Reactor Simulation Internship– January 2027

Main Activities:

• You will refine and validate Spark's reactor designs by applying state-of-the-art methods and tools, including CFD, chemical kinetics, and heat transfer calculations.

• You will communicate your results to the rest of the team through well-structured calculation notes and presentations – an often underestimated but essential part of the job, since your findings will directly feed into Spark's design decisions.

• As detailed design and manufacturing are delegated to subcontractors, you will review and validate the technical and documentary deliverables they provide, and, when needed, carry out independent counter-analyses.

• You may support test campaigns to advance Spark's understanding of carbon growth and validate reactor designs experimentally.

Main Skills required:

• Education: Engineer from High Education schools, or M1/M2 in CFD / Heat transfer.

• Language: English (Fluent required), French (Nice)

Hard Skills:

• Strong physical intuition – the ability to make sound simplifying assumptions, choose the right level of modeling complexity for the problem at hand, and sanity-check results against real-world physical behavior, in order to reach reliable answers efficiently.

• Hands-on experience in thermal-hydraulics simulation, specifically in (i) Computational Fluid Dynamics (CFD) and reactive flow simulation, or (ii) heat transfer simulation in complex geometries.

• Ability to structure your reasoning on complex topics and communicate clearly, both orally and in writing.

• Knowledge about plasma arc discharges and their modeling is a plus

• Knowledge about high temperature materials and mechanical design is a plus

• Knowledge about radiative heat transfer is a plus

Soft Skills:

• Team Player

• Open-minded

• Planning- and results-oriented mindset

🧪 Recruitment Process

We keep things fast and simple:

• A brief 15-minute phone call with our HR team to get to know each other and discuss the role and your background

• An in-person meeting with the hiring manager, for a more in-depth conversation

• If the discussion goes well, we’ll follow up with a technical case study that will also allow you to know us better

📣 A Note on Diversity and Confidence

Studies show that many women only apply if they meet 100% of the listed criteria. The skills listed here are guidelines, not strict requirements.

We’d be delighted to hear from you even if you don’t tick every single box. We're looking to build teams that can innovate and grow together.

All applications are welcome, regardless of background, age, origin or gender, don’t hesitate to apply !