What MatX Is Building
MatX's mission is to make the world’s best AI models run as efficiently as allowed by physics, bringing the world years ahead in AI quality and availability.
About the Role
This is a senior-level, highly specialized engineering role focused on the design, qualification, and productization of next-generation optical interconnect technologies for AI scale-up and scale-out networks. The engineer owns the full lifecycle — from component characterization and link budget analysis to system-level bring-up and data center deployment — across the evolving spectrum of optical integration approaches: pluggables, NPO, and CPO.
What You'll Do
Technology Evaluation & Qualification
Validate and productize high-speed copper and optical connectivity solutions for AI accelerator systems; own vendor due diligence and onboarding for new 1.6T products including AEC and pluggable optical transceivers.
Characterize and qualify optical modules across the integration spectrum — DSP Optics, LRO, LPO, NPO, and CPO — for 800G and 1.6T deployment in scale-up AI fabrics
Perform link budget analysis and evaluate performance metrics including TDECQ, OMA, stressed receiver sensitivity, and associated diagnostics.
Component & System Engineering
Develop expertise in transceiver components including CW lasers, SiPh PICs, EML, DSP, passive subassemblies, their failure modes, and characterization methodologies.
Evaluate silicon photonics (SiPh) transceivers, VCSEL-based MMF links, and EML-based SMF solutions for scale-up fabric topologies
Apply knowledge of thermal, mechanical, power, and signal integrity constraints in dense hardware environments.
Scale-Up Network Architecture
Define optical interconnect strategy for AI cluster topologies — rail-optimized, torus, dragonfly, and Clos — at XPU counts from 10K to 1M+
Model and optimize end-to-end link budgets for 1.6T (200G/lane PAM4) across fiber types: SMF, MMF, MCF
Engage with the transition from 1.6T to 3.2T (400G/lane) roadmaps and new form factors emerging with LPO and CPO.
Supply Chain & Vendor Management
Develop familiarity with subcomponent supply chains and global manufacturers, ODMs, and CMs.
Manage technical relationships with optical module vendors (Coherent, II-VI/Coherent, Lumentum, Innolight, HG Genuine, Eoptolink) and silicon photonics suppliers
Drive NPI (New Product Introduction) qualification plans, yield improvement, and reliability testing with manufacturing partners
What We're Looking For
Experience & Education
BS/MS/PhD in Electrical Engineering, Optical Engineering, Physics, or Photonics
7–12+ years in optical interconnect engineering, with at least 3 years focused on data center or AI fabric applications
Hands-on experience qualifying 400G, 800G, or 1.6T optical modules in production environments
Deep knowledge of PAM4 signal theory, SerDes architecture, and optical link physics at 200G per lane
Proficiency in optical test equipment: BERT, OTDR, optical spectrum analyzers, sampling oscilloscopes (e.g., Keysight 86100), optical power meters, TDECQ testers
Experience with OIF-CEI, IEEE 802.3dj electrical and optical compliance specs
In-depth expertise in debugging and troubleshooting hardware; experience in the product development lifecycle.
Understanding of fiber plant requirements: MPO/MTP connector, fiber cleanliness, insertion loss, PMD, and bend radius for high-density AI cluster cabling
Experience with link budget modeling tools (MATLAB, Python-based photonic simulation, GNPY)
Ability to collaborate with switch ASIC teams (SerDes architects), PCB/signal integrity engineers, thermal/mechanical engineers, and NOS/software teams
Strong technical documentation and vendor communication skills
Bonus Points
Background in AI accelerator or GPU system validationFamiliarity with JEDEC or PCIe compliance testing methodologiesExperience with statistical process control (SPC) or large-scale data analysis for silicon characterization
Compensation
The US base salary for this full-time position is determined based on a variety of factors including role, experience, location, job related skills, and relevant education and training. Career length is only a guideline for compensation.
