Google Senior Software Engineer Interview Questions
6 real practice questions for the senior-level Senior Software Engineer role at Google (Technology), spanning behavioral, technical, system design, and leadership. Lead technical projects and mentor junior engineers. The first 3 questions below include what Google interviewers actually listen for, plus likely follow-ups.
- Questions
- 6
- Categories
- Behavioral (2), Technical (2), System Design (1), Leadership (1)
- Difficulty mix
- 2 medium · 4 hard
- Avg. answer time
- ~4 min
Behavioral Questions (2)
1.Tell me about a technical decision you made that you later regretted. What did you learn?
hard~3 minWhat interviewers look for
- Honest acknowledgment of the mistake
- Shows ownership and accountability
- Explains what they learned from it
- Describes how they apply that learning now
- Shows humility and growth mindset
Likely follow-ups
- How did you communicate the mistake to stakeholders?
- How do you make technical decisions differently now?
Company context
At Google, intellectual humility is valued. The best engineers learn from their mistakes.
2.Describe a time when you led a technical initiative that required buy-in from multiple teams.
hard~3 minWhat interviewers look for
- Shows ability to influence without authority
- Demonstrates clear communication of technical vision
- Handled objections and concerns effectively
- Achieved alignment and successful execution
- Built consensus across different perspectives
Likely follow-ups
- How did you handle teams that were initially resistant?
- What would you do differently next time?
Technical Questions (2)
3.Implement LRU Cache with O(1) get and put operations. Explain your design choices.
medium~3 minWhat interviewers look for
- Uses hash map + doubly linked list combination
- Correctly implements get and put with O(1) time
- Handles edge cases (capacity 0, duplicate keys)
- Clean, readable code structure
- Discusses thread-safety considerations
Likely follow-ups
- How would you make this thread-safe?
- How would you implement LFU (Least Frequently Used) instead?
4.How would you design a global-scale distributed database?
hard~4 min
System Design Questions (1)
5.Design a real-time collaborative document editing system like Google Docs.
hard~5 min
Leadership Questions (1)
6.Tell me about a time when you had to make a trade-off between shipping quickly and code quality.
medium~3 min