System Design

⏱ 6 min read Event Schema The event is the core entity. It supports single and recurring events, multiple attendees, and rich metadata: events […] Read article

⏱ 6 min read Form Schema A form is defined as a document with ordered questions, each with a type and optional configuration: forms Read article

⏱ 6 min read Work Breakdown Structure The project hierarchy flows from top to bottom: Project → Epics → Stories → Tasks. Each node Read article

⏱ 6 min read Database Proxy Low-Level Design A database proxy sits in the network path between application servers and the database. It multiplexes Read article

⏱ 6 min read Query Cache Low-Level Design A query cache stores database query results in fast storage (typically Redis) so repeated identical queries Read article

⏱ 5 min read Data Export Service Low-Level Design A data export service lets users extract large datasets in their preferred format. The core Read article

⏱ 5 min read Data Import Service Low-Level Design A data import service ingests user-supplied files into the system's database. The main challenges are: Read article

⏱ 5 min read Report Builder Low-Level Design A report builder lets non-engineers define, save, schedule, and share data reports without writing raw SQL. Read article

⏱ 6 min read Log Pipeline Low-Level Design A production log pipeline moves log data from every host and container to durable storage where Read article

⏱ 5 min read Error Tracking Service Low-Level Design An error tracking service answers two questions: “What broke?” and “Has it broken before?” It Read article

⏱ 6 min read Continuous Profiler Low-Level Design A continuous profiler measures where a production service spends CPU time without requiring code changes or Read article

⏱ 6 min read Rollout Schema A feature flag with gradual rollout has the following core fields: { flag_id: “checkout-v2”, rollout_plan: [ {percentage: 1, Read article

⏱ 6 min read Object Types A version control system stores three object types in a content-addressed object store: Blob: raw file content. The Read article

⏱ 6 min read Data Model: Shapes A whiteboard is a collection of shapes. Each shape is a flat record: { id: “uuid”, type: Read article

⏱ 6 min read Pull Request Model A pull request (PR) represents a request to merge a source branch into a target branch. Core Read article