Sr. Mechanical Design Engineer

Rheo Sense, Inc. (Rheo Sense) is a leading scientific instrumentation company specializing in high‑precision microfluidic viscosity measurement technology. Our innovative VROC® platform is trusted by researchers, engineers, and scientists across biotechnology, pharmaceuticals, materials science, and advanced manufacturing.

We are committed to delivering accurate, reliable, and user‑friendly measurement solutions that empower our customers to accelerate discovery, improve product performance, and drive scientific advancement.

At Rheo Sense, we foster a collaborative, fast‑moving environment where innovation, continuous improvement, and customer focus guide everything we do. As we continue to grow, we’re looking for talented individuals who are excited to contribute to cutting‑edge technology and make a meaningful impact in the scientific community.

Please note:

This job posting was updated and revised effective April 17, 2026.

Sr. Mechanical Design Engineer

On-Site Position (No Remote Option)
Corporate Office:
San Ramon, California
Relocation Assistance:
No (Local Candidates Are Encouraged to Apply and Will Be Given Preference)
Closing:
Continuous Recruitment. We are accepting and reviewing all qualified applicants who meet the minimum requirements listed in this announcement for consideration on an ongoing basis.
Application Screening Process:
Your application will not be considered if you fail to meet the minimum qualifications listed below or do not submit a detailed cover letter and resume as required for the application screening process.
Salary: $120,000 - $155,000 per year.

Successor candidates’ starting base will be determined based on permissible, non‑discriminatory factors such as skills, experience, and geographic location. It is not typical for an individual to be hired at or near the top of the base range for this role.

You are a skilled mechanical engineer who combines strong technical ability with creative problem‑solving. You communicate clearly, work well with cross‑functional teams, and adapt quickly in fast‑moving environments. You take ownership of your work, move comfortably from concept to prototype, and bring a practical, hands‑on approach to developing advanced instrumentation.

The Sr. Mechanical Engineer is responsible for planning and executing mechanical engineering tasks for the product development of advanced instruments. This individual will be working closely with other members of our interdisciplinary team developing innovative advanced related products and technologies. The candidate must be a fast learner, strong problem solver, and exceptional communicator. This position will require you to translate ideas into high‑level design concepts and working prototypes.

The candidate must have a proven ability to understand complex problems and requirements as described by customers, product liaisons, scientific and engineering team members.

• Design all advanced instrument parts and assemblies using SOLIDWORKS to meet specifications and for Design for Manufacturability (DFM) on integrated microfluidics, pneumatic, and liquid handling systems.
• Create test fixtures for Design of Experiments (DOE) as well as Verification, and Validation processes.
• Perform experimental testing and analyze resulting data.
• Lead project teams in the preparation of engineering inputs, cost estimates, schedules, and project management.
• Prepare for, and participate in, comprehensive design reviews.
• Evaluate performance at the component and system levels via both SOLIDWORKS modeling and hands‑on experimental methods.
• Develop and execute component reliability and qualification tests.
• Develop quality procedures to support the manufacturing team in pilot builds and troubleshooting during production.
• Write engineering change orders on existing products to improve designs and correct problems.
• Meet deadlines, sustain superior personal task management, and deliver consistent high performance.
• Perform other department‑specific duties as assigned.

• Bachelor's degree in mechanical engineering or other closely related…