Rippling Interview Questions
Practice 94 real Rippling interview questions for 2026. Rippling interview questions for Software Engineer and Machine Learning Engineer roles emphasize coding and system design first — coding & algorithms and system design are heavily represented, followed by software engineering fundamentals, behavioral and leadership prompts, and occasional machine-learning tasks. This collection is built for interview preparation with real questions from actual interviews and detailed-solution style practice. Expect interviews to evaluate coding fluency, system thinking, and product-minded backend design: recurring Software Engineer themes include interval and sequence-merging algorithms (balance trackers, billing/interval merges), payroll and driver-pay systems, hotel and booking system designs, scalable expense-violation processing and flexible rules engines, news-feed and delivery-billing architectures, and focused backend component design plus algorithmic problem solving. Machine Learning Engineer questions are rare but lean toward algorithmic implementation with tests (stack and interval problems). To prepare, prioritize timed medium-to-hard algorithm practice, end-to-end implementations with tests, system-design diagram drills focused on billing/HR workflows, and clear STAR stories that show ownership and product judgment.
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"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
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Find bounding boxes of connected houses
This question evaluates grid traversal and connected-component identification skills, specifically handling ragged 2D arrays, 4-directional adjacency,...
Track article votes and last three flips
Problem Design an in-memory data structure for voting on articles. Users can vote on an article with either: - Thumbs up - Thumbs down - No vote (user...
Compute median of two sorted arrays
You are given two sorted arrays of integers nums1 and nums2. - nums1 has length m, nums2 has length n. - Both arrays are sorted in non-decreasing orde...
Find median of two sorted arrays
You are given two sorted arrays of integers nums1 and nums2 in non-decreasing order. Let the lengths be m = nums1.length and n = nums2.length. Either ...
Build an Expense Policy Rule Engine
This question evaluates implementing rule-evaluation logic, data modeling for expense records and rule representations, operator semantics, and design...
Aggregate expenses by person, trip, and category
Problem You are given a list of expense records. Each record has: - employee_id (string) - trip_id (string) - category (string, e.g., MEAL, HOTEL, TRA...
Compute peak concurrent drivers in 24 hours
Given delivery intervals across multiple drivers, compute the maximum number of distinct drivers simultaneously active within the last 24 hours from a...
Compute peak busy dashers with overlaps
You are given delivery logs as (dasherId, startTime, endTime) with integer times, where endTime is exclusive. A single dasher may accept multiple orde...
Compute max simultaneous drivers last 24 hours
Given delivery intervals (driverId, startTime, endTime) already recorded, implement maxSimultaneousDriverInPast24Hours() that returns the maximum numb...
Design a music player with favorites cap
Implement an in-memory music player that supports: addSong(id, metadata), removeSong(id), play(id), pause(), next(), prev(), getNowPlaying(), queueSon...
Compute maximum simultaneous drivers
Given N driver online intervals [start_time, end_time) during a day, compute the maximum number of drivers simultaneously online at any moment. Handle...
Compute unique-dasher concurrency with tie-breaking
You are given N delivery assignments, each as (dasherId, startTime, endTime) with 0 <= startTime < endTime. A single dasher may hold multiple overlapp...
Implement stack and interval algorithms with tests
Implement three coding tasks and design your own unit tests for each. 1) Validate Bracket String with a Stack - Input: a string s containing only '(',...
Compute concurrent online drivers
Question Given each driver’s chronologically sorted delivery records, build an algorithm that, for a timestamp t, returns how many distinct drivers we...