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Describe a project you are proud of

TikTokSoftware Engineer · Technical Screen
MediumSoftware EngineerTechnical ScreenBehavioral & Leadership

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This question evaluates technical leadership, ownership, system design, execution, collaboration, trade-off reasoning, and the ability to demonstrate measurable impact from a software project.

Prompt

Spend ~30 minutes walking the interviewer through a software project you are proud of.

What to cover

  • Problem & context: What was the user/business need? What constraints existed (time, latency, cost, compliance, team size)?
  • Your role: What you personally owned vs. what the team owned.
  • Technical design: Key architecture/design choices, data model/APIs, trade-offs considered, and why you chose your approach.
  • Execution: How you planned, broke down tasks, collaborated, handled uncertainty, and unblocked yourself/others.
  • Challenges: Biggest technical or organizational challenge and how you resolved it.
  • Results: Measurable impact (latency, reliability, cost, adoption, revenue, incidents reduced, etc.).
  • Reflection: What you would improve if you had more time and what you learned.

Follow-ups to expect

  • “What alternatives did you consider?”
  • “What would you do differently?”
  • “How did you validate correctness/quality?”
  • “How did you handle edge cases or failures?”