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Python Test Software Developer Jobs

Firefly Aerospace

Onsite

Software Test Engineer III - Careers At Firefly Aerospace	

	

	

	


	
	
	

	
	
	

		 							
	 
		
	
	
	
	
	
	













						
				
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										<p>Career Opportunities with Firefly Aerospace</p>
<p><em><strong>Come be a part of the 21st Century Space Race!</strong></em></p>
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				<div>Careers At Firefly Aerospace</div>								
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		<h2>Software Test Engineer III</h2>	
	
	
			
		
		      			      	<b>Department:</b>
					Aerospace Software Engineering		      					
		      			      	<b>Location:</b>
					Cedar Park, TX<br />					
		      		      		      		      		      		      		



<div><div><a href="https://apply.hrmdirect.com/resumedirect/ApplyOnline/Apply.aspx?req_id=3678921&source=3678921-CJB-0">START YOUR APPLICATION</a></div><div></div></div>


		
	
		<div><p><strong>ABOUT FIREFLY AEROSPACE</strong></p>

<p>Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space � anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.</p>

<p><strong>SUMMARY</strong></p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p> </p>

<p><strong>RESPONSIBILITIES</strong></p>

<ul>
	<li>Design and develop test procedures for testing our Ground and Flight Software in all-digital and hardware-in-the-loop simulation environments</li>
	<li>Develop software for automating test case execution and report generation</li>
	<li>Setup automated testing of daily commits of new Ground and Flight Software and act as a peer reviewer for Merge/Pull Requests</li>
	<li>Create unit tests for simulation models, Flight Software, and Ground Software</li>
	<li>Adhere to customer test requirements, whether internal or external</li>
	<li>Develop and document requirements, designs, plans, and schedules</li>
	<li>Provide accurate test development milestones and communicate them to the Group</li>
	<li>Use Firefly Aerospace Software Engineering development processes and best practices</li>
	<li>Actively learn new test technologies and techniques and apply them to Firefly Aerospace Software testing</li>
</ul>

<p> </p>

<p><strong>QUALIFICATIONS</strong></p>

<p><strong>Required</strong></p>

<ul>
	<li>Bachelor's degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience, with a strong portfolio demonstrating relevant projects and accomplishments.</li>
	<li>Fulltime Industry experience with formal software testing and reporting</li>
	<li>Good C/C++ and Python knowledge</li>
	<li>Development experience under the Linux operating system</li>
	<li>Knowledge of the Agile Software Development Model</li>
	<li>Use of Git version control on a commercial software product</li>
</ul>

<p><strong>Desired</strong></p>

<ul>
	<li>Advanced degree in Software Engineering, Computer Sciences, or Computer Engineering</li>
	<li>3 to 5+ years of experience with formal software testing and reporting for releases, FQT and/or Software Certification</li>
	<li>Exceptional<strong> </strong>C/C++ or Python development skills</li>
	<li>Experience with software tests running in the Red Hat Enterprise Linux 8 Real-Time operating system</li>
	<li>Practical experience using an Agile Software Development framework like Kanban, SCRUM, or Lean Development</li>
	<li>Experience using Atlassian Confluence, Jira, and Bitbucket</li>
	<li>Experience using the NASA Trick Simulation Environment</li>
	<li>Practice using the GitFlow Workflow</li>
	<li>Working knowledge of DO-178C, NASA NPR 7150.2C, RCC 319-19, or AFSPCMAN 91-710 Vol 3 requirements</li>
</ul>

<p><strong>Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short term disability, and flexible PTO options.</strong></p>

<p><em>To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you 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.</em></p>

<p><em>Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.</em></p>
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<div> </div></div><div>  <br /><a href="//fireflyspace.com">Visit Our Home Page</a> </div><p>© 2026 Firefly Aerospace</p>	<p>
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Software Test Engineer III

Bachelor's in CS/Engineering or equivalent; 3+ years formal software testing; strong C/C++ and Python; Linux; Agile; Git.

