PsiQuantum Tech Stack

Photonics-based quantum computer platform targeting million-qubit systems

Computer Hardware Manufacturing Palo Alto, California 501–1,000 employees Founded 2015 Privately Held

PsiQuantum is building a quantum computer using silicon photonics as its core substrate, with the long-term engineering goal of reaching 1,000,000 qubits and solving error correction—the threshold they identify as necessary for practical utility. The tech stack (Rust, Python, Verilog, SystemVerilog, SolidWorks, FPGA) reveals a hardware-centric organization balancing photonic circuit design with systems and control software. Active hiring is heavily weighted toward engineering (41 roles), with half at senior or staff level, suggesting they're scaling specialized hardware disciplines (cryogenic systems, photonic integrated circuits, thermal-mechanical simulation) rather than adding generalist headcount.

Tech Stack 17 technologies

Core StackRust Python ADP C++ SolidWorks Silicon Photonics FPGA Silicon photonics Photonic Integrated Circuits Git Verilog SystemVerilog DCS PLC SCADA ADP Workforce Now SQL

What PsiQuantum Is Building

◆Challenges

Deploying million-qubit quantum systems
Scaling quantum computer production
Scaling quantum computers
Fault tolerant quantum computing
Test throughput improvement
Scaling quantum computing infrastructure
Large-scale deployment challenges
Scaling quantum systems
Securing government funding
Developing test infrastructure for high speed electro-optical subsystems

▲Active Projects

Utility-scale quantum computer build-out
Quantum data centers build-out
System commissioning of quantum computing systems
Develop active photonic components for fault-tolerant quantum computer
Cryogenic system design
Designing photonic integrated circuits for loqc
Utility-scale quantum computers
Repair plan design for complex failures
System commissioning projects
Thermal mechanical simulation and design for quantum computer

Hiring Activity

Steady55 roles · 20 in 30d

Department

Engineering

Ops

Research

Manufacturing

Finance

Sales

Seniority

Senior

Mid

Staff

Junior

Intern

Manager

Principal

Director

Notable leadership hires: Director, Computing Infrastructure

Company intelligence

Find more companies like PsiQuantum by tech stack, pain points and active projects

Get started free

About PsiQuantum

PsiQuantum, founded in 2015 and based in Palo Alto, designs and builds quantum computers using photonics technology. The company positions photonics as the only viable path to the performance targets required for practical quantum applications in medicine, energy, and finance. Their immediate engineering effort focuses on utility-scale system build-out, quantum data center infrastructure, active photonic component development, and the test and commissioning pipelines needed to validate each generation of hardware. The team spans quantum physicists, semiconductor engineers, systems architects, and software engineers, with operations spanning the US, Australia, the Netherlands, and the UK.

HeadquartersPalo Alto, California

Company Size501–1,000 employees

Founded2015

Hiring MarketsUnited States, Australia, Netherlands, United Kingdom

Frequently Asked Questions

What technology does PsiQuantum use for quantum computers?

Silicon photonics. The company uses photonic integrated circuits, FPGA, Verilog/SystemVerilog for design, and Rust/Python for control systems. They also deploy cryogenic systems and thermal-mechanical simulation tools for hardware integration.

Where does PsiQuantum hire?

United States, Australia, Netherlands, and United Kingdom. The US is primary, but the company maintains distributed engineering presence across four countries.