Location: Irvine, Orange County, CA
Position type: Full-time (on-site)
Start date: Immediate

About the Company
Lumos Infinitas USA, Inc. is a silicon photonics company developing advanced photonic integrated circuits (PICs) for AI and data-center interconnect applications. Our core focus is the design and commercialization of high-speed optical transceivers and photonic switching engines. The company is developing solutions across multiple optical interconnect architectures, including LPO (Linear Pluggable Optics), NPO (Near-Packaged Optics), and CPO (Co-Packaged Optics). These platforms integrate high-speed modulators, photodetectors, multiplexers, lasers, and optical switching technologies to deliver low-power, high-bandwidth connectivity for next generation AI, communication, and computing systems.

Responsibilities
We are looking for an engineer that can take over the following responsibilities:

• Design and optimize passive silicon photonic building blocks, including waveguides, edge couplers, grating couplers, directional couplers, MMIs, MZIs, multiplexers, and filters.
• Perform electromagnetic and photonic simulations using industry-standard tools to validate device performance and support design trade-offs.
• Develop and maintain parameterized layout cells (PCells), automation scripts, and photonic design libraries to improve design productivity and reusability.
• Work closely with silicon photonics foundries to understand process technologies, PDKs, design rules, and fabrication constraints.
• Execute the complete PIC design flow, including schematic capture, simulation, layout generation, design verification, DRC, and tape-out preparation.
• Collaborate with packaging, test, and system engineers to ensure successful integration of photonic integrated circuits into optical transceiver and switching products.
• Analyze fabricated devices, correlate measurement results with simulations, and drive continuous design improvements.
• Contribute to the development and qualification of process design kits (PDKs) and reusable photonic IP blocks.
• Support laboratory testing, characterization, and performance evaluation of photonic integrated circuits.

Preferred / Bonus Responsibilities
The following responsibilities are optional and a plus to have:

• Design and optimization of active photonic devices, including high-speed traveling-wave modulators, carrier-depletion modulators, germanium photodetectors, and laser integration approaches.
• Experience with high-speed optical interconnect architectures, including LPO, NPO, and CPO systems.
• Perform RF and electro-optic co-design for high-speed photonic devices operating at 100G, 200G, and beyond per lane.
• Contribute to system-level modeling and performance analysis of optical transceivers and photonic switching engines.

Required Qualifications and Skills
A good candidate should have the following qualifications and skills:  

• M.S. or Ph.D. in Electrical Engineering, Photonics, Physics, Applied Physics, or a related field with a focus on integrated photonics.
• Hands-on experience in the design, simulation, and characterization of photonic integrated circuits (PICs).
• Strong understanding of integrated photonics fundamentals, including waveguide optics, passive photonic devices, optical coupling structures, and interferometric circuits.
• Experience with photonic simulation tools such as Lumerical FDTD, MODE, EME, INTERCONNECT, DEVICE, or equivalent commercial/open-source tools.
• Experience with photonic layout generation and scripting using platforms such as IPKISS, Nazca, GDSFactory, KLayout, or similar frameworks.
• Familiarity with silicon photonics foundry PDKs, design rules, and tape-out processes, and having a tape-out experience with at least one silicon photonics foundry and its PDK.
• Proficiency in Python scripting for design automation, data analysis, and test characterization.
• Strong analytical and problem-solving skills, with the ability to independently drive design projects from concept to fabrication.
• Excellent communication skills and ability to collaborate effectively within multidisciplinary engineering teams.

Compensation and Benefits
Lumos Infinitas offers a competitive compensation package that includes:

• Competitive base salary
• Performance-based bonus opportunities
• Medical, dental, and vision insurance
• 401(k) retirement savings plan
• Paid time off (PTO) and company holidays
• Flexible work arrangements
• Professional development and training support
• Stock options could be offered to exceptional candidates

Apply
​To apply, please submit your resume to “info@lumosus.com” and include "Candidate – (Senior) Silicon Photonic Design Engineer" in the email subject line.  

