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."
Model Direct-Sold DSP Orders
Design a data model for tracking a direct-sold demand order in a demand-side advertising platform. Context: - The platform manages advertiser demand a...
Optimal Commute: Nearest Transit Distance in a City Grid
This question evaluates a candidate's ability to apply multi-source breadth-first search to a grid-based shortest-path problem. It tests graph travers...
Lead a Project Retrospective Discussion
Lead a Project Retrospective Discussion Walk through a significant past project as a retrospective. Explain the hardest part, how the team addressed i...
Design a Distributed Metrics Counter
This question evaluates a candidate's competency in designing scalable, highly available distributed systems for real-time telemetry ingestion and agg...
Design a Distributed Cron Job Scheduler
Design a Distributed Cron Job Scheduler Design a distributed scheduler for recurring jobs, similar in scope to a workflow-oriented cron service. Users...
Design an Ad Frequency Capping System
Design a frequency capping system for an advertising platform. A frequency cap limits how many times a user can be shown an ad, campaign, line item, o...
Design cart management lifecycle service
Scenario You are designing the backend for an on-demand delivery app (restaurants and grocery). Users can create a cart, modify items from multiple de...
Group Strings By Anagram Signature
Given a list of strings, group the strings so that each group contains words that are anagrams of each other. Discuss both a sorting-based signature a...
Answer AI Safety Behavioral Prompts
You are preparing for the final "culture" / hiring-manager rounds of a Software Engineer interview at an AI-focused company (the context here is Anthr...
Reason About Endianness, Ring Buffers, and Stack Behavior in Firmware
Reason About Endianness, Ring Buffers, and Stack Behavior in Firmware You are reviewing low-level firmware that receives binary records, buffers them ...
Implement Timeout Refund Workflow
This question evaluates skills in deterministic workflow design, idempotency and retry-safety for external payment integrations, state-transition corr...
Design a Scalable and Polite Web Crawler
Design a Scalable and Polite Web Crawler Design a web crawler that begins from a set of seed URLs, discovers links, fetches eligible pages, and stores...
Design Music Search, Playlists, and Playback Controls
Design Music Search, Playlists, and Playback Controls Design the core application model and service interfaces for a music product. Users can search b...
Design a Real-Time Online Chess Platform
Design the backend for a globally distributed real-time chess platform supporting moves, spectators, clocks, reconnects, and failover. Define authorit...
Solve Tree Diameter and Palindromic Counts
This two-problem prompt evaluates proficiency in tree algorithms and recursion for computing longest paths in binary trees, along with string processi...
Design a Relational-to-DynamoDB Migration System
Design a production migration system that moves an existing e-commerce service from a relational database to DynamoDB with minimal downtime. Your desi...
Solve Grid Path and Unique Substring
This question evaluates algorithmic problem solving skills in grid traversal and stateful string processing, specifically testing understanding of pat...
Build a Trust-Aware BIN Database
Build a Trust-Aware BIN Database Implement process_bin_operations(operations) for an in-memory database of card-number prefixes. A prefix identifies a...
Measure Water Trapped Between Elevations
Measure Water Trapped Between Elevations Given a list of nonnegative integer elevations where each bar has width one, return the total number of unit ...
Fairly Distribute Money With Limits
This question tests practical algorithm design around greedy distribution with per-element constraints and iterative redistribution. It evaluates a ca...