How hard are Big Tech software engineer interviews?

Difficulty varies by company — Google and Meta are generally rated 8-9/10, while companies like Microsoft and Amazon rate 7-8/10. The key challenge is combining data structures knowledge with system design thinking under time pressure.

Should I focus on LeetCode or system design?

For L3-L4 (junior/mid), LeetCode matters most (60-70% of evaluation). For L5+ (senior), system design becomes equally important. Balance both, but weight based on your target level.

What programming language should I use in coding interviews?

Use whatever language you're most fluent in. Python is popular for its conciseness, but Java and C++ work equally well. Interviewers care about problem-solving, not language choice.

Alibaba SDE系统设计面试攻略

阿里SDE系统设计面试不考炫技，考的是业务落地能力。大多数候选人把系统设计当成架构图竞赛，拼命画高并发、高可用的“完美系统”，殊不知面试官真正想听的不是“能不能撑住百万QPS”，而是“你怎么判断这个功能值不值得撑住百万QPS”。真正的系统设计不是技术推演，是资源分配决策——不是你有多能写代码，而是你有多懂业务优先级。

2026-05-04

FAQ

Q: How hard are Big Tech software engineer interviews?: A: Difficulty varies by company — Google and Meta are generally rated 8-9/10, while companies like Microsoft and Amazon rate 7-8/10. The key challenge is combining data structures knowledge with system design thinking under time pressure.
Q: Should I focus on LeetCode or system design?: A: For L3-L4 (junior/mid), LeetCode matters most (60-70% of evaluation). For L5+ (senior), system design becomes equally important. Balance both, but weight based on your target level.
Q: What programming language should I use in coding interviews?: A: Use whatever language you're most fluent in. Python is popular for its conciseness, but Java and C++ work equally well. Interviewers care about problem-solving, not language choice.