Experience

• 

  Taurus SA

  • DevOps Engineer

    • Jan 2022 - Present

• 

  CERN

  • Meyrin, Geneva, Switzerland

  • Software Coordinator

    • Jan 2021 - Dec 2021
    • Meyrin, Geneva, Switzerland

    As co-coordinator of the level-1 trigger online software of the CMS experiment, I took care of: - maintaining the level-1 trigger online software - coordinating development of new software and its integration - designing and developing new softwareI worked on re-designing the online monitoring backend of the level-1 trigger by integrating a central Prometheus monitoring instance, services exposing metrics in OpenMetrics format, Grafana monitoring dashboards, and alerting via alertmanager.The goal was to improve the ability of the system to diagnose issues and provide informative alerts by correlating metrics from multiple data sources, thus improving the trigger reliability and reducing downtime and stress on the experts.Each service was containerised in Docker. CI and CD techniques were used to test software and continuously deploy containers on an OpenShift test cluster outside of the production network. I also worked on configuring, packaging and integrating control and monitoring software tools of a global trigger test crate. The purpose of the crate is to test new trigger firmware in parallel to the production trigger system. Developing this control software requires extreme care to make sure that the test system does not interfere in any way with the production system. Each tool was initially deployed and tested outside of the production system network in a Docker container. The same software configuration was then deployed on a test instance inside the production system network. Testing was then performed when the experiment is not running. Only when the software tool was deemed safe, final testing was done in dedicated experiment test runs.

• 

  CERN & University of Bristol

  • Switzerland
  • Research Services
  • 700 & Above Employee

  • Doctoral Researcher

    • Feb 2017 - Nov 2020

    - I built a parameterised simulation of the level-1 trigger of the CMS experiment to estimate trigger rates of a system with equivalent performance running at the Future Circular Collider (FCC) and understand challenges of data acquisition systems at FCC. The results showed that detectors at FCC-hh may have to develop sophisticated multi-object triggers in order to be sensitive to interesting physics in the high pile-up environment of the experiment and maintain a reasonable accept rate at the same time. I contributed with my research to the FCC-hh Conceptual Design Report and to defining the European Strategy for Particle Physics.- I developed the flagship algorithm for detecting hadron jets and computing energy sums of the Phase-2 upgrade of level-1 trigger in the CMS detector. I designed the algorithm and studied its reconstruction performance in Geant4 simulations of the CMS detector to verify that it provided satisfactory reconstruction performance. I wrote firmware targeting Xilinx KU115, KU15P and VU9P FPGAs using High-Level Synthesis tools. I demonstrated the algorithm on trigger hardware mounting KU115 and KU15P FPGAs and validated its output against CMS simulations obtaining an agreement rate of 96%. Results from this work were included in the technical design report of the Phase-2 upgrade of the CMS level-1 trigger.- I contributed to maintaining the Online Software of the level-1 trigger of the CMS experiment. This work was fundamental in ensuring smooth detector operations during the Run-2 of the CMS experiment by providing information on the system status to experts and helping in diagnosing issues occurring during data taking.- I was the on-call expert of the level-1 trigger of the CMS experiment for three weeks. I was responsible for preparing the system for data taking and solving any potential issue that could arise during operations.

  • INFN Fellowship

    • Nov 2016 - Jan 2017

    I developed an algorithm to find hit doublets in the CMS tracker for Nvidia GPUs using CUDA. This work was performed in view of the Run-3 of CMS when GPUs will be employed in high-level trigger to reconstruct tracks.

• 

  CERN

  • CERN, Meyrin (CH)

  • MSc Student

    • Jan 2016 - Jul 2016
    • CERN, Meyrin (CH)

    - I computed the tau trigger efficiency turn-on curve by applying tag and probe techniques to Z^0 -> tau tau decays. Results from my work contributed to every analysis involving the H -> tau tau process, including the H -> tau tau observation.- I developed the general control and monitoring web interface for the CMS L1-Trigger. This interface provides detailed information on the system status and it was routinely used by experts during Run-2 to promptly diagnose critical issues occurring during data taking.