practice a little every day, paws crossed ♡
Software Engineer Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
- 9403
- Questions
- 546
- Companies
- 11
- Topics
- 8
- Languages
Showing 5221–5250 of 5874 results
- StripeMediumSoftware EngineerParse Parent-Child Task Records and Render Them as a Connector Tree
A multi-part coding exercise that parses root and child task records, linked by parent identifiers, into a parent-child map and renders the hierarchy as a text tree with branch connectors for middle and last children. It tests careful reading of a long specification, robust tree building and exact output formatting.
Software Engineering FundamentalsTechnical Screen - StripeMediumSoftware EngineerParse and Format Arbitrarily Nested Tasks from CSV
Tests parsing RFC 4180-compliant CSV records containing hierarchical tasks and rendering an arbitrarily nested forest with proper tree line prefixes (`├── `, `└── `, and `│ `).
Coding & AlgorithmsTechnical Screentreerecursionstring-parsing - StripeMediumSoftware EngineerPlan bicycle routes on a city map
This question evaluates graph algorithms and pathfinding competencies, multi-criteria optimization and weighting, data structure selection, heuristic design, handling dynamic updates and closures, and correctness and edge-case reasoning for route planning.
Coding & AlgorithmsTechnical Screen - StripeMediumSoftware EngineerPrepare for Backend Parsing, API Integration, AI Coding, and Bug Fixing Rounds
Tests parsing structured text payloads, managing transactional state machines, and implementing strict idempotency semantics with robust error handling.
Software Engineering FundamentalsOnsiteParsingState MachineIdempotency - StripeMediumSoftware EngineerProcess Transactions and Compute Balances
This problem tests your ability to manage stateful account data, handle time-ordered transaction processing, and implement basic validation logic for financial integrity.
Coding & AlgorithmsTechnical ScreenSortingHash MapSimulation - StripeMediumSoftware EngineerProcess auth requests with fraud rules
This question evaluates a candidate's ability to implement stateful stream processing and event handling, including applying time-scoped fraud rules to authorization requests, maintaining chronological ordering, and producing verified outputs via unit tests.
Coding & AlgorithmsTechnical Screen - StripeMediumSoftware EngineerPropagate runtime ID across API requests
Implement a request interpolator that traverses nested request payloads and URLs to replace placeholder variables with runtime IDs while preserving native data types.
Coding & AlgorithmsTechnical ScreenRecursionString ParsingJSON - StripeMediumSoftware EngineerRebuild a Comment Thread From Flat Records and Draw It
Turn unordered reply records into a tree, then print it as an ASCII tree with exact branch connectors, and optionally collapse deep branches. Tests careful spec reading, tree building that doesn't depend on input order, and precise output formatting.
Software Engineering FundamentalsTechnical Screentreesparsingstring-formatting - StripeMediumSoftware EngineerReconcile Monthly Bank-Account Balances Across Two Datasets
Implement a reconciliation function that joins internal ledger balances with external bank statements for a target month, categorizing discrepancies while strictly distinguishing between missing records and zero balances.
Data Manipulation (SQL/Python)Technical ScreenData ManipulationHash TableAccounting - StripeMediumSoftware EngineerReconstruct a Pallet Repacking Lineage and Render It as a Branch Tree
Rebuild which warehouse pallets were repacked from which other pallets out of an unordered event log, then print the lineage as an indented tree with branch connectors. Tests careful spec-reading, tree construction independent of input order, and exact output formatting.
Software Engineering FundamentalsTechnical Screentreesgraphsparsing - StripeMediumSoftware EngineerRegister Data Centers and Route to the Nearest Healthy Region
Implement a stateful command processor to register data centers, update their operational health, and route incoming requests to the nearest healthy data center using the Haversine distance formula.
Coding & AlgorithmsOnline AssessmentDesignGeometryParsing - StripeMediumSoftware EngineerRender a GeoJSON Bike Ride with Markers and Alternating Paths via a Map API
An API integration exercise that reads a bike ride from a GeoJSON file, posts JSON map parameters to a static map rendering service, and saves the PNG it returns. The final part adds start and end markers and draws the route in alternating colors every ten segments, testing HTTP client usage, coordinate order and off-by-one grouping.
Software Engineering FundamentalsOnsite - StripeMediumSoftware EngineerRender a Sailing Voyage from GeoJSON with a Map Snapshot API
Parse a GPS voyage from a GeoJSON file, POST it to a map snapshot service, save the returned PNG, then add start and finish markers and color bands of fixed segment counts. Tests careful JSON navigation, coordinate order, binary HTTP handling, and off-by-one-free chunking.
Software Engineering FundamentalsOnsitehttpjsongeojson - StripeMediumSoftware EngineerRepair a Validator Whose Error Lists Leak None and Nest
Given a small schema-validation library and a failing golden-file diff, trace stray None values, nested error lists, and an inconsistent null-versus-[] result back to their source and fix each with a regression test. Tests root-cause debugging, return-type contracts, and safe flattening.
Software Engineering FundamentalsTechnical Screendebuggingrecursionpython - StripeMediumSoftware EngineerResolve user roles across account hierarchy
This problem tests your ability to navigate hierarchical structures (a tree of accounts) and perform efficient permission aggregation using set operations.
