Embedded 5G/4G Cellular Physical Layer DSP Firmware Engineer

Sunnyvale, California, United States


Role Number:200450897
Do you have a passion for invention and self-challenge? As part of an extraordinary modem team, you'll craft sophisticated groundbreaking embedded firmware that deliver more performance in our products than ever before! We'll work across subject areas to transform improved hardware elements into a single, coordinated design. Join us, and you’ll help us innovate new wireless systems technologies that continually outperform the previous iterations. By collaborating with other product development groups across Apple, you’ll push the industry boundaries of what wireless systems can do and improve the product experience for our customers across the world. As a Wireless Embedded Physical Layer DSP Firmware Engineer on this team, you will be at the center of the embedded 5G/4G/multimode cellular firmware effort within a silicon design group responsible for crafting and productizing groundbreaking cellular SoCs. This position requires someone comfortable will all aspects of embedded software development, that thrives in a multifaceted multi-functional organization, is not afraid to debate ideas openly, and is flexible enough to shift on constantly evolving requirements.


Implement key 3GPP digital signal processing algorithms with very tight time, latency and energy budgets by interfacing to specialized cellular ASIC hardware. Examples of 3GPP algorithmic areas include: • Channel Estimation • Channel State Feedback • Interference Cancellation • Cell Search and Measurement • Beam Measurement • Work with systems engineers to refine signal processing algorithms for efficient firmware/hardware execution • Work with silicon designers to define HW interfaces, processors, bus, DMA, accelerator, and memory subsystems. • Specify, design, and implement the firmware architecture of an innovative mobile wireless communications system • Assist in the development of pre-silicon emulation systems/virtual platforms and use them for pre-silicon FW design and HW verification • Evaluate and implement groundbreaking tools for build, formal verification and test. • Define methodologies and standard processes

Minimum Qualifications

Key Qualifications

  • Minimum BS and 3+ years of relevant industry experience.
  • Experience implementing digital signal processing algorithms using special purpose digital signal processing HW
  • Understanding of 5G and 4G 3GPP protocols
  • Deep understanding of software engineering principles, and core computer science fundamentals
  • Fundamental facility with C and C++, compilers, build and source code control tools
  • Significant experience with memory constrained Real Time Operating Systems (RTOS) and concurrent programming
  • Solid understanding of computer architecture with particular emphasis on the HW/SW interfaces of high speed communication subsystems
  • Experience with silicon prototyping, emulation systems, and virtual platforms
  • Proficiency debugging embedded software systems. Familiarity with UARTs, JTAG, and oscilloscopes
  • Some mainstream OS application level development and Python or Perl scripting experience

Preferred Qualifications

Education & Experience

Minimum BS and 3+ years of relevant industry experience.

Additional Requirements

Pay & Benefits

  • Apple is an equal opportunity employer that is committed to inclusion and diversity. We take affirmative action to ensure equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant.