Senior Principal Software Engineer - TS/SCI

Rocket Lab’s Space Systems team is responsible for every satellite and satellite component made by Rocket Lab: from complete satellites destined for missions to the Moon and Mars, to the individual components and subsystems that make up a satellite like solar panels, flight software, reaction wheels and star trackers, separation systems, radios, and more. Our Space Systems team is made up of engineers, technicians, and designers who design, create, and put together our own satellites for missions across the commercial, government, and defense sectors, or who build and assemble satellite hardware and software that supports other satellite missions., * Lead Software Architecture Design:Define and evolve the end-to-end software architecture for flight and ground systems, ensuring scalability, reliability, security, and mission success.

• Develop Flight Software:Design application software for spacecraft operating withinReal-Time Operating Systems (RTOS)such as VxWorks, orembedded Linux, including hardware drivers for spacecraft sensors and actuators such asIMUs,Star Trackers, andReaction Wheels.
• Build Ground Software Systems:Architect and deploy web-based ground software platforms for spacecraft operations, integrating flight and ground systems to support diverse mission profiles.
• Test and Validate Systems:Develop unit tests within aContinuous Integration (CI)framework and collaborate with hardware-in-the-loop test engineers to verify combined software and hardware functionality.
• Collaborate and Lead:Provide technical direction and mentorship to engineering teams, act as a trusted advisor to leadership, and partner with stakeholders to align software systems with mission requirements.
• Support On-Orbit Operations:Ensure software performance in harsh environments and contribute to mission-critical operations.

Based out of our headquarters in Long Beach, CA, we are seeking a highly skilled and experienced Senior Principal Software Engineerto serve as the Chief Software Engineer for a major constellation program. In this pivotal role, you will lead the design, development, and delivery of scalable, reliable, and mission-critical software systems for space-based applications. With expertise in flight software, embedded systems, and ground software systems, you will collaborate with systems teams, software engineers, and stakeholders to ensure mission success. If you have a passion for aerospace and defense, hold an active TS/SCI clearance, and thrive in fast-paced environments, this is your opportunity to make a tangible impact on national security and space exploration., * Bachelor’s degree in engineering, computer science, or a related technical discipline.

• 15+ years of professional software development experience, including embedded systems and ground software.
• Proven expertise in architecting scalable and reliable software systems for aerospace or defense applications.
• Proficiency inCandC++for embedded software development and python for testing.
• Experience with both DIO and AIO (Digital and Analog Inputs and Outputs).
• Experience with integrating hardware, including implementing ICDs, and debugging.
• Experience with deriving the Flight Software architecture from the electrical design including reading a master ICD list and/or schematics.
• Experience with RF ground to space communication.
• U.S. citizenship is required, due to program requirements
• ActiveTS/SCI clearanceis required, * Advanced degree in aerospace engineering, computer science, or a related field.
• Strong systems-level thinking with the ability to balance technical trade-offs across performance, security, and maintainability.
• Experience developing software and drivers withCAN/CAN-FD, SpaceWire, and/orUDP/TCPprotocols.
• Experience leading teams and working with program management to plan out work and staffing.
• Expertise in microservice architectures, distributed systems, and modern web frameworks such asFastAPI.

• Full-stack development experience, including:

• Backend:Golang, and/orRust.
• Frontend:TypescriptandAngular.
• Database:InfluxDB,PostgreSQL, or equivalent.

Familiarity with CCSDS standards, includingSpace Packet Protocol,COP-1, andCFD.

Experience designing software for autonomous vehicles operating in harsh environments, such as satellites or autonomous vehicles.

Expertise in Git-based workflows, CI/CD pipelines, and Kubernetes orchestration.

Understanding of modern authentication/authorization frameworks (e.g., OAuth).

$198,000-$297,000 USD life insurance, parental leave, paid holidays, sick time, 401(k), retirement plan United States, California, Long Beach Jul 25, 2026, This position may require prolonged periods of sitting, standing, walking, computer work, and occasional exposure to moderate levels of noise, dust, and fumes in production areas.

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 component of our total rewards package at Rocket Lab. Employees may also receive company equity and access to a robust benefits package including: top tier medical HMO, PPO & a 100% company-sponsored medical HSA plan option, dental and vision coverage, 3 weeks paid vacation and 5 days sick leave per year, 11 paid holidays per year, flexible spending and dependent care savings accounts, paid parental leave, disability insurance, life insurance, and access to a 401(k) retirement plan with company match. Other perks include: Discounted employee stock purchase program, subsidized EV charging stations, onsite gym, food and drinks, and other discounts.

Eligibility for benefits may vary based on employment status, please check with your recruiter for a comprehensive list of the benefits available for this role. Benefit programs are subject to change at the company’s discretion. Base Pay Range (CA Only) $198,000 - $297,000 USD

Rocket Lab is an end-to-end space company delivering responsive launch services, complete spacecraft design and manufacturing, payloads, satellite components, and more - all with the goal of opening access to space. The rockets and satellites we build and launch enable some of the most ambitious and vital space missions globally, supporting scientific exploration, Earth observation and missions to combat climate change, national security, and exciting new technology demonstrations.

Our Electron rockethas become the second most frequently launched U.S. rocket annually and has delivered more than 230 satellites to orbit, all while we work to develop Neutron, our upcoming medium-lift, reusable launch vehicle for larger constellation deployment. Our Space Systems business designs and builds our extensive line of satellites, payloads, and their components, including spacecraft that have been selected to support NASA missions to the Moon and Mars and components used on the James Webb Space Telescope.