
Spacecraft Software Simulation & Test Engineer - Millennium Space Systems
El Segundo, CAFull-time$83–123K/yrPosted 1 day agoStill listed today
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Job overview
The Software Test Engineer supports Millennium Space Systems’ Flight Software Team by analyzing, designing, and testing software products. The role reviews customer and subsystem requirements, develops test plans and cases, executes automated testing, and investigates failures across flight hardware and emulated environments. It also maintains test-result documentation, verifies defects, evaluates integrations, and recommends corrective actions. The position is Level 1 and is expected to be 100% onsite.
Skills & qualifications
Skills
Qualifications
Benefits
Full job description
Spacecraft Software Simulation & Test Engineer - Millennium Space Systems
Company: Millennium Space Systems
Millennium Space Systems, a part of Boeing Defense, Space and Security (BDS), is a fast, agile small satellite company focused on national security space. Our missions have direct impact on global security, like missile warning and Earth observation.
Our team is curious, bold and innovative. We take risks, innovate and explore new techniques and technologies. We influence change because we challenge the status quo. And when we watch our satellites launch, we know each one of us made it happen.
Job Summary: As a Software Test Engineer, you will support the Flight Software Team in analyzing, designing, and testing of software products for Millennium Space Systems. This position will review functional requirements and user stories from the customer and other subsystems, design test plans, write test cases, oversee test strategies and perform testing for assigned applications.
This position will also submit and verify defects, maintain documentation of test results to assist in debugging and modification of Millennium Space Systems software, analyze test results to certify existing functionality and integrations and recommend corrective action upon failures. We are looking for someone who wants to find ways to break our software.
Position Responsibilities:
- Develop comprehensive test plans and detailed test cases to validate requirements and system performance
- Design, write, and execute automated test scripts
- Debug software and test failures on flight hardware and in emulated environments
- Analyze test results to verify functionality, investigate anomalies, and recommend corrective actions
- Own and optimize GitLab CI/CD pipelines for automated test execution and reporting
- Support additional program and team objectives as needed to ensure mission success
This position's internal job code is Software Engineer-Embedded. Our team is currently hiring for Level 1
This position is expected to be 100% onsite. The selected candidate will be required to work onsite at one of the listed location options.
Basic Qualifications (Required Skills/Experience):
- Bachelor’s degree or higher in Computer Science, Systems Engineering, or a related technical discipline
- 1+ years of software testing experience
- Experience writing automated tests
- Experience with Python, C and/or C++
- Experience with Git and GitLab
- Experience with continuous integration
- This position requires the ability to obtain a U.S. Top Secret Security Clearance for which the U.S. Government requires U.S. Citizenship. A Final Top Secret Clearance is required post start.
Preferred Qualifications (Desired/Skills/Experience):
- Experience in writing test documents (test plans/procedures, SQA plans)
- Experience in designing functional and non-functional test cases that verify requirements and validate functionality
- Experienced in test result evaluation, reporting and metrics
- Excellent analytical, debugging, problem-solving and root-cause analysis skills
Conflict of Interest: Successful candidates for this job must satisfy the Company’s Conflict of Interest (COI) assessment process
Drug Free Workplace: Millennium Space Systems, a Boeing Company, is a Drug Free Workplace (DFW) where post offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria is met as outlined in our policies.
Total Rewards: At Millennium Space Systems, a Boeing Company, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent. Elements of the Total Rewards package include competitive base pay and variable compensation opportunities.
Millennium Space Systems also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work.
The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, and the applicability of collective bargaining agreements. Pay is based upon candidate experience and qualifications, as well as market and business considerations
Summary Pay Range:
- Level 1: $82,500 - $123,000
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.
Category = Engineering
Language Requirements: Not Applicable
Education: Not Applicable
Relocation: Relocation assistance is not a negotiable benefit for this position.
Export Control Requirement: If the successful candidate is not a “U.S. Person” (as defined by 22 C.F.R. § 120.62 “U.S. Person” includes U.S. citizens and U.S. nationals, lawful permanent residents, refugees, or asylees) and the position requires access to export-controlled data, an appropriate export authorization by the U.S. Government may be required prior to such access. Employment, and the continuity of employment of non-U.S. persons, is contingent upon the company’s ability to secure and maintain the necessary export control authorization.
Safety Sensitive: This is not a Safety Sensitive Position.
Security Clearance: 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.
Visa Sponsorship: Employer will not sponsor applicants for employment visa status.
Contingent Upon Award Program This position is not contingent upon program award
Shift: Shift 1 (United States of America)
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How this job compares
Set against the 40,155 open Software Engineer jobs on Olive Jobs, counted November 11, 2026.
- Pay
- This posting$83–123K/yr
- California median$164–243K/yr6,964 salary ranges
- US median$133–216K/yr32,033 salary ranges
This range's midpoint, $103K, is 50% below the California median midpoint ($205K) — in the lowest quarter of Software Engineer salary ranges in California.
- Openings
- Olive Jobs lists 8,558 open Software Engineer jobs in California and 40,155 across the US. 8% of them nationwide are listed as remote or flexible.
- Experience
- This posting asks for at least 1 year of experience — less than three in four Software Engineer postings that state a minimum ask for (median 5 years, across 33,026 postings).
- Education
- This posting asks for a bachelor's degree; 12,547 of the 40,155 open Software Engineer jobs (31%) ask for a bachelor's degree or higher.
Counted across the open, public US postings on Olive Jobs on November 11, 2026. Pay medians are the middle values of the low ends and of the high ends of postings that list both ends of a range in the same cadence (a yearly salary or an hourly rate); a range's midpoint is halfway between its ends. Pay and experience figures resting on fewer than 20 postings are left out.
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