Electrical Engineer III

SemiconBio is bringing up a molecular electronics platform designed to deliver disruptive performance in diagnostic and binding areas. The platform deploys multi-molecule sensor technology on a chip to deliver dramatic reduction in the cost of assays with unprecedented speed, accuracy, and simplicity. SemiconBio’s leadership has unmatched experience in developing high-impact, high-tech devices for the Life Sciences, and bringing them to market globally. Our goals are big, our timelines are short, and we are building the team that will make it happen. The Electrical Engineer III will be a hands-on technical contributor focused on device layout, digital circuit design, electrical test systems, and electrochemical measurement electronics, including potentiostats and other precision sensing/measuring units. This role requires someone comfortable moving quickly from concept to schematic, device layout, fabrication, bring-up, debug, and prototype iteration. The ideal candidate is a practical self-starter who can design, build, test, troubleshoot, document, and occasionally assemble or solder prototype boards as needed. Specific Responsibilities Include Design, layout, fabricate, bring up, and debug custom device assemblies for R&D instruments, test fixtures, prototype systems, and measurement platforms. Develop digital circuit designs, including microcontroller/embedded interfaces, communication buses, control electronics, sensor interfaces, and peripheral circuitry. Design and support electrochemical measurement electronics, including potentiostats, current/voltage measurement circuits, signal conditioning, low-noise analog front ends, and other precision measuring units. Select components and create schematics, device layouts, BOMs, fabrication packages, assembly drawings, and test documentation. Work with external device fabrication and assembly vendors to support prototype builds, design reviews, feedback, and rapid iteration cycles. Bring up and troubleshoot new boards using electrical test equipment. Perform root-cause analysis for electrical failures, noise issues, board-level defects, communication problems, and measurement inconsistencies. Support development of electrical test fixtures, benchtop test setups, and automated or semi-automated test procedures. Perform hands-on prototype assembly, soldering, rework wiring and lab troubleshooting. Collaborate closely with software, firmware, mechanical, assay, systems, and external engineering partners to ensure electrical designs meet system-level requirements. Maintain clear documentation, revision control, and design history for ease of lookback and future product development. Strong experience with PCB schematic capture and layout using one or more EDA tools such as Altium, Cadence, KiCad, OrCAD, or similar. Demonstrated experience designing, fabricating, bringing up, and debugging prototype PCBs. Experience with digital circuit design, including embedded interfaces, microcontrollers, communication protocols, timing, logic-level translation, and peripheral integration. Experience using electrical test equipment, including oscilloscope, multimeter, logic analyzer, power supply, and function generator. Demonstrated ability to troubleshoot board-level electrical issues and perform structured root-cause analysis. Hands-on experience working with PCB fabrication and assembly vendors. Ability and willingness to perform prototype assembly, soldering, rework, and lab-based troubleshooting. Excellent written, documentation, and oral communication skills. Strong interpersonal, organizational, and analytical skills, including the ability to handle a variety of tasks in a fast-paced environment. U.S. Citizens, Green Card holders, and those authorized to work in the U.S. for any employer will be considered. The position is in the Sorrento Valley area of San Diego. Additional Preferred Qualification Experience designing potentiostats, electrochemical measurement systems, impedance measurement circuits, or other precision low-current/low-noise measurement electronics. Familiarity with cyclic voltammetry, square-wave voltammetry, impedance spectroscopy, amperometry, or related electrochemical measurement methods. Experience with analog front-end design, transimpedance amplifiers, precision ADCs/DACs, op amps, filters, shielding, grounding, and noise mitigation. Experience with mixed-signal PCB layout, high-impedance nodes, low-current measurements, isolation, grounding strategy, and EMI/EMC considerations. Experience with mixed-signal integrated circuit layout for implementation with 180nm/90nm PDK Familiarity with embedded firmware bring-up and working closely with firmware/software engineers during board validation. Experience developing test fixtures, benchtop instrumentation, or production-intent electrical test setups. Experience in diagnostics, life sciences instrumentation, medical devices, biosensors, or regulated product development environments. Familiarity with design controls, requirements traceability, risk management, verification testing, and structured engineering documentation. BS in Electrical Engineering, Electronics Engineering, Computer Engineering, or related engineering field with 6+ years of relevant industry experience -OR- MS in Electrical Engineering, Electronics Engineering, Computer Engineering, or related engineering field with 4+ years of relevant industry experience 401(k), Medical insurance, Vision insurance Salary Range of $135,000–$165,000, depending on experience. "Applicants must be currently authorized to work in the United States for any employer. At this time, the company is unable to sponsor or assume sponsorship of an employment visa or other employer-sponsored work authorization. The company is an equal opportunity employer and considers all qualified applicants without regard to race, color, religion, sex, national origin, age, disability, veteran status, or any other protected status under applicable law." #J-18808-Ljbffr SemiconBio Inc.