Location: Irvine, Orange County, CA
Position type: Full-time (on-site)
Start date: Immediate

About the Company
Lumos Infinitas USA, Inc. is a silicon photonics company developing advanced photonic integrated circuits (PICs) for AI and data-center interconnect applications. Our core focus is the design and commercialization of high-speed optical transceivers and photonic switching engines. The company is developing solutions across multiple optical interconnect architectures, including LPO (Linear Pluggable Optics), NPO (Near-Packaged Optics), and CPO (Co-Packaged Optics). These platforms integrate high-speed modulators, photodetectors, multiplexers, lasers, and optical switching technologies to deliver low-power, high-bandwidth connectivity for next generation AI, communication, and computing systems.

Responsibilities
We are looking for a highly skilled (Senior) Active Silicon Photonics Design Engineer to join our dynamic team and contribute to the design and development of next-generation high-speed optical transmitters and receivers. A good candidate should be able to take over the following responsibilities:

• Design and optimize high-speed silicon photonic transmitters and receivers, with a focus on traveling-wave modulators (TWM), ring modulators, and high-speed PDs.
• Lead the RF and electro-optic design of active photonic devices targeting 200G/lane and beyond.
• Model, simulate, and optimize active photonic components using industry-standard tools such as HFSS, Lumerical, or other software.
• Design and analyze RF structures including transmission lines, impedance-matching networks, electrode structures, and high-speed interconnects for photonic integrated circuits (PICs).
• Develop and maintain automated design flows, PCells, and layout generation scripts using Python-based tools.
• Work closely with foundry partners to ensure designs meet process requirements and are compatible with advanced silicon photonics manufacturing platforms.
• Collaborate with electrical, packaging, system, and test engineers to optimize overall device and system performance.
• Plan and support tape-outs, design verification, and post-fabrication characterization activities.
• Analyze measurement data from fabricated devices and drive iterative design improvements based on test results.
• Contribute to the development of next-generation optical transceivers and photonic switching products for AI and data-center applications.

Preferred Responsibilities
The following responsibilities are preferred to have:

• Experience with silicon photonics foundries and PDKs.
• Experience designing high-speed germanium photodetectors and receiver PICs.
• Familiarity with advanced optical transceiver architectures, including LPO, NPO, and CPO.
• Experience with high-speed packaging, co-design, and optical assembly technologies.
• Understanding of optical communication standards and system-level link budgets.
• Experience with Thin-Film Lithium Niobate (TFLN) modulators and hybrid photonic integration (optional and plus).
• Prior experience taking products from concept through fabrication, characterization, and volume manufacturing.

Required Qualifications and Skills
A good candidate should have the following qualifications and skills:

• Ph.D. in Electrical Engineering, Photonics, Applied Physics, or a related field; or M.S. degree with at least 3 years of industry experience in silicon photonics, high-speed optical communications, or RF design.
• Demonstrated experience designing and optimizing high-speed silicon photonic modulators, including traveling-wave modulators and/or ring modulators.
• Strong background in RF and microwave engineering, including transmission-line theory, impedance matching, signal integrity, and S-parameter analysis.
• Expertise with electromagnetic and multiphysics simulation tools such as HFSS, Lumerical (FDTD, MODE, CHARGE, INTERCONNECT), COMSOL, or CST.
• Experience with PIC layout design and automation using Python-based tools such as KLayout, IPKISS, Nazca, GDSFactory, or equivalent frameworks.
• Familiarity with silicon photonics foundry PDKs, design rules, and tape-out processes.
• Knowledge of CMOS, silicon photonics, or III-V semiconductor fabrication technologies.
• Experience with high-speed electro-optic characterization techniques, including VNA measurements, eye-diagram analysis, BER testing, and optical link evaluation (optional and plus).
• Strong analytical and problem-solving skills, with the ability to independently drive design projects from concept to fabrication.
• Excellent communication skills and ability to collaborate effectively within multidisciplinary engineering teams.

