APIs and system integrations

Freelance PHP API Developer for reliable integrations and webhooks.

I build and repair PHP REST APIs, authentication flows, API clients, webhooks and background jobs—with the logs, retries and recovery controls needed when business systems cannot fail silently.

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API services

Interfaces that remain understandable under pressure.

API design and development

Domain-focused endpoints, validation, consistent errors, pagination, filtering, version-aware changes and contracts frontend or partner teams can use.

Authentication and authorization

OAuth2, JWT, sessions, API clients, tokens, scopes, role-based access and permission checks across protected workflows.

Integration reliability

Webhook signatures, idempotency, delivery records, retries, replay tools, scheduled processing, alerts and useful logs.

Common project types

PHP integration work from request to recovery.

REST endpointsClear resources, request validation, status codes, error formats and backward-aware changes.
API clientsThird-party authentication, timeouts, rate limits, response mapping and resilient error handling.
Webhook deliverySigned payloads, event filtering, idempotency, retry policies and replay.
OpenAPI contractsDocumentation that aligns backend, frontend and external consumers.
Background jobsQueues, cron, pending-delivery processing and observable job failures.
DiagnosisTrace IDs, structured logs, delivery states and evidence that explains what happened.

Reliability approach

Design for the failure path, not only the demo.

Map contractsIdentify producers, consumers, auth, data ownership and compatibility constraints.
Make failure visibleCapture status, attempts, response context and actionable logs.
Recover safelyUse idempotency, bounded retries and controlled replay instead of manual data patches.
Verify end to endTest the business result, not only a successful HTTP response.

Start with evidence

Need to build an API or diagnose an unreliable integration?

Send the endpoint, expected contract, failing payload or webhook, symptoms and sanitized logs. I can identify whether the risk is code, data, auth or delivery architecture.