---
title: 'Senior/Staff Process Engineer (Wafer Dicing & Back-grind) at Lumilens'
canonical: 'https://feeny.ai/job/senior-staff-process-engineer-wafer-dicing-back-grind-lumilens-singapore-x7ndepxkpsq1'
type: 'job'
last_seen: '2026-09-14'
---

# Senior/Staff Process Engineer (Wafer Dicing & Back-grind) at Lumilens

- **Company:** Lumilens
- **Location:** Singapore
- **Employment:** full-time
- **Posted:** 2026-09-11
- **Last confirmed live:** 2026-09-14
- **Apply:** https://jobs.ashbyhq.com/lumilens/12f8ffb4-4583-42d3-9e86-9f04984b6b0a

## Job description

Core Responsibilities

- Responsible for silicon photonic wafer backside grinding/thinning process, laser stealth dicing process and die sorting development for silicon photonic chips, with OSAT or internal line.
- Optimize wafer thinning thickness, grinding speed, cutting path and laser cutting parameters to avoid chip crack, edge chipping and optical structure damage of silicon photonic wafers.
- Solve process abnormalities in wafer thinning and dicing processes, including wafer warpage, surface scratch, incomplete cutting and chip breakage.
- Monitor wafer thickness uniformity, cutting quality and production capacity, carry out continuous process optimization to improve product yield.
- Evaluate process compatibility between wafer grinding/stealth dicing and bumping & flip-chip processes, optimize process integration to avoid subsequent process failure attributed to front-end process variations.
- Compile process SOP, WI, failure reports and engineering change documents; support NPI new product introduction and process verification.

## Key Requirements & Qualification

- Education: A Bachelor or Master degree in Materials Science, Chemical Engineering, Mechanical Engineering, Microelectronics, or an equivalent technical discipline
- Experience: 3 to 6+ years of hands-on process engineering in wafer mounting, wafer dicing, wafer thinning or grinding, especially in handling advanced packaging wafers with more complex topology or stack
- Experience working with external equipment and material suppliers to develop equipment and materials needed to support new assembly requirements. Characterize, qualify and bring the process up for mass production
- Familiarity with SPC, JMP data analysis, and DOE matrix design for process development and problem identification and solving using meticulous fixing methods

## 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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