SlipstreamJobsFresh Startup & VC-Backed Jobs

Mechanical Design Engineer II

Astro Mechanica - San Francisco, CA, USA - In-office - posted 2026-10-21

Apply on the company site

SlipstreamJobs tracks this role from the company's public career site. Apply directly on the employer's site.

Astro Mechanica is a vertically integrated aerospace company developing scalable technology platforms for critical infrastructure and advanced flight systems. Backed by leading venture investors including Andreessen Horowitz, Giant Step Capital, United Airlines Ventures, and Voyager Ventures, the company operates as a team of generalist engineers with deep subject matter expertise in a flat organizational structure. In this role, you will own the mechanical design of engine components and subsystems for Duality™, Astro Mechanica's jet engine designed for efficiency from takeoff through supersonic flight. You will carry designs from early prototype through flight qualification, vehicle integration, and aircraft flight testing, embodying a test-like-you-fly philosophy throughout. Key responsibilities include: - Owning mechanical design of engine components and subsystems, from trade studies through detailed design and release - Weighing system-level impacts in design trades while collaborating closely with propulsion, aircraft, and test teams - Completing detailed design work and supporting structural, thermal, and fluid analyses - Presenting design reviews and incorporating stakeholder feedback to strengthen designs - Assembling prototypes firsthand, designing supporting tooling, and writing work instructions - Testing hardware and analyzing data to verify requirements and performance - Diagnosing hardware problems quickly and driving corrective actions The company values in-office collaboration and expects five days per week on-site as an essential part of the role. REQUIREMENTS: - 3+ years of hands-on mechanical design experience, taking hardware from concept through build and test - Proficiency in solid, surface, and sheet metal CAD modeling in a major CAD package (Siemens NX preferred; experience with CATIA, Creo, or SolidWorks transferable) - Strong knowledge of manufacturing processes, including machining, additive manufacturing, and sheet metal, along with precision measurement and GD&T - Working understanding of structural analysis, heat transfer, and fluid mechanics - Track record of designing parts that were built, tested, and improved based on test results - Comfort in fast-paced environments where priorities change as test results come in - High standards for detail and quality in work NICE TO HAVE: - Experience with propulsion systems such as gas turbines, rocket engines, or turbomachinery - Experience with high-temperature, high-speed rotating, or pressurized hardware - Familiarity with data acquisition and instrumentation - Exposure to electromechanical systems or power electronics integration - Experience with flight hardware or qualification testing

Similar roles