Stand Up Contract Testing for a Logistics Microservices Backend
Overview
What this challenge is about.
Analyze a logistics platform's breakage log, rank six service pairs, draft a narrow consumer contract, and set up Pact CI. Earn a verifiable certificate.
The scenario
FreightLens sells real-time container visibility to European freight forwarders, so a wrong or late shipment status is a customer-trust problem, not just an internal bug; its 18-service backend currently proves correctness only by booting everything together in one fragile shared staging environment.
The Brief
What you'll do, and what you'll demonstrate.
Replace the most brittle parts of a shared-staging integration test setup with consumer-driven contract tests across the six highest-pain service pairs so each service can verify its integrations in its own pipeline.
Earning criteria — what you'll demonstrate
- Translate operational pain data into a prioritized test-migration plan
- Design consumer-driven contracts that capture only real consumer dependencies
- Wire a Pact broker and deployment gate into a continuous-integration pipeline end to end
- Communicate a repeatable migration process so other teams can self-serve
- Reason about when contract tests should replace, not supplement, integration tests
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.
- Contract Testing
Apply contract testing to solve real industry problems and demonstrate production-level capability.
- Pact
Apply pact to solve real industry problems and demonstrate production-level capability.
- Microservices
Apply microservices to solve real industry problems and demonstrate production-level capability.
- Ci Cd
Apply ci cd to solve real industry problems and demonstrate production-level capability.
- Test Strategy
Apply test strategy to solve real industry problems and demonstrate production-level capability.
- Api Design
Design RESTful and GraphQL APIs that are intuitive, consistent, and well-documented.
Careers
Career paths this challenge builds toward
Completing this challenge demonstrates skills that transfer directly to these roles:
Backend Engineer
This challenge mirrors the daily reality of owning service boundaries: you design APIs other teams depend on and prove those dependencies hold without a fragile shared environment, exactly the contract-first discipline backend engineers apply when scaling a microservices platform.
This challenge sharpens
- contract-testing
- microservices
- api-design
Platform Engineer
Standing up a broker and a can-i-deploy gate that other teams self-serve is core platform work. You build the shared testing and release infrastructure that lets dozens of services ship independently, the leverage point platform engineers are hired to create.
This challenge sharpens
- pact
- ci-cd
- contract-testing
Test Automation Engineer
Choosing where contract tests should replace brittle integration tests, and codifying that into a repeatable playbook, is the strategic side of test automation: deciding what to test where, then making the decision scalable across an organization.
This challenge sharpens
- test-strategy
- contract-testing
- ci-cd