Overview
What this challenge is about.
Apply Hexagonal Architecture to a Payments Microservice. Advanced challenge in code. Writing production code that solves real engineering problems, earn a bl...
The Brief
What you'll do, and what you'll demonstrate.
Implement a payments settlement microservice in Hexagonal Architecture so that payment-network adapters are swappable and the domain logic is framework-free.
This is not a coding exercise. It is the work a software engineer does between a Jira ticket and a merged PR. That distinction matters to every hiring manager who has seen candidates solve LeetCode problems and none who have shipped production code under real constraints.
When you finish, you will have something most graduates do not: a real-world deliverable, verified by Ewance, that you can show to a hiring manager and say "I did this. Here is the proof."
Earning criteria — what you'll demonstrate
- Implement Hexagonal Architecture in a real microservice with framework constraints
- Define port contracts that survive adapter substitution
- Apply contract testing to prove adapter swappability
- Keep domain logic free of framework leakage in a Spring-Boot codebase
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Domain-Driven Design
Master · Software Engineering
Strong alignment
This challenge maps to Domain-Driven Design 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.
- Hexagonal Architecture
Apply hexagonal architecture to solve real industry problems and demonstrate production-level capability.
- Ports And Adapters
Apply ports and adapters to solve real industry problems and demonstrate production-level capability.
- Kotlin Programming
Apply kotlin programming to solve real industry problems and demonstrate production-level capability.
- Contract Testing
Apply contract testing to solve real industry problems and demonstrate production-level capability.
- Domain Modeling
Apply domain modeling to solve real industry problems and demonstrate production-level capability.
- Tactical Ddd
Apply tactical ddd 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: