Backend Engineer

Capstone journey

One app · 12 guided projects · Beginner to Expert

Build one real app and carry it all the way to production.

You take the same app (Tradepost) through 12 projects, each one solving the pain the last left behind. By the end you have shipped a production-grade system, the kind of portfolio piece that gets interviews.

You start

Run it locally and speak HTTP to it

You finish

Ship the API and run it in production

Beginner3Intermediate4Advanced4Expert1

12 projects · ~77h of building · free to preview

Beginner3 projects

Intermediate4 projects

Advanced4 projects

Expert1 project

Capstone journey

Build one real app and carry it all the way to production.

Run it locally and speak HTTP to it

Model orders and money in Postgres

Design the contract: REST, errors and versioning

Authenticate machines with scoped API keys

Make writes safe: transactions, locks and idempotency

Emit events without losing them

Survive flaky upstreams: timeouts, retries and breakers

Stay fast at a million rows

Cache it, rate limit it, and shed load before it buckles

Build a test suite that catches regressions before customers do

Find out why it was slow before the merchant does

Ship the API and run it in production