Compensation and Benefits
Lumos Infinitas offers a competitive compensation package that includes:

• Competitive base salary
• Performance-based bonus opportunities
• Medical, dental, and vision insurance
• 401(k) retirement savings plan
• Paid time off (PTO) and company holidays
• Flexible work arrangements
• Professional development and training support
• Stock options could be offered to exceptional candidates

Apply
To apply, please submit your resume to “info@lumosus.com” and include "Candidate – (Senior) Active Silicon Photonic Design Engineer" in the email subject line.  

Location: Irvine, Orange County, CA
Position type: Full-time (on-site, Hybrid, Remote)
Start date: Immediate 

Lumos Infinitas is seeking an experienced Director of Marketing & Market Development to lead the company's market-facing strategy and commercial positioning in the United States. This is a hands-on leadership role for an accomplished marketing professional who can translate complex deep-tech innovations into compelling market messages and help establish Lumos Infinitas as a recognized leader in AI networking and optical interconnect technologies.
 

The ideal candidate has a strong background in B2B product marketing, strategic marketing, technical marketing, or market development within one or more of the following industries:

• Silicon Photonics
• Semiconductors
• Optical Communications
• Networking
• AI Infrastructure
• Data Center Technologies

This role will work closely with executive leadership, engineering, product development, and business development teams to define market positioning, strengthen industry visibility, support customer engagement, and accelerate revenue growth.
 

Key Responsibilities

• Develop and execute the company's U.S. marketing and market development strategy to drive growth, brand awareness, and market penetration.
• Define product positioning, messaging, and value propositions for Lumos Infinitas solutions serving AI, machine learning, and next-generation data center applications.
• Translate complex technical capabilities into clear, compelling content for customers, partners, investors, and industry stakeholders.
• Conduct market research and competitive analysis across optical interconnects, silicon photonics, AI networking, co-packaged optics (CPO), linear pluggable optics (LPO), and related markets.
• Identify high-value customer segments, emerging applications, strategic partnerships, and new market opportunities.
• Support business development and sales through customer presentations, product collateral, white papers, technical briefs, case studies, and other customer-facing materials.
• Develop and execute conference, trade show, webinar, and thought leadership strategies to strengthen the company's industry presence.
• Collaborate with external agencies and partners on public relations, digital marketing, content development, and brand-building initiatives.
• Oversee the company's external communications, including website content, press releases, social media, and industry communications.
• Build and maintain relationships with customers, ecosystem partners, analysts, industry organizations, and trade media.
• Define, monitor, and report marketing KPIs related to brand awareness, customer engagement, lead generation, pipeline development, and market impact.
• Work closely with engineering and leadership teams to ensure marketing strategies accurately reflect product capabilities and evolving customer needs.

Qualifications

• Bachelor's degree in Marketing, Business, Electrical Engineering, Physics, or a related technical field. An MBA or advanced technical degree is a plus.
• 7+ years of experience in B2B marketing, product marketing, technical marketing, strategic marketing, or market development.
• Experience in one or more of the following industries:

             - Silicon Photonics
             - Semiconductors
             - Optical Communications
             - Networking
             - Telecom/Datacom
             - AI Infrastructure
             - Data Center Technologies

• Demonstrated success marketing highly technical products in business-to-business markets.
• Strong understanding of go-to-market strategy, product positioning, messaging, and customer engagement.
• Excellent written, verbal, and presentation skills, with the ability to communicate effectively with both technical and executive audiences.
• Experience working collaboratively across engineering, product management, business development, and executive leadership.
• Self-motivated, entrepreneurial, and comfortable working in a fast-paced startup environment with evolving priorities.
• Willingness to travel for customer meetings, industry conferences, partner engagements, and trade events.

Preferred Qualifications

• Experience marketing products related to AI networking, optical transceivers, silicon photonics, co-packaged optics (CPO), linear pluggable optics (LPO), or high-speed data center infrastructure.
• Existing relationships within the AI, cloud, networking, or optical communications ecosystem.
• Experience supporting fundraising, investor communications, or strategic partnerships is a plus.

