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Sr / Principal Flight Software Engineer

Sierra Space

Sierra Space

Software Engineering
Multiple locations
Posted on Tuesday, July 2, 2024

Sierra Space Careers: Dare to Dream

We honor those that are not afraid to dream big dreams, those that tenaciously chase their dreams even when others say it cannot be done, those that achieve big dreams and change everything. Those are Dreams Worth Chasing.

At Sierra Space we envision a future where humanity lives and works in space, on moons, and on distant planets. Our mission isn’t restricted to the few, instead we see a future where all people can choose to live, work, discover and explore beyond our planet. Our company is building a platform in space to benefit life on Earth and together we will alter the course of humanity.

We have a bold mission. We are a bold company. Together, we are an extraordinary team.

About the Role

Do you enjoy developing new products and services? Join us! Our Software Engineers work in an agile, collective environment. You will be using your skills and expertise to define, design, develop, test, certify and improve cutting-edge software products. These cover a very wide range from advanced mission payloads and electronic systems through highly integrated aircraft to orbital and space exploration systems. You'll perform coding, debugging, testing, and troubleshooting of systems and software throughout our development process. Your technical duties involve the design and development of new software products throughout the product lifecycle.

Sierra Space’s Orbital Mission and Services (OMS) division focuses on the design, build, and operations of small satellites in support of commercial services and national security space and offers two work locations: Louisville, Colorado and Centennial, Colorado.

As a Flight Software Engineer, your primary responsibility will be designing and developing flight software and algorithms solutions for spacecraft missions for both civilian and DoD applications. These designs stem from understanding, analyzing and evaluating satellite and constellation capabilities, mission concepts, and system requirements. Your work will ensure we meet customer requirements by making data-driven decisions in architecting, implementing and testing the design in a testbed prototype and subsequent delivery of the flight code. Along the way, you will contribute to analyses of various architectures that include space vehicles, satellites, sensors, communications, and ground infrastructure; evolving or creating new approaches based on analysis results. You will also contribute to evaluating the mission effectiveness of the candidate approaches, balancing mission objectives against factors such as development and lifecycle costs.

The Software Engineer participates in all portions of the software life cycle (concept development, requirements definition, design, development, testing, and deployment) of flight software to support ongoing and future small satellite programs. This individual must have a strong working knowledge of object-oriented design using C++ and must have a strong background in developing flight code on embedded processors. The ideal candidate will have recent experience with at least one real-time operating system (such as VxWorks) and be familiar with both asymmetric and symmetric multiprocessing architectures. The candidate must also be comfortable working in an Agile Scrum environment.

About You

Our mission is driven by the unwavering passion to push the boundaries of what is possible. We seek those who Dare to Dream — to envision the extraordinary and pursue it relentlessly – to join us on this transformational journey.

We’re looking for dreamers who align with our values, vision, and audacious goals – while also meeting the minimum qualifications below. The preferred qualifications are a bonus, not a requirement.

Minimum Qualifications:

  • Bachelor of Science degree Computer Science, Software Engineering or other related discipline and typically 14 or more years of relevant experience

  • A higher-level degree may substitute for experience

  • Advanced capabilities using Computer Aided Engineering tools

  • Demonstrated knowledge of engineering principles and practices

  • Experience working in multi-disciplinary teams

  • The ability to obtain and maintain a Top-Secret U.S. Security Clearance is required

Preferred Qualifications:

  • Strong technical understanding of C++

  • Experience with industry standard software languages such as Python

  • Experience with spacecraft flight software development

  • Demonstrated experience leading a team developing software

  • Experience with software tools for requirements tracking, code reviews, static analysis, library and artifact repository, and automated build

  • Knowledge of software development methodologies such as Agile/Scrum

  • Experience and knowledge of Software Design Patterns

  • Experience using SysML/UML to create Software Designs

  • Experience testing and debugging on both Software in the Loop (SITL) and Hardware in the Loop (HITL, on target platform) environments

  • Experience with Configuration Management platforms (GIT, SVN)

  • Experience developing on a Real Time Operating System (VxWorks preferred

  • Technical leadership or managerial experience is a plus

Estimated Salary Ranges:

Principal - $159,430 - $219,216

Sr Principal - $183,344 - $252,098

Physical/Mental/Emotional Requirements:

  • Frequently walk, sit, stand, climb stairs and steps

  • Frequently repeat same hand, arm, and finger motion many times to include finger and hand dexterity

  • Rarely lifting or carrying up to 20 lbs.

Working Conditions:

  • Rarely exposed to outdoor elements (high/low temperatures, sun, rain/snow, etc.)

  • Rarely exposed to fumes or hazardous chemicals/materials

  • Rarely exposed to loud noises


This position requires the ability to obtain and maintain a Top-Secret U.S. Security Clearance. U.S. Citizenship status is required as this position needs an active U.S. Security Clearance for employment. Non-U.S. Citizens may not be eligible to obtain a security clearance. The Department of Defense Consolidated Adjudications Facility (DoD CAF), a federal government agency, handles the adjudicative aspects of the security clearance eligibility process for industry applicants. Adjudicative factors which affect the outcome of the eligibility determination include, but are not limited to, allegiance to the U.S., foreign influence, foreign preference, criminal conduct, security violations and illegal drug use.

Elevate Your Career

At Sierra Space, we are committed to your personal and professional development. We empower you to make profound and meaningful contributions and foster a vibrant culture of collaboration, where teamwork ignites breakthrough innovations.

Sierra Space offers annual incentive pay based upon performance that is commensurate with the level of the position.

We also offer a generous benefit package, including medical, dental, and vision plans, 401(k) with 150% match up to 8%, life insurance, 3 weeks paid time off, tuition reimbursement, and more.

At Sierra Space we are at the very doorstep of unlocking the future and the work in front of us is hard, but it is truly important and meaningful. Achieving our mission requires dedication, relentless pursuit of a dream and an unwavering passion for pushing the boundaries to accomplish what others might believe to be impossible. We seek those who too, Dare to Dream and will join us in a pursuit to achieve the extraordinary.

Application Deadline: This role will remain posted until a qualified pool of candidates are identified.