Refolk
Open nowEngineeringProduct

Director System Application Engineering

Lumilens · San Jose, California

Location
San Jose, California, United States
Employment
Full time
Level
Director
Posted
9 April

About this role

Position Overview
We are seeking a Director / Senior Director, System Applications Engineering to lead customer-facing system engineering for next-generation AI networking platforms and high-speed optical interconnects. This leader will define and drive the technical engagement model for deploying 800G and 1.6T optical transceivers across 51.2T-class and next-generation switch architectures.

This role sits at the intersection of customer success, system architecture, and product strategy, owning the end-to-end applications engineering function. The ideal candidate combines deep technical expertise in optical systems, DSPs, and AI networking with a proven ability to build teams, influence product direction, and drive successful customer deployments at scale.

Key Responsibilities

  • Lead System Applications Engineering Function
    Build, scale, and lead a high-performing team of system and applications engineers supporting global customer deployments

  • Own Customer Technical Engagement Strategy
    Serve as the executive-level technical interface for key customers, shaping system-level solutions and long-term partnerships

  • Drive End-to-End System Integration Excellence
    Oversee bring-up, validation, and optimization of optical links across AI networking platforms, ensuring performance, reliability, and interoperability

  • Resolve Complex System-Level Challenges
    Lead cross-functional efforts to debug and resolve issues spanning optical modules, DSPs, switches, and system architectures

  • Influence Product & Roadmap Decisions
    Translate customer insights and field learnings into actionable input for product, engineering, and go-to-market strategies

  • Establish Scalable Processes & Best Practices
    Define standards for customer support, escalation management, system validation, and deployment methodologies

  • Lead Customer Demos & Strategic Engagements
    Oversee high-impact evaluations, proof-of-concepts, and design wins with leading AI infrastructure customers

  • Stay Ahead of Industry Trends
    Guide internal strategy by maintaining deep expertise in AI networking, optical interconnects, and next-generation switch architectures

Required Qualifications

  • Bachelor’s or advanced degree in Electrical Engineering or related field

  • 10+ years of experience in optical systems, networking, or high-speed interconnects, with progressive leadership responsibility

  • Deep expertise in optical transceivers, DSP architectures, and high-speed link performance and debugging

  • Strong understanding of AI networking systems, including 51.2T and next-generation switch architectures

  • Proven track record of leading customer-facing engineering teams and delivering complex system deployments

  • Experience with 800G optical modules required; 1.6T and next-generation systems strongly preferred

  • Background at a leading optical transceiver, networking systems, or hyperscale infrastructure company highly preferred

  • Exceptional communication and executive presence, with the ability to influence both technical and business stakeholders

  • Demonstrated ability to operate cross-functionally and drive alignment across engineering, product, and commercial teams

Benefits

  • Competitive salary and significant equity in a high-growth, well-funded startup

  • Comprehensive health, dental, and vision coverage

  • Flexible time off policy

  • Opportunity to shape foundational technology powering next-generation AI infrastructure

  • Highly experienced, collaborative, and mission-driven team

  • Fast-paced, innovative environment with significant leadership impact and career growth

Equal Opportunity Statement

All qualified applicants will receive consideration for employment without regard to race, color, religion, religious creed, sex, national origin, ancestry, age, physical or mental disability, medical condition, genetic information, military and veteran status, marital status, pregnancy, gender, gender expression, gender identity, sexual orientation, or any other characteristic protected by applicable law.

As published by Lumilens. Applications are handled on their site.

Skills this posting mentions

Artificial IntelligenceSystem ArchitectureProduct Strategy

About Lumilens

Lumilens addresses the red hot market for AI data center infrastructure by designing, manufacturing and selling photonic interconnect solutions. We design and use custom robotics + AI in our factories to more efficiently build our products. Lumilens is backed by top-tier venture capital investors including Mayfield and Spark Capital.

All 161 openings at Lumilens

One click, then it is written

Apply to Lumilens with a resume written for this role.

Queue Director System Application Engineering and I read the posting, rewrite your resume against it, draft the cover letter, and score the fit. Then you press send, or press one button and I fill in Lumilens’s form for you.

  1. 01Drop your resume

    A PDF or a LinkedIn URL. About a minute, once.

  2. 02I rank the openings

    Every weekday morning, the live catalog scored against your history. Up to 20 worth your time, not two hundred links.

  3. 03Each one is written up

    Resume rewritten for the posting, a cover letter, a fit score. Press send, or let me fill in the form.

  • 25 sent a week, free
  • No card
  • Nothing sent until you say so

More roles at Lumilens

See all

Similar roles elsewhere

See more

Put this to work

Paste your career in once. Every application after that is written for you.

Drop a resume or a LinkedIn URL. I rank the live openings against it, rewrite the resume and write a cover letter for the best of them, and fill in the employer's form when you press the button. You read, you decide what goes out.

  1. 01Drop your resume

    A PDF or a LinkedIn URL. About a minute, once.

  2. 02I rank the openings

    Every weekday morning, the live catalog scored against your history. Up to 20 worth your time, not two hundred links.

  3. 03Each one is written up

    Resume rewritten for the posting, a cover letter, a fit score. Press send, or let me fill in the form.

  • New matches ranked and written before you are up.
  • Every bullet stays inside what your history supports. Nothing invented.
  • Queued, submitted, interviewing, offer: one screen, not a spreadsheet.

500 free credits on sign-up. No card. Nothing is sent until you say so.

Listed from the job board Lumilens publishes. Refolk is not the employer and does not handle their hiring. Applications go to Lumilens directly.

Hiring at Lumilens? Post this role to the Refolk talent pool for $299, once. No commission, refunded if I find nobody. Post a role for $299