What Success Looks Like
 In this role, you will play a key part in shaping how Lumos Infinitas is perceived within the industry. Success includes:

• Establishing a clear and differentiated market position for the company's technology.
• Increasing Lumos Infinitas' visibility across the AI networking and optical interconnect ecosystem.
• Producing high-quality marketing, technical, and investor-facing content.
• Enabling business development through compelling messaging and stronger customer engagement.
• Identifying high-impact U.S. market opportunities and strategic partnerships.
• Building a strong brand recognized for innovation, technical excellence, and commercial leadership.

Compensation & Benefits
Lumos Infinitas offers a competitive compensation package that includes:

• Competitive base salary
• Performance-based incentives
• Medical, dental, and vision insurance
• 401(k) retirement savings plan
• Paid time off (PTO) and company holidays
• Flexible work arrangements
• Equity participation​ 

Compensation will be commensurate with qualifications, experience, and demonstrated expertise.
 

Apply
To apply, please submit your resume to “ info@lumosus.com ” and include "Candidate – (Senior) Director of Marketing and Market Development" in the email subject line. 

Location: Irvine, Orange County, CA
Position Type: Full-Time (Onsite, Remote)
Start Date: Immediate
 

About the Company
Lumos Infinitas USA, Inc. is a silicon photonics company developing advanced photonic integrated circuits (PICs) for AI and data-center interconnect applications. Our core focus is the design and commercialization of high-speed optical transceivers and photonic switching engines. The company is developing solutions across multiple optical interconnect architectures, including LPO (Linear Pluggable Optics), NPO (Near-Packaged Optics), and CPO (Co-Packaged Optics). These platforms integrate high-speed modulators, photodetectors, multiplexers, lasers, and optical switching technologies to deliver low-power, high-bandwidth connectivity for next generation AI, communication, and computing systems.

​As a growing startup, we are seeking an organized, proactive, and detail-oriented Office Manager to support our daily operations and help build an efficient and collaborative workplace.

Responsibilities
Office Administration

• Manage day-to-day office operations to ensure an organized and productive work environment.
• Maintain office supplies, equipment, and vendor relationships.
• Coordinate facility maintenance and office services.
• Organize company meetings, events, and internal communications.

Finance & Bookkeeping

• Record and organize company expenses and maintain accurate financial records.
• Process invoices, reimbursements, and purchase orders.
• Assist with bookkeeping and monthly financial reporting.
• Work closely with the company's accountant to provide supporting financial documentation.
• Maintain organized records for audits and regulatory compliance.

Purchasing & Logistics

• Purchase office supplies, laboratory equipment, and engineering materials.
• Coordinate shipments, deliveries, and inventory tracking.
• Obtain quotations from vendors and manage supplier communications.
• Support procurement activities while ensuring cost-effective purchasing.

Travel & Administrative Support

• Arrange domestic and international travel, including flights, hotels, transportation, and meeting schedules.
• Prepare travel itineraries and assist with travel expense reporting.
• Schedule meetings and coordinate executive calendars as needed.

Human Resources Support

• Assist with employee onboarding and offboarding activities.
• Prepare and maintain employee records, employment agreements, and HR documentation.
• Coordinate employee benefits enrollment and related administrative processes.
• Support recruiting activities, including scheduling interviews and communicating with candidates.
• Help ensure compliance with company policies and applicable employment regulations.

Required Qualifications and Skills

• Bachelor's degree in Business Administration, Accounting, Human Resources, or a related field, or equivalent professional experience.
• 2+ years of experience in office administration, office management, bookkeeping, or administrative operations.
• Experience with bookkeeping and expense management.
• Proficiency with Microsoft Office (Word, Excel, Outlook) and Google Workspace.
• Experience with accounting or bookkeeping software such as QuickBooks, Xero, or similar platforms.
• Excellent organizational, time-management, and multitasking skills.
• Strong written and verbal communication skills.
• High level of professionalism, discretion, and attention to detail.
• Ability to work independently and thrive in a fast-paced startup environment.

