Associate Engineer - Battery Chemistry

StealthBatteryCorp.; Santa Clara (CA); On-site; USD 70,000 - 120,000; Full time

Benefits offered by this job

Equity

Flexible time off

Medical insurance

Dental & Vision

HSA

FSA

Job summary

StealthBatteryCorp. seeks an Associate Engineer to support laboratory-scale electrode development and process experimentation. You will design tests across slurry mixing, coating, assembly, and electrochemical evaluation, while collaborating with the pilot team for scale-up.

The role involves glove-box work, handling air-sensitive materials, and adhering to strict safety protocols in a fast-paced lab environment with cross-functional teams. CA-based facility.

Qualifications

• Associate degree or technical certification in manufacturing, materials science, chemistry, or engineering technology; a BS is strongly preferred
• Ability to design and execute SOPs and DoEs with moderate supervision
• Working knowledge of electrode materials and formulations
• Strong analytical thinking and root cause analysis
• Excellent attention to detail and observation skills
• Good documentation and organizational skills
• Comfort with fine powders, solvents, and PPE procedures

Responsibilities

• Design and execute test plans to optimize electrode formulation for processability and electrochemical performance
• Perform root cause investigations and brainstorm solutions
• Prepare and mix electrode slurries with centrifuge, overhead dispersing, and planetary mixers
• Work in glove-box for air-sensitive materials
• Operate lab-scale coating techniques: doctor blade, comma bar, and slot-die coating
• Assemble coin cell/bi-layer pouch cells and run cycle tests
• Conduct electrode characterization: peel, bend, resistivity tests
• Conduct slurry characterization incl. rheology tests and grain gauge
• Assist with process transfer, new tool sourcing and equipment modifications
• Maintain 6S standards and lab cleanliness

Skills

SOP/DoE design

Root cause analysis

Electrode materials knowledge

Attention to detail

Documentation skills

PPE safety procedures

Education

Associate degree or technical certification

BS in chemical/materials/engineering (preferred)

Tools

Rheometer

Force Test Systems

Coin Cell Assembly

Pouch Cell Testing

Job description

About Us:

We are building a world-class foundational science team, founded by former Tesla leadership. We’re a well-funded seed-stage sodium-ion battery company focused on truly redefining the future of energy storage and we are very excited about it.

The Role

We are seeking a hands-on Associate Engineer to support laboratory-scale electrode development and process experimentation. In this role, you will plan and execute formulation DoEs and test plans across slurry mixing, coating, calendaring, cell assembly, electrochemical testing, and electrode-level characterization. The engineer will also support process transfer and scale-up activities in collaboration with the pilot team.

Note:

This role is based in a facility involving exposure to chemical solvents, fine powders, and moving equipment. Requires adherence to strict safety protocols and PPE use.

What You’ll Do:

Design and execute test plans to optimize our electrode formulation for processability and electrochemical performance

• Perform root cause investigations and brainstorm solutions

• Prepare and mix electrode slurries using centrifuge, overhead dispersing, and planetary mixers

• Work in glove-box environment for mixing air sensitive materials

• Operate lab scale coating techniques including - doctor blade drawdown, comma bar coating and small scale slot die coating

• Assemble coin cell/bi-layer pouch cells and put on cycle testing according to defined procedures and test plan

• Conduct electrode characterization work including but not limited to peel test, bend test, resistivity measurement

• Conduct slurry characterization work including but not limited to rheology tests and grain gauge

• Assist with new process development, new tool sourcing and commissioning, equipment modifications as needed

• Follow 6S standards and maintain lab cleanliness and conduct

Qualifications We’re Seeking

• Associate degree or technical certification in manufacturing, materials science, chemistry, or engineering technology. B.S. in chemical, materials science, mechanical engineering or hard science degree strongly preferred

• Ability to design and execute SOPs and DoE’s with moderate support from more senior engineers

• Working knowledge of electrode materials and formulations

• Strong critical thinking skills and experience with root cause analysis

• Strong attention to detail and observation skills

• Good documentation and organizational skills

• Comfort working with fine powders, industrial solvents, and chemical handling procedures

• Ability to work and wear required PPE (respirators, gloves, safety glasses) for extended periods

Bonus / Preferred

• 3+ years of hands-on experience in battery lab-scale development work (high formulation iteration), manufacturing or electrode production

• Experience with and knowledge of polymer science

• Familiarity with electrode and slurry characterization protocols and equipment (Rheometer, Force Test systems)

• Familiarity with coin cell/pouch cell assembly and testing

• Familiarity with slurry mixing equipment (centrifuge, planetary and dual-shaft mixers)

• Experience with NMP or other solvent-based processing and associated safety protocols (ATEX/explosion-proof environments a plus)

• Basic mechanical aptitude - comfortable adjusting equipment settings, troubleshooting minor issues, and performing changeovers.

Work Environment

• Innovative / flexible / yet fast-paced development environment

• Very close collaboration with technical team and stakeholders across the company

• Small, growing, international team from 7+ countries

• Office snacks include healthy options, chips, drinks

• Onsite work schedule currently

Why join:

• Ground-floor opportunity to shape both the science and the culture of a well-funded seed-stage company

• Direct access to founders; no bureaucratic barriers to pursuing bold ideas

• Work on a problem that matters - sodium-ion is one of the most consequential battery chemistries of the next decade

Benefits:

• Competitive salary + meaningful early-stage equity

• Flexible time off (for exempt employees)

• Medical Healthcare Insurance, plus additional coverage offered for family members

• Dental and Vision Insurance, plus additional coverage offered for family members

• HSA (Health Savings Account) option

• FSA (Flexible Spending Account) option