Job Description
We're building a lightweight Windows desktop agent for our SaaS gym management platform. The agent connects to eSSL/ZKTeco biometric fingerprint devices on the local network and syncs data with our cloud backend.
No Agency, Need individual Developer.
WHAT THE AGENT DOES:
- Connects to eSSL devices via TCP/IP (port 4370) using (COM/ActiveX)
- Polls our REST API for pending commands (sync users, set membership expiry dates, enable/disable users)
- Executes SDK commands on the device and reports results back to cloud
- Runs as a system tray app, auto-starts on boot
- Includes a first-run setup wizard (enter API key → auto-discover device on LAN → connect)
KEY SDK FUNCTIONS:
Connect_Net, SSR_SetUserInfo, SetUserValidDate, SSR_EnableUser, SetDeviceTime2, ReadNewGLogData, SearchDevice, GetSerialNumber, BeginBatchUpdate/BatchUpdate
TECH STACK:
- .NET 8+ (WinForms or WPF)
- C# with COM interop for
- REST API client (HttpClient) for cloud communication
No Agency, Need individual Developer.
WHAT THE AGENT DOES:
- Connects to eSSL devices via TCP/IP (port 4370) using (COM/ActiveX)
- Polls our REST API for pending commands (sync users, set membership expiry dates, enable/disable users)
- Executes SDK commands on the device and reports results back to cloud
- Runs as a system tray app, auto-starts on boot
- Includes a first-run setup wizard (enter API key → auto-discover device on LAN → connect)
KEY SDK FUNCTIONS:
Connect_Net, SSR_SetUserInfo, SetUserValidDate, SSR_EnableUser, SetDeviceTime2, ReadNewGLogData, SearchDevice, GetSerialNumber, BeginBatchUpdate/BatchUpdate
TECH STACK:
- .NET 8+ (WinForms or WPF)
- C# with COM interop for
- REST API client (HttpClient) for cloud communication
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