Senior Mechanical Engineer

Seeking a Senior Mechanical Engineer with FEA Experience

Turn analysis into better hardware. Simplexity is seeking a hands-on Senior Mechanical Engineer to help advance cutting-edge robotics designs, embedded with our team at a client’s site in Bellevue, WA. In this full-time, on-site role, you’ll use finite element analysis (FEA) to guide design decisions and take improvements from modeling through testing and release-quality documentation.

This is an opportunity to connect simulation with real-world engineering: explain the tradeoffs behind your recommendations, diagnose hardware failures, and optimize designs for manufacturability, cost, assembly, and reliability. You’ll work directly with client stakeholders, suppliers, and manufacturing partners.

WHAT YOU’LL DO

• Perform structural FEA and other relevant analyses, translating modeling results into clear design recommendations and tradeoffs
• Define tests, investigate failures, identify root causes, and rapidly iterate toward working hardware
• Present design tradeoffs, technical risks, engineering decisions, and project progress directly to client stakeholders
• Apply structured quality and problem-solving methods to improve manufacturing performance and reduce field and safety risks
• Coordinate mechanical interfaces with suppliers and contract manufacturing partners to support design execution
• Create and maintain release-quality part and assembly drawings, Bills of Materials, and subsystem design updates
• Adapt to evolving client priorities while delivering on engineering goals throughout a long-term engagement

• Bachelor’s or master’s degree in Mechanical Engineering or a related engineering discipline
• 8+ years of applicable engineering experience
• Minimum of 2 years of finite element analysis (FEA) experience
• Proficiency with FEA software; ANSYS is highly preferred
• Proficiency with a mechanical CAD package; SolidWorks is highly preferred
• An ownership mindset: identify the work needed, manage your priorities, and hold yourself accountable for delivering against a fast-paced schedule
• A positive, client-focused approach and a commitment to ethical conduct
• Ability to work full-time on-site in Bellevue, WA at Simplexity’s client’s site

• Experience using SolidWorks PDM to manage CAD files
• Practical knowledge of manufacturing processes and high-volume production methods, including injection molding, casting, sheet metal, and machining
• Strong understanding of actuators, gear trains, and transmissions
• Experience developing custom actuator or drivetrain solutions, ideally with external vendors
• Strong skills in GD&T (ASME Y14.5), tolerance analysis, and design for manufacturing and assembly (DFM/DFA)
• Hands-on testing, troubleshooting, and root-cause analysis experience
• Experience navigating technical discussions with clients or demanding external stakeholders while remaining a hands-on individual contributor
• Experience performing torque-speed, duty-cycle, inertia, efficiency, life, force, energy, vibration, or thermal analyses
• Experience designing test fixtures, test instruments, or automated mechanical test equipment

• Base salary range: $140K - $160K, depending on years of experience and skill sets
• Excellent Healthcare plan (Medical, Dental, and Vision) fully paid for by the company for the employee; partial payment for dependents 
• 401(k) plan with company match 
• Long-term and short-term disability, AD&D and Life Insurance 
• Paid maternity/new parent leave 
• 11 Paid holidays 
• 3 weeks of paid time off (PTO) per year, increasing after 2, 5, and 9 years of service 

• Hourly rate $100 - $125/hr, depending on experience
• No benefits, holidays, or paid time off (PTO) included

No recruiters please. 

Why join Simplexity Product Development?
Simplifying the Complex. Simplexity is a product development engineering firm that helps leading technology companies bring advanced robotic and automation systems into reliable, scalable production. We reduce cost, improve quality, and strengthen manufacturing readiness for our clients.

You’ll solve challenging manufacturing and hardware-quality problems involving integrated mechanical, electrical, sensing, actuation, and control systems. Our collaborative teams value meaningful work, technical growth, and sustainable work-life balance.

Simplexity is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Diverse candidates are encouraged to apply. 

*** Please be advised that Simplexity Product Development will never ask you to respond to a non-SimplexityPD domain such as a gmail, ymail, hotmail, etc. If you suspect that you have been contacted by someone impersonating Simplexity Product Development who is using a fraudulent email address, please do not reply. If you are not sure, please fill out a contact form at https://www.simplexitypd.com/contact/ to report the incident. ***