---
title: 'Spin Qubit Calibration Engineer at Equal1'
canonical: 'https://feeny.ai/job/spin-qubit-calibration-engineer-equal1-delft-d0attrhvmsm6'
type: 'job'
last_seen: '2026-09-05'
---

# Spin Qubit Calibration Engineer at Equal1

- **Company:** Equal1
- **Location:** Delft, Netherlands
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-02-23
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.ashbyhq.com/equal1/6e93a10d-cd28-4b59-b30a-bb96639d05ea

## Job description

We are seeking a highly skilled and motivated Spin Qubit Calibration Engineer to join our cutting-edge research and development team in one of our international locations. You will play a key role in advancing our quantum processors by calibrating, tuning, and optimizing spin qubit devices. Your work will directly contribute to the performance and scalability of quantum computing systems.

## MAIN DUTIES AND RESPONSIBILITIES

- Qubit Calibration: Calibrate and fine-tune spin qubit systems to optimize gate fidelities, coherence times, and overall device performance.
- System Optimization: Collaborate with quantum hardware teams to improve qubit initialization, readout processes, and error-correction techniques.
- Hardware & Software Integration: Work closely with cross-functional teams to ensure smooth integration of quantum hardware with control electronics and software.
- Algorithm Development: Develop and implement automated calibration routines and control sequences using advanced programming techniques to enhance qubit stability and system robustness.
- Problem Solving: Address challenges such as qubit decoherence, charge noise, and crosstalk using experimental techniques and data-driven approaches.
- Software Tools: Utilize and develop software tools in Python for data analysis, qubit control, and calibration automation. Collaborate using version control systems (e.g. Git) to manage and document code and project development.
- Documentation & Reporting: Maintain detailed records of calibration processes, results, and device performance, and present findings to technical teams.
- Research & Innovation: Contribute to research efforts aimed at improving the scalability and efficiency of quantum computing hardware.

## EXPERIENCE AND QUALIFICATIONS

Required

- Education: M.Sc http://M.Sc. or Ph.D. in Quantum Physics, Electrical Engineering, or a related field.
- Experience: Hands-on experience with calibrating and measuring solid state quantum devices, such as spin qubits or superconducting qubits.
- Technical Skills:
- Strong background in quantum mechanics and semiconductor device physics.
- Proficiency in cryogenic systems or low-temperature experiments.
- Experience with RF and microwave electronics for qubit control and signal generation.
- Expertise in Python for data analysis, control automation, and experimental optimization.
- Familiarity with Git or other version control systems for collaborative software development.
- Knowledge of quantum control software, and experience working with integrated hardware-software systems.
- Problem-Solving Skills: Ability to diagnose and resolve complex issues in quantum devices.
- Communication: Excellent technical writing and presentation skills for sharing results with internal teams.

-

Desired Experience

- Prior experience with spin qubit systems or semiconductor-based quantum technologies.
- Understanding of quantum error correction and multi-qubit architectures.
- Familiarity with scalable quantum computing hardware and quantum information theory.
- Experience with software development best practices, such as version control, code documentation, and collaborative coding.

If you are a highly motivated and experienced Spin Qubit Calibration Engineer looking for a new challenging and very rewarding role, we encourage you to apply for this exciting opportunity.

## About Equal1

## Company Overview
- **One-liner**: Equal1 builds the world's first rack-mounted silicon quantum computers designed to deploy alongside classical CPUs and GPUs in standard data center infrastructure.
- **Entity Type**: Private (Series A, last raised $60M in January 2026)
- **Headquarters**: Dublin 4, Ireland (with offices in Fremont, CA; Delft, Netherlands; Sherbrooke, Canada; Timișoara, Romania)
- **Founded**: 2017
- **Founders**: Dirk Leipold (President & Co-Founder), R. Bogdan Staszewski (Co-Founder)

## Core Business
- **Primary Industry**: Quantum Computing / Nanotechnology / High-Performance Computing
- **Target Customers**: Enterprise and government data centers, HPC clusters, AI labs, defense and aerospace organizations (current customer includes the European Space Agency)
- **Mission Statement**: "Quantum will not deliver from the lab. It delivers when it becomes deployable: infrastructure that can be bought, run, scaled and trusted inside high-performance compute environments."

