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      Software Engineer – C/C++ SDK Performance Optimization Interview

      Jul 3, 2026
      Anonymous interview candidate
      San Jose, CA
      No offer
      Positive experience
      Average interview

      Application

      I applied through a recruiter. I interviewed at TikTok (San Jose, CA) in Jul 2026

      Interview

      The process started with a recruiter screening to discuss my background, the role, and my experience with C++ and performance optimization. This was followed by a technical coding interview conducted on an online coding platform, where I solved algorithmic problems in C++ while explaining my approach and complexity analysis. The interviewer also asked follow-up questions about modern C++, memory management, multithreading, STL, and performance optimization techniques. The interviewers were professional, asked thoughtful questions, and encouraged discussion about trade-offs and design decisions throughout the process.

      Interview questions [1]

      Question 1

      Follow up questions based on coding question
      Answer question