Principle Analog & Mixed-Signal Engineer

Location: Dublin, Ireland

We are seeking a highly accomplished Analog/Mixed-Signal Engineer to join our silicon design team. This is a pivotal and technically influential role within Equal1, responsible for the architecture, design, and delivery of advanced mixed-signal circuits that define the next generation of our Quantum System-on-Chip (QSoC) devices. The role offers a unique opportunity to engage in cutting-edge research and innovation in cryogenic analog design, quantum device interfacing, and single-electron detection, driving the circuits and systems that enable scalable quantum computing technologies.

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Main Duties and Responsibilities

Lead the detailed design, simulation, and implementation of cryogenic analog and mixed-signal circuits central to Equal1’s quantum processor technology.
Define, architect, and drive mixed-signal solutions, analyzing design trade-offs in performance, power, sensitivity, and scalability to guide system-level decisions.
Act as a technical authority and peer reviewer across multiple cryogenic IP blocks, ensuring design quality, reliability, and right-first-time execution.
Collaborate closely with system and quantum architecture, digital design, test, and quantum device physics teams to deliver cohesive, high-performance QSoC solutions.
Drive behavioral model development, verification strategies, and post-silicon validation, ensuring seamless integration, comprehensive functional coverage, and strong silicon correlation.
Utilize state-of-the-art EDA tools and methodologies to optimize the full design flow — from concept and schematic through custom layout, verification, and QSoC integration.
Lead post-silicon validation and bring-up of cryo circuits, including test plan definition, measurement analysis, and correlation of results between silicon and simulation.
Mentor and provide technical guidance to junior engineers, contractors, and external partners, fostering a culture of excellence, learning, and innovation.
Stay at the forefront of analog and quantum circuit research, contributing to Equal1’s patent portfolio and technical publications through innovative design and methodology development.

Desired Experience and Qualifications

Solid understanding of semiconductor device physics, particularly as it applies to cryogenic and quantum operating regimes.
Strong background in low-noise, low-power circuit design used in single-electron detection and qubit manipulation.
Experience in analog and mixed-signal circuit design and architecture using FDX22SOI and/or advanced FinFET technologies.
Fluency with industry-standard EDA tools for schematic, simulation, layout, and verification in deep-submicron CMOS.
Proven ability in custom layout-driven design and analog cell development, ensuring precision, matching, and robustness against parasitics, and process variation.
Experienced in validation and bench testing, including test definition, measurement-to-simulation correlation, and post-processing of results for performance analysis.
Preference for candidates with cryogenic, quantum, or single-electron detection backgrounds, reflecting the innovative R&D focus of this role.
Track record of publications and patents in relevant areas is highly desirable.
Advanced degree (PhD, MSc, or BEng) in Electronic Engineering, Physics, or related field.
Strong interpersonal and communication skills; proactive, adaptable, and collaborative.

About Equal1

Equal1 is a leading quantum-computing company delivering scalable, on-premises quantum solutions that augment today’s CPU/GPU workloads with silicon-based QPUs. Built for true plug-and-play data-centre integration in a rack-mounted form factor, to make exponential quantum-computing power available globally.