Many platforms do not provide public APIs, or their documentation is incomplete, outdated, or limited. I help teams understand how those systems work behind the scenes, then build a clean backend layer that can reproduce the required workflow reliably.

This service is useful when you need to integrate with a web app, mobile app, vendor portal, internal dashboard, legacy system, or non-documented protocol. I can inspect request flows, authentication behavior, headers, cookies, tokens, payload formats, and session logic, then implement a working API wrapper or automation service around it.

The goal is to turn a difficult manual process into a maintainable backend system your team can use through a simple API.

Reverse engineering of undocumented APIs

Middleware API for private or hidden workflows

Automation flow for web/mobile systems

Backend wrapper for vendor portals or legacy platforms

Request signing, token, cookie, and session handling

Login/authentication flow automation

Data extraction and synchronization

Payment, transfer, order, account, or dashboard workflow automation

Clean REST API layer around complex third-party flows

Technical documentation for discovered endpoints and behavior

A vendor system has no public API, but you need automation.

A web dashboard requires repeated manual actions.

A mobile app uses private endpoints your team needs to integrate with.

A legacy platform only works through browser-like flows.

You need a middleware API between your app and an undocumented service.

Your team needs to automate login, form submission, status checking, reporting, or transaction-like workflows.

Depending on project scope, I can provide:

Reverse engineering report

Endpoint and request flow documentation

Authentication/session flow mapping

Working proof of concept

Middleware API built with TypeScript, Node.js, Go, or Python

Automation worker or backend service

Error handling, retries, logging, and validation

Database integration if needed

Docker setup and deployment notes

Handover documentation

I only work on systems where you have authorization to access, integrate, or automate the workflow. I do not help with unauthorized access, bypassing security controls, fraud, credential theft, or abusive automation.