Build an API Key Management System Premium
Design an API key platform that issues scoped keys with per-key rate limits, propagates revocations to all gateway nodes within 1 second, and provides usage analytics per key without adding latency to the hot path.
Build a Bot Detection System Using Behavioral Signals Premium
Design a bot detection system that distinguishes human users from automated bots using behavioral and network signals, works without user-visible challenges, and updates its models as bots adapt their behavior.
Build a Certificate Authority and Automated TLS Cert Rotation Premium
Design an internal PKI system that issues TLS certificates to 10,000 services, automates renewal before expiry, and distributes updated certs without requiring service restarts.
Build a Content Moderation Pipeline Premium
Design a content moderation system that uses ML classifiers to automatically detect policy violations in text, images, and video, routes borderline cases to human reviewers, and minimizes both over-removal and under-removal.
Build a Distributed Code Execution Runtime Free
Design a secure, sandboxed code execution engine that compiles and runs untrusted user code in multiple languages, returns output within seconds, and scales to thousands of concurrent submissions.
Build a DRM Token Vending System for Premium Video Premium
Design a digital rights management system that issues short-lived playback licenses to authenticated subscribers, prevents license sharing across accounts, and revokes access instantly when a subscription lapses.
Build an Enterprise SSO System Federating 500 SaaS Applications Premium
Design a Single Sign-On platform that federates identity across 500 SaaS applications using SAML and OIDC, enforces MFA policies, and propagates user deprovisioning to all connected apps within seconds of an account being disabled.
Build a HIPAA-Compliant Tamper-Evident Audit Log Premium
Design an audit logging system for healthcare data where every record access and modification is logged immutably, the log itself cannot be altered without detection, and auditors can query it efficiently.
Build JWT Auth System at Production Scale Premium
A production-grade deep dive into designing a complete JWT authentication system: architecture, login flow, request verification, token rotation, key management, and security hardening.
Build an OAuth 2.0 Authorization Server Premium
Design an OAuth 2.0 authorization server that supports PKCE for public clients, implements refresh token rotation to detect theft, and provides a token revocation endpoint that propagates across all resource servers within seconds.