Senior Design Engineer

Juul Labs; San Francisco (CA); On-site; USD 165,000 - 227,000; Full time

Benefits offered by this job

A place to grow your career.

Equity and bonuses.

401(k) plan with company matching

Excellent medical, dental and vision

Job summary

Juul Labs is seeking a Senior Mechanical Engineer, R&D to drive design, validation, and optimization of next‑generation products. You will balance aesthetics, cost, reliability, and manufacturability while leading prototyping, testing, and cross‑functional collaboration across engineering, design, and supply chain.

The ideal candidate has 8+ years in mechanical engineering, experience with regulated products, and strong Python and DoE skills.

Qualifications

• 8+ years of relevant Mechanical Engineering experience in product design, release, test, or manufacturing support.
• Preferred experience with medical devices or other regulated products.
• Minimum 5 years experience working with overseas suppliers and CM partners, designing and ramping high-volume parts and assemblies.

Responsibilities

• Lead design, analysis, documentation, and validation of mechanical components and assemblies with prototyping.
• Work with cross-functional teams to meet product requirements and timelines.
• Drive DoEs and validation plans across mechanical, electrical, firmware, and software disciplines.
• Interface with suppliers and CM partners for DFM, tooling, and qualification of parts.
• Coordinate with Quality and Manufacturing to ensure reliability targets and test plans are met.
• Travel domestically and internationally (20–30%) to support manufacturing builds.

Skills

Python data acquisition

Firmware modification

Statistical analysis

Design of Experiments

FEA

CFD

Cross-functional teamwork

Problem solving

Education

BS in Mechanical Engineering

MS in Mechanical Engineering

Tools

SolidWorks

Job description

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 Senior Mechanical Engineer, R&D will be joining an incredibly talented group of mechanical engineers on our R&D 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.

This is a hands‑on role that will be responsible for designing new products that are innovative, cost efficient, reliable, and ship on schedule. The successful candidate will drive the validation of concepts via early analysis, prototyping and testing, and work with cross‑functional teams to ensure that product requirements are managed to achieve optimal experiences for our customers. In addition, the Senior Mechanical Engineer, R&D will work closely with internal and external partners to technically define designs and ensure that all product and project requirements are met. Furthermore, the successful candidate 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. The successful candidate will be comfortable sketching and prototyping new ideas and be familiar with engineering best practices, concepts and procedures. The person in this role 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.

KEY RESPONSIBILITIES

• 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
• Experienced with embedded control systems and adept at deriving meaningful insights through data analytics to drive improvements in existing algorithms
• Root cause analysis and corrective action implementation as a result of build issues and reliability testing
• Takes initiative and ownership of high level work
• Negotiates and drives 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
• Domestic and international travel required to support manufacturing builds 20‑30%, travel percentages may vary based on business needs
• Conduct and manage rapid feasibility studies to design for mechanical robustness, schedule, and cost
• Facilitate design reviews
• Work directly with part suppliers on DFM, tooling kick‑off, tool bring‑up, and tool/part qualification
• Work directly with our CM or prototyping partners in support of system assembly build activities
• Work with Quality and Manufacturing Engineering to define and implement validation testing plans and ensure all products meet reliability requirements
• Ensure successful development of mechanical tooling and production part qualification (i.e. first‑article inspections, manufacturing process capabilities (Cp/Cpk), (GR&R), material certifications, etc.)

PERSONAL AND PROFESSIONAL QUALIFICATIONS

• 8+ years of relevant Mechanical Engineering experience in one or more of the following areas: product design, new product release, test engineering, manufacturing support.
• Preferred experience with medical devices or other regulated products
• Minimum 5 years experience working with overseas suppliers and CM partners, specifically designing and ramping high volume parts and assemblies
• Possess strong functional proficiency in Python for data acquisition, and sensor‑log analysis
• Ability to comfortably navigate and modify existing firmware branches to enable early‑stage prototype functionality
• Experience 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 with the development and integration of electro‑mechanical components, such as flex circuits, batteries and antennae
• Expertise in one (or more of) the areas of: Statistical Analysis, Design of Experiments, FEA, CFD, Thermal Design, DFMEA, DFA, etc.
• An ability to communicate well with cross‑functional team members, efficiently collaborate to achieve project goals, and contribute to the Juul engineering team.
• Ability to multi‑task as well as focus on detailed problems, and ability to resolve problems.
• Experienced in developing and testing both software applications and mechanical systems, ensuring they work together.
• Preferred expertise in 3D MCAD, Solidworks

EDUCATION

• BS or MS in Mechanical Engineering, or related field.

JUUL LABS PERKS & BENEFITS

• A place to grow your career. We’ll help you set big goals - and exceed them
• People. Work with talented, committed and supportive teammates
• Equity and performance bonuses. Every employee is a stakeholder in our success
• Cell phone subsidy, commuter benefits and discounts on JUUL products
• Excellent medical, dental and vision, disability, and life insurance, plus family support, wellness, legal, and employee assistance program benefits
• 401(k) plan with company matching
• Plus biannual discretionary performance bonuses

Juul Labs is proud to be an equal opportunity employer and is committed to creating a diverse and inclusive work environment for all employees and job applicants, without regard to race, color, religion, sex, sexual orientation, age, gender identity or gender expression, national origin, disability or veteran status. We will consider for employment qualified applicants with arrest and conviction records, pursuant to the San Francisco Fair Chance Ordinance. Juul Labs also complies with the employment eligibility verification requirements of the Immigration and Nationality Act. All applicants must have authorization to work for Juul Labs in the US.

SALARY RANGES: Salary varies by role, level and location, and is dependent on the cost of labor in a given geographic region among other factors. These ranges may be modified at any time.

SALARY RANGE: $165,000 USD - $227,000 USD