
Senior Software Test Engineer - (FSSTE041526.1)
Job Type: Full-time
Pay Range: $120,000.00 to $180,000.00/yr
Location: TX 78613 US (Primary)
Remote/Onsite/Hybrid: 100% Onsite
Security Clearance Required: None
Cimarron is seeking a Senior Software Test Engineer to support our partnership with a commercial aerospace company at their rocket production facility in Cedar Park, TX.
Your role as a Software Engineer on the test team will be critical to the success of Firefly Aerospace Software for use on launch vehicles, spacecraft, and launch facilities. You will use all-digital and hardware-in-the-loop simulation environments to test our Flight and Ground software. This will include testing of software changes where you will act as a formal independent peer reviewer for software changes.
Software
Engineers on the test team will also be responsible for developing and executing formal qualification software tests and certification tests including safety-critical testing as required by the U.S.
Space Force Launch
Facilities and the FAA, for pre and post launch software safety. You will be part of the Aerospace Software Engineering Group and will work closely with Flight Software, Ground Software, and Software Simulation personnel to provide thorough tests for our software before use on a launch vehicle, spacecraft, or launch site.
Key Duties
- Design and develop test procedures for testing our Ground and Flight Software in all-digital and hardware-in-the-loop simulation environments.
- Develop software for automating test case execution and report generation.
- Set up automated testing of daily commits of new Ground and Flight Software and act as a peer reviewer for Merge/Pull Requests.
- Create unit tests for simulation models, Flight Software, and Ground Software.
- Adhere to customer test requirements, whether internal or external.
- Develop and document requireme
Job details
- Type
- Full-time
- Location
- Briggs, TX
- Salary
- $120,000 – $180,000/yr
- Posted
- Jun 10, 2026

