Affirm
Senior
Build the platforms behind synthetic identities, test data, mocking, and load testing that let Affirm engineers ship with confidence
Affirm is hiring a Senior Software Engineer for the Test Enablers team within Developer Productivity, which builds platforms for synthetic identities, test data seeding, mocking, deterministic testing, and load testing in service of a 1,000-PRs-per-day scaling goal. This interview focuses on distributed platform/testing-infrastructure design, operational ownership (SLOs, alerting, runbooks), and driving ambiguous, cross-team technical work from design through rollout.
Step into this interview
Free · a live voice mock calibrated to this exact role
What this interview tests
- Test/developer-productivity platform design: synthetic identities, test data seeding, mocking
- Testing strategy: component, integration, contract, performance, and targeted E2E
- Load testing infrastructure and making it safe/repeatable in production-like environments
- Operational ownership: SLOs, dashboards, alerting, runbooks, incident readiness
- Driving ambiguous, medium-to-large technical projects end to end
- Cross-team influence via RFCs, ADRs, and technical specs
Common question themes
Describe a test data, mocking, or synthetic-identity platform you built and its architecture
How would you evolve a team away from E2E-heavy testing toward layered test strategies
Walk through a load-testing system you'd design to be safe and repeatable at scale
Tell me about an ambiguous technical project you drove from problem definition to operational ownership
How do you reduce false failures and improve CI signal quality
Describe how you've used RFCs or ADRs to align teams on a technical decision