Optical EVT/DVT Engineer - Photonics for AI Interconnects

CScale; Palo Alto (CA); On-site; USD 150,000 - 250,000; Full time

Benefits offered by this job

Equity

Job summary

CScale is building the interconnect for gigawatt-scale AI. In Palo Alto, we seek an EVT/DVT Engineer to drive optical and photonic experiments that move our photonic hardware from first silicon to design-validated product.

This is a hands-on lab role in a fast-paced engineering build-up. You will stand up new test stations, debug at the bench, and own results end to end, collaborating with photonics design, electronics, packaging, and manufacturing teams to move hardware through build phases on

Qualifications

• BS/MS in Optics, Physics, Electrical Engineering, or a related field with 4+ years of industry experience, or a PhD with 1+ year of industry.
• Strong hands-on experience in optics and photonics experimentation: building and aligning optical setups, fiber handling and splicing, and making repeatable measurements.
• Experience handling and testing semiconductor devices such as laser diodes, photodetectors, modulators, or PICs, including probing and ESD-safe practices.
• Working knowledge of optical test equipment: power meters, optical spectrum analyzers, tunable laser sources, SMUs, and oscilloscopes.
• Comfort in a fast-paced build-up environment: you prioritize, adapt quickly, and get hardware working at the bench.
• Clear documentation and communication of test results to cross-functional teams.

Responsibilities

• Plan and run EVT and DVT campaigns for photonic integrated circuits, lasers, and optical subassemblies with test plans, sample sizes, pass/fail criteria, and reports.
• Design, build, and align free-space and fiber-coupled optical test setups, including fiber-to-chip coupling, polarization control, and power, spectral, and loss measurements.
• Characterize semiconductor optical devices: LIV curves, spectra, SMSR, RIN, responsivity, and dark current.
• Handle bare die, chips on carrier, and wafers safely: ESD control, probing, die attach, and cleanroom or clean-bench practices.
• Run environmental and reliability tests (temperature cycling, thermal sweeps, humidity) and track performance drift.
• Automate measurements and data collection and analyze results to find root causes and feed fixes back to design and process teams.
• Stand up new stations quickly as the program scales, and write procedures so others can run them.
• Work closely with photonics design, electronics, packaging, and manufacturing engineers to move hardware through build phases on schedule.

Skills

Optics & Photonics

Lab testing & measurement

Instrumentation & data analysis

Automation (PyVISA/SCPI)

Education

BS/MS in Optics/Physics/EE

PhD with 1+ year industry

Tools

Power meters

Optical spectrum analyzers

Tunable laser sources

SMUs

Oscilloscopes

Job description

CScale is building the interconnect for gigawatt-scale AI. In Palo Alto, we seek an EVT/DVT Engineer to drive optical and photonic experiments that move our photonic hardware from first silicon to design-validated product.

This is a hands-on lab role in a fast-paced engineering build-up. You will stand up new test stations, debug at the bench, and own results end to end, collaborating with photonics design, electronics, packaging, and manufacturing teams to move hardware through build phases on