REST API Design — ServiceMuhammed Ali Bekdaş
I design clear, secure, and scalable REST APIs that front-end teams and partners can rely on. Starting from business use cases and consumer needs, I model resources and flows, then produce a production-ready OpenAPI contract that removes ambiguity and accelerates integration. The design covers versioning and deprecation, auth/RBAC, rate limiting & quotas, and a consistent error model with retry and idempotency rules—so your API is predictable under real-world load.
What this includes by default
Resource modeling & contract — Well-named endpoints, request/response bodies, pagination/filters, status codes, and examples in OpenAPI 3.x.
Security & policies — JWT/OAuth flows, RBAC roles/permissions, input validation, rate limiting, idempotency, timeouts.
Developer experience — Human-readable docs, Postman/Insomnia collections, and a mock server for rapid client development.
Reliability & ops — Baseline contract tests, observability guidance (logs/metrics/traces, correlation IDs), and practical performance budgets (e.g., p95 latency goals).
Why it matters
Faster integrations: A precise contract and ready-to-run collections reduce back-and-forth and shorten “time-to-first-call.”
Fewer breaking changes: Versioning and change governance protect existing consumers while your API evolves.
Operational confidence: Consistent errors, retries, and rate limits make behavior predictable during traffic spikes.
Tailoring to your goals
Deliverables are right-sized to scope and complexity. For greenfield MVPs, we can keep the contract lean and focus on velocity; for enterprise or partner use, we can add a reference implementation (Node.js/Python/Java), gateway policies (Kong/NGINX), SDK stubs, deeper performance/security passes, and observability dashboards.
What's included
REST API Design
API Contract (OpenAPI 3.x)
Resource model, endpoints, params, pagination/filters, request/response bodies, examples—production-ready spec.
Error & Status Model
Consistent error schema, status codes, retry semantics, idempotency keys, and timeout guidelines.
Auth & Security Design
JWT/OAuth flow, RBAC roles/permissions, input validation, rate limiting/quotas, secrets handling guidance.
Versioning & Deprecation Policy
v1 baseline, compatibility rules, changelog template, deprecation timeline and communication plan.
Postman/Insomnia Collections & Mock Server
Executable requests, example payloads, and a mock server config for rapid consumer integration.
Developer Documentation (Human-Readable)
Quickstart, endpoint catalogue, naming conventions, examples, and usage patterns for clients/partners.
Contract Tests (Baseline)
Automated contract checks against the OpenAPI spec; smoke tests for critical paths.
Observability Blueprint
Logs/metrics/tracing fields (incl. correlation IDs), sample dashboards, and alert rules starter set.
Performance Budget & Guidelines
Latency targets (e.g., p95), payload sizing, pagination strategies, and caching recommendations.
Handover Session & Materials
Walkthrough of the spec, decisions, and workflows; slide/notes + recording link.
Optional add-ons (if included in scope)
Reference Implementation (Node.js/Python/Java) — Validated routers/validators/handlers with CI/linting.
API Gateway Policies (Kong/NGINX) — Auth, rate limits, request/response transforms.
SDK Stubs (TS/Python/Java) — Generated clients with examples and publish instructions.
Load-Test Baseline — k6/JMeter plan, scripts, and initial report.
Security Hardening Review — Headers, input sanitization, abuse cases, checklist & fixes.
Scope note (put this in Description):
Deliverables are tailored to the project’s goals and complexity. By default you receive the OpenAPI contract, docs, collections, and baseline tests; reference code, gateway policies, SDKs, and performance/security extras can be added as needed. Source code is included only when a reference implementation is in scope.
Muhammed Ali's other services
Contact for pricing
Tags
C#
Java
Node.js
PHP
Python
Backend Engineer
Software Engineer
Service provided by
Muhammed Ali Bekdaş İstanbul, Turkey
REST API Design — ServiceMuhammed Ali Bekdaş
Contact for pricing
Tags
C#
Java
Node.js
PHP
Python
Backend Engineer
Software Engineer
I design clear, secure, and scalable REST APIs that front-end teams and partners can rely on. Starting from business use cases and consumer needs, I model resources and flows, then produce a production-ready OpenAPI contract that removes ambiguity and accelerates integration. The design covers versioning and deprecation, auth/RBAC, rate limiting & quotas, and a consistent error model with retry and idempotency rules—so your API is predictable under real-world load.
What this includes by default
Resource modeling & contract — Well-named endpoints, request/response bodies, pagination/filters, status codes, and examples in OpenAPI 3.x.
Security & policies — JWT/OAuth flows, RBAC roles/permissions, input validation, rate limiting, idempotency, timeouts.
Developer experience — Human-readable docs, Postman/Insomnia collections, and a mock server for rapid client development.
Reliability & ops — Baseline contract tests, observability guidance (logs/metrics/traces, correlation IDs), and practical performance budgets (e.g., p95 latency goals).
Why it matters
Faster integrations: A precise contract and ready-to-run collections reduce back-and-forth and shorten “time-to-first-call.”
Fewer breaking changes: Versioning and change governance protect existing consumers while your API evolves.
Operational confidence: Consistent errors, retries, and rate limits make behavior predictable during traffic spikes.
Tailoring to your goals
Deliverables are right-sized to scope and complexity. For greenfield MVPs, we can keep the contract lean and focus on velocity; for enterprise or partner use, we can add a reference implementation (Node.js/Python/Java), gateway policies (Kong/NGINX), SDK stubs, deeper performance/security passes, and observability dashboards.
What's included
REST API Design
API Contract (OpenAPI 3.x)
Resource model, endpoints, params, pagination/filters, request/response bodies, examples—production-ready spec.
Error & Status Model
Consistent error schema, status codes, retry semantics, idempotency keys, and timeout guidelines.
Auth & Security Design
JWT/OAuth flow, RBAC roles/permissions, input validation, rate limiting/quotas, secrets handling guidance.
Versioning & Deprecation Policy
v1 baseline, compatibility rules, changelog template, deprecation timeline and communication plan.
Postman/Insomnia Collections & Mock Server
Executable requests, example payloads, and a mock server config for rapid consumer integration.
Developer Documentation (Human-Readable)
Quickstart, endpoint catalogue, naming conventions, examples, and usage patterns for clients/partners.
Contract Tests (Baseline)
Automated contract checks against the OpenAPI spec; smoke tests for critical paths.
Observability Blueprint
Logs/metrics/tracing fields (incl. correlation IDs), sample dashboards, and alert rules starter set.
Performance Budget & Guidelines
Latency targets (e.g., p95), payload sizing, pagination strategies, and caching recommendations.
Handover Session & Materials
Walkthrough of the spec, decisions, and workflows; slide/notes + recording link.
Optional add-ons (if included in scope)
Reference Implementation (Node.js/Python/Java) — Validated routers/validators/handlers with CI/linting.
API Gateway Policies (Kong/NGINX) — Auth, rate limits, request/response transforms.
SDK Stubs (TS/Python/Java) — Generated clients with examples and publish instructions.
Load-Test Baseline — k6/JMeter plan, scripts, and initial report.
Security Hardening Review — Headers, input sanitization, abuse cases, checklist & fixes.
Scope note (put this in Description):
Deliverables are tailored to the project’s goals and complexity. By default you receive the OpenAPI contract, docs, collections, and baseline tests; reference code, gateway policies, SDKs, and performance/security extras can be added as needed. Source code is included only when a reference implementation is in scope.
Muhammed Ali's other services
Contact for pricing