System Design Projects

Design a low-latency personalization platform that retrieves candidates, hydrates online features, and re-ranks results in real time under strict latency and quality SLOs.

Design a production-grade platform for logging LLM prompts and responses, redacting sensitive data, evaluating quality/safety in near real time, and routing actionable incidents.

Design a production-grade model drift detection platform that monitors live inference traffic, detects drift in minutes, and routes actionable incidents with low noise.

Design a low-latency online feature store that serves consistent features for real-time ML inference while guaranteeing training/serving parity and point-in-time correctness.

Design a platform that removes duplicate events across distributed pipelines with low latency.

Design a real-time leaderboard system that serves millions of players with p99 rank reads under 80ms, handles 1.2M score updates/sec, and enforces explainable anti-cheat decisions.

Design a platform that manages schema changes across services with compatibility guarantees, automated migration workflows, and data contract enforcement at scale.

Design a system that captures database changes in real-time and streams them to downstream systems with schema evolution support, exactly-once delivery, and multi-database compatibility.

Design a system that triggers real-time alerts when millions of users enter or exit geographic zones, supporting complex polygon boundaries, high-frequency location updates, and sub-second detection latency.

Design a system that detects anomalies in streaming data using ML models with adaptive thresholds and explainable alerts

Design an event replay platform that allows developers to capture, store, and replay events from microservices for debugging and testing purposes. Enable time-travel debugging across distributed systems.