• New tools you have not needed so far. You can add them at work, when a real problem calls for them.
• A personal website. A clear GitHub README does the job.
• App features, a nicer UI, and high availability that a practice app does not need.

Common mistakes

• Copying a tutorial and changing the name. Interviewers can often spot it within a few questions about why it was built that way. Your own failures and changes are what make it yours.
• A README that only lists tools. "Uses Docker, Terraform and Kubernetes" says nothing about your judgment. Say why you used each one.
• Leaving secrets in Git history. Deleting a file does not remove it from old commits. A key that was ever public needs to be replaced, not just deleted.
• Claiming scale you never had. Do not call a practice app "production" or invent traffic numbers. One follow-up question will expose it.
• Leaving it running and getting a bill. Keep your billing alarm from step 8 on, and run your destroy command when you finish.

Your project

This page is the project. Finish the steps above on your existing app, then ask someone who has not seen it to try your README. Fix each place where they get stuck. Next, take it to step 15, where it becomes the main thing on your resume.