Cellular 5G /4G Physical Layer Firmware Engineer

As a Cellular 5G/4G Physical Layer Firmware Engineer at Apple, you will be a part of an extraordinary modem team that crafts sophisticated and pioneering embedded firmware to deliver more performance in products than ever before. You will work on transforming improved hardware elements into a single, integrated design, innovating new wireless systems technologies that continually outperform previous iterations. **Key Responsibilities:** - Implement key 3GPP protocols and control/data path processing algorithms with very tight time, latency, and energy budgets by interfacing to specialized cellular ASIC hardware. - Work on 3GPP channels and procedures such as PDCCH, PDSCH, PBCH, PUCCH, PUSCH, PRACH, UL/DL HARQ, Tracking loops. - Refine signal processing algorithms for efficient firmware/hardware execution in collaboration with systems engineers. - Define firmware architecture for an innovative mobile wireless communications system. - Develop pre-silicon emulation systems/virtual platforms for pre-silicon FW design and HW verification. - Evaluate and implement tools for build, formal verification, and test. - Define methodologies and best practices for firmware development. **Qualifications Required:** - Experience with hardware control for physical layer 4G/5G data path processing. - Understanding of 5G and 4G 3GPP protocols. - Experience implementing digital signal processing algorithms using special purpose digital signal processing HW. - Strong understanding of linear algebra and digital signal processing principles. - Proficiency in 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 emphasis on the HW/SW interfaces of high-speed communication subsystems. - Experience with silicon prototyping, emulation systems, and virtual platforms. - Proficiency in debugging embedded software systems and familiarity with UARTs, JTAG, and oscilloscopes. - Some mainstream OS application level development and Python or Perl scripting experience. Apple is looking for a candidate who is comfortable with embedded software development, thrives in a dynamic multi-functional organization, and is open to debating ideas openly while being flexible to evolving requirements. Join Apple and be at the forefront of crafting state-of-the-art cellular SoCs that push the boundaries of what wireless systems can do.,