Baidu's coding rounds are challenging, typically medium to hard LeetCode difficulty, with a strong emphasis on algorithms, graph theory, and dynamic programming. System design rounds for senior roles focus on large-scale distributed systems, often tailored to Baidu's AI/cloud infrastructure. Allocate 2-3 months for preparation, solving 150-200 problems with a focus on communication and edge-case handling.

Prioritize graph algorithms (DFS/BFS, shortest paths), dynamic programming, and tree/greedy problems, as these appear frequently. For system design roles, study scalability, caching, and databases, with additional focus on AI/ML system design given Baidu's business. Review past questions on LuoGu (Chinese platform) to identify recurring patterns and topics like search engines or recommendation systems.

Candidates often fail to verbalize their thought process clearly or skip testing edge cases during coding rounds. Others underestimate the behavioral 'Bar Raiser' round, neglecting Baidu's 16 leadership principles. Ensure you practice speaking aloud while coding and prepare structured examples using the STAR method for behavioral questions.

Demonstrate hands-on experience with large-scale systems or AI projects relevant to Baidu's domains like Apollo (autonomous driving) or ERNIE (large language models). Show genuine interest by asking insightful questions about their tech stack or recent engineering challenges. Highlight cross-team collaboration and ownership, as Baidu values impact beyond individual coding.

The process usually takes 4-6 weeks from application to offer, involving 4-5 rounds: coding, system design, Bar Raiser (behavioral), and hiring committee. Expect 3-7 days for feedback after each round, though delays are common due to high volume. If you haven't heard back after a week post-interview, a polite follow-up with your recruiter is appropriate.

SDE-1 focuses on coding implementation and learning system fundamentals; SDE-2 requires designing scalable services and owning project modules end-to-end; SDE-3 emphasizes architectural decisions, mentoring, and driving technical strategy across teams. Interview expectations escalate: SDE-1 is heavy on DSA, SDE-2 adds system design, and SDE-3 includes deep design and leadership scenarios.

Use LeetCode for coding (filter for Baidu-tagged problems), LuoGu for Chinese-specific questions, and Baidu's official tech blog for system design case studies. For behavioral preparation, study their leadership principles via Xangroups and practice with mock interviews simulating the Bar Raiser format. Supplement with 'Designing Data-Intensive Applications' for distributed systems concepts.

Baidu fosters a fast-paced, innovation-driven culture with an 'user-first, tech-driven' ethos, often involving long hours during critical product cycles. SDEs are expected to write high-quality, scalable code and contribute to open-source projects internally. Collaboration is key, with regular code reviews and a focus on continuous learning, especially in AI and cloud technologies.