Xanadu’s mission is to build quantum computers that are helpful and available to people everywhere. Few people in their life will be able to be a part of something like this, where if we are successful, the technologies we develop will solve some of the world’s most challenging problems, and literally change the world. In this role, you will work within the Fabrication Process Engineering team to deliver Xanadu’s photonic quantum computing hardware.

With your deep technical expertise and experience developing waveguide‑integrated photodiodes and co‑integration techniques, you will be responsible for developing and optimizing fabrication and integration processes used to build critical components of Xanadu’s quantum computing hardware. Design and execute process improvement experiments for waveguide‑integrated photodiodes, including defining process splits, gathering and analyzing inline and offline metrology data, analyzing optical device data, etc. Work with external partners to execute process development and optimization experiments for photodiode co‑integration processes, including micro‑transfer printing (µTP), die‑to‑wafer bonding, wafer‑to‑wafer bonding, or similar.

Define and execute metrology and failure analysis plans to identify and mitigate failure modes and assess results of process optimization experiments. Regularly visit and coordinate with Xanadu’s industrial partners for photodiode fabrication and co‑integration. Collaborate with internal and external photonics process engineers, process integration engineers, design engineers, and test engineers, including at Xanadu’s industrial partners.

Challenge the state‑of‑the‑art in key performance metrics associated with waveguide‑integrated photodiodes. Stay abreast of new developments in the field of integrated photonics and rapidly implement new learnings and discoveries. Availability for travel required,



expected ≤ 20% travel time.

PhD in physics, materials science, electrical engineering or related field.

Experience with fabrication process development for integrated active optical components, including InGaAs‑ and/or Ge‑based waveguide‑integrated photodiodes, on‑chip lasers, etc. Familiarity with standard semiconductor and photonics metrology and failure analysis techniques, including at least two of: SEM, TEM, AFM, ellipsometry, XRR/XRD, SIMS, Raman spectroscopy, photoluminescence. Familiarity with functional epitaxial and crystalline materials for photonics, including III‑Vs, Ge, lithium niobate, etc.

Experience with data analysis and related software, such as Python, JMP, MATLAB, etc. 5 years of industrial and/or academic experience optimizing fabrication processes for active photonic elements such as photodiodes, lasers, etc. ~ Advanced Materials Expertise: MBE, MOCVD) and specialized fabrication techniques for compound semiconductors (GaAs, InP). ~ Experience with heterogeneous integration processes for integrated photonics and/or semiconductor applications, including some subset of µTP, die‑to‑wafer bonding, wafer‑to‑wafer bonding, or similar. ~ Demonstrated track record of achieving or exceeding state‑of‑the‑art performance specifications in heterogeneously integrated photonic components. ~ Experience with full product development cycle, from R&D; through volume ramping. ~ Experience in photonic quantum computing hardware development. ~ Experience coordinating with and managing external partners, including major semiconductor and photonics foundries. ~ The base salary range is 130,000 - 160,000 CAD. You will also be eligible for equity and benefits. We are committed to building an inclusive, safe, and equitable culture and fostering an environment where our employees feel included, valued, and heard.

We are committed to meeting the needs of all individuals and support a barrier‑free workplace.

📌 Process Integration Engineer - Photodiode Development (Toronto)
🏢 Xanadu
📍 Toronto