Missions

The scientific computing expert will participate in the prototyping of infrastructures and in the development of computing methods, in order to solve scientific problems linked to simulation and data processing in cosmology. These missions are framed within the future space mission LISA, in which the L2IT is involved. Under the supervision of the head of the team ``Computing, Algorithms and Data'' of the L2IT, the expert will collaborate closely with the ``Gravitational Waves'' research team at L2IT.

Activités

• Take part in the prototyping, the development, and the optimization of the performance of LISA data analysis chains; port them on target infrastructures;
• Provide to physicists an expertise in the development of codes, optimized for a given architecture and computing cluster;
• Explore innovative methods (new numerical methods, including artificial intelligence) for LISA data analysis;
• Analyze the needs in terms of technology, sizing and services (for instance developer and user interfaces) of infrastructures for data analysis; facilitate their implementation with partners;
• Report on the advancement of ongoing projects; present results in appropriate meetings of the LISA consortium;
• Take care of the production of technical documentation to allow the evaluation of the technical solutions explored (software, services, technologies, network...).

Compétences

• Proven knowledge of at least one modern and performant programming language (C++17, Python, Julia, ...);
• Deep knowledge in the implementation of a software quality approach (methods, tools, norms and processes);
• Understanding of modern computing architectures; define a technology monitoring;
• Proven experience of collaborative software development in an international environment;
• Knowing how to be pedagogical, how to accompany and advise;
• Knowing how to relay and report information through the redaction of technical documents and scientific publications;
• Proven experience in scientific research.

• Proficiency with technical English: C1 level in the Common European Framework of Reference for languages;
• Experience with LISA data analysis or simulations for the science of gravitational waves, and their interpretation, would be a plus.

Contexte de travail

The ``Laboratoire des 2 Infinis - Toulouse'' (L2IT) is a young and dynamic laboratory created in 2020 to conduct fundamental research with new numerical and theoretical approaches for data analysis. The laboratory's research is focused on particle physics, gravitational waves, and the equation of state of nuclear matter, and relies on a complementary development of analysis methods and data science by the team ``Computing, Algorithms and Data'' (CAD). The ``Gravitational Waves'' (GW) team at L2IT pursues research on theoretical and experimental aspects of gravitational wave science, with an emphasis on the exploitation of new approaches linking theory to observations, through data analysis and numerical simulations. The ``GW'' team is part of the LISA comsortium and of the Virgo collaboration.

The position's missions are framed within scientific studies for the future space mission LISA, conducted in an european effort including numerous member-states of ESA (European Spatial Agency). The LISA mission has been adopted by ESA in January 2024, marking a turning point in the discovery potential in cosmology. Indeed, LISA will allow us to observe gravitational waves in the mHz frequency band, opening a new window on the astrophysics of the distant universe. Among the mission's target are the supermassive black hole binaries at the dawn of their growth, a large number of white dwarf binaries in our galaxy, and extreme mass ratio systems. The LISA data analysis raises new challenges: its data will be dominated by the superposition of these numerous signals, in unknown numbers, which will require a global analysis of the physical parameters of all sources, jointly with the characterization of the instrumental noise, its evolution and data interruptions. The development of this global analysis is an active research field and represents an exploratory frontier, in terms of design as well as performance. France, through CNES, is responsible for a global analysis module as a deliverable within the LISA mission.

The successful candidate will be a major actor of these developments and their implementation in the LISA DDPC (Distributed Data Processing Center), a european effort driven by several ESA member states. He/she will work in close collaboration with scientists involved in LISA at L2IT (members of the teams GW and CAD), with the LISA ground segment team at CNES, and with colleagues from the whole LISA consortium.

Contraintes et risques

Travels must be foreseen, both in France and abroad.