Build robust backend systems with modern technologies (Node.js, Python, Go, Rust), frameworks (NestJS, FastAPI, Django), databases (PostgreSQL, MongoDB, Redis), APIs (REST, GraphQL, gRPC), authentication (OAuth 2.1, JWT), testing strategies, security best practices (OWASP Top 10), performance optimization, scalability patterns (microservices, caching, sharding), DevOps practices (Docker, Kubernetes, CI/CD), and monitoring. Use when designing APIs, implementing authentication, optimizing database queries, setting up CI/CD pipelines, handling security vulnerabilities, building microservices, or developing production-ready backend systems.
Production-ready backend development with modern technologies, best practices, and proven patterns.
<triggers> <trigger>Designing RESTful, GraphQL, or gRPC APIs</trigger> <trigger>Building authentication/authorization systems</trigger> <trigger>Optimizing database queries and schemas</trigger> <trigger>Implementing caching and performance optimization</trigger> <trigger>OWASP Top 10 security mitigation</trigger> <trigger>Designing scalable microservices</trigger> <trigger>Testing strategies (unit, integration, E2E)</trigger> <trigger>CI/CD pipelines and deployment</trigger> <trigger>Monitoring and debugging production systems</trigger> </triggers>Languages: Node.js/TypeScript (full-stack), Python (data/ML), Go (concurrency), Rust (performance) Frameworks: NestJS, FastAPI, Django, Express, Gin Databases: PostgreSQL (ACID), MongoDB (flexible schema), Redis (caching) APIs: REST (simple), GraphQL (flexible), gRPC (performance)
See: references/backend-technologies.md for detailed comparisons
Core Technologies:
backend-technologies.md - Languages, frameworks, databases, message queues, ORMsbackend-api-design.md - REST, GraphQL, gRPC patterns and best practicesSecurity & Authentication:
backend-security.md - OWASP Top 10 2025, security best practices, input validationbackend-authentication.md - OAuth 2.1, JWT, RBAC, MFA, session managementPerformance & Architecture:
backend-performance.md - Caching, query optimization, load balancing, scalingbackend-architecture.md - Microservices, event-driven, CQRS, saga patternsQuality & Operations:
backend-testing.md - Testing strategies, frameworks, tools, CI/CD testingbackend-code-quality.md - SOLID principles, design patterns, clean codebackend-devops.md - Docker, Kubernetes, deployment strategies, monitoringbackend-debugging.md - Debugging strategies, profiling, logging, production debuggingbackend-mindset.md - Problem-solving, architectural thinking, collaborationSecurity: Argon2id passwords, parameterized queries (98% SQL injection reduction), OAuth 2.1 + PKCE, rate limiting, security headers
Performance: Redis caching (90% DB load reduction), database indexing (30% I/O reduction), CDN (50%+ latency cut), connection pooling
Testing: 70-20-10 pyramid (unit-integration-E2E), Vitest 50% faster than Jest, contract testing for microservices, 83% migrations fail without tests
DevOps: Blue-green/canary deployments, feature flags (90% fewer failures), Kubernetes 84% adoption, Prometheus/Grafana monitoring, OpenTelemetry tracing
| Need | Choose | |------|--------| | Fast development | Node.js + NestJS | | Data/ML integration | Python + FastAPI | | High concurrency | Go + Gin | | Max performance | Rust + Axum | | ACID transactions | PostgreSQL | | Flexible schema | MongoDB | | Caching | Redis | | Internal services | gRPC | | Public APIs | GraphQL/REST | | Real-time events | Kafka |
API: Choose style -> Design schema -> Validate input -> Add auth -> Rate limiting -> Documentation -> Error handling
Database: Choose DB -> Design schema -> Create indexes -> Connection pooling -> Migration strategy -> Backup/restore -> Test performance
Security: OWASP Top 10 -> Parameterized queries -> OAuth 2.1 + JWT -> Security headers -> Rate limiting -> Input validation -> Argon2id passwords
Testing: Unit 70% -> Integration 20% -> E2E 10% -> Load tests -> Migration tests -> Contract tests (microservices)
Deployment: Docker -> CI/CD -> Blue-green/canary -> Feature flags -> Monitoring -> Logging -> Health checks
<constraints> <constraint severity="critical">Never store plain-text passwords - always use Argon2id or bcrypt</constraint> <constraint severity="critical">Always use parameterized queries to prevent SQL injection</constraint> <constraint severity="high">Implement rate limiting on all public endpoints</constraint> <constraint severity="high">Use HTTPS/TLS for all production traffic</constraint> <constraint severity="medium">Database migrations must have rollback procedures</constraint> <constraint severity="medium">All API endpoints must have input validation</constraint> </constraints>Search for places (restaurants, cafes, etc.) via Google Places API proxy on localhost.
Interact with GitHub using the `gh` CLI. Use `gh issue`, `gh pr`, `gh run`, and `gh api` for issues, PRs, CI runs, and advanced queries.
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Start voice calls via the OpenClaw voice-call plugin.
Notion API for creating and managing pages, databases, and blocks.
Gemini CLI for one-shot Q&A, summaries, and generation.
Category:developer