Job Description

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, 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 laser-driven nonlinear/quantum optical experiments that generate and measure biphotons (SPDC) and support system integration (filtering, stabilization, coupling, and detection). The role will own well-scoped experimental modules and deliver measurable improvements in coupling efficiency, stability, and performance.

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
• Experience with wavelength-division multiplexing concepts (filters, DWDM components), insertion-loss management, and polarization gates
• Experience with laser spectroscopy in solid-state, atomic, or ion systems
• Exposure to micro/nanofabrication or photonic device integration
• Familiarity with quantum networking requirements (entanglement distribution, link budgets, interface constraints)

Benefits

• Comprehensive health coverage including medical, dental, vision, and prescription plans
• 401(k) retirement plan
• Equity participation through stock options for all new hires
• Flexible time off: unlimited PTO, sick leave, and 11 paid holidays
• Employee support benefits including EAP, caregiver support, healthcare advocacy, and more

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