Mechanical Engineer, Engine Systems

Start the Best Work of Your Career at Boom

At Boom, we’re building the world’s fastest airliner—driven by a team that embraces speed, owns every challenge, and never stops learning. Our propulsion team is pioneering Symphony, a custom engine designed from the ground up for sustainable supersonic flight. To make it real, we need mechanical engineers who thrive on hands-on problem solving—designing, building, and testing the systems that make engine development possible.

In this role, you'll own the design and development of critical engine systems—whether that’s a gearbox, oil circuit, or fuel subsystem. You’ll take your hardware from a clean sheet through analysis, build, and test. If you’ve ever wanted to see your work go from CAD to the control room and play a direct role in firing up a brand-new engine, this is it.

Role Overview

• Design and develop engine subsystems and accessories, such as gearboxes, oil, fuel, or starter systems
• Design and build structural and mechanical elements of the engine test stand and mounting system
• Own your systems end-to-end: from concept to design, analysis, build, and test
• Act as control room operator during ground engine tests, monitoring your systems in real-time
• Build models, assemblies, and detailed drawings in CAD to support manufacturing and assembly
• Create and execute test plans—including instrumentation, data review, and test iteration
• Collaborate closely with design, manufacturing, and test teams to deliver fully integrated systems
• Communicate findings and plans clearly across a multidisciplinary team

Ideal Candidate

• Mechanical or Aerospace Engineering degree (or equivalent experience)
• Strong grasp of engineering fundamentals, especially mechanical, fluid, and thermal systems
• Proficient in CAD for design and drawing generation 
• Demonstrated experience with test planning, data analysis, and hands-on testing
• Clear, confident communicator who thrives in fast-paced, cross-functional environments
• Meticulous attention to detail and system-level thinking
• Deep sense of ownership—you’re driven to understand how things work, and make them better

What Will Set You Apart

• Experience with full product or test system lifecycle—from whiteboard to test data
• Background in aerospace fluid systems, mechanical systems or testing
• Operational mindset—you're comfortable with fast turns, ambiguity, and real-time problem solving
• Passion for sustainable aviation and the future of high-speed flight

We’re hiring at multiple levels of experience—whether you’re early in your career or bring decades of design expertise, we’d love to hear from you.

Compensation

• P3 Level - Typically 5 - 10 years of experience - Base salary range: $107,000 – $135,000
• P4 Level - Typically 10 - 15 years of experience - Base salary range: $133,000 – $169,000

Actual compensation will vary based on factors including, but not limited to, location, experience, and performance. The range listed is just one component of Boom’s total rewards package. Other elements may include long-term incentives/equity, flexible PTO, and a suite of progressive benefits designed to support our employees’ well-being and growth.

There is no set deadline to apply for this job opportunity. Applications will be accepted on an ongoing basis until the search is no longer active.

ITAR Requirement

To conform to U.S. Government aerospace technology export regulations (ITAR and EAR), 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. Learn more about ITAR here.

Boom is an equal opportunity employer and we value diversity. All employment is decided on the basis of qualifications, merit and business need. 

Want to build a faster future? Come join Boom.