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Matthew Ren

Mechanical Design Engineer Turning Complex Ideas into Thoughtful, Buildable Products

Bellevue, WA

About Me

I’m Matthew Ren, a mechanical design engineer focused on product development, robotics, and prototyping. I combine CAD, mechanism design, electronics integration, and hands-on fabrication to transform early concepts into functional, refined prototypes. I enjoy solving multidisciplinary problems with close attention to how products work, feel, and are made.

Featured Portfolio

Cirilll Stick

Cirilll Stick

Cirillo is a handheld productivity companion designed to help users build a healthier, more intentional relationship with their phones. By combining distraction-blocking contr

Eddy-current lamp with rising core

Eddy-current lamp with rising core

An interactive lamp that combines the slow, controlled motion of eddy-current braking with the visual sensation of light rising toward the surface of water.

All-Terrain TPU Over-Tire for a Rover

All-Terrain TPU Over-Tire for a Rover

Developed a 3D-printed TPU over-tire system for the Washington University Robotics Club’s rover using commercial scooter hub motors. Through eight rapid prototype iterations,

Talking Goniometer — Audible Joint-Angle Measurement

Talking Goniometer — Audible Joint-Angle Measurement

A senior design project developed to help occupational therapists measure joint angles without repeatedly shifting their visual attention between the patient and a mechanical

Modular 3D-Printed Tool Organizer

Modular 3D-Printed Tool Organizer

A personal design project exploring how everyday storage can be both practical and visually refined. The modular organizer uses tool-specific geometry, stackable interlocking

Wind-Directed Air Sampling Device

Wind-Directed Air Sampling Device

Designed a low-cost, direct-drive cover that enables an air sensor to collect data only when wind arrives from a selected direction, helping researchers isolate potential poll

Modular Liftgate Power & Control Unit

Modular Liftgate Power & Control Unit

Redesigned CADRO’s hydraulic power and control unit for a new generation of electric trucks. By reorganizing the major components around an outward-facing service plane and in

Ninibot — Vision-Guided Robotic Manipulation

Ninibot is a full-stack ROS 2 manipulation system built around a low-cost SO-101 robotic arm. Using a wrist-mounted camera, it locates and grasps a cup, transfers it to an ArU