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Principal Software Engineer (Spacecraft Flight Software)

Sierra Space

Sierra Space

Software Engineering
Louisville, CO, USA
Posted on Monday, June 24, 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.

Primary Responsibilities:

  • Assess new spacecraft designs to determine detailed, low-level software requirements
  • Conducts multidisciplinary research and collaborates with equipment designers and/or hardware engineers in the planning, design, development, and utilization of electronic data processing systems for product and commercial software
  • Determines computer user needs; analyzes system capabilities to resolve problems on program intent, output requirements, input data acquisition, programming techniques and controls; prepares operating instructions; designs and develops compilers and assemblers, utility programs, and operating systems
  • Estimate cost and schedule for spacecraft flight software development activities
  • Ability to oversee subcontracted efforts
  • Ability to provide technical leadership to small work teams
  • Ability to trade multiple approaches to meeting mission requirements to find the best fit based on varying criteria
  • Develop embedded flight code using standard RTOS runtime components and development tools
  • Support functional testing of completed software items
  • Originate software architecture documents, verification and validation plans, procedures, reports, and other documentation in support of flight software design and development activities
  • Ensure compliance of flight software designs with Engineering performance specifications
  • Execute spacecraft flight software design and development activities consistent with Customer quality, cost, and schedule requirements
  • Read and interpret technical specifications
  • Prepare material for and present technical information at design reviews
  • Work with other engineers to implement operating procedures, resolve system issues, and provide required technical information
  • Understand, plan, and execute technical activities in accordance with SNC policies, procedures, and work instructions

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
  • Relevant work experience may be considered in lieu of required education.
  • Advanced capabilities using Computer Aided Engineering tools
  • Demonstrated knowledge of engineering principles and practices
  • Experience working in multi-disciplinary teams
  • Active Top Secret US Government security clearance with SCI eligibility


Preferred Qualifications:

  • Understanding of industry standard software languages such as C, C#, C++, HTML, Java, Python, and Bash
  • 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, Waterfall, and Spiral
  • Proficient with data structures

IMPORTANT NOTICE:

This position requires current/active 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.

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

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.

Estimated Starting Salary Range:

$159,430.15 - $219,216.46

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.