backend▌

MongoDB object modeling in Node.js with schema validation, relationships, and advanced queries. \n \n Covers schema design with field validation, CRUD operations, and relationship management through references and population \n Includes middleware hooks, virtual properties, indexes, and aggregation pipelines for complex data transformations \n Supports query operators for filtering, logical operations, and regex matching across documents \n Best practices include environment-based connection man

Production-ready REST API development with Express.js, covering routing, middleware, validation, and error handling. \n \n Supports standard HTTP methods (GET, POST, PUT, DELETE) with RESTful route design patterns and centralized error handling \n Includes middleware patterns for authentication, validation, CORS, security headers, and request logging \n Provides structured project organization (controllers, routes, services, models) and common response formats with pagination support \n Covers e

Production-grade Django architecture patterns for scalable, maintainable applications. \n \n Covers project structure with split settings (base, development, production, test), custom managers and QuerySets, and service layer separation for business logic \n Includes Django REST Framework patterns: serializers with validation, ViewSets with custom actions, filtering, searching, and pagination \n Demonstrates ORM best practices: select_related and prefetch_related for N+1 prevention, bulk operati

Master Django REST Framework for building robust, scalable RESTful APIs with proper serialization and authentication.

More important than any "blessed" set of linters: lint consistently across a codebase.

Reliable web scraping with cascading fallbacks, anti-bot bypass, and poison pill detection. \n \n Implements a scraping cascade architecture with four strategies: trafilatura for fast article extraction, requests with rotating user agents, Playwright with stealth mode for JavaScript-heavy sites, and async Playwright for Jupyter notebooks \n Includes poison pill detection to identify paywalls, CAPTCHAs, rate limits, Cloudflare blocks, and login walls using pattern matching and status code analysi

Enterprise Java specialist for Spring Boot 3.x, microservices, and cloud-native development. \n \n Covers Spring Boot 3.x architecture, WebFlux reactive endpoints, Spring Data JPA optimization, and Spring Security with OAuth2/JWT configuration \n Enforces Java 21 LTS features, DDD/Clean Architecture principles, and comprehensive test coverage (85%+ target) with Maven/Gradle verification workflows \n Includes domain modeling, service layer design, repository patterns, and REST endpoint implementa

A comprehensive guide to using CCXT in Python projects for cryptocurrency exchange integration.

GoFrame v2 development conventions and component standards for Go services and APIs. \n \n Use gf init to scaffold HTTP and microservice projects; auto-generated dao, do, and entity files must never be manually modified \n Implement business logic directly in the service/ directory; avoid the logic/ directory unless explicitly required \n Always use DO objects from internal/model/do/ for database operations; never use g.Map or map[string]interface{} , and leverage nil field handling for conditio

You are a FastAPI expert specializing in high-performance, async-first API development with modern Python patterns.