Quantum Photonics Engineer

Quantum Photonics Engineer About Qunett Qunett is developing the foundational hardware layer for quantum networking. Our mission is to build scalable, field-deployable quantum networks through solid-state quantum memory and networking technologies designed to operate beyond the laboratory and integrate directly with real-world infrastructure. At Qunett, physicists and engineers work hands-on with diamond-based quantum devices, photonics, cryogenic systems, and control electronics to translate fundamental quantum capabilities into practical networked hardware. This is a ground-floor opportunity to help shape how quantum systems communicate, scale, and drive the next generation of secure communication, distributed sensing, and quantum computing. As an early-stage company actively building out its quantum memory and photonics teams, Qunett seeks physicists and engineers who bring technical range, adaptability, and readiness to contribute across disciplines as the technology and team evolve. Work Location This is a full-time, onsite position based in Boston, MA. About the role Qunett is seeking a Photonics Engineer to contribute to the photonics team building entangled photon sources and quantum frequency conversion systems. This role is highly hands-on, focused on designing, assembling, and characterizing low-noise, phase-coherent, quantum frequency conversion modules for qubit exchange between telecom and visible wavelengths. Efficient methods of bandwidth exchange between broadband photons from SPDC and narrowband light appropriate for color-center qubits will be essential. Free-space implementation and/or integrated photonics approaches are envisioned. This role will focus on nonlinear optics and quantum frequency conversion within the broader photonics efforts at Qunett. Required qualifications PhD in Physics, Optics, Electrical Engineering, or related field (or MS with equivalent experience) Hands-on experience with nonlinear optics and/or quantum optics in laboratory settings Extensive experience working with spectroscopic-grade laser systems (alignment, safety, modulation, stabilization fundamentals) Experience building and troubleshooting optical setups: free-space and fiber coupling, ABCD matrix analysis and implementation, beam shaping, polarization management, interferometers, and low-noise detection Exposure to single-photon sources and/or single-photon detectors (e.g., SNSPDs/APDs), timing electronics, and basic coincidence measurements Experience using optical design / engineering tools (e.g., Zemax/OpticStudio or equivalent) to design, tolerance, and iterate optical layouts Familiarity with modern software/AI-assisted tools for coding, optimization, and experiment control (e.g., Python-based analysis and automation) Preferred qualifications Experience with SPDC-based entangled photon sources (Sagnac or interferometric geometries), biphoton characterization, and/or HOM-type interference measurements …