Total 53,816 skills, Backend Development has 4322 skills
Showing 12 of 4322 skills
Expert in JSON:API serialization patterns using ts-jsonapi or similar libraries.
Generate REST API endpoints with proper structure, validation, error handling, and types. Use when creating new API routes, endpoints, or backend services.
Build Azure Cosmos DB NoSQL services with Python/FastAPI following production-grade patterns. Use when implementing database client setup with dual auth (DefaultAzureCredential + emulator), service layer classes with CRUD operations, partition key strategies, parameterized queries, or TDD patterns for Cosmos. Triggers on phrases like "Cosmos DB", "NoSQL database", "document store", "add persistence", "database service layer", or "Python Cosmos SDK".
Scaffold a complete credits/token metering system for any app — database schema, backend middleware, payment webhooks, frontend state, and UI components. Goes from zero to "users can buy and spend credits" in one session.
Create Pydantic models following the multi-model pattern with Base, Create, Update, Response, and InDB variants. Use when defining API request/response schemas, database models, or data validation in Python applications using Pydantic v2.
Make cross-contract calls in MultiversX smart contracts. Use when calling another contract, handling callbacks, managing back-transfers, using typed proxies, or sending tokens via the Tx builder API (.tx().to()).
Build and debug Enable Banking API integrations for account information (AIS), payment initiation (PIS), ASPSP discovery, user sessions, JWT authentication with RSA certificates, sandbox setup, and TypeScript/Node clients. Use when Codex needs to implement Enable Banking request flows, generate or validate bearer JWTs, model Enable Banking schemas, handle PSU redirect callbacks, fetch accounts/balances/transactions, create payments, or troubleshoot Enable Banking API errors.
Auto-activate for sqlspec, SQLSpec, SQLFileLoader, drivers, query builders, named SQL, filters, pagination, Arrow, framework extensions, ADK stores, data dictionary, or observers. Not for ORM repositories.
Best-practices guide for Better Auth's most-used features — email/password authentication (verification, password reset, hashing, policies), organization plugin (multi-tenant orgs, teams, RBAC), and two-factor authentication (twoFactor plugin). Use when implementing any of these features, when stuck on a Better Auth feature decision, or as a one-stop reference for the common-feature trio.
Builds GraphQL APIs with schema design, resolvers, error handling, and performance optimization using Apollo or Graphene. Use when creating flexible query APIs, migrating from REST, or implementing real-time subscriptions.
Primary Apex authoring skill for class generation, refactoring, and review. ALWAYS ACTIVATE when the user mentions Apex, .cls, triggers, or asks to create/refactor a class (service, selector, domain, batch, queueable, schedulable, invocable, DTO, utility, interface, abstract, exception, REST resource). Use this skill for requests involving SObject CRUD, mapping collections, fetching related records, scheduled jobs, batch jobs, trigger design, @AuraEnabled controllers, @RestResource endpoints, custom REST APIs, or code review of existing Apex.
Expert-level financial systems, FinTech, banking, payments, and financial technology