Flight Software Engineer II

About the role

Quantum Space is redefining mobility and maneuverability in space. Our high-mobility spacecraft platforms support national security, civil, and commercial missions with unmatched flexibility and propulsion capability. We build fast and iterate quickly.

Who We’re Looking For

We are seeking a Flight Software Engineer to design, develop, integrate, and test embedded software that powers our spacecraft and payload systems. You will work across subsystem teams to implement flight behaviors, command sequences, and on-orbit functionality that directly impact mission success. This role is ideal for an engineer who thrives in a fast-paced, iterative environment and who enjoys working at the interface of software, hardware, and operations.

Where You’ll Make an Impact

Develop flight and payload software for embedded spacecraft systems running VxWorks and Linux.

Debug and integrate software with hardware subsystems across a variety of communication interfaces and protocols.

Collaborate with avionics, payload, propulsion, and GNC leads to implement subsystem behaviors in flight software.

Work with mission operations and ground software teams to design scheduling logic, command sequences, and autonomous behaviors.

Support hardware-in-the-loop (HIL) testing, system integration, and functional verification of spacecraft software.

Document software behaviors, interfaces, and workflows to ensure cross-functional alignment across engineering teams.

Operate effectively in a schedule-driven, rapid development environment

What It Takes

BS in Computer Science, Computer Engineering, or related field

3+ years of experience with C++ or another object-oriented programming language

Proficiency in Python for scripting, testing, and automation

Strong experience working in a Linux development environment, including but not limited to:

Shell scripting (bash)

Networking/IP

Serial/UART interactions

System-level debugging

Experience with Git and Git-based workflows such as GitLab

Familiarity with Agile software development processes

Ability to rapidly understand, navigate, and contribute to a large, previously developed codebase

Nice-to-Have Experience

5+ years of C++ development experience

Experience developing flight software or other spacecraft-related software (ground tools, test frameworks, payload apps)

Background in embedded systems development

Experience with Docker or other containerization tools

Familiarity with common spacecraft interfaces such as I2C, RS-422/485, LVDS, SpaceWire, MIL-1553, Ethernet

Experience with Rocket Lab MAX FSW

Hands-on experience with VxWorks or other real-time operating systems (RTOS)

What You’ll Get

Ownership – Build and shape the core software that executes on orbit and drives our mission capabilities.

Impact – Contribute directly to spacecraft behavior, autonomy, and mission execution.

Innovation – Work across hardware, software, and operations to develop the next generation of on-orbit systems.

Growth – Expand your technical depth in embedded systems, flight software, and spacecraft operations.

Compensation – Competitive salary, equity, and comprehensive benefits including medical, dental, vision, generous leave, HSA, 401(k) matching, and equity sharing.

Location: Rockville, MD; or Hawthorne, CA; or Denver, CO

Base Salary: $100,000 - $150,000

The salary range for this role is an estimate based on a wide range of compensation factors. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of Quantum Space's total compensation package.

Additional Requirements

To comply with U.S. Government space technology export regulations, including ITAR, applicants must be a U.S. citizen, lawful permanent resident, protected individual per 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

Apply now. Join us in building the next generation of spacecraft.