Senior+ Software Engineer Interview Questions
Senior+ software engineer loops (E5/L5 and above) shift the center of gravity away from raw coding and toward system design and leadership. These questions were reported by candidates interviewing for senior+ SWE roles across top tech companies, so they reflect the real senior+ bar: open-ended design rounds where you're expected to drive the architecture and defend trade-offs, behavioral rounds that probe scope, ambiguity, and leading without authority, and a coding bar that stays high but matters less than how you reason about scale. There are 150+ real, recently reported senior+ SWE questions here, spanning coding, system design, and behavioral rounds. Most come with a detailed model answer, so you can see not just whether a senior+ response is correct but whether it operates at the right altitude.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"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."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Answer Staff-level leadership scenarios using STAR
Behavioral prompts (Staff/L6) Provide structured answers (e.g., STAR) for scenarios like: 1. Most important technical decision you drove: how you deci...
Compute dasher pay from deliveries
Given a list of delivery events for dashers (e.g., dasherId, pickupTime, dropoffTime, distance, tip, and optional bonuses) and a set of pay rules (e.g...
Design a secure ML data platform
System Design: Secure, Ethical, Multi‑Tenant ML Data and Inference Platform Context Design a cloud-based ML platform used by multiple internal product...
Review an existing architecture for risks
This question evaluates an engineer's ability to perform an architecture review, identifying imminent scalability, reliability, operability, and secur...
Print a binary tree as aligned text
Implement a function that prints (or returns) an ASCII layout of a binary tree. Requirements: - Each node has a string value (assume it contains no sp...
Debug distributed-system performance problems
You are asked: “If a distributed system has a performance problem (latency/throughput regression), how would you approach it?” Describe a practical, s...
Design device telemetry pipeline for real-time and batch
Design a distributed system that ingests telemetry from millions of devices and supports both: - Real-time analytics (near-real-time dashboards/alerts...
Implement User Sessionization From Event Stream
You are building a backend data-processing component that consumes a stream of newline-delimited JSON events. Each event represents a user sending a m...
Design aggregator for multiple downstream services
This question evaluates system-design and distributed-systems skills, focusing on microservice aggregation, fan-out/fan-in concurrency, fault toleranc...
Merge two sorted arrays in-place
You are given two integer arrays sorted in non-decreasing order, and two integers m and n: - nums1 has length m + n. The first m elements of nums1 con...
Defend a Schema Decision Through a Real Technical Challenge
Defend a Schema Decision Through a Real Technical Challenge Choose a system you worked on where the data model materially affected correctness, scalab...
Increment a Digit-Array Integer by One
Increment a Digit-Array Integer by One You are given a non-empty array digits in which each element is a single decimal digit (0-9). The array represe...
Quadtree for 2D Geospatial Points
Quadtree for 2D Geospatial Points Design and implement a point quadtree that stores geographic locations on a 2D plane and supports efficient axis-ali...
Highest Salary Using Java Streams
Highest Salary Using Java Streams You are given a list of Employee objects. Each Employee is a plain Java object (POJO) with the following fields: `ja...
Maximum Sum Skyline
This question tests algorithmic problem-solving with array optimization under a mountain (single-peak) shape constraint. It evaluates practical applic...
Design a Workspace Resource Manager
This question tests a candidate's ability to design and implement a tree-structured data model with efficient CRUD operations in memory. It evaluates ...
Find Maximum Eastbound City Visits and Parse CSV
The first problem evaluates algorithmic reasoning about ordering constraints and subsequence selection, testing skills in sequence algorithms, multidi...
Count Subsequences That Move Between Positions
Practice a Visa coding interview problem focused on count subsequences that move between positions. The prompt emphasizes edge cases, clean implementa...
Find Any Available Meeting Room
You are given multiple meeting rooms. For each room, the existing bookings are represented as a list of non-overlapping time intervals sorted by start...
Solve Subarray Sum and Local Minimum
Two coding problems were reported in the same phone-screen round: 1. Count target-sum subarrays. Given an integer array nums and an integer k, return ...