Coding & AlgorithmsTechnical ScreenGraphHash MapHierarchy - StripeMediumSoftware EngineerRestaurant Listing CSV Linter: Required, Length, Banned Terms, Overlap
Write a configurable linter for restaurant-listing CSV rows that reports missing fields, length violations, whole-word banned terms, and too-low or too-high word overlap between fields after normalization. Tests robust CSV parsing, text normalization, rule-driven design and edge-case thinking.
Software Engineering FundamentalsTechnical Screencsvstring-processingvalidation - StripeMediumSoftware EngineerReview a Production Pull Request and Calibrate Feedback to the Author's Seniority
A staff-level Stripe code review exercise: review a realistic production pull request, decide what blocks the merge, and write the actual comments. It tests review prioritization, scrutiny of tests and failure modes, comment severity labeling, and how you adapt the delivery of feedback for early-career versus senior authors.
Software Engineering FundamentalsOther - StripeMediumSoftware EngineerSchedule Welcome and Expiration Emails from Subscription Records
A programming exercise that turns customers' subscription records into a chronological schedule of lifecycle emails, such as a welcome email at the start and an expiration email at the end. It tests date arithmetic, deterministic ordering of same-day emails, and a rule design that makes new email types easy to add.
Software Engineering FundamentalsTechnical Screen - StripeMediumSoftware EngineerShow Senior Engineering Leadership Through a Past Project
Explain senior engineering leadership through real project scope, technical judgment, coordination, delegation, and supported outcomes.
Behavioral & LeadershipOnsite - StripeEasySoftware EngineerSpecify Proximity-Based Request Routing
Clarify proximity metrics, destination eligibility, tie rules, and capacity before designing a request-routing algorithm.
Software Engineering FundamentalsOnline Assessment - StripeHardSoftware EngineerSplit-Tender Payment Events with Gift Card Expiry, ZIP Surcharges and Refunds
Implement a payment event processor for split-tender retail purchases, where each charge spends a customer's gift cards before billing the rest to a credit card. It tests precise simulation: earliest-expiry card priority with lexicographic tie-breaks, ZIP-range surcharges on the credit card portion, refunds split between card and store credit, and exact output formatting.
Coding & AlgorithmsTechnical Screen - StripeMediumSoftware EngineerStaff Behavioral: Deciding With Incomplete Info, Stakeholder Alignment, Mentoring
Stripe staff-level behavioral prompts covering a difficult technical decision made with incomplete information, aligning stakeholders with competing goals, and mentoring engineers while scaling your technical influence. It evaluates judgment under uncertainty, influence without authority, and concise, impact-first storytelling.
Behavioral & LeadershipOther - StripeHardSoftware EngineerSubtract Blocked Periods from Allowed Deployment Windows
Compute available deployment windows by merging allowed and blocked half-open intervals, subtracting overlaps, and returning maximal sorted nonempty ranges.
Coding & AlgorithmsOnline Assessment - StripeHardSoftware EngineerTheme-Park Wristband Payments: Expiring Credits, Zone Fees, Refunds
Process a chronological log of theme-park wristband events that spend expiring ride credits before a linked card, apply per-zone card surcharges, and split refunds between the card and new store credit.
Coding & AlgorithmsTechnical Screensimulationevent-processinggreedy - StripeHardSoftware EngineerTransit Wallet Ledger: Expiring Vouchers, Zone Fees and Refunds
Process a stream of wallet events where purchases spend expiring vouchers in priority order before charging a card with zone-based fees, and refunds split between card and new store credit. Tests careful rule-by-rule simulation and integer money math.
Coding & AlgorithmsTechnical Screensimulationparsingsorting - StripeMediumSoftware EngineerValidate CSV Company Records for Missing Fields, Length, Forbidden Words and Overlap
Build a validator for a CSV of company records that flags missing fields, values outside length limits and forbidden words, then measures word overlap between fields while ignoring case, spacing and words such as LLC. It tests robust CSV parsing, text normalization, rule-driven design and edge-case testing.
Software Engineering FundamentalsTechnical Screen - StripeMediumSoftware EngineerValidate KYC CSV Records
Implement a KYC CSV record validator that parses customer records, normalizes fields, and validates tax IDs and owner name matches.
Coding & AlgorithmsTechnical ScreenStringsData ParsingRule Validation - StripeMediumSoftware EngineerValidate transactions with risk rules and reporting
Implement an end-to-end transaction validation pipeline that parses raw CSV records, evaluates behavioral fraud detection rules, and outputs a formatted fixed-width audit report.
Coding & AlgorithmsTechnical Screenstringsdata-parsingsliding-window - StripeMediumSoftware EngineerVerify business accounts with progressive KYC rules
Implement a multi-tier KYC verification function that validates business identity inputs against format requirements and an official registry using token-based normalization.
Coding & AlgorithmsTechnical ScreenStringsData ValidationParsing - StripeMediumSoftware EngineerWeekly Maintenance Windows Across Time Zones: Find Usable Slots
Combine recurring 'open' maintenance windows and 'blackout' periods, declared in different local time zones, into the next usable UTC slots after a notice period; tests interval merging, subtraction and week wrap-around.
Coding & AlgorithmsOnsiteintervalssortingtime-zones
Stripe