Sr. Mechanical Design Engineer

About Rheo Sense, Inc.

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.

Sr. Mechanical Design Engineer

Location: Corporate Office – San Ramon, California

Relocation Assistance: None. Only candidates currently residing within commuting distance will be considered.

Closing: Applications are accepted continuously to build a pool of qualified candidates. Applicants who meet the minimum qualifications will be reviewed on an ongoing basis.

Salary Range: $120,000–$150,000 annually.

You are an experienced mechanical engineer with recent, demonstrated success designing and developing complex products, systems, or advanced instrumentation in a fast‑paced environment. You combine strong technical expertise with creative problem‑solving and require minimal ramp‑up time, allowing you to quickly contribute and deliver results. Recent, hands‑on experience using Solid Works is required, with a proven ability to create detailed designs, assemblies, drawings, and prototypes.

You communicate effectively, collaborate seamlessly with cross‑functional teams, and take ownership from concept through prototype and product development. With a practical, hands‑on approach and a track record of execution, you are comfortable navigating ambiguity, driving projects forward, and making immediate contributions to product innovation and engineering excellence.

The Sr. Mechanical Engineer is responsible for planning and executing mechanical engineering tasks for the product development of advanced instruments. The 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.

This is not necessarily an all‑inclusive list of job‑related responsibilities, duties, skills, efforts, requirements, or working conditions. While this is intended to be an accurate reflection of the current job, management reserves the right to revise the job or to require that other or different tasks be performed as assigned.

• 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…