Principal Mechanical Engineer – OSFP Module Design

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. Join our experienced team to help shape the next generation of high-speed optical connectivity.

Position Summary

We are seeking an experienced Principal Mechanical Engineer to lead the architecture, design, development, and industrialization of next-generation high-speed optical transceiver modules, including 800G, 1.6T, and future pluggable platforms based on the OSFP ecosystem.

This role requires deep expertise in high-speed electro-mechanical packaging, thermal management, precision tolerance engineering, EMI/EMC compliance, materials engineering, and large-scale manufacturing/NPI execution. You will work cross-functionally with optics, signal integrity, electrical, thermal, manufacturing, reliability, and supplier teams to deliver high-performance products at hyperscale production volumes.

Key Responsibilities

Lead end-to-end mechanical design and development of OSFP transceiver modules and related hardware
Define module architecture, stack-up strategy, mechanical interfaces, retention mechanisms, heat spreaders, cages, and thermal paths
Design precision components using sheet metal, die castings, injection molded plastics, CNC machined parts, and TIMs
Optimize designs for thermal performance, structural integrity, EMI shielding effectiveness, manufacturability, reliability, and cost
Drive advanced thermal solutions for high-power DSP and optical engines
(Optional) Perform thermal simulations using FloTHERM, Icepak, and CFD tools
Develop cooling strategies involving heat sinks, vapor chambers, heat spreaders, liquid cooling interfaces, and advanced TIM selection
Lead reliability validation including thermal cycling, mechanical shock/drop, vibration, HALT/HASS, and environmental testing
Define GD&T strategy and tolerance stack-up analysis for critical thermal and optical interfaces
Design EMI shielding solutions including conductive gaskets, coatings, and grounding strategies
Drive NPI activities from concept through mass production
Establish DFM/DFA guidelines, assembly processes, quality controls, and automation opportunities
Lead supplier qualification and manufacturing transfer activities
Support yield improvement and root-cause analysis using 8D, DMAIC, Fishbone, and DFMEA/PFMEA
Mentor and technically lead engineering teams

Required Qualifications

Bachelor's or Master's degree in Mechanical Engineering or related field
12–20+ years of experience in optical transceivers, networking systems, semiconductor packaging, or data center hardware
Strong expertise in OSFP/QSFP mechanical systems, thermal management, and precision design
Proficiency in Creo, SolidWorks, or NX CAD tools
Strong understanding of GD&T, tolerance analysis, material science, EMI/EMC, and reliability engineering

Preferred Qualifications

Experience with 800G/1.6T optical modules
Knowledge of co-packaged optics or near-packaged optics
Experience with copper alloys, Zamak die casting, advanced TIMs, and thermal materials
Familiarity with OSFP MSA specifications and high-volume manufacturing models
Six Sigma certification or patent publications preferred

Key Skills

Mechanical architecture leadership
Thermal design & simulation (optional)
NPI & manufacturing transfer
Supplier management
Cost optimization / should-cost analysis
DFMEA / PFMEA
Root cause analysis
Program leadership
Executive-level technical presentation skills

Ideal Background / Industries

Optical networking
Hyperscale data centers
Semiconductor systems
Telecom infrastructure
AI server platforms
High-speed interconnect products

What we offer

Competitive salary and significant equity in a high-growth company
Comprehensive health, dental, and vision insurance
Flexible time off policy
Direct impact on groundbreaking technology shaping the future of AI and data centers
Opportunity to work with a highly experienced and collaborative team
Dynamic and innovative work environment
Opportunity for rapid career growth

Lumilens is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, or any other protected characteristic.