Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.

Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!

If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.

Lightmatter is (re)inventing the future of computing with light!

You will architect and optimize the core of our cutting-edge semiconductor products, overseeing a team of experts specializing in Thermo-mechanical design. This critical role demands a seasoned leader experience managing complex analysis functions, responsible for establishing state-of-the-art simulation methodologies, ensuring error-free tape-outs and driving innovation that directly influences our technology roadmap and competitive edge. If you possess a deep understanding of advanced 2D/2.5D & 3D packaging, excel in managing people and vendor relationships, and are eager to define the future of technology

Responsibilities

• Lead and manage a cross-disciplinary team of 6- 8 engineers with expertise across thermal & thermo-mechanical analysis, and mechanical design domains

• Develop and implement state-of-the-art analysis techniques to provide accurate, predictable, and high-confidence thermal and thermo-mechanical analysis. This encompasses photonic and electronic chips (PIC, EIC), advanced 2.5D and 3D Co-Packaged Optics (CPO) packages, and the complex interactions within these systems

• Develop validation techniques and drive appropriate data collection activities (in-house and in collaboration with external labs) to deliver high confidence in analysis outcomes

• Participate in design reviews at program levels and publish documents to support evidence-based indicators of risk levels at each program level milestone

• Establish and evaluate group accomplishments against defined objectives and key results

• Maintain and develop capabilities by recruiting appropriate talent and continuing to review employee’s skill set requirements & training to meet business needs.

• Ensure a safe, secure, and legal work environment

• Responsible for employee performance management and development

Qualifications

• MS or PhD in Mechanical Engineering, or a closely related field is required

• A minimum of 8+ years of demonstrated domain expertise in Thermal and Mechanical Design, including proficiency in simulation techniques such as Finite Element Analysis, is essential

• At least 5 years of verifiable experience in leading and managing a multi-physics engineering analysis team is necessary

• Expertise in the development of advanced (2.5D, 3D, CPO) package assembly and test processes, with a proven ability to address reliability challenges through rigorous analysis, design of experiments and guiding failure analysis.

• Proficient in lab-scale validation techniques, material characterization and expertise in the use of simulation or MCAD tools such as Solidwork, Ansys, or Flotherm

• Extensive experience in collaborating with external vendors and suppliers is required

• A solid understanding of software tools and requisite IT infrastructure is preferred

Preferred Qualifications

• Knowledge of EDA tools such as Mentor Graphics, Allegro

• Ability to work independently, lead a team, and manage multiple projects simultaneously

• Strong communication skills and a track record of successful collaboration in cross-functional team environments

• Creative thinker with strong problem solving skills

We offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.

Salary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.$213,000—$262,000 USD

Benefits

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

• Short Term & Long Term Disability

• Training & Development

• Commuter Benefits

• Flexible, hybrid workplace model

• Equity grants (applicable to full-time employees)

Benefits eligibility may vary depending on your employment status and location. Lightmatter recruits, employs, trains, compensates, and promotes regardless of race, religion, color, national origin, sex, disability, age, veteran status, and other protected status as required by applicable law.

Export Control

Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.