Overview
What this challenge is about.
Write a spec and refactor a B2B marketplace payments module in 5-8 commits, then earn a verifiable certificate.
The scenario
The marketplace (Series-B+ at USD 95M raised, regulated under MAS payment-services rules) cannot ship its requested escrow feature until the splitting module is safe to extend.
The Brief
What you'll do, and what you'll demonstrate.
Specify a critical 4,000-line payments module before refactoring it, and prove the refactor was safe with measurable metrics.
Earning criteria — what you'll demonstrate
- Write a precise specification using preconditions, postconditions, and invariants
- Use characterization tests to lock in legacy behavior before refactor
- Measure refactor success with concrete code-quality and flow metrics
- Sequence a refactor in small commits that stay green
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Aligned coursework coming soon.
Skills
Skills you'll demonstrate.
Each one shows up on your verified credential.
- Specifications
Apply specifications to solve real industry problems and demonstrate production-level capability.
- Refactoring
Apply refactoring to solve real industry problems and demonstrate production-level capability.
- Characterization Testing
Apply characterization testing to solve real industry problems and demonstrate production-level capability.
- Cyclomatic Complexity
Apply cyclomatic complexity to solve real industry problems and demonstrate production-level capability.
- Defect Analysis
Apply defect analysis to solve real industry problems and demonstrate production-level capability.
- Code Review
Apply code review to solve real industry problems and demonstrate production-level capability.
Careers
Career paths this challenge builds toward
Completing this challenge demonstrates skills that transfer directly to these roles: