Coding & Algorithms interview questions

Showing 2761–2790 of 3276 results

• Find Weekly Deployment Windows Across Time ZonesHard

  Determine the first k non-overlapping deployment windows across a 3-week search horizon by mapping weekly recurring local allow and freeze rules into a repeating UTC timeline.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Find deployable slots in a recurring week from allowed and freeze windowsMedium

  A coding exercise on a recurring 10,080-minute week: combine allowed and freeze deployment windows into deployable slots, then add per-window time-zone offsets, the current time, a lead time, a minimum slot length and a cap of k results. It tests interval merging and subtraction, wrap-around at the week boundary and careful edge-case handling.

  StripeSoftware EngineerCoding & AlgorithmsOnsite
• Find linked merchants by shared fieldsMedium

  This question tests the ability to model entity relationships using a graph representation and implement a traversal algorithm to identify connected components based on shared identity fields.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Find linked user records by similarityMedium

  This question evaluates the ability to compute weighted field-based similarity and reason about adjacency relationships in an undirected graph, testing competencies in similarity scoring, record linkage, and basic graph traversal.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Find linked user records by weighted similarityMedium

  This problem tests your ability to model relationships as a graph and compute connected components based on weighted similarity scores between user records.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Generate Available 30-Minute Time SlotsHard

  This problem tests your ability to manipulate time intervals, handle recurring weekly schedules, and perform intersection logic between availability windows and existing booked appointments.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• How to find the cheapest flight within K stopsMedium

  This problem tests your ability to find the shortest path in a weighted graph under a specific constraint on the number of edges (stops).

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• How to settle multi-person debts in minimum transactionsMedium

  Tests algorithm design and combinatorial search to settle multi-party debts with the minimum number of transfer transactions.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Implement Billing Coding ExercisesMedium

  Implement a subscription proration and billing reconciliation engine that generates line items across plan changes and computes the outstanding balance against posted payments.

  StripeSoftware EngineerCoding & AlgorithmsOnsite
• Implement JSON parsing and HTTP integration tasksMedium

  Tests practical software engineering skills in parsing JSON data, constructing batch HTTP requests, mapping returned attributes (such as color codes to coordinate points), and handling API errors.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Implement Validation and String CompressionHard

  This problem tests your ability to design a custom parser and recursive string processor that handles nested patterns while enforcing strict input validation.

  StripeSoftware EngineerCoding & AlgorithmsOnsite
• Implement a Datacenter Request RouterMedium

  This problem tests the ability to manage stateful datacenter metadata and implement a routing algorithm that prioritizes proximity (Haversine distance) while respecting capacity constraints.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Implement bitmap font render/compress/invertMedium

  This problem tests your ability to manipulate 2D bit arrays, implement Run-Length Encoding (RLE) for data compression, and perform grid-based coordinate transformations.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Implement multi-network card validator with LuhnMedium

  This question evaluates a candidate's ability to implement and reason about the Luhn checksum, multi-network payment card format validation, combinatorial completion for redacted digits, single-error correction models, and efficient search/pruning with deterministic duplicate avoidance.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Implement multi-part cost calculatorMedium

  This question evaluates a candidate's ability to implement robust data-processing and numeric computation logic for a multi-part cost calculator, covering input validation, per-item discounts and tax, sorting semantics, multi-currency conversion, and precise monetary rounding.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Implement stateful connection router simulatorEasy

  This question evaluates design and implementation skills for a stateful connection router, focusing on round-robin load distribution, connection lifecycle handling (duplicate connects, disconnects, shutdowns), and per-target capacity and mapping management.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Implement streaming per-user reservoir samplingMedium

  This question evaluates a candidate's competency in streaming algorithms, per-user reservoir sampling, probabilistic reasoning and proof of correctness, concurrent/distributed merging, and engineering trade-offs for memory and amortized update efficiency.

  StripeData ScientistCoding & AlgorithmsTechnical Screen
• Match payments to invoices by memo or amountEasy

  This question evaluates string parsing, record linkage, and algorithmic matching skills for data reconciliation tasks, including handling messy memo text, exact amount matches, and tie-breaking by earliest due date.

  StripeData ScientistCoding & AlgorithmsTechnical Screen
• Match payments to invoices with fallback rulesMedium

  This problem tests the ability to implement a multi-pass matching algorithm that prioritizes exact identifier matches before applying fuzzy numeric heuristics.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Minimize total factory cost with distance penaltiesMedium

  This problem tests your ability to use dynamic programming to minimize a total cost function that incorporates both intrinsic production costs and location-based transition penalties.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Parse and Format Arbitrarily Nested Tasks from CSVMedium

  Tests parsing RFC 4180-compliant CSV records containing hierarchical tasks and rendering an arbitrarily nested forest with proper tree line prefixes (`├── `, `└── `, and `│ `).

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Plan bicycle routes on a city mapMedium

  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.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Process Transactions and Compute BalancesMedium

  This problem tests your ability to manage stateful account data, handle time-ordered transaction processing, and implement basic validation logic for financial integrity.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Process auth requests with fraud rulesMedium

  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.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Propagate runtime ID across API requestsMedium

  Implement a request interpolator that traverses nested request payloads and URLs to replace placeholder variables with runtime IDs while preserving native data types.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Register Data Centers and Route to the Nearest Healthy RegionMedium

  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.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Resolve user roles across account hierarchyMedium

  This problem tests your ability to navigate hierarchical structures (a tree of accounts) and perform efficient permission aggregation using set operations.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Split-Tender Payment Events with Gift Card Expiry, ZIP Surcharges and RefundsHard

  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.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen
• Subtract Blocked Periods from Allowed Deployment WindowsHard

  Compute available deployment windows by merging allowed and blocked half-open intervals, subtracting overlaps, and returning maximal sorted nonempty ranges.

  StripeSoftware EngineerCoding & AlgorithmsOnline Assessment
• Theme-Park Wristband Payments: Expiring Credits, Zone Fees, RefundsHard

  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.

  StripeSoftware EngineerCoding & AlgorithmsTechnical Screen