Spacecraft Functional Test Engineer I - Careers At Firefly Aerospace	

	

	

	


	
	
	

	
	
	

		 							
	 
		
	
	
	
	
	
	













						
				
				<div>
					<div>
						 
							<div>
								<a href="//fireflyspace.com"></a>
							</div>
																			<div>
																	<div>
										<p>Career Opportunities with Firefly Aerospace</p>
<p><em><strong>Come be a part of the 21st Century Space Race!</strong></em></p>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
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		<h2>Spacecraft Functional Test Engineer I</h2>	
	
	
			
		
		      			      	<b>Department:</b>
					Spacecraft		      					
		      			      	<b>Location:</b>
					Cedar Park, TX<br />					
		      		      		      		      		      		      		



<div><div><a href="https://apply.hrmdirect.com/resumedirect/ApplyOnline/Apply.aspx?req_id=3645524&source=3645524-CJB-0">START YOUR APPLICATION</a></div><div></div></div>


		
	
		<div><p><strong>ABOUT FIREFLY AEROSPACE</strong></p>

<p>Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space � anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.</p>

<p><strong>SUMMARY</strong></p>

<p>We are seeking a <strong>Spacecraft Functional Test Engineer I </strong>to join our Assembly, Test and Launch Operations (ATLO) organization and play a key role in verifying spacecraft performance from integration through launch. As part of the spacecraft test team, you will develop and execute functional test campaigns that validate system and subsystem performance, ensuring each vehicle is flight-ready. This is a hands-on, highly cross-functional role that blends test architecture design, software-driven test execution, and real-time problem solving during vehicle integration and environmental testing.</p>

<p>You�ll work closely with subsystem design teams to define test requirements, develop test scripts and procedures, and build automation that enables repeatable, high-throughput testing across multiple spacecraft programs. This position is ideal for engineers who thrive in dynamic environments, enjoy working across hardware and software boundaries, and are passionate about building reliable spacecraft through disciplined testing.</p>

<p><strong>RESPONSIBILITIES</strong></p>

<p>As a Spacecraft Functional Test Engineer I, you will:</p>

<ul>
	<li>Develop and execute spacecraft functional and system-level test procedures to verify vehicle performance and mission readiness.</li>
	<li>Design and maintain automated test scripts, configurations, and architectures to support efficient test execution across multiple programs.</li>
	<li>Collaborate with subsystem responsible engineers and chief engineers to define test requirements and ensure traceability to verification objectives.</li>
	<li>Support Hardware-in-the-Loop (HWIL) testbed development and maintenance, including defining configurations and integrating hardware/software interfaces.</li>
	<li>Monitor and troubleshoot test results, identifying issues and driving root cause resolution across subsystems.</li>
	<li>Plan and support test operations in cleanroom, environmental, and launch site environments.</li>
	<li>Contribute to data management, telemetry visualization, and results analysis to ensure comprehensive verification and documentation.</li>
	<li>Participate in continuous improvement efforts to streamline test processes, increase automation, and enhance test reliability.</li>
	<li>Support the development of tools, dashboards, and analytics for test performance tracking and data-driven decision making.</li>
</ul>

<p><strong>QUALIFICATIONS</strong></p>

<p><strong>Basic</strong></p>

<ul>
	<li>Bachelor�s degree in Electrical, Mechanical, Aerospace, Computer Engineering, or related field.</li>
	<li>0�2 years of experience in aerospace, electromechanical systems, or test environments (internships, co-ops, or significant academic projects count).</li>
	<li>Exposure to functional or system-level testing through coursework, research, or internships.</li>
	<li>Familiarity with scripting languages such as Python, C++, or similar.</li>
	<li>Basic understanding of hardware/software interfaces and data acquisition systems.</li>
	<li>Strong analytical and problem-solving skills.</li>
	<li>Ability to work effectively in a collaborative, fast-paced environment.</li>
</ul>

