Plaid · Software Engineer (New Grad)
Plaid's new-grad loop is practical and integration-heavy, mirroring a company whose whole product is reliable APIs between banks and apps. Expect a coding round, an API/integration-flavored round, and often a debugging exercise on an unfamiliar codebase, with correctness and resilience valued over puzzle solving. Because Plaid brokers sensitive financial data across flaky third-party systems, interviewers care deeply about error handling, retries, and clean contracts. A behavioral round looks for pragmatism and reliability thinking.
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What this interview tests
- Practical coding against messy third-party APIs
- API and resource design (idempotency, pagination, versioning)
- Resilience: retries, backoff, timeouts, partial failure
- Debugging unfamiliar code from a failing test
- Data normalization and validation of untrusted input
- Pragmatism and data-privacy awareness (behavioral)
Common question themes
Implement retry-with-backoff against a flaky API
Normalize and validate inconsistent third-party data
Design a paginated, versioned resource endpoint
"What happens when the upstream bank API times out?"
Debug why an integration test fails in an unfamiliar repo
"Tell me about a time you handled a system you didn't control"
Modeled on a public Plaid new-grad SWE posting