Application & Algorithm Support Engineer - Quantum Computing Hpc Context H/F Quandela

What We Offer: Salary: €45-60k+ depending on experience and scope

- €45-50k : solid profile with around 5 years of experience, strong support foundations and clear potential to grow in complex technical environments.
- €50-55k : more autonomous profile, comfortable handling complex technical issues, with confirmed exposure to HPC, quantum environments, and user enablement.
- €55k+ : senior / expert profile, with experience operating in tripartite contexts (vendor / users / clients) and the ability to interact beyond support with product, R&D, and theory teams.

Profit-sharing & company savings plan.
100% health coverage (Alan), Swile meal vouchers, transport/mobility support.

A Final Word on 'Support' !
At Quandela, support is not a back-office function. It is where science meets reality.
As a Support Engineer, you are the bridge between pioneering researchers and a working quantum machine. The algorithms you help run will shape both today's experiments and tomorrow's roadmap.

It's strategic, it's vital and it's the kind of support that defines whether Europe succeeds in quantum computing adoption.
So ... If you're ready to turn quantum promise into real impact for researchers across Europe, let's talk

What you'll do:

Support & debugging

You will handle application-level support requests related to execution issues, compilation problems, scripting errors or performance limitations. You will debug algorithm workflows and environment configurations, validate installations and updates, and work directly with users to understand the root causes of issues.

In many cases, the problem is not a bug but a mismatch between user expectations and platform constraints. This can involve perfectible workflows, algorithms that are theoretically valid but operationally unrealistic, or habits inherited from other quantum frameworks or QPU types. A key part of your role is to identify these situations early and help users adjust their approach.

User enablement

User enablement is a core dimension of this role. It involves spending time with researchers, on-site at TGCC or remotely, to understand their scientific objectives, level of familiarity with the platform and practical constraints.

Based on these interactions, you will translate system constraints into clear and actionable guidance for users, while bringing structured feedback to Quandela's internal teams. When issues recur, your role is not to fix them endlessly, but to capitalize on them.

This includes producing clear documentation, onboarding guides, execution checklists, reference workflows and practical best practices that prevent common errors. These materials serve external users, internal teams and future support engineers, and aim to progressively raise the overall level of autonomy across the user base.

Community & adoption

As usage grows, you will contribute to structuring and animating the user community around the system. This can include 1:1 sessions to unblock specific use cases, small practical workshops, thematic sessions or shared feedback moments between users.

Over time, this role can naturally extend beyond the local TGCC environment to include other laboratories, cloud users and the broader quantum ecosystem, always with the same application- and user-focused posture.

Coordination & collaboration

You will take part in regular technical reviews with HS and HLST teams and work closely with Quandela's algorithm, software, product and sales teams. Your position allows you to feed real-world usage insights directly into product improvements and roadmap discussions.

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How you'll grow?

During the first months, you will onboard on the support workflows, progressively take ownership of tickets, contribute to initial documentation and start running user sessions. After several months, you are expected to be recognized as a trusted point of contact by users, able to identify recurring pain points a

Quandela is a European start up that provides photonic quantum computers that are modular, scalable, energy-efficient and accessible both on the cloud and on premise.

Our team of 85 employees, specialises in the development of both software and hardware solutions for a variety of quantum applications. We offer a wide range of services, from developing the most efficient and brightest single photons sources, to creating algorithms for quantum computers and providing cloud quantum computing solutions.

Quandela plays a pivotal role as a strategic partner in the quantum transformation of industrial sectors such as energy, finance, pharmaceuticals, and transportation. Furthermore, we are esteemed collaborators within the academic and research community.

- Following a successful €50 million fundraising in 2023, we are now scaling up our commercial ventures alongside our ongoing research endeavors.
- Quandela has been chosen to participate in the French Tech 2030 program, which aims to bolster French companies pioneering groundbreaking innovations.