Early Career - $120,000 - $250,000 + equity
Mid Career - $175,000 - $362,500 + equity
Senior Career - $250,000 - $475,000 + equity
What We Offer
A Stake in our success A flexible cash equity compensation mix that fits your needs
Heath & Wellness Company subsidized Health, Dental, Vision, and Life insurance; Pre-tax Health Savings Accounts with generous company contribution (even if you don’t)
Time To Recharge 4 weeks paid time off (accrued), 12 company holidays, and 3 weeks remote/flexible work per year
Support to Parents Up to 12 weeks of paid parental leave, regardless of your path to parenthood
Learning & Development $1,500 yearly towards your professional development e.g. conferences, courses, and other learning opportunities
Team Connection Team Lunches, quarterly off-sites, and regular town halls
Financial Wellbeing 401K and/or Roth IRA, with 5% company contribution, even if you don’t!
Flexible Spending Accounts Pre-tax spend accounts for medical, dental/vision, dependent care, parking, and transit expenses
Commute On Us For those commuting up to 1 hour, put your rideshare cost on our company card and reclaim the drive-time to get work done!
MatX E[x]tras $50 per month to use on the perks you care about most
Remote Perks We work remotely Monday & Friday, supported by home-tech setup, and remote wifi expense reimbursement
As part of our dedication to the diversity of our team and our focus on creating an inviting and inclusive work experience, MatX is committed to a policy of Equal Employment Opportunity and will not discriminate against an applicant or employee on the basis of race, color, religion, creed, national origin or ancestry, sex, gender, gender identity, gender expression, sexual orientation, age, physical or mental disability, medical condition, marital/domestic partner status, military and veteran status, genetic information or any other legally recognized protected basis under federal, state or local laws, regulations or ordinances.
All candidates must be authorized to work in the United States and work from our offices in Mountain View Tuesdays-Thursdays.
This position requires access to information that is subject to U.S. export controls. This offer of employment is contingent upon the applicants capacity to perform job functions in compliance with U.S. export control laws without obtaining a license from U.S. export control authorities.
MatX does not accept unsolicited resumes from individual recruiters or third-party recruiting agencies in response to job postings. No fee will be paid to third parties who submit unsolicited candidates directly to our hiring managers or People team and any resumes submitted are deemed to be the property of MatX.
What We Offer
A Stake in our success A flexible cash equity compensation mix that fits your needs
Health & Wellness Company subsidized Health, Dental, Vision, and Life insurance; Pre-tax Health Savings Accounts with generous company contribution (even if you don’t)
Time To Recharge 4 weeks paid time off (accrued), 12 company holidays, and 3 weeks remote/flexible work per year
Support to Parents Up to 12 weeks of paid parental leave, regardless of your path to parenthood
Learning & Development $1,500 yearly towards your professional development e.g. conferences, courses, and other learning opportunities
Team Connection Team Lunches, quarterly off-sites, and regular town halls
Financial Wellbeing 401K and/or Roth IRA, with 5% company contribution, even if you don’t!
Flexible Spending Accounts Pre-tax spend accounts for medical, dental/vision, dependent care, parking, and transit expenses
Commute On Us For those commuting up to 1 hour, put your rideshare cost on our company card and reclaim the drive-time to get work done!
MatX E[x]tras $50 per month to use on the perks you care about most
Remote Perks We work remotely Monday & Friday, supported by home-tech setup, and remote wifi expense reimbursement
As part of our dedication to the diversity of our team and our focus on creating an inviting and inclusive work experience, MatX is committed to a policy of Equal Employment Opportunity and will not discriminate against an applicant or employee on the basis of race, color, religion, creed, national origin or ancestry, sex, gender, gender identity, gender expression, sexual orientation, age, physical or mental disability, medical condition, marital/domestic partner status, military and veteran status, genetic information or any other legally recognized protected basis under federal, state or local laws, regulations or ordinances.
All candidates must be authorized to work in the United States and work from our offices in Mountain View Tuesdays-Thursdays.
This position requires access to information that is subject to U.S. export controls. This offer of employment is contingent upon the applicants capacity to perform job functions in compliance with U.S. export control laws without obtaining a license from U.S. export control authorities.
MatX does not accept unsolicited resumes from individual recruiters or third-party recruiting agencies in response to job postings. No fee will be paid to third parties who submit unsolicited candidates directly to our hiring managers or People team and any resumes submitted are deemed to be the property of MatX.