Senior Design Engineer
Juullabs · San Francisco, California, United States · Posted Jul 7, 2026
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THE COMPANY:
Juul Labs's mission is to transition the world’s billion adult smokers away from combustible cigarettes, eliminate their use, and combat underage usage of our products. We have the opportunity to address one of the world’s most intractable challenges through a commitment to exceptional quality, research, design, and innovation. Backed by leading technology investors, we are committed to the same excellence when it comes to hiring great talent.
We are a diverse team that is united by this common purpose and we are hiring the world’s best engineers, scientists, designers, product managers, operations experts, and customer service and business professionals. If the opportunity to build your career is compelling, read on for more details.
ROLE AND RESPONSIBILITIES:
The Sr. Design Engineer will be joining an incredibly talented group of mechanical engineers on our Product Design team tasked with bringing new products and major product improvements to market for JUUL Labs. This is a high-visibility position that will expose you to rewarding challenges and career growth opportunities.
In this hands-on role, you will be responsible for designing new products that are innovative, cost efficient, reliable, and ship on schedule. You will drive the validation of concepts via early analysis, prototyping and testing, and work with cross-functional teams to ensure that product requirements are met to achieve optimal experiences for our customers. You will troubleshoot and make improvements to existing products, and work closely with other members of the engineering staff to create optimal solutions to difficult design, structural, thermal, and battery life issues. You will be comfortable sketching and prototyping new ideas and be familiar with engineering best practices, concepts and procedures. We are looking for someone who is flexible and can respond quickly, energetically, and enthusiastically to changes in a dynamic market landscape. You should be a strong communicator who is able to lead effectively and work effectively with peers and management alike in a high-paced global environment.
Responsible for the overall design, analysis, documentation, and functional validation of mechanical components and assemblies through daily benchtop prototyping; balancing Industrial Design with mechanical constraints.
Derive meaningful insights through data analytics to drive improvements in existing algorithms.
Take initiative and ownership of high-level work, negotiating and driving alignment with product architects, managers, and other key stakeholders across multiple disciplines.
Design, implement, and drive to completion complex system DoEs spanning several engineering disciplines including EE, ME, FW, and SW.
Execute root cause analysis and corrective action implementation as a result of build issues and reliability testing.
Conduct and manage rapid feasibility studies to design for mechanical robustness, schedule, and cost.
Work directly with our CM or prototyping partners in support of system assembly build activities.
Facilitate design reviews.
Travel to support manufacturing builds.
PERSONAL AND PROFESSIONAL QUALIFICATIONS:
5+ years of relevant Mechanical Engineering experience in one or more of the following areas: product design, new product release, test engineering, manufacturing support.
Expertise in 3D MCAD, Solidworks or Onshape preferred.
Skilled in designing consumer-oriented products using a broad range of processes and materials, with an emphasis on cosmetic plastic molding and metal parts (sheet metal, CNC, extrusion, etc).
Experience developing products that integrate electro-mechanical components, such as flex circuits, batteries, and antennas.
Familiarity with: Statistical Analysis, Design of Experiments, FEA, CFD, Thermal Design, DFMEA, DFA, etc.
Ability to multi-task or focus on detailed problems, and tenacity to drive issues until resolved.
An ability to communicate well with cross-functional team members, efficiently collaborate to achieve project goals, and contribute positively to the engineering community.
Domestic and international travel up to 25%.
Self-motivated, team player, with a strong desire to learn new skills and grow.
STRONG CANDIDATES MAY ALSO HAVE:
A proven prototyping background and a hands-on maker mentality that allows you to prototype and test quickly in a lab environment.
Functional proficiency in Python for data acquisition and sensor-log analysis, along with an enthusiasm for leveraging modern AI tools effectively.
Ability to comfortably navigate and modify existing firmware branches to enable early-stage prototype functionality would be favorable.
Leverage existing tools, systems, and/or processes for data collection and analysis.
Background or active interest in food science or food engineering. A general curiosity about phase-changes, fluid dynamics, or food-contact consumer product architecture is a major plus.
EDUCATION:
BS or MS …