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Stripe favors long realistic prompts in a full IDE — integration, debugging, refactor — over LeetCode-style algorithms. System design is grounded in payments and regulatory reality, and behavioral signals weigh ownership and written communication as heavily as raw technical depth.

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Mako Debug (Bug Bash)

Onsite debug round on the open-source Python Mako template engine. Candidates clone the repo, run failing tests, and locate/fix 2-3 bugs using an IDE debugger. Heavy emphasis on debugger fluency — print-based debugging usually loses signal.

SWE
MLE
debugging
code-reading
hard
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OJ Problems

practice in the online judge
151 total
Weekly Deployment Window SchedulerBusiness Account Data VerificationSix Degrees of Collusion - Risk ScoringSix Degrees of Collusion - Fraud Ring SizeSix Degrees of Collusion - Direct LinksCalculate Service FeesMatching Contacts by Email Domain and PreferencesDatacenter Router Command ProcessorIntegration: Review Assignment via Git Diff + CSV Owners (JGit)Debug: CSV Parsing Drops QuotesDebug: SnakeYAML Boolean-like Scalar ParsingPrompt-based AI Coding in HackerRankMulti-task regression with opposite-signed targets: normalize and train jointlyIntegration Exercise (High-Speed Coding)Email Notification SchedulerParse and Match Payment InvoicesAPI Integration: Fetch and Aggregate Data from REST API (PokeAPI practice)Email Log Processing / Grouping and SortingKYC Data ValidationImplement a Rule Parser and EvaluatorJava Debugging Round: Fix a Bug in a Real-World Open Source Repo (e.g., SnakeYAML)Bitfont Repository: Implement Decoders and Compose ThemPayment Reconciliation (Transactions Matching & Discrepancy Report)Transaction Fee with Status- and Type-specific RatesChat Billing (Compute Chat Usage Charges from Event Logs)Design a Registry with REGISTER and SET_HEALTHY Operations (Multi-part OA)Parse and Aggregate Records with Potentially Unknown FieldsIncremental Filtering and Transformation on Tabular User Records (Follow-up Chaining)Join Two Datasets by a Field (Inner/Left Join with One-to-Many and Optional Skipping)Bike Map (Multi-part Route/Graph Problem)

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