Sr Software Test Engineer

| Louisville, CO, USA
Employer Provided Salary: 138,635-207,952 Annually
Salary data is provided by the employer. Please note this is not a guarantee of compensation.
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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.
Responsibilities may include, but are not limited to:

  • Review and analyze software design descriptions, Interface Control Documents (ICDs), and requirements in coordination with development teams
  • Design and architect various aspects of the test campaign
  • Development of test descriptions, test code, and peer reviews
  • Development and review of software code, specifically automated Python test scripts to be leveraged in the Continuous Integration environment
  • Investigate, create, and close software bugs and test product bugs
  • Plan team execution of software release tests, acceptance tests, and qualification tests
  • Collect and report technical, schedule, and cost metrics
  • Directly contribute to software critical path work that will enable first flight milestones including FQT, NASA Joint Tests, and Software Certification
  • Interface with multiple cross-functional teams including Models and Simulations, Software Development, Hardware Development, Labs, Tools, Safety & Mission Assurance, and Program Management
  • Use JIRA for software project management & development
  • Zephyr test case description updates and peer reviews
  • Perform anomaly investigations, test tool integrations, and Software Change Request (SCR) creation, evaluation, and closure
  • Maximizing Artificial Intelligence (AI) within the test flow
  • Managing scope creep and technical debt
  • Mentoring junior engineers


  • Bachelor's of Science degree in Computer Science, Software Engineering or other related discipline and typically 10 or more years of relevant experience
  • Thorough understanding of Computer Aided Engineering tools
  • Demonstrated knowledge of engineering principles and practices
  • Experience working in multi-disciplinary teams
  • The ability to obtain and maintain a Security Clearance may be required. Learn more about the background check process for Security Clearances


  • 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
  • Embedded software test lead experience
  • Leadership in software development for test - directing test descriptions, test code, test procedures
  • Skilled in Python test script development and review
  • Test data and root-cause analysis experience
  • Experience as a technical lead and/or product owner
  • Skilled in systems thinking, data analysis, and verification/validation
  • Experience with Linux/Unix command line interfaces
  • Experience leveraging an Aircraft/Spacecraft simulator as part of a test platform
  • Software-in-the-loop and Hardware-in-the-loop test experience
  • Experience analyzing bus data and network communication protocols such as MIL-STD-1553
  • NASA 7150.2 and/or DO-178 experience
  • Test automation and continuous integration experience
  • Experience with test management tools for requirements tracking, test case tracking, test code reviews, test pipeline configuration and execution, and automated test results
  • Experience planning and directing software release tests, acceptance tests, and qualification tests
  • Avionics hardware integration and test experience with flight and non-flight hardware
  • Flight software integration and test experience
  • Knowledge of Guidance, Navigation & Control (GNC), Command & Data Handling (C&DH), Communications/RF, Electrical Power Systems, Mechatronics, Propulsion
  • 1553, RS422, ethernet, NASA ISS interfaces, MODBUS, CAN
  • Laboratory experience with generic lab equipment and protocols
  • Control Account Management experience and Earned Value Management
  • Configuration management
  • Software classifications and safety criticality, especially for aerospace use
  • Experience with Fault Detection, Isolation & Recovery (FDIR) and Condition Monitors and Action Sequences (CMAS) software
  • LLR and HLR testing
  • Experience with writing, decomposing, and analyzing requirements including high-level (HLR) and low-level (LLR)
  • Experience with component, systems-level, and spacecraft-level testing

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

Application Deadline: This role will remain posted until a pool of qualified candidates is identified.
To conform to U.S. Government international trade regulations, applicant must be a U.S. Citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State or U.S. Department of Commerce.
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:
$138,634.92 - $190,623.01
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.

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Technology we use

  • Engineering
  • Sales & Marketing
    • C#Languages
    • C++Languages
    • JavaLanguages
    • PythonLanguages
    • CLanguages
    • HTMLLanguages
    • BashLanguages
    • DOORSDatabases
    • WordpressCMS
    • Sprout Social CMS
    • DocuSignCRM
    • MailChimpEmail
    • StaffbaseEmail


Based in Louisville, CO with operations in Broomfield, CO, Madison, WI, Durham, NC, Huntsville, AL, Houston, TX, and Kennedy Space Center, FL. Our offices in Colorado are close to Boulder, Broomfield and Denver.

An Insider's view of Sierra Space

What are some social events your company does?

The Young Professionals Group holds social events including happy hour, paint n sip, axe throwing, hiking, ice skating, first time home-buyer info session, ugly holiday sweaters, matching Halloween costumes, picnics, game nights, volunteer events, joint events with other local companies and organizations, and more!


Systems Engineer

What projects are you most excited about?

The Dream Chaser spaceplane is an incredibly exciting project! This vehicle – with a cargo and a crew variant – will revolutionize space travel. It will carry astronauts to destinations in Low Earth Orbit, it will supply cargo and science experiments to the ISS and the Orbital Reef space station, and it can land at many spaceports around the world!


Director Engineering, 4800 - DC100

How does the company support your career growth?

Through my career, my management has continually ensured that I am working on projects that I found interesting, challenging, and enjoyable. My management has my best interests in mind and they want me to be successful. Additionally, my managers have repeatedly fought for my promotion and empowerment to greater responsibility.


DCCS Structures Engineer

What are Sierra Space Perks + Benefits

Sierra Space Benefits Overview

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

Sierra Space offers 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.

Volunteer in local community
Open door policy
OKR operational model
Team based strategic planning
Open office floor plan
Documented equal pay policy
Health Insurance + Wellness
Flexible Spending Account (FSA)
Disability insurance
Dental insurance
Vision insurance
Health insurance
Life insurance
Wellness programs
Mental health benefits
Financial & Retirement
401(K) matching
Performance bonus
Child Care & Parental Leave
Generous parental leave
Family medical leave
Company sponsored family events
Vacation + Time Off
Generous PTO
Paid holidays
Office Perks
Onsite office parking
Relocation assistance
Onsite gym
Professional Development
Job training & conferences
Tuition reimbursement
Lunch and learns
Promote from within
Mentorship program
Online course subscriptions available

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