<p><strong>Desired</strong></p>

<ul>
	<li>Internship or project experience involving spacecraft, robotics, avionics, or embedded systems.</li>
	<li>Exposure to Hardware-in-the-Loop (HWIL) systems or simulation environments.</li>
	<li>Experience with data visualization or basic analytics tools.</li>
	<li>Familiarity with version control systems (e.g., Git).</li>
	<li>Exposure to environmental testing or hardware integration environments.</li>
</ul>

<p><strong>Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short term disability, and flexible PTO options.</strong></p>

<p><em>To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you 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.</em></p>

<p><em>Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.</em></p>
</div>


			
     <div><div><a href="https://apply.hrmdirect.com/resumedirect/ApplyOnline/Apply.aspx?req_id=3645524&source=3645524-CJB-0">START YOUR APPLICATION</a></div><div></div></div>

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<div><p> </p>
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<div> </div>
<div> </div></div><div>  <br /><a href="//fireflyspace.com">Visit Our Home Page</a> </div><p>© 2026 Firefly Aerospace</p>	<p>
					<a href="https://www.clearcompany.com">
						<i>Applicant Tracking System Powered by</i> 
					</a>
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			</div>

Spacecraft Functional Test Engineer I

Bachelor’s in Electrical, Mechanical, Aerospace, or Computer Engineering; 0-2 years aerospace/test experience; Python/C++ scripting; hardware/software interfaces; problem solving; collaborative.

Spacecraft Functional Test Engineer II - Careers At Firefly Aerospace	

	

	

	


	
	
	

	
	
	

		 							
	 
		
	
	
	
	
	
	













						
				
				<div>
					<div>
						 
							<div>
								<a href="//fireflyspace.com"></a>
							</div>
																			<div>
																	<div>
										<p>Career Opportunities with Firefly Aerospace</p>
<p><em><strong>Come be a part of the 21st Century Space Race!</strong></em></p>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
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				<div>Careers At Firefly Aerospace</div>								
								<div>
						
								
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		<h2>Spacecraft Functional Test Engineer II</h2>	
	
	
			
		
		      			      	<b>Department:</b>
					Spacecraft		      					
		      			      	<b>Location:</b>
					Cedar Park, TX<br />					
		      		      		      		      		      		      		



<div><div><a href="https://apply.hrmdirect.com/resumedirect/ApplyOnline/Apply.aspx?req_id=3641231&source=3641231-CJB-0">START YOUR APPLICATION</a></div><div></div></div>


		
	
		<div><p><strong>ABOUT FIREFLY AEROSPACE</strong></p>

<p>Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space � anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.</p>

<p><strong>SUMMARY</strong></p>

<p>We are seeking a <strong>Spacecraft Functional Test Engineer II </strong>to join our Assembly, Test and Launch Operations (ATLO) organization and play a key role in verifying spacecraft performance from integration through launch. As part of the spacecraft test team, you will develop and execute functional test campaigns that validate system and subsystem performance, ensuring each vehicle is flight-ready. This is a hands-on, highly cross-functional role that blends test architecture design, software-driven test execution, and real-time problem solving during vehicle integration and environmental testing.</p>

<p>You�ll work closely with subsystem design teams to define test requirements, develop test scripts and procedures, and build automation that enables repeatable, high-throughput testing across multiple spacecraft programs. This position is ideal for engineers who thrive in dynamic environments, enjoy working across hardware and software boundaries, and are passionate about building reliable spacecraft through disciplined testing.</p>

<p><strong>RESPONSIBILITIES</strong></p>

<p>As a Spacecraft Functional Test Engineer, you will:</p>

<ul>
	<li>Develop and execute spacecraft functional and system-level test procedures to verify vehicle performance and mission readiness.</li>
	<li>Design and maintain automated test scripts, configurations, and architectures to support efficient test execution across multiple programs.</li>
	<li>Collaborate with subsystem responsible engineers and chief engineers to define test requirements and ensure traceability to verification objectives.</li>
	<li>Support Hardware-in-the-Loop (HWIL) testbed development and maintenance, including defining configurations and integrating hardware/software interfaces.</li>
	<li>Monitor and troubleshoot test results, identifying issues and driving root cause resolution across subsystems.</li>
	<li>Plan and support test operations in cleanroom, environmental, and launch site environments.</li>
	<li>Contribute to data management, telemetry visualization, and results analysis to ensure comprehensive verification and documentation.</li>
	<li>Participate in continuous improvement efforts to streamline test processes, increase automation, and enhance test reliability.</li>
	<li>Support the development of tools, dashboards, and analytics for test performance tracking and data-driven decision making.</li>
</ul>

