How Lyft Interviews in 2026: Process, Questions & What They Score

1. 01

   Implement a Binary Search Tree.

   Node-based BST insert, search and delete, with recursion and edge cases like duplicates and empty trees.

2. 02

   Rotting Oranges (grid BFS).

   Multi-source BFS on a grid, advancing one minute per level and checking for unreachable cells.

3. 03

   Given an m x n grid representing a data center (empty racks, secure servers, compromised servers), compute how the compromise spreads using BFS.

   Multi-source BFS on a grid, expanding from every compromised cell one step at a time.

4. 04

   Meeting Rooms II.

   Interval scheduling with a min-heap or sweep line to find the most overlapping meetings.

5. 05

   Car Pooling.

   Interval sweep over pickups and drop-offs with a running capacity check.

6. 06

   Find overlapping reservations and the largest free gap.

   Sorting and merging intervals to find conflicts and the largest gap between bookings.

7. 07

   Rotate a linked list to the right by k places.

   Linked-list pointer work: find the length, reduce k modulo length, relink the tail to the head.

8. 08

   Sort a linked list by relinking its nodes without copying values into a second list.

   Merge sort on a linked list by splitting and relinking nodes in place, O(n log n) time.

9. 09

   Convert a sorted list into a balanced binary search tree.

   Divide and conquer on the middle element to build a height-balanced tree.

10. 10

    Determine whether a binary tree is a valid binary search tree (iteratively).

    Iterative in-order traversal with an explicit stack, checking values stay strictly increasing.

11. 11

    Given a large UTF-8 text file, write a program that prints the K-th non-empty line.

    Streaming a large file line by line in constant memory, skipping empty lines.

12. 12

    Give an example of a specific programming scenario where using separate processes is definitively better than multi threading.

    Process versus thread tradeoffs: memory isolation, crash containment and parallelism.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   Wrap a paginated third-party API so repeated fetch calls return the next requested items across page boundaries.

   Stateful wrapper design that tracks a cursor and handles page-boundary arithmetic.

2. 02

   Given a large list of transaction records (id, userId, amount, createdAt), implement paginated retrieval APIs.

   API design for paginated reads over large records, such as offset versus cursor pagination.

3. 03

   Implement a time-based key-value store supporting set(key, value, timestamp) and get(key, timestamp).

   Per-key timestamped history with binary search for the latest value at or before the query time.

4. 04

   Design an in-memory file system.

   Tree of directories and files with path parsing for operations like ls, mkdir and file reads.

5. 05

   Implement a command-driven in-memory key-value database.

   Line-based command parsing over hash-map storage, with clean and extensible command handling.

6. 06

   Design and implement a nested key-value store that supports set(path, value), get(path) and delete(path).

   Nested hash maps or a trie keyed by dot-delimited path segments for set, get and delete.

7. 07

   Write an object-oriented module from scratch that processes complex array transformations and validates input formatting.

   Object-oriented decomposition with input validation and testable classes under a time limit.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   Design a ride-sharing (cab-hailing) service.

   Geospatial indexing of live driver locations plus matching and dispatch; wording differs by source.

2. 02

   Design a real-time driver-rider matching service capable of indexing live driver location updates with high write frequencies.

   Geospatial index design that absorbs high-frequency driver location writes while serving matching queries.

3. 03

   Design a surge pricing engine that handles millions of events per second.

   Stream aggregation of supply and demand per geographic cell over time windows to set price multipliers.

4. 04

   Design a reservation and payment system for a parking garage.

   Data model and API design for reservations, with concurrency control against double booking and payment handling.

5. 05

   Architect a distributed caching and rate-limiting system to protect internal microservices from traffic surges.

   Cache placement and eviction plus distributed rate limiting, such as token bucket, to shed load.

6. 06

   Design a messaging app, focusing on login and keeping track of active conversations.

   Authentication flow plus tracking of active conversations and connection state across servers.

7. 07

   Design a mobile-first, globally available real-time chat system.

   Persistent connections, message fan-out for 1:1 and group chat, and multi-region delivery.

8. 08

   Design a production-ready web crawler.

   URL frontier, deduplication, politeness and fault tolerance in a distributed crawler.

9. 09

   Do you know about DynamoDB? What is it?

   Knowledge of a key-value NoSQL store: partition keys, consistency options and access patterns.

10. 10

    Tell me the exact sequence of internal events when a database query is dispatched and eventually resolved.

    Database internals: parsing, planning, execution and result return for a single query.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   What drives your interest in this position at Lyft?

2. 02

   Why do you want to work at Lyft?

3. 03

   Tell me about a time you uncovered a safety or quality issue and took ownership to fix it.

4. 04

   How do you balance shipping features quickly with maintaining engineering standards?

5. 05

   Describe a time when you had to balance delivering a feature quickly against accumulating technical debt.

6. 06

   Tell me about a project you owned from start to finish.

7. 07

   Tell me about a time something broke and you fixed it.

8. 08

   Tell me about a failure and what you learned.

9. 09

   Describe a project where you failed or missed key objectives.

10. 10

    Tell me about a disagreement with a teammate.

11. 11

    How do you handle situations where product requirements are ambiguous or rapidly changing?

12. 12

    Describe a time you unblocked someone who had been stuck for more than a day.

13. 13

    How do you think Lyft can improve the safety of its passengers and drivers, and what role do you think technology can play in this?