---
title: 'Staff Wafer-level Testing Engineer (Operations & Process) at Lumilens'
canonical: 'https://feeny.ai/job/staff-wafer-level-testing-engineer-operations-process-lumilens-singapore-cvp2fdz9w4qr'
type: 'job'
last_seen: '2026-09-07'
---

# Staff Wafer-level Testing Engineer (Operations & Process) at Lumilens

- **Company:** Lumilens
- **Location:** Singapore
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-07
- **Last confirmed live:** 2026-09-07
- **Apply:** https://jobs.ashbyhq.com/lumilens/5d04b231-704f-4ea3-837f-7d4d4f54247f

## Job description

## About Lumilens

At Lumilens, we are building the essential photonics infrastructure that will drive tomorrow’s AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is ushering in a new era of computing that is faster, cooler, and dramatically more efficient. We’re a well-funded startup backed by Mayfield and led by veterans who have built and scaled some of the industry’s most transformative technologies.

## About the Role

This is a critical technical role responsible for the operational execution, process control, and continuous improvement of Lumilens’ wafer-level testing operations. You will serve as a key owner of wafer-level test processes, test flow, manufacturing readiness, production performance, yield, and process optimization, working closely with internal engineering teams and external manufacturing partners to ensure robust, scalable, and efficient wafer-level testing. The role requires a highly analytical and hands-on engineer who can translate product and test requirements into reliable production processes and drive continuous improvement.

## Key Responsibilities

- Wafer-Level Test Process Ownership: Own and continuously improve wafer-level test processes to ensure stable, repeatable, and efficient production execution. Lead the setup, qualification, and day-to-day operation of automated wafer probers, optical alignment systems, and Automated Test Equipment (ATE) for electrical and photonic wafer-level testing.
- Production Operations: Drive day-to-day wafer-level test operations, monitor production performance, identify process constraints, and ensure execution against production plans and quality requirements.
- Test Process Development & Qualification: Develop, optimize, and qualify wafer-level test processes, including test flows, test conditions, process parameters, and operating procedures for new and existing products.
- Process Control: Establish and maintain process specifications, control plans, operating windows, and monitoring methodologies to ensure consistent test performance and minimize process variation.
- Yield Improvement & Failure Debug: Monitor wafer-level test yield and defect performance, identify systematic and process-related losses, and lead improvement activities to increase yield and manufacturing efficiency. Drive effective corrective and preventive actions to prevent recurrence.
- Test Data Analysis: Analyze wafer-level test data to identify trends, abnormal conditions, process shifts, and systematic failures. Establish appropriate metrics and monitoring mechanisms to track production performance.
- Process Documentation: Develop and maintain test process specifications, work instructions, control plans, qualification reports, and other manufacturing documentation required for production execution.
- Cycle Time & Productivity Improvement: Drive improvements in test cycle time, throughput, yield, process efficiency, and overall manufacturing cost without compromising product quality or reliability.
- Continuous Improvement: Lead structured improvement activities using data-driven methodologies such as DOE, SPC, Six Sigma, and root-cause analysis to improve process capability and manufacturing performance.
- Cross-Functional Collaboration: Work closely with product engineering, quality, supply chain, industrial engineering, and program management teams to ensure successful product qualification, production ramp, and ongoing manufacturing execution.

## Requirements & Qualifications

- Bachelor’s degree in Electrical Engineering, Electronics Engineering, Microelectronics, Physics, Optical Engineering, Semiconductor Engineering, or a closely related discipline.
- Minimum 5 years of experience in semiconductor wafer-level testing, wafer sort, test process engineering, manufacturing operations, parametric test process engineering within semiconductor fab, OSAT, high-tech manufacturing environment or silicon photonics environments.
- Strong analytical and problem-solving skills, with demonstrated ability to analyze test data, identify root causes, and drive permanent corrective actions. Proven proficiency in data analysis software (e.g., JMP, Spotfire, Python, R) for yield modeling, statistical process control (SPC), and test time reduction.
- Strong understanding of wafer-level test processes, test flow development, process control, yield management, and production test methodologies.
- Strong cross-functional communication and project management skills, with the ability to drive technical issues to closure across internal and external teams.
- Experience in photonics, silicon photonics, optical devices, or advanced semiconductor packaging is a strong advantage.