<p><strong>QUALIFICATIONS</strong></p>

<p><strong>Basic</strong></p>

<ul>
	<li>Bachelor�s degree in Electrical, Mechanical, Aerospace, Computer Engineering, or related field.</li>
	<li>2+ years of experience in spacecraft, aerospace, or complex electromechanical system test environments.</li>
	<li>Hands-on experience developing or executing functional or system-level test procedures.</li>
	<li>Familiarity with test automation frameworks and scripting languages (e.g., Python, C++, or similar).</li>
	<li>Working knowledge of hardware/software interfaces, data acquisition, and telemetry systems.</li>
	<li>Strong analytical and troubleshooting skills with the ability to work across multiple engineering disciplines.</li>
	<li>Ability to work effectively in a fast-paced, collaborative environment supporting multiple spacecraft programs.</li>
</ul>

<p><strong>Desired</strong></p>

<ul>
	<li>Experience with spacecraft-level testing, including power-on, system checkout, and mission simulation campaigns.</li>
	<li>Familiarity with Hardware-in-the-Loop (HWIL) systems, EGSE design, or simulation environments.</li>
	<li>Experience supporting transition from prototype to production-style test operations.</li>
	<li>Background in test data visualization or analytics (e.g., Power BI, Grafana, or custom dashboards).</li>
	<li>Knowledge of software development practices, including version control, code review, and basic code readability.</li>
	<li>Familiarity with continuous improvement and process optimization principles applied to test operations.</li>
	<li>Experience with environmental test coordination, launch campaign support, or post-environmental functional testing.</li>
</ul>

<p><strong>Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short term disability, and flexible PTO options.</strong></p>

<p><em>To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you 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.</em></p>

<p><em>Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status</em></p>
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Spacecraft Functional Test Engineer II

2+ years in spacecraft or complex electromechanical test environments; hands-on functional/test procedures; familiarity with test automation; hardware/software interfaces.

GNC Engineer III Controls Alpha - Careers At Firefly Aerospace	

	

	

	


	
	
	

	
	
	

		 							
	 
		
	
	
	
	
	
	













						
				
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		<h2>GNC Engineer III (Controls), Alpha</h2>	
	
	
			
		
		      			      	<b>Department:</b>
					Aerospace Software Engineering		      					
		      			      	<b>Location:</b>
					Cedar Park, TX<br />					
		      		      		      		      		      		      		



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		<div><p><a><strong>ABOUT FIREFLY AEROSPACE </strong></a></p>

<p>Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space � anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space. </p>

<p><strong>SUMMARY</strong></p>

<p>As a Senior GNC Engineer specializing in controls and autonomy at Firefly, you will design and implement advanced control systems and autonomous flight software for operational launch vehicles. In this role, you will develop and tune attitude control software, support hardware-in-the-loop testing and system integration, and provide technical leadership while collaborating with multidisciplinary teams. This position combines advanced control theory, real-time embedded systems development, and hands-on flight operations support while mentoring junior engineers in a fast-paced operational environment.</p>

