Cellular InterOperability Systems Engineer

Beijing, Beijing, China
Software and Services


Role Number:200127128
The people here at Apple don't just build products - they build the kind of wonder that's revolutionized entire industries. It's the diversity of those people and their ideas that encourages the innovation that runs through everything we do, from amazing technology to industry-leading environmental efforts. Join Apple, and help us leave the world better than we found it. Join the Wireless Technologies and Ecosystems organization and drive innovation that matters. As part of the Wireless team you we will be working on building solutions for Wireless technologies. We are looking for a reciprocal individual who can get results and innovation in a high-paced environment. Someone who can extract extraordinary value from a task otherwise seen as seen routine to others. Dynamic, inspiring people and innovative, industry-defining technologies are the norm at Apple. You should join the Apple Wireless Performance Team if you want to help deliver the next amazing Apple product.

Key Qualifications

  • - 2 plus years of experience as an Interoperability Development and Test or Systems Engineer
  • - Deep knowledge in cellular protocol stack, including but not limited to, PHY/MAC/RLC/RRC/NAS procedures as well as end to end system knowledge (5G NR, LTE, WCDMA)
  • - Past work experience in projects involving infrastructure vendors and/or chipset/OEM
  • - Experience of hands-on experience testing wireless technologies (5G-NR, LTE, UMTS, WiFi-calling, IMS etc.)
  • - Hands-on experience working with cellular infrastructure vendors on algorithm development and feature enhancements
  • - Excellent log analysis, troubleshooting, analytical and problem solving skills
  • - Scripting skills in Perl, Python, Shell is a plus
  • - Proven track record of project work from concept to commercialization
  • - Thrive in a collaborative environment and can clearly communicate while deftly driving multiple projects across many teams
  • - Obsessively passionate and inquisitive, and seek to solve everyday problems in innovative ways
  • - Laser-focused on the smallest details that are meaningful to our customers


The Wireless team is looking for you to have deep knowledge of RF SW, L1 FW, Access stratum and NAS architecture, primarily focussed on advanced LTE systems including 4x4 MIMO, LAA, Carrier Aggregation and beam forming. Familiarity with 5G modem systems/mmWave technology or Cat-M is a huge plus. We expect you to be hands-on relying upon diagnostics, analytics, crowd sourced information, lab/field experimentations as well as code/architecture review to exploit the opportunities for improvement and work multi-functionally with platform architecture, standardization, firmware/protocol development, system test, QA and carrier engineering teams to drive the enhancement proposals and baseband optimizations. You will be required to develop advanced system evaluation and debugging capabilities. Our members enjoy the flexibility to be involved in all aspects of Protocol software - PHY, RF, SIM, NAS, AS and iOS interfaces, to ensure the most robust and customer friendly software.

Education & Experience

PhD/MS degree/Bachelor Degree

Additional Requirements