Software Engineer - Systems

Apple•Cupertino, CA

19h•Hybrid

About The Position

Imagine what you can do here. Apple is a place where extraordinary people gather to do their lives best work. Together we create products and experiences people once couldn’t have imagined, and now, can’t imagine living without. It’s the diversity of those people and their ideas that inspires the innovation that runs through everything we do. APPLE INC has the following available in Cupertino, California and various unanticipated locations throughout the USA. Ensure high performance of Wi-Fi, Bluetooth and Thread when used simultaneously by Apple’s devices. Coordinate with vendors about issues with Wi-Fi or Bluetooth performance and evaluate the impact of new wireless features. Software development for WIFI host software Deamons using objectiv-C language. Working on software projects that control Wi-Fi policy for coexistence cases, configuring transmit power, modes of operation, Wi-Fi roaming, and other wireless configurations. Knowledge of the objective-C programming language, the full Wi-Fi software stack, and experience with debugging crashes in Deamons and reducing memory footprints. Knowledge of RF schematics for considering different RF module designs and their tradeoffs. Knowledge of different wireless concepts such as transmit-beam forming, maximal-ratio-combining, as well as the effects of USB defense on antennas. Fulfill duties related to the full device shipment process from concept review to final customer release. Knowledge of all aspects of device delivery, from FW stability to regulatory certification.

Requirements

Knowledge of the objective-C programming language, the full Wi-Fi software stack, and experience with debugging crashes in Deamons and reducing memory footprints.
Knowledge of RF schematics for considering different RF module designs and their tradeoffs.
Knowledge of different wireless concepts such as transmit-beam forming, maximal-ratio-combining, as well as the effects of USB defense on antennas.
Using WiFi protocol at MAC and PHY layers to analyze WiFi connectivity issues and improve SW quality, including basic operations including scan, join , roaming, and various security modes to advanced WiFi protocols including 11ac/ax/be
Utilizing critical PHY/MAC elements that impact WiFi connectivity and performance to analyze and improve WiFi SW quality, including EAPOL exchange, MCS rate, or AMPDU aggregation.
Understanding UDP/TCP protocol and cross-layer interaction with WiFi SW stack, to profile and investigate end-to-end performance issues
Using BT protocol and operations, co-existence and interaction with WiFi radio operation, and various optimization techniques to strike the right balance between BT and WiFi performance and usability
Applying embedded OS fundamentals and using C/C++ to work on embedded software that involves Object-Oriented design, multi-threading implementation, and consideration of optimizing memory/CPU overhead
Working on interface design, co-development, and system integration of WiFi driver SW with chip FW
Applying understanding RF antenna design, reading schematic of RF front end and analysis of intrinsic impact to WiFi/BT co-existence at runtime
Analyzing and driving system level investigation related to radio co-existence

Responsibilities

Ensure high performance of Wi-Fi, Bluetooth and Thread when used simultaneously by Apple’s devices.
Coordinate with vendors about issues with Wi-Fi or Bluetooth performance and evaluate the impact of new wireless features.
Software development for WIFI host software Deamons using objectiv-C language.
Working on software projects that control Wi-Fi policy for coexistence cases, configuring transmit power, modes of operation, Wi-Fi roaming, and other wireless configurations.
Fulfill duties related to the full device shipment process from concept review to final customer release.
Knowledge of all aspects of device delivery, from FW stability to regulatory certification.