## Benefits

- Competitive salary and benefits
- Opportunities for career advancement
- Work with a world-class team solving cutting-edge challenges
- Collaborative and innovative work environment

Lumilens is committed to building a diverse and inclusive workplace. We are proud to be an equal opportunity employer.

## About Lumilens

## Company Overview
- **One-liner**: Lumilens designs and manufactures next-generation photonic interconnects to massively scale AI compute infrastructure.
- **Entity Type**: Private (Series B – led by Accton Technology; prior Series A of $30M from Mayfield and Spark Capital)
- **Headquarters**: San Jose, California, USA
- **Founded**: 2024
- **Founders**: Ankur Singla (CEO), Samuel Liu (VP Products), Ritesh Kapahi (VP/GM India), Dave Friedman (VP Operations)

## Core Business
- **Primary industry**: Photonics / optical interconnects for AI data centers
- **Target customers**: Large-scale AI providers and hyperscale data center operators (B2B, Enterprise)
- **Mission**: “To rapidly innovate in photonics and connectivity architectures to enable the massive scaling of compute infrastructure required to deliver the full potential of AI.”

## Products & Services
- **Photonic Interconnects (Scale-Out & Scale-Up)**: High-density, low-latency optical links that enable cluster-to-cluster and direct GPU-to-GPU connectivity. Supports 100x higher quantity of GPU direct connections than legacy approaches.
  - *Type*: Hardware (silicon photonics modules) + integrated manufacturing
- **Automated Manufacturing Platform**: End-to-end custom robotics and AI-optimized production processes to maximize yield, quality, and supply-chain flexibility.
  - *Type*: Service / Manufacturing capability (in-house)

## Market Standing
- **Valuation/Market Cap**: Not publicly available
- **Key Metric**: Total funding – $30M Series A (June 2024); Series B led by Accton Technology (amount undisclosed)
- **Notable Investors/Partners**: Mayfield, Spark Capital, Accton Technology
- **Growth Signals**:
  - Headcount grew 287% YoY (54 employees as of mid-2025) [linkedin.com]
  - Operations in 8 countries: USA, India, Thailand, Poland, Singapore, Czechia, South Korea, Malaysia
  - 48 active job postings (+23.1% monthly growth) [linkedin.com]
  - Leadership team with deep photonics/networking experience from Cisco, Juniper, Meta, Lumentum, Coherent

## Competitive Advantages
- **In-house silicon photonics development** – full control over design and supply chain
- **Systems-level expertise** – can partner on both scale-out and scale-up architectures
- **Manufacturing automation** – robotics + AI processes enable faster innovation, higher quality, and predictable deployment
- **Standards-based interconnects** – easy deployment into existing infrastructure
- **Manufacturing anywhere** – supply-chain continuity and scalable manufacturing

## Strategic Focus
- Enable massive scaling of AI infrastructure by overcoming electrical/copper limitations with advanced photonics
- Disaggregate GPUs to mitigate power and density challenges in data centers
- Expand manufacturing capacity globally and continue to automate production
- Align product roadmap with industry standards to accelerate adoption

## Why Work Here
- **Culture**: Fast-paced startup environment with deep technical expertise; mission-driven focus on enabling the future of AI
- **Work policy**: In-office (HQ San Jose, CA with Bengaluru, India as major hub) [builtin.com]
- **Perks**: Opportunity to work on cutting-edge photonics, robotics, and AI manufacturing; direct impact on world’s largest AI infrastructure
- **Engineering culture**: Heavy emphasis on silicon photonics, hardware design, robotics automation, and system-level architecture. Teams are led by veterans from Cisco, Juniper, Meta, Lumentum, Coherent.

## Sources
1. [lumilens.com](https://lumilens.com/) – Company overview, mission, leadership, products
2. [lumilens.com/company](https://lumilens.com/company) – Vision, investors, leadership team
3. [builtin.com](https://builtin.com/company/lumilens) – Career page, employee count, year founded, office policy
4. [linkedin.com](https://www.linkedin.com/company/lumilens) – Headcount, funding details, geographic/department breakdown, job trends, talent sources
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/lumilens) – Current job openings (48 listings)

## Other roles at Lumilens

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- [Optical Transceiver Product Engineer](https://feeny.ai/job/optical-transceiver-product-engineer-lumilens-thailand-f5tgy64vcaxr) — Thailand
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