Senior Mechanical Engineer

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 seeking a hands‑on senior mechanical engineer to work embedded with our team at our client’s site in Bellevue, WA on a cutting‑edge robotics product. You should be skilled in finite element analysis (FEA), ideally using ANSYS, and be able to communicate tradeoffs that affect designs based on modeling results. This position will include making design updates to subsystems to optimize them for manufacturing and creating release‑quality documentation.

• Review, analyze, and optimize preliminary actuator designs for manufacturing, lower cost, ease of assembly, and strong reliability.
• Perform structural finite element analysis or other relevant analyses.
• Define tests, diagnose failures, perform root‑cause analysis, and iterate rapidly to working hardware.
• Present design tradeoffs, technical risks, decisions, and project status directly to client stakeholders.
• Use structured quality and problem‑solving methods to improve manufacturing performance and reduce field and safety risk.
• Coordinate mechanical interfaces with suppliers and contract manufacturing partners.
• Manage and update part and assembly drawings and Bills of Materials.
• Respond to evolving client needs over a long‑term engagement.

• Bachelor’s or master’s degree in Mechanical Engineering or a related engineering discipline.
• 8+ years of applicable experience, including at least 2 years of finite element analysis (FEA).
• Have an ownership mindset and deliver on project goals by figuring out your task list and holding yourself accountable to meeting a fast‑paced schedule.
• Proficient knowledge of ANSYS (highly preferred) or FEA software.
• Proficient knowledge of Solid Works (highly preferred) or equivalent CAD package.
• Demonstrable knowledge of manufacturing processes and high‑volume production methods – injection molding, casting, sheet metal, machining, etc.
• Experience developing custom actuator or drivetrain solutions, ideally with external vendors.
• Strong GD&T (ASME Y14.5), tolerance analysis, and DFM/DFA
• Hands‑on testing, troubleshooting, and root‑cause analysis experience.
• Experience having technical discussions with clients or demanding external stakeholders while remaining a hands‑on individual contributor.
• Strong understanding of actuators, gear trains, and transmissions.
• Positive, client‑focused style and a commitment to ethical conduct.
• Ability to work full‑time on‑site in Bellevue, WA at Simplexity’s client site.

Experience in any of the following areas is a strong plus:

• 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.
• Experience using Solid Works PDM to manage CAD files.

• 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

1099 contractors who have their own registered consulting/contracting business will also be considered:

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

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.