API and marketplace integrations
REST API · Webhooks · Marketplaces · Payments · Data sync
API and marketplace integrations
I connect external APIs, marketplaces, payment systems, CRM, Telegram, email services and internal platforms into one reliable data flow.
An integration is designed around ownership of data, rate limits, retries, duplicate events and reconciliation—not only around a successful example request.
Integration work
Marketplaces
Products, content, prices, stock, orders and status synchronization with marketplace APIs.
Payments
Payment creation, callbacks, reconciliation, refunds and protection from duplicate events.
CRM and communication
Transfer leads and customer events between websites, CRM, email, telephony and Telegram.
Custom external APIs
Authentication, data mapping, pagination, limits, webhooks and scheduled synchronization.
Reliable delivery
External services fail and change. A production integration must make that normal condition manageable.
Discovery
I clarify the users, business process, data sources, integrations, constraints and failure scenarios before choosing an implementation.
Requirements · workflows · risksArchitecture
I define the application structure, API boundaries, data model, permissions, queues and external integration points.
Backend · API · database · securityIncremental delivery
The work is split into testable stages so that the critical path can be reviewed before the entire system is complete.
Milestones · reviews · predictable scopeLaunch and support
I verify real workflows, logging, error handling and background jobs, then help maintain and extend the solution.
Monitoring · logs · support
Failure handling
Rate limits and queues
Requests are paced and scheduled so traffic spikes do not break the integration.
Retries and reconciliation
Safe failures are retried, while periodic checks detect missing or diverged records.
Useful logs
Each operation has identifiers and context so a failed order or update can be traced.
Technology and delivery
Expected result
A monitored integration that keeps data consistent, survives temporary failures and provides enough history to investigate any disputed operation.
API Integrations · Marketplaces · Ozon · Wildberries · Webhooks · Payments · Data Sync
Discuss your project
If you have a project involving Python, Laravel, Node.js, CRM, Telegram, AI/RAG, API integrations, automation or TON/GRAM logic, send me a short description of what you need.
You can simply explain what exists now, what is not working, what outcome you expect and which services are already involved.