RAN Validation Engineer (Starlink Mobile)

SpaceX•Redmond, WA

About The Position

SpaceX is developing a satellite-to-mobile network to deliver ubiquitous cellular connectivity worldwide through the Starlink constellation. We are partnering with mobile network operators globally to provide direct-to-cell service, extending coverage to billions of existing cellular devices. Starlink Mobile was designed to connect the unconnected, and this new product will greatly expand that mission by extending coverage to billions of existing cellular devices. Applications include connecting hikers in national parks, emergency responders, rural communities, remote sensors, and people in emergency situations. As a RAN Validation Engineer on the Starlink Mobile program, you will be responsible for validating and optimizing the 4G/5G RAN software protocol stack. This includes developing automated test cases for feature validation, performing lab and field testing, analyzing and optimizing network performance, and collaborating with developers to resolve complex issues.

Requirements

Bachelor’s degree in a STEM discipline
Strong understanding of LTE and 5G-NR protocols with hands-on experience debugging issues at the PHY, MAC, and RRC layers
Experience with RAN parameter configuration, optimization, and performance analysis
Experience developing, executing, and managing LTE/5G-NR test cases (including test planning and results tracking)
Experience with UE log analysis and associated software tools (QXDM/XCAL)
Experience with RAN lab equipment, including testbed setup and RF troubleshooting
Strong proficiency in Python for test automation and data analysis, along with experience in Linux and code repositories (Git)

Nice To Haves

2+ years of experience with eNB/gNB and/or modem validation
2+ years of lab and/or field experience in new product introduction or product certification
In-depth knowledge of 3GPP specifications and R17+ RAN features
Experience with RAN lab equipment, including testbed setup and RF troubleshooting
Strong skills in debugging and performance optimization; exceptional analytical skills and engineering fundamentals

Responsibilities

Develop and maintain automated test cases and frameworks for eNB/gNB feature validation, including functional, performance, interoperability, and regression testing
Analyze UE and eNB/gNB logs to debug and root-cause RAN issues, and collaborate with developers to drive fixes
Lead UE log collection and field testing to support eNB/gNB feature development
Build software tools and database queries to analyze RAN performance and tune eNB/gNB parameters to optimize KPIs
Manage and prioritize network issues and work with developers to resolve them
Troubleshoot and maintain RAN lab infrastructure in collaboration with partner teams

Benefits

Comprehensive medical, vision, and dental coverage
Access to a 401(k)-retirement plan
Short and long-term disability insurance
Life insurance
Paid parental leave
Various other discounts and perks
3 weeks of paid vacation
10 or more paid holidays per year
Paid sick leave
Long-term incentives, in the form of company stock, stock options, or long-term cash awards
Potential discretionary bonuses
Ability to purchase additional stock at a discount through an Employee Stock Purchase Plan