System Design

⏱ 6 min read What Is a Delivery Tracking Service? A delivery tracking service monitors the lifecycle of a shipment from pickup through final […] Read article

⏱ 5 min read What Is a Gift Card Service? A gift card service handles the full lifecycle of stored-value cards: issuance, activation, balance Read article

⏱ 6 min read What Is a Promotional Code Engine? A promotional code engine generates discount codes, enforces usage rules, validates eligibility at checkout, Read article

⏱ 6 min read What Is a Supply Chain Management Service? A supply chain management (SCM) service coordinates the flow of goods from suppliers Read article

⏱ 7 min read An expense management system handles the full lifecycle of employee expenses: from receipt capture in the field to reimbursement hitting Read article

⏱ 5 min read What Is a Code Execution Sandbox? A code execution sandbox is an isolated environment that compiles and runs arbitrary user-submitted Read article

⏱ 5 min read What Is a Newsletter Service? A newsletter service lets product teams send bulk email campaigns to segmented subscriber lists. It Read article

⏱ 5 min read What Is a Waitlist Service? A waitlist service manages an ordered queue of users waiting for access to a product, Read article

⏱ 6 min read What Is a User Feedback Service? A user feedback service collects structured and free-form feedback from users across product surfaces, Read article

⏱ 7 min read What Is a Speech-to-Text Service? A speech-to-text (STT) service, also called automatic speech recognition (ASR), converts audio input into a Read article

⏱ 6 min read What Is a Multimodal Search Service? A multimodal search service allows users to search using multiple input modalities simultaneously or Read article

⏱ 7 min read What Is an LLM Gateway? An LLM gateway is a service layer that sits between your application and one or Read article

⏱ 7 min read What Is a RAG Pipeline? Retrieval-Augmented Generation (RAG) is an architecture that improves LLM output quality by retrieving relevant documents Read article

⏱ 8 min read What Is an AI Content Safety Service? An AI content safety service filters and classifies text (and other modalities) produced Read article

⏱ 6 min read Problem Statement Design a scalable IoT data ingestion service that handles millions of connected devices sending sensor readings, events, and Read article