Node JS Backend developer/API Design ExpertExp - 5+yrsLocation - RemoteShift timings - 7:30 pm to 12:30am mandatory(rest 3hours flexible)Job Requirements:At least 5+ years of experience in backend development, primarily with Node.js.API Design Expertise Experience in designing RESTful APIs for complex systems,handling at least 5+ related API resources (e.g., database tables, microservices).Data Modeling & Schema Design Strong understanding of relational and non-relationaldata structures, constraints, and validation rules.API Documentation Standards Proficiency with Markdown, OpenAPI/Swagger, JSONSchema, and documentation tools like Postman, Stoplight, or ReadMe.io.Technical Writing Ability to write clear, structured, and unambiguous API specifications,covering business rules and edge cases.HTTP & REST Protocol Knowledge Deep understanding of HTTP methods, responsecodes, headers, authentication, and error handling.API Lifecycle Management Familiarity with API versioning strategies, deprecationpolicies, and backward compatibility.Testing & Validation Experience with API contract testing, automated validation, anderror response consistency.Job Responsibilities:Write clear, structured, and detailed API specifications, ensuring comprehensiveendpoint documentation.Define data schemas, business rules, and validation logic, incorporating cross-resourcedependencies.Establish error handling standards and validation rules to improve API reliability andconsistency.Collaborate with engineering and product teams to refine API specifications and ensureseamless integration.Develop API documentation using Markdown, OpenAPI/Swagger, JSON Schema, andtools such as Postman or Stoplight.Domain Knowledge:Business Logic Translation Ability to convert complex business requirements intowell-structured API specifications.Cross-Resource Rules Expertise in defining relationships, dependencies, andconstraints across multiple API resources.Edge Case Handling Ability to anticipate and document exceptional scenarios andfallback mechanisms.Validation Logic Strong understanding of input validation, error messages, andbusiness rule enforcement.