Cellular 5G/4G L1 Multi-RAT Control Firmware Engineer

Bengaluru, Karnataka, India


Role Number:200380461
Do you have a passion for invention and self-challenge? Do you thrive on pushing the limits of what’s considered feasible? As part of a world class modem team, you’ll craft sophisticated innovative embedded firmware that deliver more performance in our products than ever before. You’ll work across fields to transform improved hardware elements into a single, integrated design. Join us, and you’ll help us innovate new cellular 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 Cellular Layer 1 Firmware Engineer on this team, you will be at the center of the 5G/4G/multimode cellular firmware effort within a silicon design and firmware development group responsible for designing and productizing pioneering cellular SoCs. This position requires someone comfortable with all aspects of embedded software development, that thrives in a dynamic multi-functional organization, is not afraid to debate ideas openly, and is flexible enough to adjust on constantly evolving requirements. We promote innovation and new technology. The people who work here have reinvented and defined entire industries with the Mac, iPhone, iPad, Apple TV, Apple Watch, AirPods, HomePod and a multitude of groundbreaking Accessories. We have done the same with services, including iTunes, the App Store, Apple Music, and Apple Pay. The same passion for innovation that goes into our products also applies to our practices — strengthening our commitment to leave the world better than we found it. Join us to help deliver the next amazing Apple product!

Key Qualifications

  • Understanding of 5G and 4G 3GPP standards, or similar Wireless standards and competent knowledge on Physical Layer control procedures.
  • Hands-on experience with L1 Software/Firmware in 2G/3G/4G/5G is a plus.
  • Deep understanding of software engineering principles, and core computer science fundamentals.
  • Highly competent with C and C++ programming, proven understanding of compilers, build and source code control tools
  • Significant experience with embedded real-time programming for low latency and memory constrained applications.
  • Experience with Real Time Operating Systems (RTOS) applications, multi-core, multi-threaded and concurrent programming.
  • Experience with silicon prototyping, emulation systems, and virtual platforms.
  • Proficiency in debugging embedded software systems.
  • Familiarity with ETM, ETB, JTAG, and any other trace and debug tools.


- Specify, design, and implement a multi-mode L1 firmware architecture of an innovative mobile wireless communications system. - Develop and implement cellular modem control code and advanced features in areas such as mobility management, Inter-RAT, Inter-frequency ENDC, NRDC, Multi-SIM, Radio Resource Management, Multi-carrier PHY channel configuration and scheduling, Radio Link Monitoring, Beam Management. - Implement key scheduling and control processing in tight timelines under low latency, memory and energy constraints. - Work with other Firmware and Protocol Stack Engineers, Systems Engineers and Product Architects to collaborate on design and requirements, interface definitions and new features. - 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 powerful tools for build, formal verification and test.

Education & Experience

Bachelors degree in Electrical Engineering, Computer Science or related experience is required.

Additional Requirements