Senior Spacecraft Software Engineer

Millennium Space Systems
El Segundo, CA

Company Overview
Millennium Space Systems, A Boeing Company delivers affordable, high-performance space systems for exacting customers. At Millennium, you will be part of a close-knit team working on exciting technological problems. We work in an open environment where ideas are shared across all disciplines, and there are ample opportunities for advancement based on excellence. Superstars are welcome.

At Millennium, we innovate and collaborate to make the world a better place. From the seabed to outer space, you can contribute to work that matters with a company committed to fostering an environment for every teammate that's welcoming, respectful and innovative, with great opportunities for professional growth. Find your future with us.

Job Summary
As a Senior Spacecraft Software Engineer at Millennium Space Systems, you’ll create the software that makes our satellites function in orbit. Your code will run on our custom avionics, process signals from sensors like our star trackers, and command actuators like the propulsion system. Your software may also interface with custom payloads and perform high-level autonomy functions to ensure our spacecraft accomplish their missions. We are looking for software engineers that can lead a small team developing the software for a satellite, work with other teams to determine what the software needs to do, and then write (and test!) robust embedded C/C++ to meet those requirements. And when that code is running in space, you’ll continue to support mission operations with software updates and enhancements.

This position's internal job code is SWE - Embedded. Our team is currently hiring for Level 4-5.

Responsibilities


  • Work collaboratively with hardware, control and system engineers to define and develop software requirements, architectures and designs suited for fault-tolerant spacecraft

  • Rapidly prototype novel software solutions to prove out the architecture/design concepts, quantify technical risk, and create new capabilities

  • Implement designs in C/C++, integrate software components, create and run unit tests, validate on Hardware-in-the-Loop and release real-time embedded solutions

  • Assist with system verification and qualification, assessing the outputs and documenting the results to ensure software products that meet system requirements and mission-critical standards

  • Be responsible for all phases of software development and problem resolution from program inception to post-launch support

  • Work with hardware engineers to verify hardware-hardware and hardware-software interfaces

  • Break down the software development needed for a program into smaller discrete tasks that can be given to others to implement and monitor their progress

  • Perform code reviews to insure the software being developed is functionally correct, efficient, and meets our coding standards

Minimum Qualifications


  • Bachelor's Degree in Computer Science, Computer Engineering, Electrical Engineering or similar with focus on software development

  • 7+ years of experience in C and C++ programming

  • 5+ years of experience with Linux in an embedded environment and/or baremetal C on a microcontroller

  • Experience with concurrent HW/SW development

  • Ability to work effectively in a dynamic environment with changing needs and requirements

  • Ability to work independently and in a team, take initiative, and communicate effectively

  • This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim and/or final U.S. Top Secret Clearance Post-Start is required.

Preferred Qualifications


  • Experience with iterative and/or agile development processes

  • Experience with serial data protocols (HDLC, I2C, SPI)

  • Experience in Python programming

  • Experience in Verilog and FPGAs

  • Experience with git, JIRA, confluence

  • Knowledge of satellite systems and components

  • Has an active S or TS clearance

Summary Pay-Range
Please note that the salary information shown below is a general guideline only of what is reasonably expected to be paid for the position. Salaries are based upon candidate experience and qualifications, as well as market and business considerations.


  • Level 4: $141,950 - $208,750

  • Level 5: $172,550 - $253,750

Before applying, please note:
Millennium is DDTC-registered, ITAR-compliant Company. This position is located at a facility that requires special access. Applicants MUST be U.S. citizens and eligible for a security clearance. Additionally, applicants must be willing to apply for and maintain a security clearance. We encourage all interested candidates to apply for any open position for which they feel they are qualified.

Posted 2026-02-19

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