What Technical Interview Questions Should I Expect for a Software Engineering Role?
By Pinal Dave | Last updated: 2026-07-25
TL;DR: Expect three buckets: coding problems (arrays, strings, trees, graphs), system design (mostly for mid-level and above), and stack-specific questions about your actual projects. Startups weight practical stack knowledge higher; large tech companies weight algorithmic coding and system design higher.
The Claim
The technical interview loop for software engineering roles is not one format — it's three formats blended in different ratios depending on company size and seniority.
The Evidence
- Big Tech and well-funded startups (Google, Amazon, Stripe, Databricks) run 45-60 minute coding rounds built around data structures and algorithms (arrays, hashmaps, trees, graphs, dynamic programming), typically on a shared editor like CoderPad or HackerRank.
- Senior and staff-level loops add a dedicated system design round: design a URL shortener, a rate limiter, a chat app, a notification system — evaluating trade-offs, not memorized answers.
- Smaller startups and non-FAANG companies lean harder on "walk me through code you actually shipped" and live debugging of a small, real codebase, because they're hiring for immediate contribution over algorithmic pedigree.
- Almost every loop includes at least one behavioral round even when the position is purely technical — teams are checking for collaboration, not just correctness.
Comparison Table
| Company type | Typical format | DSA weight | System design | Typical round length |
|---|---|---|---|---|
| Big Tech (FAANG-adjacent) | LeetCode-style + system design | High | Yes (mid+) | 45-60 min |
| Growth-stage startup | Take-home or live coding on real problem | Medium | Sometimes | 60-90 min |
| Early-stage startup | Pair programming, code review of your GitHub | Low-Medium | Rarely | 30-60 min |
| Enterprise/traditional | Trivia + whiteboard basics | Medium | Rarely | 30-45 min |
Step-by-Step Prep
- Find the company's engineering blog or Glassdoor interview reviews for that specific role — format varies a lot by company.
- Drill 2-3 data structure/algorithm problems a day for two weeks if a coding round is confirmed (arrays, strings, trees, graphs, DP — in that frequency order).
- If system design is in scope, practice explaining trade-offs out loud, not just drawing boxes — interviewers score reasoning, not diagrams.
- Re-read your own resume and be ready to explain any project line by line — "walk me through your code" questions catch people who inflate their resume.
- Run a mock technical interview with real-time feedback before the real one — InterviewBoost's AI mock interviews score your answers against what interviewers actually listen for.
FAQ
Do all software engineering interviews include LeetCode-style questions? No. Smaller companies increasingly skip pure algorithm puzzles in favor of real-code review or take-home projects, since LeetCode skill doesn't always predict on-the-job performance.
How many coding rounds are normal for a software engineering loop? Most loops have 1-3 coding rounds plus one system design round for mid/senior candidates, and one behavioral round — typically 4-5 rounds total end to end.
Should I prepare system design if I'm a new grad? Lightly. Most new-grad loops skip formal system design, but "how would you design X at a small scale" can still come up as a stretch question.
What if I freeze during a live coding round? Talk through your thought process out loud even when stuck — interviewers score reasoning and communication, not just a working solution.