Mechanical Engineer Intern at Multiply Labs in San Francisco, CA

Join the Future of Robotic Biomanufacturing! Multiply Labs is a robotics company on a mission to solve a significant bottleneck in modern medicine: the manufacturing of life-saving advanced biologics - including cell therapies, gene therapies, mRNA therapies, and more. Currently, advanced biological therapies are produced through manual, labor-intensive processes. This keeps costs astronomical—often exceeding $0.5M-$2M per patient—and limits access to only a fraction of those in need.  As labor scarcity for scientists compound against increased product complexity and sky-high costs of failure, the emergence of robotics and AI makes the automated manufacturing of biologics feasible, reliable, and economically scalable.  We envision that the biomanufacturing factory of the future is fully robotic - closed, automated, and scalable, making therapeutics for some of the most important indications for patients today widely accessible.   Why This Matters We don’t just build robots; we build the infrastructure for the next generation of biologics manufacturing. Our technology allows biopharma companies to scale production without redesigning their science, drastically lowering regulatory hurdles and bringing costs down to a level where these treatments can actually reach patients. The Stack & The Scale The Mission: Build the world’s best robots to make life-saving therapies accessible to all. The Technology: Advanced robotic orchestration, high-precision automation, cloud-integrated hardware-software systems, dextrous manipulation, and imitation learning. The Location: Headquartered in San Francisco, CA. The Backing: Supported by premier investors, including Casdin Capital, Lux Capital, and Y Combinator.

About The Role

As a Mechanical Engineer Intern in the Multiply Labs team, you will apply your engineering expertise to design complex automated machinery involved in the manufacturing of novel pharmaceutical products.

You’ll be working directly with a cross functional hardware and software team on designing and building the current and next generations of Multiply Labs’ robotic systems. This ranges across designing and selecting robotic equipment, determining high level design goals and objectives, building prototypes and taking them to production. You’ll succeed in the role if you can optimize design using first principle engineering approaches. We have a mix of projects running simultaneously. You will need great documentation skills and ability to organize thoughts and ideas into actions in order to drive decision making conversations on major projects while coordinating with colleagues. 

Responsibilities

Ownership of machine and robotic design projects

Strong fundamental engineering concept understanding 

Investigation of applicable technologies and components

Prototyping, testing, and iterating designs

Generation of supporting design documentation

Responsibilities may also include controls and actuator sizing, interfacing, integration, and testing

Proficiency with 3D CAD software, including modeling and creation of detailed drawings

Ability to solve complex technical problems by breaking them down into simpler pieces and executable tasks

Knowledge of mechanical components, common engineering metals, plastics, joining methods, part fabrication methods, and finishing operations

Understanding of manufacturability for assemblies using DFM/DFA principles

Experience

Currently working towards Bachelors of Science in Mechanical Engineering or related field

Strong skills in mechanical fundamentals, creative problem solving, breaking down complex problems, attention to detail, and communication

Experience with CAD (Onshape, Solidworks, etc)

Highly motivated, independent, curious, and eager to learn

Additional preferred experience

Experience in iterating through design cycles from concept through production, including: concept generation, downselection, rapid prototyping, testing, analysis, and manufacturing

Hands-on experience with machine shop and prototyping tools

Experience with FDA and/or EMA regulated industries

Physical & Working Conditions

Ability to reach, stoop, crouch, and kneel; this specifically includes the need to physically enter, stand, or crouch inside a robotic cluster for testing, debugging, or manual intervention

Ability to lift up to 25 pounds (e.g., test fixtures, replacement parts, tools) and lift up to 5 pounds overhead

Manual dexterity required for building and adjusting mechatronic assemblies

Comfortable in a machine shop environment when necessary

Work is split between a standard office setting and a manufacturing/lab area

Adherence to safety protocols and awareness of surroundings is required

Occasional proximity to hazardous materials (e.g., biological agents, cryogenic materials) may occur during specific cell testing validation phases, though direct handling is rare

Ability to wear Personal Protective Equipment (PPE), including lab coats, safety glasses, and gloves, when accessing specific lab or manufacturing zones

This role generally follows a standard schedule but may necessitate occasional evening or weekend work to support critical cluster integration milestones or time-sensitive troubleshooting