About me

I am a software engineer with over seven years of experience creating robust enterprise web applications. I have founded two SaaS-based startups, with one having been acquired. Currently, I am furthering my expertise as a fourth-year software engineering student at Ontario Tech University, and working as a research engineer with the Data Systems Group at the University of Waterloo.

Github    Linkedin    david.rui at uwaterloo.ca

My Projects

• Graph Influence - An implementation of influence functions on different graph neural networks models.
• Neural Network Playground - A collection of different machine learning notebooks.
• Monte Carlo Simulation - A implementation of financial monte carlo simulation for goal based investments in Golang.
• Melhores Ações - A SaaS project in Ruby On Rails containing several fundamental analysis with a beautiful UI.
• React Visual Filter
• Vim RuboCop plugin

Research

I'm especially curious about the fundamentals of geometric deep learning and the applicability of GNNs in solving real-world problems. I believe they can dramatically impact the world in the next few years. My research interest lies in the intersection of graph neural networks and graph databases.

Kùzu DB - University of Waterloo (2023 - current)

Currently working on Kùzu database management core system.

SAIN Lab (Security and Artificial Intelligence Lab) (2021 - 2022)

Performed literature review on graph network papers, developed experiments with graph influence functions, subgraph sampling, differentiable neural architecture search for graphs (AutoML), and knowledge distillation.

Awards

2023 – Undergraduate Research Fellowship (URF) - University of Waterloo

2021 – Undergraduate Student Research Fellowship (USRF) - Ontario Tech

Education

BEng, Software Engineering - Ontario Tech University (2020 - 2024)

Industry Experience

Iris Digital Wealth (2018 - 2020)

As a co-founder, I developed an enterprise-level CRM application for financial advisors in RoR, and a highly scalable cloud structure on AWS services (EC2, ECS, EKR, RDS, S3, ElastiCache, Lambda).

Liberta Global (2016 - 2017)

Developed trading algorithms in Python.

Avante (2014 - 2016)

Joined a startup as CTO at the seed stage. After raising a round of $24M, I was responsible for hiring and leading a team of software engineers, designers and QAs.

XP Securities (2014)

I led a small team to develop a novel onboarding experience for new accounts.

Bolsa Financeira (2010 - 2013)

Founded my first SaaS-based startup, building from scratch a distributed real-time scanner in erlang, ruby and C shared libraries. Acquired by L&S holding, a subsidiary of XP Inc (NYSE:XP)

Misc

I spent two years in the military in Brazilian Army.