Principal Engineer

About the company Inlighten Technologies is a Silicon Valley startup developing next generation microLED technologies for high-performance computing and augmented reality (AR) glasses. Our mission is to push the limits of microLED performance and manufacturing, enabling optical interconnect solutions that break the memory-wall bottleneck in AI data centers. Join us to help create the optical communication engines that will power the future of scalable AI infrastructure. About the Role As a Leading Developer for High-Speed microLED Arrays, you will bridge the gap between advanced III-V optoelectronic chip fabrication and high-bandwidth optical interconnect applications. You will lead the design, optimization, and high-frequency characterization of microLED arrays targeted at multi-terabit optical interconnects. This is a high-impact role requiring a rare combination of hands‑on expertise in III‑V semiconductor physics (InGaN/GaAs) and a deep understanding of high‑speed optical transmitter architectures (PAM‑4/NRZ, small‑signal bandwidth, and impedance matching). You will drive the technology from initial device physics concept to high‑volume integration with CMOS backplanes. Key Responsibilities Lead High-Speed microLED Design: Drive the architecture, layout, and process integration of high‑density microLED arrays optimized for GHz-range modulation bandwidths. Optimize Epitaxy & Device Physics: Partner with MOCVD and process engineering to engineer epitaxial stacks and chip designs for highest current density and to minimize carrier lifetime and RC parasitics. Drive High-Frequency Characterization: Collaborate with the metrology team to establish electro‑optical test capabilities for RF testing, including S‑parameter measurements, eye‑diagram analysis, and Bit Error Rate (BER) characterization. Execute CMOS/Driver Co-Design: Collaborate with high‑speed analog/mixed‑signal IC designers to co‑optimize the electrical interface, ensuring impedance matching between the microLED array and CMOS driver backplanes. Build Data-Driven Performance Modeling: Utilize carrier transport and optical simulation tools to model high-injection dynamics, self‑heating, and modulation response under high‑speed operation. Manage IP and Technology Roadmap: Identify and secure intellectual property for high‑speed microLED structures, driving the company's technical edge in the AI hardware ecosystem. Required Qualifications Education & Experience: Ph.D. or Master’s degree in Physics, Electrical Engineering, Materials Science, or a related field with a focus on optoelectronics Deep expertise in III‑V semiconductor optoelectronics (InGaN, InGaAsP, or InGaAlP) spanning epitaxy fundamentals, chip design, and front‑end processing Proven track record in high‑speed datacom/telecom technology, specifically with direct‑modulation transmitters (e.g., VCSELs, high‑speed LEDs, or EMLs) Experience with advanced packaging and integration techniques Technical Skills: Hands‑on mastery of high‑frequency RF testing techniques and equipment (Network Analyzers, BERTs, High‑Speed Oscilloscopes) Solid understanding of optical link budgets, chromatic dispersion, and optical coupling mechanics into multi‑mode or single‑mode fibers/waveguides Working knowledge of data analysis and statistical processing tools (Python, MATLAB, JMP). Experience with semiconductor device simulation tools (e.g., Silvaco, Sentaurus, COMSOL) tuned for dynamic AC/RF analysis is a plus Soft Skills: Strong communication, leadership, and stakeholder management skills, with the ability to influence across functions, align global teams, and operate effectively in an international environment. Comfortable working in a start‑up environment What we offer Base salary range: $220k-$290k, based on experience Comprehensive health, dental, and vision insurance 401(k) retirement plan Paid holidays and vacation A varied role with real responsibility and visibility. Direct collaboration, quick decisions, and the joy of building something great together. A dynamic, informal startup culture. Equal Employment Opportunity Inlighten Technologies is an equal opportunity employer that is committed to inclusion and diversity. We promote equal opportunity for all applicants without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, disability, veteran status, or any other legally protected characteristics. #J-18808-Ljbffr