Diogo Freitas

Embedded Software Engineer

Mannarino Systems & Software Inc.

• Developed embedded software in C for electric motor inverter propulsion control of eCTOL and eVTOL aircrafts.
• Debugged issues and measured runtime performance of the software the using Lauterbach TRACE32.
• Analyzed worst-case execution time and rebalanced the bare metal scheduler to assure real-time deadlines were met.
• Experimented Simulink and Embedded Coder configurations to generate C code compliant with the coding standard.
• Reviewed and corrected code generation using static analyzer Helix QAC to generate MISRA compliant source code.
• Wrote test procedures and implemented automated test scripts in Python for the verification of airborne software HLRs.
• Drafted and reviewed HLRs, LLRs and software architecture documentation.
• Achieved at least 50% reduction of execution time while refactoring one function from the in-house math library.
• Investigated hypothesis of pipeline stalls, cache misses, and unintended linkage of object code.
• Created life cycle data artifacts to support the fulfillment of DO-178C and DO-331 objectives applicable to DAL A software.

Embedded Software Engineer

Volvo Group

• Developed embedded software for BMS (Battery Management System) at cell and pack level for electric trucks and buses.
• Implemented production-grade software for battery state estimation algorithms from existing POCs.
• Developed Diesel engine control functions using Model-Based Design (MBD) tools (MATLAB, Simulink and TargetLink).
• Achieved 40% reduction in CPU load after refactoring existing functions. Also, helped to decrease memory footprint.
• Developed Python scripts to automate time consuming tasks and deliver them 9x faster.
• Implemented and tested CAN & SAE J1939 functionality using tools like ATI Vision, Vector CANoe and CANalyzer.
• Refactored the drafts of Functional Safety Requirements for compliance with ISO 26262.
• Analyzed data from connected vehicles already operating in the field to evaluate performance of our algorithms.
• Tested the developed functions in open/closed loop verification environments using MiL (Simscape), SiL (GDB) and HiL (dSPACE) tools.
• Assisted in-vehicle tests to validate engine functions (e.g. engine brake, cruise control, fuel economy).
• Lectured a hands-on online training sessions to my peers (Git, Bitbucket, Regex).
• Led innovation initiatives within the team (e.g. design thinking workshops, hack days).

Autonomous Driving Intern

ZF Group

• Developed the embedded software controlling a medium-duty driverless tractor with SAE Automation Level 2.
• Implemented application software using C to control vehicle speed, Power Take-Off (PTO) and hydraulic implements.
• Designed from scratch an embedded software architecture for a brand-new general-purpose ECU.
• Implemented Hardware Abstraction Layers (HALs) above low-level drivers supplied by the semiconductor vendors.
• Developed embedded software using C to interface peripherals (e.g. CAN controllers, WiFi modules and SD cards).
• Performed field tests of automated driving features in realistic conditions of a real-world environment (e.g. farms, test tracks).

IT Applications Trainee

ExxonMobil

• Supported Software Development Life Cycle (SDLC) activities, including requirements, coding, testing & deployment.

Chalmers University of Technology

MicroMasters® in Emerging Automotive Technologies

128^th place @ QS World University Rankings 2019

Federal University of Technology Paraná (UTFPR)

Bachelor of Computer Engineering

49^th place @ Times Higher Education Ranking 2018 Latin America

Electric Engine Inverter

Developed functions and infrastructure to spin the motor of an electric airplane.

Battery Management System (BMS)

Developed algorithms for state estimation, power management, diagnostics, safety monitors and other battery functions.

D13K Diesel Engine (Proconve P8)

Participated on the development effort for the creation of new software strategies to control engine auxiliary systems.

Virtual Rigs

Virtual electronic architecture implemented in Vector CANoe to simulate ECU signals consumed by the automated tests.

Lindner TracLink Pilot - Copy & Paste

Developed software to control:

• Vehicle and engine speed
• Power take-off (PTO) activation
• Hydraulic implement

SmartFare

Awarded the 2nd place on a nationwide design contest of IoT applications promoted by NXP Semiconductors.

Mobile Robotics Algorithms

• Calculating attitude angles (roll, pitch, yaw) with gyroscope data
• Create a point cloud based in images from a depth camera (RGB-D)
• Obstacle detection based in 3D point cloud
• Localization algorithm using data association and triangulation methods
• Estimation of robot heading angle in a global reference frame
• Occupancy grid with obstacle detection

Real-time Systems Lab

Achieved real-time constraints by loading customized kernel modules that implemented inter-process communication between two threads using a shared memory location. Object-oriented drivers were developed using C++ to interface peripherals like ADC, DAC and encoder.

3D Environment Scanner

A device built to map internal environments and plot it in a point cloud custom software.

Latin American Festival of Free Software Installation (FLISoL)

Course Instructor

Activities:

• Lectured a introductory course to Regular Expressions (regex).

Barco Sorriso

Volunteer

Activities:

• Supported a group of dentists who travel by boat to provide free dental care to remote riverside communities with poor access to health services.

Presbyterian Church of Brazil

Deacon & Head of Events

Activities:

• Served as deacon of my local church.
• Planned, managed and executed social events of the church, with 5-digit budgets.
• Developed a quiz buzzer machine to be used in activities with the kids.

NASA International Space Apps Challenge

Hackathon Mentor

Activities:

• Provided technical mentorship to teams working in embedded systems & IoT projects.

Free Software Technology Forum (FTSL)

Course Instructor

Activities:

• Lectured a introductory course to the Perl programming language.

Students@ZF

International Team Member

Activities:

• Organized recreational events to integrate ZF’s interns and to promote networking.

Farol da Madrugada

Volunteer & Translator

Activities:

• Spread a life-changing message of hope to marginalized people wandering the streets after midnight.
• Coordinated and revised the translation of the organization’s website and flyers to English.

Hillsong Church

Welcome Lounge Team Member

Activities:

• Welcomed and connected newcomers in church.