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Lumilens

Photonic interconnects for AI infrastructure

Mechanical Product Engineer

Design EngineeringConfirmed live in the last 24 hours
Full-timeSingapore

About the Job

Requirements

  • A B.S. or M.S. in Mechanical Engineering or Manufacturing Engineering is required.
  • At least 8 years of product or manufacturing engineering experience in networking, servers, telecom, or consumer electronics hardware is required.
  • Deep design-for-manufacturing and design-for-assembly expertise across sheet metal, die casting, plastic injection molding, and extrusions is required.
  • Proficiency in geometric dimensioning and tolerancing per ASME Y14.5 and tolerance stack-up methods, including root-sum-square and worst-case analysis, is required.
  • Hands-on contract manufacturer or original design manufacturer management experience at Tier 1 electronics manufacturing services providers in Asia is required.
  • Experience with process capability analysis, including Cpk, statistical process control, and control charting, is required.
  • Experience managing product lifecycle management and engineering change orders using Agile, Arena, Windchill, or equivalent systems is required.
  • Experience developing process failure mode and effects analyses and control plans is required.
  • IPC-A-610 or equivalent mechanical or cosmetic inspection standards experience is required.
  • Strong written and verbal communication for multi-site, cross-functional teams is required.

Responsibilities

  • Own end-to-end mechanical new product introduction execution at contract manufacturers and key suppliers or partners, from prototype builds through mass production release and yield stabilization.
  • Collaborate on material selections, interfaces, and finishes appropriate for precision, optical, electrostatic discharge-sensitive, and clean manufacturing environments.
  • Lead mechanical design-for-manufacturing and design-for-assembly reviews on housing, sheet metal, die-cast, injection-molded, and extruded components, translating design intent into manufacturable specifications.
  • Ensure engineering specifications, drawings, and documentation clearly communicate design intent across internal teams and suppliers.
  • Develop and own process failure mode and effects analyses and control plans for mechanical assembly lines; define inspection criteria, torque specifications, and cosmetic acceptance standards.
  • Drive tolerance stack-up analysis reviews with contract manufacturers and key suppliers or partners to ensure fit, form, and function across multi-vendor supply chains; disposition non-conformances through the material review board process.
  • Author and manage engineering change orders through the Arena product lifecycle management system, coordinating with supply chain, contract manufacturers, and design engineering for transitions without impact.
  • Conduct contract manufacturer and key supplier or partner site audits and process capability assessments; track and improve Cpk values for critical mechanical dimensions and subassembly operations.
  • Partner with commodity management and strategic sourcing to qualify alternate mechanical suppliers; conduct supplier technical reviews and first-article qualifications or production part approval processes.
  • Manage the lifecycle of mechanical tooling assets, including injection molds, stamping dies, and die-cast tools, covering maintenance, repair, revision, and capacity planning across contract manufacturer sites.
  • Collaborate with the reliability engineering team to support HALT/HASS, vibration, shock, and thermal cycling qualifications per NEBS GR-63 and internal standards.
  • Drive mechanical cost-reduction projects, including part consolidation, design-for-manufacturing-driven redesigns, tooling amortization strategies, and regional sourcing optimization.
  • Develop and maintain mechanical manufacturing standards, best-practice documents, and contract-manufacturer-facing work instructions.
  • Mentor junior mechanical product and manufacturing engineers and provide technical guidance on process escalations during high-volume ramp events.
  • Complete build-readiness, bill-of-materials validation, mechanical fit checks, and first-article inspections at contract manufacturers for prototype and engineering validation test builds.
  • Conduct design validation test activities, including design-for-manufacturing and design-for-assembly reviews, tolerance audits, tooling buyoff, geometric-dimensioning-and-tolerancing deviation handling, and process failure mode and effects analysis launch.
  • Conduct process validation test activities, including process capability studies, yield ramp, packaging qualification, and cosmetic defect-standard development.
  • Execute engineering changes and supplier change management, reduce costs, and support long-term supply continuity during mass production and sustaining.
  • Drive root-cause analysis for prototype, production, and field-reported mechanical issues, delivering containment actions and long-term corrective solutions.
  • Work with product owners and optics, test, electronics, and manufacturing teams to resolve technical tradeoffs, maintain execution timelines, and ramp to high-volume production.
  • Design manufacturing tools, jigs, and fixtures; work directly with fabrication vendors and suppliers to communicate requirements, validate prototypes, and prove in production tooling, jigs, and fixtures.
  • Travel periodically to contract manufacturer and supplier manufacturing sites in Taiwan, mainland China, Malaysia, and Thailand, primarily for new product introduction build events, supplier qualification activities, and yield-ramp escalations.

Desired Qualifications

  • Experience owning system calculations or platform-level mechanical architectures.
  • A background designing automation equipment, test fixtures, or thermomechanical systems.
  • Experience using structured root-cause problem-solving methods such as 5 Whys and Fishbone analysis.
  • Experience building internal tools, configuration logic, or design frameworks to scale engineering output.
  • A master's degree in Mechanical Engineering or Manufacturing Engineering.
  • Experience executing NEBS GR-63 or GR-1089 qualification tests.
  • Knowledge of APQP or PPAP processes, including transfer from automotive to electronics.
  • Six Sigma Green Belt or Black Belt certification, and Lean or Kaizen facilitation experience.
  • Familiarity with liquid cooling and advanced thermal assembly manufacturing.
  • Proficiency with NX, Creo, or SolidWorks 3D CAD.
  • Mandarin Chinese language skills for contract-manufacturer site engagement.
  • PMP certification.

About the Company

Lumilens

Photonic interconnects for AI infrastructure

Lumilens designs and manufactures optical interconnect products to accelerate AI infrastructure. It provides high-density photonic interconnects—such as high-density pluggable, near-packaged, and co-packaged optics—built with in-house silicon photonics to scale GPU clusters in AI data centers. Its products include 800G and 1.6T optical transceivers for AI networking, and it is pursuing broader integration like Electrical-Optical Interposers through a strategic partnership with POET Technologies. The company differentiates itself through vertical integration, custom robotics-driven manufacturing, and AI-optimized production processes that aim to improve yield and supply chain stability. Lumilens targets hyperscalers and large AI providers, seeking to move interconnect bottlenecks from compute to scalable, efficient data-center networks. Its goal is to enable faster, denser GPU connectivity to support growing AI workloads and models.

Company size
51-200
Company stage
Series C
Total funding
$839.5M
Headquarters
San Jose, CA
Founded
2024

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