CelLink Corporation · 1 day ago
Senior Design Engineer, Battery Systems
San Carlos, California, United States
Full-time
Onsite
Senior Level
$140K/yr - $160K/yr
5+ years expCelLink is a company that provides electrical systems to leading automotive OEMs and EV manufacturers. They are seeking a Senior Design Engineer to develop battery connection systems for electric vehicles, focusing on design, integration, and collaboration with cross-functional teams throughout the development cycle.
Electric VehicleElectronicsHardwareManufacturing
Responsibilities
Design and build the core components that move power and data through the battery pack, including interconnects, current collector assemblies, busbars, voltage sense harnesses, and flexible circuits
Develop battery modules and pack layouts with a focus on manufacturability, serviceability, cooling, and system-level integration, making sure everything fits and functions inside the vehicle or enclosure
Create and manage detailed CAD models and engineering drawings for interconnects and PCBAs, using GD&T and stack-up analysis to define mechanical and assembly requirements
Work hands-on through the full development cycle, from early prototyping to pilot builds and into production, troubleshooting designs as they evolve
Collaborate closely with cross-functional teams across mechanical, thermal, electrical, and manufacturing engineering
Turn system-level requirements into clear design specifications that meet performance, safety, and regulatory standards
Size and validate power distribution elements (busbars, flex, cables) using simulation and analytical methods like Joule heating and thermal modeling
Select materials and define stack-ups to balance electrical performance, thermal behavior, and mechanical durability
Own and support validation activities, including DVP&R plans, DFMEA reviews, and Design for Manufacturability/Assembly (DFM/DFA) analysis
Serve as a technical point of contact for customers, managing relationships, facilitating design reviews, and ensuring alignment on requirements, timelines, and deliverables throughout the development process
Help lead engineering program management activities, including coordinating with suppliers, managing BOMs, tracking customer milestones, overseeing the design release process, and driving root cause investigations when issues arise
Qualification
Required
Bachelor's degree in Mechanical Engineering, Electrical Engineering, or a related field
Minimum 5 years of experience working with electrical systems in industries such as aerospace, robotics, data centers, medical devices, appliances, or similar
Strong understanding of Li-ion battery cell formats (pouch, prismatic, cylindrical), including behavior, integration challenges, and design tradeoffs
Experience in battery pack design, including series-parallel configurations, voltage/current balancing, and energy density optimization
Proficient in mechanical CAD tools such as SolidWorks, NX, or equivalent
Familiar with cell connection manufacturing techniques such as laser welding, ultrasonic welding, and resistance welding
Knowledge of electrical joint design, mechanical fastening, and insulation strategies specific to battery systems
Understanding of End-of-Line testing requirements (HiPot, continuity, resistance, weld integrity) and ability to communicate them clearly in drawings and tooling documentation for low-volume/prototype builds
Comfortable working with material properties for conductors, insulators, adhesives, and coatings
Strong hands-on prototyping, testing, and troubleshooting skills
Preferred
Experience with flex circuit manufacturing and related materials/processes is a plus
Familiarity with automotive or energy storage validation protocols and reliability testing is preferred
Benefits
Comprehensive medical and dental coverage
Participation in CelLink's discretionary employee stock option plan
Company
CelLink Corporation
CelLink’s high-conductance flexible circuits consolidate busing, fusing, voltage monitoring, and temperature sensing into a single integrated solution.
201-500 employees
H1B Sponsorship
CelLink Corporation has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (10)
2024 (5)
2023 (5)
2022 (8)
2021 (2)
2020 (2)
Funding
Current Stage
Late StageTotal Funding
$659.22MKey Investors
US Department of EnergyWhale Rock Capital ManagementFranklin Templeton
2023-05-12Debt Financing· $362M
2022-02-16Series D· $250M
2021-05-03Series C· $24.72M
Leadership Team
Malcolm Brown
Co-founder and VP Engineering
Recent News
2025-09-12
2025-07-29
Company data provided by crunchbase