Software Engineer

At Isentroniq, we are building the future of computing, not in theory, but in hardware. We enable quantum computing at scale by developing superconducting circuits solutions to increase the qubit count by more than a 100x at fixed cost and size of infrastructure. We share knowledge openly, challenge ideas constructively, and stay focused on what matters. Our values - gritty ambition with humility, radical candor, methodical audacity and sense of belonging - are at the core of how we work and grow. If you’re passionate about transformative innovation, and ready to build what quantum needs to go further, join us and let’s shape the future together. The Role We are looking for our first Software Engineer, who will build the foundations of our data-acquisition workflows, database architecture, and will develop our first simulation tools to model how our product impacts the performance of quantum operations. In this role, you will work hand-in-hand with our RF and quantum engineers on highly technical, high-impact projects. This is a rare opportunity to enter the quantum-computing world at a pivotal moment and to contribute directly to the growth of a fast-moving deep-tech startup. Key Qualifications Develop a simulation tool that models quantum impact of wiring architectures and associated libraries for each component on the wiring chain. Build a front-end interface for the simulation software, easy to use and accessible to clients via the web or as a standalone application Design and implement automated calibration andend-to-end data acquisition pipelines Setup and maintain structured databases of quantum measurements, prototype characteristics and system metadata Provide software and IT support to the team, helping diagnose and resolve technical issues arising during development Who You Are You’re a true jack-of-all-trades engineer, comfortable across both back-end and front-end. You know how to build solid foundations that can scale. You write rigorous, clean, and maintainable code, and you enjoy exploring new technologies, including AI. You value open, constructive discussions and thrive in a team where people challenge and support each other. Most importantly, you’re motivated by the opportunity to join an ambitious team pushing the boundaries of hardware and helping unlock a new era of scalable quantum computing. Key Qualifications 5Y+ Experience with modern front-end frameworks, eg. React, Vue, Svelte Strong software-engineering fundamentals: CI/CD pipelines, testing, documentation, development environments, Git, and code quality standards. Strong proficiency in Python for scientific computing, simulation development, and data pipelines. Experience with back-end development eg. Node.js or Python frameworks like FastAPI/Flask/ Django and designing databases (eg. Postgres, MySQL) Previous experience with time-series data stores and observability tools including querying and visualizing data, eg. InfluxDB, Grafana. Bonus Master’s degree (M2) in Computer Science or Engineering Experience in connecting software to real hardware (instrumentation APIs, drivers, or data acquisition workflows). Ability to use AI assisted coding tools (e.g. Cursor, Claude Code, GitHub Copilot) Familiarity with data-visualization libraries (e.g. D3, Plotly, ECharts). Proficiency in French Personal Attributes You are a builder. You are hands-on, enjoy discomfort and are not afraid to draft from a white page : complete setups, scripts, processes, etc. You embody an engineer’s mindset, with meticulous attention to details and a systematic approach to problem-solving. You value transparency and open communication, fostering trust and collaboration. You enjoy having your ideas and suggestions be boldly challenged and you feel free to speak about achievements and mistakes. You are eager to learn and grow. You recognize the strength of teamwork. You feel challenged by competing alternative approaches, instead of looking down on them. You thrive in an environment of high expectations, pushing boundaries to achieve breakthroughs. What We Offer A unique opportunity to shape the technological direction of a cutting-edge start-up. The unique chance to develop a scale-up-enabling products and the quantum test machines and software that will drive the company’s success. A collaborative, mission-driven culture with a focus on personal and professional growth. Competitive salary and equity package. How to Apply Please send your CV and a cover letter outlining your relevant experience and motivation to careers@isentroniq.com. Feel free to include examples of previous work (e.g., GitHub) as well.Applications will be reviewed on a rolling basis, so we encourage early submissions. #J-18808-Ljbffr