Preferred Qualifications

• Experience supporting engineering or technology companies.
• Familiarity with payroll administration and employee benefits.
• Experience coordinating domestic and international business travel.
• Knowledge of California employment practices and HR administration.
• Experience with purchasing, vendor management, and procurement.
• Experience with startup operations is a plus.

Compensation and Benefits

• Competitive salary based on experience and qualifications.
• Medical, dental, and vision insurance.
• 401(k) retirement plan.
• Paid vacation, company holidays, and sick leave.
• Flexible work environment.
• Professional development opportunities.
• Opportunity to grow with a fast-growing technology startup and contribute to building its operational foundation.

Apply
Interested candidates are invited to submit their resume to “info@lumosus.com”. Please include "Candidate – Office Manager" in the subject line of your email. 

Location: Irvine, Orange County, CA
Position Type: Full-time (On-site)
Start Date: Flexible

About the Company
Lumos Infinitas USA, Inc. is a silicon photonics company developing advanced photonic integrated circuits (PICs) for AI and data-center interconnect applications. Our core focus is the design and commercialization of high-speed optical transceivers and photonic switching engines. The company is developing solutions across multiple optical interconnect architectures, including LPO (Linear Pluggable Optics), NPO (Near-Packaged Optics), and CPO (Co-Packaged Optics). These platforms integrate high-speed modulators, photodetectors, multiplexers, lasers, and optical switching technologies to deliver low-power, high-bandwidth connectivity for next generation AI, communication, and computing systems.

​As an intern, you will work alongside experienced photonics engineers on the design, simulation, and characterization of state-of-the-art photonic integrated circuits (PICs).

Responsibilities
We are looking for candidates that can take some of the following responsibilities:

• Perform optical simulations of passive and/or active silicon photonic devices using commercial simulation software.
• Assist in the design and optimization of photonic building blocks, including waveguides, edge couplers, grating couplers, MMIs, directional couplers, MZIs, and ring resonators.
• Support the characterization and testing of fabricated photonic integrated circuits.
• Analyze optical measurement data and compare experimental results with simulation predictions.
• Develop Python scripts for data analysis, simulation automation, and measurement processing.
• Assist with PIC layout generation and design automation using modern layout tools.
• Document simulation results, measurement procedures, and design recommendations.
• Collaborate with device, packaging, and test engineers on ongoing product development.

Required Qualifications

• Currently pursuing a B.S., M.S., or Ph.D. in Electrical Engineering, Photonics, Physics, Applied Physics, or a related field.
• Fundamental understanding of integrated photonics, waveguide optics, and optical communications.
• Familiarity with at least one photonic simulation tool, such as Lumerical (FDTD, MODE, EME, INTERCONNECT), tidy3D, COMSOL, or equivalent.
• Basic programming experience in Python.
• Strong analytical, problem-solving, and communication skills.
• Ability to work both independently and as part of a multidisciplinary engineering team.

Preferred Qualifications

• Experience with silicon photonics through coursework, research, or prior internships.
• Familiarity with PIC layout tools such as KLayout, GDSFactory, Nazca, or IPKISS.
• Experience with laboratory optical testing, including lasers, polarization controllers, optical spectrum analyzers, power meters, VNAs, or high-speed measurement equipment.
• Knowledge of optical communication systems and integrated photonics.
• Experience with Linux-based development environments.

What You Will Gain

• Hands-on experience with commercial silicon photonics design flows.
• Exposure to industry-standard simulation, layout, fabrication, and characterization tools.
• Mentorship from experienced photonics engineers.
• Opportunity to contribute to cutting-edge optical transceiver and photonic switching technologies for AI infrastructure.
• Potential opportunity for future full-time employment based on performance.

Compensation and Benefits

• Competitive hourly compensation.
• Flexible work schedule compatible with academic commitments.
• Mentorship and technical training.
• Opportunity to work with state-of-the-art silicon photonics technologies in a fast-growing startup environment.

Apply
Interested candidates are invited to submit their resume to “info@lumosus.com”. Please include "Candidate – Silicon Photonics Intern" in the subject line of your email.