Go Developer for Automated Web-Based Top-Up API

We are seeking an experienced Golang developer to design and implement a backend API that automates digital top-up operations through a third-party web interface.

The system should replicate a real user flow: submitting required data, processing transactions, and returning structured responses via API endpoints. The solution must be reliable, scalable, and suitable for production use.

Key Responsibilities

Design and develop a backend API in Go

Implement end-to-end transaction flow (request → submission → processing → response)

Build a system that programmatically interacts with a web interface (form submission and flow replication)

Handle session management, cookies, headers, and dynamic request parameters

Implement robust error handling, retry logic, and logging

Ensure performance optimization and system stability

Strong experience with Go (Golang) backend development

Experience with web automation or browser emulation (e.g., headless browsers or HTTP flow replication)

Solid understanding of HTTP/HTTPS, sessions, cookies, and request lifecycle

Experience working with protected or dynamic websites (rate limiting, anti-bot mechanisms, etc.)

Ability to analyze and reproduce web flows without official API documentation

Experience with tools such as chromedp, Playwright, or Puppeteer

Background in high-load or transaction-based systems

Familiarity with reverse engineering of web-based workflows

Expected Outcome

Production-ready API for automated top-up operations

Clean, maintainable, and well-documented Go code

Clear integration documentation

Stable execution with minimal failure rate

what need

https://docs.google.com/document/d/1kHpWTHea5kAxZVSwyTRWU9vVE2t1WR05dBoNI8DSXIE/edit?usp=sharing