Mechanical Product Engineer

Lumilens, Singapore

What you will do

Key Responsibilities

Proto / Engineering Validation Test – Build readiness, BOM validation, mechanical fit checks, first-article inspection at CM.

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Own end-to-end mechanical NPI execution at CMs and Key Suppliers/Partners from proto builds through mass production release and yield stabilization.
Collaborate in material selections, interfaces, and finishes suitable for precision, optical, ESD‑sensitive, and clean manufacturing environments
Lead mechanical DFM/DFA reviews on housing, sheet metal, die-cast, injection-molded, and extruded components — translating design intent into manufacturable specifications.
Ensure clear engineering specifications, drawings, and documentation that communicate design intent across internal teams and suppliers
Develop and own Process FMEAs (PFMEA) and Control Plans for mechanical assembly lines; define inspection criteria, torque specs, and cosmetic acceptance standards (IPC-A-610, Lumilens internal).
Drive tolerance stack-up analysis reviews with CMs and Key Suppliers/Partners to ensure fit, form, and function across multi-vendor supply chains; disposition non-conformances via the MRB process.
Author and manage Engineering Change Orders (ECOs) through Lumilens' PLM system (Arena), coordinating with supply chain, CM, and design engineering for zero-impact transitions.
Conduct CM and Key Supplier/Partner site audits and process capability assessments; track and improve Cpk values for critical mechanical dimensions and sub-assembly operations.
Partner with commodity management and strategic sourcing to qualify alternate mechanical suppliers; conduct supplier technical reviews and first-article qualifications (FAI/PPAP).
Manage mechanical tooling asset lifecycle — injection mold, stamping die, and die-cast tool maintenance, repair, revision, and capacity planning across CM sites.
Collaborate with Lumilens’ Reliability Engineering team to support HALT/HASS, vibration, shock, and thermal cycling qualifications per NEBS GR-63 and Lumilens internal standards.
Drive mechanical cost reduction projects including part consolidation, DFM-driven redesigns, tooling amortization strategies, and regional sourcing optimization.
Develop and maintain Lumilens’ mechanical manufacturing standards, best-practice documents, and CM-facing work instructions.
Mentor junior mechanical product and manufacturing engineers and provide technical guidance on process escalations during high-volume ramp events.

About Lumilens

At Lumilens we are building the critical photonics infrastructure that powers tomorrow’s AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is unlocking a new era of computing - faster, cooler, and massively more efficient.

We’re a well-funded startup backed by Mayfield and led by veterans who’ve built and scaled some of the most transformative technologies in the industry. At Lumilens, we’re developing high-speed photonics products purpose-built to power the future of AI infrastructure and high-performance computing.

This isn’t incremental innovation, it’s a ground-floor opportunity to rethink the optical layer from the silicon up. You’ll work alongside a team of world-class engineers solving some of the hardest challenges in scaling optical systems. If you're looking for mission, momentum, and the chance to make an outsized impact, jump on the rocket ship. We’re just getting started.

Position Overview

We are seeking a hands-on Mechanical Product Engineer to serve as the primary mechanical engineering interface between Lumilens’ hardware design teams and our worldwide contract manufacturers (CM) and supplier network.

In this role you are the mechanical DRI (Directly Responsible Individual) for the manufacturing launch, sustaining, and continuous improvement of Lumilens’ next-generation optical and AI infrastructure. You will own the full arc from early development engagements, through NPI build planning, through volume production release—driving quality, cost, yield, and schedule with the CMs and key suppliers while partnering upstream with Optical, Hardware, and Mechanical Design Engineering teams.

This role focuses on precision mechanical design, product packaging, structural design, thermal/mechanical considerations, and system integration—turning loosely defined requirements into robust, manufacturable hardware.

This position is ideal for an engineer who combines deep mechanical product knowledge with a passion for manufacturing process excellence, supplier development, and cross-functional execution at a global scale. And for someone who enjoys building, debugging, and iterating quickly while contributing to mechanical architecture, detail design, tolerance control, and design-for-manufacturing decisions that impact performance, automation, reliability, cost, and scalability.

Mechanical Product Engineer

What you will do

Key Responsibilities

Mechanical Product Engineer

What you will do

Key Responsibilities

What You Will Do

What you need

Nice to have

Nice‑to‑Have Alignment

Core Technologies, Processes & Tools

Pay and benefits

About Lumilens

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