Senior Optical Sensing Engineer - Wilton, CT, United States
$117,750 - $173,000 USD yearly
Originally posted 8 October 2026 by the employer.
About the role
This role involves developing advanced sensor technology for ASML’s semiconductor metrology systems.
What you'll do
- Design and improve optical sensors operating in complex environments.
- Design and model optical systems using CODE V, Zemax, or comparable optical design software.
- Perform optical tolerancing, wave-propagation modeling, partial-coherence calculations, and other physical optics simulations.
- Develop polarization models and error budgets to evaluate optical performance and system risks.
- Process and analyze sensor data using MATLAB or comparable data-analysis tools.
- Build, align, test, qualify, and troubleshoot complex optical and photonic sensor systems.
- Design test stands, including concepts, error budgets, hardware selection, and system realization.
- Investigate technical issues, determine root causes, and support new product introduction and field escalations.
What you'll need
- Bachelor’s degree in optical engineering, physics, or a related technical field, plus four years of relevant experience; OR master’s degree plus two years of relevant experience; OR a doctoral degree.
- Optical design and tolerancing using CODE V, Zemax, or comparable software.
- Physical optics modeling using FRED, MATLAB, or comparable simulation software.
- Optical sensor alignment using collimators, mechanical measurement tools, or interferometers.
- Optical metrology test design, test stand development, and hardware integration.
- Optical technologies including polarization devices, relay optics, objectives, light sources, fibers, cameras, and detectors.
- Data processing, performance trending, and technical root-cause analysis.
This role has been open 2 days — well below the 50-day median for Hardware Systems Engineering roles.
Hardware Systems Engineering · AI ML Hardware
|
Open roles in category
940
|
Median days open
50 d
|
Median salary
$158k
|
See the full market breakdown ▾Category comparison, and who else is hiring
| Metric | ASML | All employers we track in this specialty (940 roles · 103 employers) |
|---|---|---|
| Open roles in this specialty | 35 | 940 |
| Open roles in the wider Software, Firmware & Systems family | 62 | 6025 · 146 employers |
| Median days open | 25 d | 50 d (−25 d vs this employer) |
| Median salary (USD postings) | — | $158k |
Who's hiring in this category
- Intel Corporation · 70 open roles · median 30 d
- KLA Corporation · 59 open roles · median 39 d
- Applied Materials · 50 open roles · median 59 d
- NVIDIA · 49 open roles · median 65 d
- Teradyne · 48 open roles · median 23 d
- AMD · 43 open roles · median 59 d
How we counted: 940 open Hardware Systems Engineering (AI ML Hardware) roles from 103 employers tracked in the SemiconductorJobs index, counted 11 Oct 2026. Specialty figures count only roles carrying this exact specialty label, so an employer's related work in neighbouring specialties is not included there — it is counted in the wider Software, Firmware & Systems family row. Figures refresh nightly.