Roberto Medina

PhD in Computer Science, Real-Time and Embedded Systems · Cork, Ireland

I'm a Senior Software Engineer specializing in Embedded, Operating, and Real-Time Systems. Currently, I'm developing cutting-edge System-on-Chip (SoC) solutions at a top tech company in Cork, Ireland, with a focus on enhancing ARM's TrustZone TEE.

Previously, I designed and developed operating systems for high-performance network devices, employing kernel programming (Linux, Zephyr, RTOSes) and virtualization technologies.

I've also led projects in autonomous driving R&D and contributed to power-aware real-time scheduling in academia. With a Ph.D. background and experience as a Teaching Assistant, I'm skilled in C programming, virtualization, formal methods, and real-time operating systems.

My passion for technology drives me to contribute to Open Source projects like Buildroot, Zephyr, and Linux, always seeking to learn and advance in this dynamic field.

Experience

Senior Software Engineer

Qualcomm Technologies · Cork, Ireland

As a Software Engineer at Qualcomm, I specialize in leveraging my expertise in ARM TrustZone technology to contribute to the development and enhancement of Qualcomm's System-on-Chip (SoC) solutions. My primary focus lies in developing, maintaining and enhancing Qualcomm's Trusted Execution Environment (TEE) - a kernel for ARM's TrustZone.

Additionally, I stay abreast of emerging technologies such as RISC-V, Rust, and Linux's eBPF, ensuring that I remain at the forefront of advancements in the field. This continuous learning allows me to adapt and integrate cutting-edge tools and methodologies into my work, further enhancing Qualcomm's SoC solutions and bolstering my contributions to the evolution of ARM TrustZone technology.

Domains of expertise:

  • ARM TrustZone
  • Kernel proramming
  • Virtualization
  • Android

From August 2023

Senior Research Engineer

Huawei Technologies · Boulogne-Billancourt, France

I am currently developing new technologies for the next generation network equipment.
Particularly focusing on an execution environment delivering high performance in a secured fashion.

Domains of expertise:

  • OS design and programming
  • Virtualization
  • Real-Time systems
  • ARM64 architectures

September 2020 - August 2023

Research and Development Engineer

Expleo Group · Montigny-le-Bretonneux, France

I supervised in-house research projects related to autonomous driving, in particular how SLAM and perception algorithms can be tuned, configured and integrated into a common embedded platform.
I was also in charge of improving resource and timing constraints on existing software used to control a R&D prototype for autonomous driving.

June 2020 - September 2020

Post-Doctoral Researcher

Inria · Paris, France

During my postdoc I was interested in probabilistic scheduling methods. I looked into integrating energy consumption constraints into probabilistic response time analysis for probabilistic real-time systems on unicore processors.
To achieve a realistic model I performed several experiments into real hardware platforms by varying processor and memory speeds.

February 2019 - May 2020

PhD Candidate/Researcher

Télécom ParisTech · Paris, France

My Ph.D. contributions were related to mixed-criticality scheduling for Directed Acyclic Graphs (DAGs). We designed a scheduling heuristic to compute scheduling tables for DAGs on multi-core architectures and we proposed a method to evaluate availability for this type of systems.
All these contributions have been gathered in an open-source framework called MC-DAG.

October 2015 - January 2019

Teaching Assistant

ESIEE - Télécom ParisTech · Paris, France

During my Ph.D. and postdoc I had the opportunity to be a lab assistant at ESIEE and Telecom ParisTech. Courses that I taughts were the following:

  • C programming and operating systems.
  • Real-time scheduling.
  • Modelisation, code generation and verification (using AADL).
  • Embedded Linux (buildroot, u-boot).

October 2015 - May 2020

Education

Université Paris Salcay (carried at Télécom ParisTech)

Phd in Computer Science

Supervised by Laurent Pautet and Etienne Borde.

October 2015 - January 2020

Université Pierre et Marie Curie (Paris 6)

MSc in Distributed Systems and Applications
September 2013 - September 2015

Université Claude Bernard (Lyon 1)

BSc in Computer Science and Mathematics
September 2010 - June 2013

Publications

Journal Papers

  • Generalized Mixed-Criticality Static Scheduling for Periodic Directed Acyclic Graphs on Multi-Core Processors
    Roberto Medina, Etienne Borde and Laurent Pautet
    IEEE Transactions on Computers, 2020
    [ PDF ] [ BibTex ]

International Conferences

  • Scheduling multi-periodic mixed-criticality DAGs on multi-core architectures
    Roberto Medina, Etienne Borde and Laurent Pautet
    IEEE 39th Real-Time Systems Symposium (RTSS), 2018
    [ PDF ] [ BibTex ] [ slides ]
  • Availability enhancement and analysis for mixed-criticality systems on multi-core
    Roberto Medina, Etienne Borde and Laurent Pautet
    Design, Automation and Test in Europe, Conference Exhibition (DATE), 2018
    [ PDF ] [ BibTex ] [ slides ]
  • Directed Acyclic Graphs Scheduling for Mixed-Criticality Systems
    Roberto Medina, Etienne Borde and Laurent Pautet
    Reliable Software Technologies - Ada Europe, 2017
    [ PDF ] [ BibTex ] [ slides ]

International Conferences: Short Papers

  • Work-in-Progress: System-wide DVFS for real-time systems with probabilistic parameters
    Roberto Medina and Liliana Cucu-Grosjean
    IEEE 40th Real-Time Systems Symposium (RTSS), 2019
    [ PDF ] [ BibTex ]
  • Availability analysis for synchronous data-flow graphs in mixed-criticality systems
    Roberto Medina, Etienne Borde and Laurent Pautet
    IEEE 11th Symposium on Industrial Embedded Systems (SIES), 2016
    [ PDF ] [ BibTex ]

Theses

  • Deployment of Mixed-Criticality and Data-driven Systems on Multi-core Architectures
    Roberto Medina
    Ph.D. thesis, Télécom ParisTech, 2019
    [ PDF ] [ BibTex ]
  • Conception & Development of Safety-Critical Systems for Multi-core Architectures
    Roberto Medina
    M.Sc. thesis, Université Pierre et Marie Curie (Paris 6), 2015
    [ PDF ]

Skills

Programming Languagess
  • C
  • C++
  • Rust
Operating systems
  • General public Arch Linux, Ubuntu, Debian, ...
  • Embedded Buildroot, U-boot.
  • Real-time Zephyr, FreeRTOS, RTEMS.

Tools
  • Model Based Engineering OSATE, Eclipse Modeling Framework.
  • Model Checking UPAAL, PRISM, CozyVerif, MiniZinc.
  • Real-time Zephyr, FreeRTOS, RTEMS.

Interests

  • Track/Fixed geared bikes
  • Music (bass guitar)