JavaScript developer
Move from your first function to predictable service behavior and a tested HTTP API.
Your goal
Build the Expense API, reproduce a duplicate request, and explain which parts require durable storage.
Use each checkpoint as evidence: solve an exercise without the solution open, explain its edge cases, and revisit a failed concept the next day. Course completion records practice; it is not an accredited qualification.
JavaScript from zero
From your first instruction to a working expense summary. No setup or previous coding needed.
11 lessons · 99 minutes of guided material, plus project and revision time.
Open syllabus →JavaScript: dependable data and services
Bridge fundamentals and advanced systems with aggregation, search, retry budgets and idempotent events.
4 lessons · 115 minutes of guided material, plus project and revision time.
Open syllabus →JavaScript · Algorithm practice lab
Stacks, prefix sums, sweep-line ordering and dynamic programming with edge-case tests.
4 lessons · 100 minutes of guided material, plus project and revision time.
Open syllabus →JavaScript engineering patterns
Build a cache, order dependent jobs, retain async outcomes and reason about sliding windows.
4 lessons · 115 minutes of guided material, plus project and revision time.
Open syllabus →Node.js from a script to an API
Understand where JavaScript runs, then learn modules, async work, files, HTTP, validation and tests before building an API.
8 lessons · 161 minutes of guided material, plus project and revision time.
Open syllabus →Node.js · Build a working foundation
Six sequenced labs covering the framework’s core workflow, input boundaries, failure handling and a practical extension. Each includes code, expected behavior and a review checklist.
6 lessons · 195 minutes of guided material, plus project and revision time.
Open syllabus →Final review
- Demonstrate a working example and a deliberately failing case.
- Explain one design trade-off and the expected time and memory costs.
- State which checks ran automatically and which required manual review.
- Keep a short project README with setup steps, limitations and your next improvement.
Open your personal study plan to review weak concepts and schedule the next session.