Numerical Optimization and Simulation Expert

Paris, France Permanent

About Artelys

Joining Artelys means, above all, becoming part of a stimulating environment, made up of passionate experts and giving yourself the opportunity to take part in projects addressing various complex issues, notably addressing the major challenges of our time.

  • To power the Artelys Crystal suite, Artelys has developed an optimization engine that integrates, among other things, algorithms to optimize the deployment of technologies in the energy sector. This computation engine is thus able to solve major problems by relying on advanced operational research techniques, implemented with a strong requirement for numerical efficiency and using parallel computing.

  • Developed and distributed by Artelys, Artelys Knitro is one of the most advanced nonlinear optimization solvers in the world, and used by hundreds of companies, universities, and research laboratories.

  • Delivered to a consortium of European TSOs, the TERRE project (Trans-European Replacement Reserves Exchange) aims at developing an IT platform for the market clearing of services exchanged between the European producers and TSOs. Artelys, together with its partners, is responsible for providing the platform’s market clearing engine. The algorithm will go through the resolution of a large and complex optimization problem, which will take into account the offers of the various suppliers, balancing requests and strict equity constraints between the actors. As the optimization engine is receiving and matching quotes every hour of the day, its robustness and performance are very strongly constrained: results are to be provided within 3 minutes for a problem containing up to 500,000 offers (+ infos).

Job description

As a member of our R&D teams, you will apply your digital skills in the field of operations research to design and develop cutting-edge optimization solvers.

You will often have the opportunity to work on various types of digital libraries developed by Artelys: continuous and mixed nonlinear programming (Artelys Knitro), constraint programming (Artelys Kalis), optimization of energy systems (Artelys Crystal Optimization Engine).

You will be responsible for developing new algorithmic features combining mathematics and computer science, while striving to maintain a high level of software robustness and performance.

Depending on the projects, the solutions developed may fall into three different frameworks:

  • Numerical and combinatorial optimization software developed by Artelys, in particular  Artelys Knitro,  Artelys Kalis , Artelys Crystal Optimization Engine,or PowSyBl Open Load Flow

  • Computation modules for one of our clients

  • Prototypes within research projects in which Artelys is involved


Holder of a PhD in applied mathematics or operations research, or have equivalent experience of at least 3 years after obtaining an engineering degree or higher education qualification, you are the ideal candidate if:

  • You have proficiency in Python or C/C++ programming language

  •  You have expertise in various optimization methods: graph theory, continuous optimization algorithms, combinatorial optimization algorithms, nonlinear optimization, etc.

  • You have proficiency in designing and optimizing algorithms for high performance computing (HPC) environments

  • Fluency in English. French is a plus

Following skills are a plus:

  • You have additional knowledge in software programming (Spring, BDD, NoSQL, REST/Microservices, Message queuing, etc.) and in compilation

  • You are proficient in other programming languages (MATLAB, R, Julia, Java, C#)

  •  You are proficient in linear algebra tools (especially methods for solving linear systems)

  • Previous contributions to open source projects related to numerical optimization, simulation, or computational science would be highly valued. Active participation in relevant communities and networks is appreciated

Curious and enthusiastic, you enjoy tackling complex problems and aspire to develop high-performance, innovative software tools based on cutting-edge mathematical methods. You also demonstrate a high level of rigor in the work you undertake. You aim to contribute to creating a work environment where everyone can develop their skills and initiative.

Working conditions:

  • Permanent contract, managerial status with a 4-month probationary period.

  • Up to 2 days of remote work per week possible.

  • Flexible working hours.

  • Offices located in the city center of each city where we are located

Recruitment process:

Step 1: An initial technical interview via video conference with two recruiters (45 minutes x 2).

Step 2: A second interview via video conference with two other recruiters, as well as a brief 15-minute discussion with the CEO of Artelys (45 minutes x 2 + 15 minutes).

Step 3: If your interviews are successful, we will invite you to visit our premises to make you an offer in person and introduce you to the work environment.

Details about the job
Paris, France
> 3 years
Up to 2 days of remote work per week possible.
Nantes, Lyon, Paris
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