Interview Prep

Real questions for real interviews. C#, Python, Go. Junior → System Design.

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C# / .NET

System Design

Design a distributed rate limiter for an API gateway handling 100,000 requests per second
SystemDesign Frequent system design rate limiting Redis
Design an event-sourced order management system for an e-commerce platform
SystemDesign Occasional system design event sourcing DDD
Design a URL shortener service (high availability, 100M URLs, 10k reads/sec)
SystemDesign Very frequent C# system design URL shortener

Python

Mid-level

Design a Python service for processing real-time user activity events with rate limiting
SystemDesign Frequent Python system design Kafka

System Design

Design a real-time data pipeline in Python capable of processing 1 million events per day
SystemDesign Occasional Python Kafka data pipeline
Design a URL shortener in Python — architecture, storage, and scale to 1B URLs
SystemDesign Frequent Python system design URL shortener

Go

Mid-level

Implement a context-aware system design for a real production challenge you've faced
SystemDesign Frequent Go system design caching

Senior

Design a URL shortener service in Go — high availability, 10k redirects/sec
SystemDesign Frequent Go system design URL shortener

System Design

Design a horizontally scalable push notification service in Go
SystemDesign Occasional Go system design push notifications