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- 170 000 $ – 235 000 $
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Sr. Wireless Firmware Engineer (Direct To Cell)
Исключительная возможность работать в SpaceX над амбициозным проектом Starlink. Высокая зарплата, акции компании и участие в создании технологий мирового масштаба перевешивают требования к сверхурочной работе.
Сложность вакансии
Высокая сложность обусловлена необходимостью глубоких знаний в области беспроводной связи (LTE/5G), цифровой обработки сигналов и системного программирования на C++, а также строгими требованиями ITAR.
Анализ зарплаты
Предлагаемая зарплата ($170k - $235k) находится на верхнем уровне рыночных ожиданий для Senior-инженеров в Кремниевой долине, особенно с учетом дополнительных бонусов в виде акций SpaceX.
Сопроводительное письмо
I am writing to express my strong interest in the Senior Wireless Firmware Engineer position for the Starlink Mobile program. With over five years of experience in C++ development and a deep focus on wireless signal processing, I am excited by the opportunity to contribute to the Direct to Cell initiative. My background in implementing physical layer algorithms and optimizing software for resource-constrained systems aligns perfectly with SpaceX's mission to provide global cellular connectivity from space.
Throughout my career, I have developed a robust understanding of 4G/5G (LTE/NR) standards and have successfully navigated the complexities of SDR and modem systems design. I am particularly drawn to this role because it combines high-performance software development with cutting-edge wireless engineering. I am eager to bring my analytical skills and passion for interdisciplinary problem-solving to the Starlink team to help overcome the unique challenges of non-terrestrial networks.
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Описание вакансии
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. WIRELESS FIRMWARE ENGINEER (DIRECT TO CELL)
The Starlink Mobile program is working to provide global cellular connectivity from space. As a wireless firmware engineer, you will play a critical role in developing novel wireless signal processing algorithms, implementing optimized software for use on satellites and ground stations, debugging complex systems and performance issues, and developing production software. This is a unique position which will work closely with both wireless systems engineers and protocol firmware engineers to accelerate wireless PHY development and find solutions to interdisciplinary challenges. The ideal candidate will be equally comfortable with wireless signal processing algorithms and high-performance software development.
RESPONSIBILITIES:
- Design and implement physical layer (PHY) algorithms for satellite-based 4G/5G (LTE/NR) eNodeB/gNodeB.
- Develop optimized signal processing algorithms running on resource-constrained CPUs.
- Develop models and run simulations to analyze and validate overall system performance, including modem performance.
- Design, implement, test, maintain, and document the wireless PHY and MAC layers of the protocol stack.
- Identify and debug complex performance issues across the wireless PHY and MAC layers.
- Participate in architecture, design, and code reviews. Contribute to system dimensioning and algorithm design for next generation hardware.
BASIC QUALIFICATIONS:
- Bachelor's, Master’s or PhD degree in computer science, computer engineering, electrical engineering or a STEM discipline.
- 5+ Years of experience with at least 1 of the following: wireless signal processing, modem systems design, wireless systems engineering, DSP (digital signal processing), or physical layer processing (L1).
- 5+ Years of C/C++ coding experience.
PREFERRED SKILLS AND EXPERIENCE:
- Familiarity with 3GPP 4G/5G (LTE/NR) physical layer design or other modern broadband OFDM waveforms such as WiMAX, 802.11 WiFi, DVB-S2, DVB-C, 5G NTN (non-terrestrial networks).
- Familiarity with forward error correction (FEC) coding concepts.
- Basic familiarity with MAC layer (medium access control, L2).
- Development and optimization of complex signal processing algorithms in both fixed and floating point.
- Familiarity with Linux command line use, git-based version control, and python programming.
- SDR (software defined radio) experience.
- Experience supporting products through the full release cycle including commercial deployment.
- Strong skills in debugging and performance optimization; exceptional analytical skills and engineering fundamentals.
- Excellent verbal and written communication skills.
- Ability to work effectively in a dynamic environment with changing needs and requirements.
ADDITIONAL REQUIREMENTS:
- Must be willing to work extended hours and weekends as needed.
COMPENSATION AND BENEFITS:
Pay range:
Software Engineer/Senior: $170,000.00 - $235,000.00/per year
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, stock options, 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 & long-term disability insurance, life insurance, paid parental leave, and various other discounts and perks. You may also accrue 3 weeks of paid vacation & will be eligible for 10 or more paid holidays per year. Exempt employees are eligible for 5 days of sick leave per year.
ITAR REQUIREMENTS:
- To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.
SpaceX is an Equal Opportunity Employer; employment with SpaceX is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.
Applicants wishing to view a copy of SpaceX’s Affirmative Action Plan for veterans and individuals with disabilities, or applicants requiring reasonable accommodation to the application/interview process should reach out to EEOCompliance@spacex.com.
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Навыки
- C++
- Wireless Signal Processing
- DSP
- LTE
- 5G NR
- OFDM
- SDR
- Python
- Git
- Linux
- Algorithms
Возможные вопросы на собеседовании
Проверка фундаментальных знаний в области беспроводной связи, критически важных для разработки PHY-уровня.
Можете ли вы объяснить основные различия между физическими уровнями LTE и 5G NR, особенно в контексте использования OFDM?
Оценка навыков оптимизации кода для спутниковых систем с ограниченными ресурсами.
Какие стратегии вы используете для оптимизации алгоритмов обработки сигналов на процессорах с ограниченными ресурсами (CPU/DSP)?
Проверка практического опыта работы с современными стандартами связи.
Опишите ваш опыт реализации или отладки стека протоколов 3GPP, в частности уровней L1 или L2.
Оценка навыков решения сложных системных проблем.
Расскажите о самом сложном баге в беспроводной прошивке, который вы нашли. Как вы его диагностировали и устранили?
Проверка владения инструментами моделирования.
Как вы используете Python или MATLAB для моделирования производительности модема перед реализацией алгоритма на C++?
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- Страна
- США
- Зарплата
- 170 000 $ – 235 000 $