The backend engineer who never forgets edge cases

API endpoint scaffolding

Describe your resource and Claude Code generates REST or GraphQL endpoints with validation, error handling, rate limiting, pagination, and OpenAPI documentation — following your project's existing patterns.

Database migration authoring

Describe the schema change you need. Claude Code writes forward and rollback migrations, updates your ORM models, and adjusts any affected queries or serializers to match the new schema.

Authentication and authorization

Claude Code implements OAuth flows, JWT handling, role-based access control, or API key management. It handles token refresh, session management, and security headers correctly out of the box.

Integration test generation

Claude Code creates tests that spin up test databases, seed realistic data, exercise your API endpoints, and verify response shapes, status codes, and error handling paths.

Performance profiling and optimization

Identify N+1 queries, missing indexes, and inefficient serialization. Claude Code reads your query patterns and suggests or implements optimizations with measurable impact.

Backend development is full of repetitive patterns that require precision: input validation, error handling, database queries, serialization, authentication checks, and logging. Getting any one of these wrong creates bugs or security vulnerabilities. Claude Code excels at this type of work because it applies patterns consistently across your entire codebase. It never forgets to validate an input, never skips error handling on a database call, and never leaves a security header unconfigured.

Claude Code works with any backend language and framework. It writes idiomatic code whether you use Node.js with Express or Fastify, Python with Django or FastAPI, Ruby on Rails, Go with Gin or Echo, Rust with Axum or Actix, or Java with Spring Boot. It adapts to your project's conventions by reading your existing code, so the output is consistent with what your team already writes.