## Products & Services
- **Equal1 RacQ**: A rack-mounted silicon quantum computer that fits into a standard server rack with standard power and cooling. It runs alongside existing CPU/GPU infrastructure and supports hybrid quantum-classical workloads. Currently shipping to customers.
- **UnityQ**: The silicon quantum processor (QSoC - Quantum System-on-Chip) built in standard CMOS foundries. Each generation adds more qubits, higher fidelity, and exponential compute within the same rack footprint.
- **Quantum Solutions**: Capabilities for optimization (logistics, portfolio, scheduling), simulation (molecular systems, materials science), Monte Carlo (risk, pricing, modeling), and Quantum AI (training paths beyond classical scaling).

## Market Standing
- **Total Funding**: $106.5M across 12 rounds (last round: $60M in January 2026 led by Ireland Strategic Investment Fund)
- **Valuation**: Not publicly disclosed
- **Notable Investors**: Ireland Strategic Investment Fund, Matterwave Ventures, Atlantic Bridge, Enterprise Ireland, Elkstone Partners, EIC Fund
- **Key Partnership**: Signed a deal with **Nvidia** (September 2024) for hybrid supercomputer and quantum systems
- **Growth Signals**: 
  - RacQ already shipping to customers including the **European Space Agency**
  - Headcount growing 15.6% YoY (38 employees as of mid-2026)
  - Opened Dutch lab in 2024, partnered with TNO (Netherlands Organisation for Applied Scientific Research)
  - 34 patents filed in quantum information science
  - Multiple generations of silicon already proven

## Competitive Advantages
- **Silicon CMOS Advantage**: Unlike other qubit modalities (superconducting, ion trap, photonic) that require exotic manufacturing, Equal1 builds in standard silicon foundries — making their chips manufacturable, deployable, and upgradeable at scale.
- **Rack-Mounted Form Factor**: The only quantum computer that fits in a standard data center rack with standard power and cooling — no cryogenic infrastructure or dedicated quantum facility required.
- **Deployed Today, Not "Soon"**: RacQ is already shipping to paying customers, including a major space agency.
- **Nvidia Partnership**: Direct integration with the dominant AI/HPC ecosystem.

## Strategic Focus
- Scaling qubit count and fidelity with each UnityQ processor generation
- Deepening hybrid quantum-classical compute integration with Nvidia
- Expanding commercial deployments into optimization, simulation, and AI workloads
- Building out the software stack and framework engineering team
- Growing headcount in engineering, quantum error correction, device physics, and software roles

## Why Work Here
- **Work Environment**: "Hybrid by default" — employees work across offices in Ireland, Netherlands, US, Canada, and Romania
- **Culture**: Rated 5.0/5.0 on employer review sites (Work-Life: 5.0, Compensation: 5.0, Culture: 5.0, Career: 5.0)
- **Team**: Small (~38 people), highly technical (26% technical, 15% research), with talent from Intel (5 alumni), University College Dublin (7), TNO, Qualcomm, and Movidius
- **Impact**: You'd be building deployable quantum infrastructure that's already shipping — not just doing research
- **Career Growth**: Open roles include VP of Quantum Software Engineering, Quantum Error Correction Lead, Senior Verification Engineer, Spin Qubit Calibration Engineer — indicating serious scaling of the engineering team
- **Notable**: Employees have gone on to Stanford, PsiQuantum, Qualcomm — showing the team is deeply embedded in the quantum ecosystem

## Sources
1. [equal1.com](https://www.equal1.com/)
2. [equal1.com/company](https://www.equal1.com/company)
3. [LinkedIn - Equal1](https://www.linkedin.com/company/equal1)
4. [CB Insights - Equal1](https://www.cbinsights.com/company/equal1labs)
5. [Jobs.ashbyhq.com/equal1](https://jobs.ashbyhq.com/equal1)

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