Sr. Principal Analog & Mixed Signal Design Engineers

Lumilens • San Jose, CA

8d

About The Position

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. We’re a well-funded startup backed by Mayfield and led by veterans who’ve built and scaled some of the most transformative technologies in the industry. This isn’t incremental innovation's a ground-floor opportunity to rethink the optical layer from the silicon up. You’ll work alongside a team of world-class engineers solving some of the hardest challenges in optics, systems, and scale. Every line of code, every design decision, every breakthrough you help deliver will shape the infrastructure of tomorrow. If you're looking for mission, momentum, and the chance to make an outsized impact—jump on the rocket ship. We’re just getting started. Position Overview We are seeking an experienced Analog / Mixed-Signal IC Design Engineer to design and deliver high-performance Driver and TIA circuits in BiCMOS and advanced semiconductor nodes. This role involves end-to-end ownership of analog building blocks, from architectural definition through silicon validation, in a fast-moving and technically rigorous environment. You will collaborate closely with digital, layout, and validation teams to deliver scalable, manufacturable analog IP.

Requirements

• MS or PhD in Electrical Engineering or related field.
• 7+ years of hands-on analog or mixed-signal IC design experience.
• Strong fundamentals in:
• Feedback and stability analysis
• Noise and jitter modeling
• High-speed analog circuit design
• Power integrity and substrate isolation
• Experience taking Driver, TIA, or related analog blocks through tape-out and lab validation.
• Proficiency with industry-standard analog design and simulation tools.

Nice To Haves

• BiCMOS (SiGe) and/or advanced CMOS nodes.
• High-speed data-path or I/O-adjacent analog circuits.
• Experience with process scaling and technology trade-offs.
• Exposure to silicon debug, failure analysis, and yield learning.

Responsibilities

• Architect and design high-speed analog and mixed-signal circuits, including:
• Transmit drivers (linear and/or PAM-based)
• Transimpedance amplifiers (TIAs) and receiver front-ends
• Clocking and timing circuits (PLLs, DLLs, low-jitter references)
• Biasing networks, bandgaps, and on-chip power regulation
• Perform transistor-level design, simulation, and optimization across PVT corners.
• Analyze and optimize bandwidth, noise, linearity, jitter, stability, and power.
• Work closely with layout engineers on floorplanning, matching, isolation, and parasitic management.
• Define and support silicon bring-up, characterization, and debug, including correlation to simulations.
• Contribute to design methodology, IP reuse, and best practices across programs.

Benefits

• Competitive salary and significant equity compensation in a rapidly growing, well-funded startup.
• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Principal
• Number of Employees: 11-50 employees