Tiktok Software Engineer System Design Interview Questions
Master your tech interview with our curated database of real questions from top companies.
Explain Your System Architecture
System Design Interview: End-to-End Architecture Deep Dive Task Explain the end-to-end architecture of a production system you built or can credibly d...
Improve and measure service performance
Assessing and Improving a Service’s Performance Under High Load Context You are responsible for a user-facing, stateless HTTP microservice that handle...
Design tables from metrics
Data Modeling Design Task: Short‑Video Social App Analytics You are designing an analytics data model for a short‑video social application. The app su...
Design a high-concurrency ticketing system
Design a High-Concurrency Ticketing/Flash-Sale System (Limited Seats) Context You are designing the backend for a limited-seat flash sale (e.g., conce...
Explain SRE architecture and troubleshooting scenarios
Kubernetes, Reliability, and Data Store Concepts (Technical Screen) Context: Assume you operate a high-scale, latency-sensitive microservices platform...
Design and explain your project architecture
System Design Walkthrough: Short-Video Upload, Processing, and Delivery Context You recently built a system that lets users upload short videos, proce...
Explain multithreading and locks
Multithreading, Locks, Concurrency Hazards, and a Bounded Queue Design Context: Technical screen for a software engineering role. You are asked to dem...
Design a high-volume ticketing system
Design a High-Spike Ticket Purchasing Platform Context A popular concert sale can trigger sudden spikes of up to millions of requests per second (RPS)...
Design a global notification service
System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification platform that delivers real-time and sc...
Deep-dive your recent project architecture
End-to-End Project Architecture Walkthrough (Technical System Design) Provide a structured walkthrough of a recent system you built or led. Cover both...
Implement and compare key design patterns
Implement Core GoF Patterns in Java and Discuss Trade-offs Context You are designing a small Java library and want to demonstrate three classic GoF de...
Explain Kafka architecture and reliability semantics
Kafka Architecture and End-to-End Semantics You are asked to explain Kafka's core architecture and how to design for reliability and throughput in a p...
Design overload protection with load shedding
Design: Maintain p99 Latency SLOs During Sudden Traffic Spikes Context You are designing a user-facing, read-heavy HTTP/gRPC service that occasionally...
Explain Redis design, persistence, and scaling
Redis: Data Structures, Persistence, Eviction, High Availability, and Operational Pitfalls Context: You are designing a latency-critical backend that ...