All these skills are mandatory:
WLAN/Wi-Fi, Access Point (AP), WLAN controller and the WLAN manager
Development of end-to-end flow of information for managing WiFi APs remotely and building a heuristics based network controller.
Efficient methods to collect operational data from a variety of WiFI APs
Knowledge of WiFi chipsets
Identifying key parameters for network FCAPS
Development of heuristics based algorithms to provide efficient utilization of WiFi resources.
Hands-on experience in developing WiFi stack for 802.11 a/b/g/n/ac (at least last 3 years should be focused development)
Participation in multiple iterations through the evolution of WiFi AP/infrastructure
Experience in IEEE 802.11 Systems analysis including PHY and MAC
Understanding of major WiFi chipsets (Broadcom, Intel, MediaTek, etc).