Ran Optimization Engineer Jobs (NOW HIRING)

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars.

SR. RAN SOFTWARE ENGINEER (STARLINK MOBILE)

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. StarlinkMobile 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 Sr. RAN Software Engineer on the Starlink Mobile program, you will lead the validation and optimization of the 4G/5G RAN software protocol stack. This role requires strong software engineering skills to build scalable test automation frameworks and work directly with other software developers to triage and resolve complex 4G/5G protocol stack software issues.

RESPONSIBILITIES:

• Lead the design, development, and maintenance of CI/CD test automation frameworks foreNB/gNBfeature validation, including functional, performance, interoperability, and regression testing
• Analyze UE and eNB/gNBlogs to debug and root‑cause RAN issues, and collaborate with developers to resolve issues and drive feature improvements
• Build software tools and data pipelines to analyze RAN performance and optimize eNB/gNB parameters to improve network KPIs
• Manage and prioritize network issues while collaborating closely with development teams to drive resolution
• Troubleshoot and maintain RAN lab infrastructure in collaboration with partner teams

BASIC QUALIFICATIONS:

• Bachelor’s degree in a STEM discipline
• 5+ years of Python/C/C++ coding experience
• 5+ years of experience developing, executing, and managing automated LTE/5G-NR test cases (including test planning and results tracking)

PREFERRED SKILLS AND EXPERIENCE:

• In-depth knowledge of 3GPP specifications and R17+ RAN features
• Experience with user equipment (UE) log analysis and associated software tools (QXDM/XCAL)
• Experience developing test automation frameworks or CI/CD pipelines
• Strong understanding of LTE and 5G-NR protocols with hands‑on experience resolving software issues at the PHY, MAC, and RRC layers
• Experience supporting products through the full release cycle including commercial deployment
• Strong skills in debugging and performance optimization; exceptional analytical skills and engineering fundamentals

COMPENSATION AND BENEFITS:
Pay Range: Level 3: $175,000.00 - $280,000.00

Your actual level and base salary will be determined on a case‑by‑case basis and may vary based on the following considerations: job‑related knowledge and skills, education, and experience.

Base salary is just one part of your total rewards package at SpaceX. You may also be eligible for long‑term incentives, in the form of company stock or long‑term cash awards, as well as potential discretionary bonuses and the ability to purchase additional stock at a discount through an Employee Stock Purchase Plan. You will also receive access to comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short and long‑term disability insurance, life insurance, paid parental leave, and various other discounts and perks. You may also accrue 3 weeks of paid vacation and will be eligible for 10 or more paid holidays per year. Employees accrue paid sick leave pursuant to Company policy which satisfies or exceeds the accrual, carry‑over, and use requirements of the law.

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