Overview
What this challenge is about.
Tag 12 N+1 incidents, refactor Timesheets with Repository and Unit-of-Work patterns, then measure query performance. Earn a verifiable certificate.
The scenario
The HR-tech company (Series-B at EUR 30M raised, growing 70 percent year-over-year) has database costs growing faster than headcount because N+1 queries are eating the warehouse — the CTO needs an architecture answer, not more indexes.
The Brief
What you'll do, and what you'll demonstrate.
Refactor one EF Core bounded context to Repository + Unit-of-Work and measurably cut query count and p95 latency on critical queries.
Earning criteria — what you'll demonstrate
- Apply Repository + Unit-of-Work patterns to a real EF Core codebase
- Design specifications that let repositories stay aggregate-scoped
- Measure query performance before/after with concrete numbers
- Hand off a refactor pattern to other bounded contexts
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Software Design and Design Patterns
Master · Software Engineering
Strong alignment
This challenge maps to Software Design and Design Patterns at the Master level. It sharpens the same practical skills your coursework expects — but in a real industry context with actual constraints and deliverables.
Skills
Skills you'll demonstrate.
Each one shows up on your verified credential.
- Repository Pattern
Apply repository pattern to solve real industry problems and demonstrate production-level capability.
- Unit Of Work
Apply unit of work to solve real industry problems and demonstrate production-level capability.
- Design Patterns
Apply design patterns to solve real industry problems and demonstrate production-level capability.
- Refactoring
Apply refactoring to solve real industry problems and demonstrate production-level capability.
- Performance Tuning
Apply performance tuning 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.
Careers
Career paths this challenge builds toward
Completing this challenge demonstrates skills that transfer directly to these roles: