SAP Instant Bidding Tool Development

I need a small Windows-based utility that log into the my Server (SAP) freight tender portal, waits for a chosen contract to open, and fires our pre-calculated bid the very first millisecond the system allows it. The site awards freight lanes strictly on a first-come-first-served basis, so raw speed and rock-solid reliability matter more than anything else. How I picture the workflow • I enter one or more contract numbers and their ready-made prices (CSV or an on-screen table is fine). • The tool authenticates with our usual SAP credentials, keeps the session alive, and monitors the status of each contract. • The exact moment bidding goes live it submits the stored price, confirms acceptance, and logs the server timestamp so we can prove our place in line. • If the bid fails or the site throws a captcha/timeout, the software should retry instantly with sensible back-off rules and alert me. Technical notes • Must run on Windows 10/11. • I did not lock the build to any one language or technique; browser automation (Selenium, Playwright, etc.), direct API calls, or a hybrid approach are all acceptable as long as they hit the speed target. Feel free to recommend what you believe will shave off the most milliseconds. • Include a simple UI that lets my team load new contracts without touching code, plus a log file we can export. • Source code and a brief setup guide are part of the hand-off. Acceptance criteria 1. From the instant the “bid” button appears to confirmed submission must average <1 s on a 50 ms network latency test. 2. Successful bid placement is confirmed in My Server's own dashboard and recorded in the local log. 3. No sensitive credentials are stored in plain text. If you have already tackled similar high-speed bidding or ticket-grabber projects, I’d love to hear how you beat latency and session issues.