<h1><strong>RESPONSIBILITIES</strong></h1>

<ul>
	<li>Design, analyze, and tune launch vehicle attitude control software to ensure stable flight from launch to orbit</li>
	<li>Implement control techniques for mission-critical flight phases using thrust vector control actuators, reaction control thrusters, and aerodynamic surfaces</li>
	<li>Develop control systems accounting for complex launch vehicle dynamics including aerodynamic effects, structural flex modes, propellant slosh, and control structure interaction</li>
	<li>Establish technical standards and validation methodologies for control system design, software development, and hardware-in-the-loop testing</li>
	<li>Conduct stability analysis, sensitivity studies, and performance optimization for control systems under nominal and off-nominal flight conditions</li>
	<li>Support hardware-in-the-loop test campaigns for integrated GNC systems including control algorithm validation, flight software verification, and system-level performance testing</li>
	<li>Drive resolution of complex GNC challenges requiring deep technical expertise and rapid problem-solving</li>
	<li>Provide technical direction on system architecture and serve as subject matter expert for launch vehicle control</li>
	<li>Mentor junior engineers in control theory and flight software development</li>
	<li>Author technical documentation and analysis reports that communicate GNC concepts and results to diverse audiences</li>
	<li>Interface with cross-discipline teams to integrate control software with vehicle hardware</li>
	<li>Serve as a GNC console operator for launch operations and perform post-flight analysis to improve vehicle models</li>
	<li>Champion continuous improvement initiatives for GNC processes, tools, and operational efficiency</li>
</ul>

<h1><strong>QUALIFICATIONS</strong></h1>

<h2><strong>Required</strong></h2>

<ul>
	<li>Bachelor's degree in aerospace engineering, mechanical engineering, electrical engineering, computer science, or related field</li>
	<li>5-10 years of experience in launch vehicle GNC systems with significant depth in attitude control system design or flight software development</li>
	<li>Advanced knowledge of attitude dynamics and control theory, including rotational dynamics, attitude representations, control moment generation, and stability analysis</li>
	<li>Strong understanding of classical control theory and frequency domain analysis techniques</li>
	<li>Expertise in real-time software development using C++ for flight-critical applications</li>
	<li>Experience developing high-fidelity actuator models and attitude control system testbeds</li>
	<li>Proficiency in hardware-in-the-loop testing and requirement verification for flight-critical systems</li>
	<li>Understanding of software development best practices including version control (Git), code documentation, and testing</li>
	<li>Excellent communication and presentation skills</li>
</ul>

<h2><strong>Desired</strong></h2>

<ul>
	<li>Master's degree or PhD in aerospace engineering, mechanical engineering, electrical engineering, applied mathematics, or related field</li>
	<li>Experience architecting and implementing control systems for operational launch vehicles from development through flight</li>
	<li>Expertise in advanced control techniques such as nonlinear control methods, optimal control, model predictive control, or adaptive control applied to launch vehicle applications</li>
	<li>Hands-on experience with launch vehicle actuator systems including thrust vector control actuators, reaction control thrusters, and aerodynamic surfaces</li>
	<li>Advanced knowledge of state estimation techniques including Kalman filtering, sensor fusion, and covariance analysis</li>
	<li>Advanced knowledge of numerical methods for control law tuning, root-solving, and parameter optimization</li>
	<li>Experience with modern flight software frameworks and real-time operating systems</li>
	<li>Software engineering expertise with proficiency in development practices including version control, code review, testing, documentation, and CI/CD workflows</li>
	<li>Proficiency in Python for scripting, data analysis, and automation</li>
	<li>Working knowledge of launch vehicle systems and mission operations</li>
	<li>Proven ability to develop junior engineers while managing technical responsibilities</li>
	<li>Track record of thought leadership through publications, presentations, or contributions to industry state-of-the-art</li>
</ul>

<p> </p>

<p><strong>Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short term disability, and flexible PTO options.</strong></p>

<p><em>To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you 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. </em></p>

<p><em>Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.</em></p>
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     <div><div><a href="https://apply.hrmdirect.com/resumedirect/ApplyOnline/Apply.aspx?req_id=3699723&source=3699723-CJB-0">START YOUR APPLICATION</a></div><div></div></div>

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GNC Engineer III (Controls), Alpha

GNC Engineer

5-10 years in launch vehicle GNC; controls and flight software; C++; HWIL testing; attitude control; strong communication.

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