Timeline
A life in research, code, and pixels — 1997 to present
2025
GenAICam
Blog
GenAICam - Privacy
Blog
ConCISE: A Reference-Free Conciseness Evaluation Metric for LLM-Generated Answers
arXiv preprint. November 2025
A Robust and Efficient Pipeline for Enterprise-Level Large-Scale Entity Resolution
2025 IEEE International Conference on Big Data (IEEE BigData), 2025, pp. 2359–2368
FeatureCuts: Feature Selection for Large Data by Optimizing the Cutoff
2025 IEEE International Conference on Big Data (IEEE BigData), 2025, pp. 2308–2319
2024
Distinguished AI Scientist — General Manager
Commonwealth Bank
Leading the development of the bank's next generation foundational GenAI models to power enterprise-wide capabilities.
Oct 2024 Present
Codes and Horizons: Luiz's Journey
YouTube
A short documentary tracing the path from southern Brazil to AI research on the other side of the world.
Do LLM Personas Dream of Bull Markets? Comparing Human and AI Investment Strategies Through the Lens of the Five-Factor Model
NeurIPS 2024 Workshop Open-World Agents
A vector embedder for non-natural language data
Australian Patent Filled on 28 Mar 2024
Systems and methods for translating non-natural language data into natural language data
Provisional Australian Patent Filled on 27 June 2024
2023
AITD — Abuse in Transaction Descriptions
Project
Open-sourced dataset and detection model for identifying abusive content in bank transaction descriptions, developed at Commonwealth Bank.
Nov 2023 Nov 2023
Member of Industry Advisory Board
University of Sydney — School of Computer Science
Oct 2023 Present
Beach shadow
instagram
Data Science CAL Lead
Commonwealth Bank
Led Chapter Area Leads and 200+ data scientists delivering modelling and AI solutions across all of CommBank's lines of business.
Jul 2023 Oct 2024
Detection of Abuse in Financial Transaction Descriptions Using Machine Learning.
arXiv e-prints. March 2023
RecSys '23: Proceedings of the 17th ACM Conference on Recommender Systems
Singapore, September 18-22, 2023. ISBN: 979-8-4007-0241-9
2022
Member of Advisory Board for Business Analytics
UTS Business School
Apr 2022 Oct 2023
PD-SRS: Personalized Diversity for a Fair Session-Based Recommendation System
Service-Oriented Computing. ICSOC 2022. Lecture Notes in Computer Science, vol 13740. Springer, Cham
2021
Reciprocal Recommender Systems: Analysis of state-of-art literature, challenges and opportunities towards social recommendation
Information Fusion, Volume 69, 2021, Pages 103-127, ISSN 1566-2535
A fairness-aware multi-stakeholder recommender system
World Wide Web (2021)
2020
Pelican Swim
instagram
Centre of Excellence Lead — AI Labs
Commonwealth Bank
Led CommBank's AI team — built Gen.ai Studio, an AI to detect abusive transaction descriptions, and a weather data model for disaster response.
May 2020 Oct 2024
Sunrise commute in Sydney
instagram
Multistakeholder recommendation: Survey and research directions.
In User Modeling and User-Adapted Interaction (UMUAI). January 2020, Volume 30, Issue 1, pp 127-158
An Ethical Multi-Stakeholder Recommender System Based on Evolutionary Multi-Objective Optimization
2020 IEEE International Conference on Services Computing (SCC), 2020, pp. 478-480
Cryptographic datashare control for blockchain
United States Patent No 10,721,217. 21 July 2020
2019
first day of spring
instagram
PyHeal is released
Blog
Beyond Personalization: Research Directions in Multistakeholder Recommendation.
arXiv e-prints. May 2019
PyHeal
Project
Open-source Python library for easy development with homomorphic encryption, released by Accenture.
Jan 2019 Apr 2020
2018
Work
instagram
2017
Bengaluru
instagram
Hawaii
instagram
Head of Data Science, Liquid Studio ANZ
Accenture
Led elite data science team at Accenture's innovation hub — built AI with homomorphic encryption, adversarial defence systems, and a robotic DJ for AWS re:Invent.
Aug 2017 May 2020
Waikiki Shore
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shadow play
instagram
Domain @ Dusk
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Swimming Sydney
instagram
Carmen'S Firework
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Sleeping Baby
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2016
HK International Airport
instagram
Sai Ying Pun Shops
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Hong Kong Harbour
instagram
Yick Cheong Building
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City2Surf
instagram
HK uni
instagram
Chocolate bum bun
instagram
causeway bay
instagram
Path
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Data Science Immersive Instructor
General Assembly
Taught the first Data Science Immersive in Hong Kong — an intensive 12-week full-time program training 12 data scientists.
Jun 2016 Sep 2016
Sunrise In Manly
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Manly Ferry
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Senior Data Scientist
Commonwealth Bank
Guided AI solutions for business banking clients; key contributor to DailyIQ — CBA's customer-facing business banking analytics tool.
May 2016 Jul 2017
view from home
instagram
golden sydney afternoon
instagram
Cerração
instagram
Praça Vico Barbieri
instagram
Quero ir pra casa
instagram
Fire escape
instagram
Happy Chinese New Year
instagram
city park
instagram
80 William St
instagram
Flaming lips
instagram
homeless teddy
instagram
2015
William Street
instagram
Ceiling lights of the UTS tower
instagram
St Mary's Cathedral
instagram
Hyde Park
instagram
Grand Organ
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Tree And Sunset
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Veteran'S Park
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Window
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On 702 ABC Sydney
Blog
Senior Data Scientist
1-Page
Founding data science team member — architected NLP algorithms powering hiring, assessment, and innovation platforms including Source.hr.
Feb 2015 Mar 2016
Curiosity
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2014
Odaiba
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Rain In Tokyo
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Sunset In St Kilda
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No Reflection
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Playing With Shadows
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Jacaranda
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Caravan
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Tulip
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Pier 8
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The Coathanger
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Boat Harbour
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Melbourne Dawn
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Vivid
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Sunset In Kyoto
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Lone Blossom
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Praying
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48 Windows
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Newtown Park
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Blank
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Sydney Thunder
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Director
Octosocial Labs
Co-founded startup applying people-matching algorithms to help users find friends and support networks. Built two iPhone apps.
Mar 2014 Nov 2017
Welcome
Blog
São Pedro
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Bom Dia Bento Gonçalves
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Darling Quarter Lights
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2013
Bridge At Twilight
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Pink Umbrella
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Spice Shop
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Ferry Ride
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Waverly
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Mount Annan
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Blue Tree
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National Park
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Chinese Restaurant
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Hmas Vampire
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Bora Bora Stars
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Ready To Launch
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Omg The Fish
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Night Time Gold
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Poster Wall
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Spark
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On The Road
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Sweet Thailand
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Stop Here, Not There
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Gpo
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Sydney Uni
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1892 Building
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Port Botany
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Arches
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瓶盖
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Chinese New Year
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Pow
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Bangkok Life
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Scrutable User Models and Personalised Item Recommendation in Mobile Lifestyle Applications.
Proceedings of the 21st International Conference on User Modeling, Adaptation and Personalization (UMAP 2013). Rome, Ita
Recommending people to people: The nature of reciprocal recommenders with a case study in online dating.
User Modeling and User-Adapted Interaction (UMUAI). November 2013, Volume 23, Issue 5, pp 447-488
2012
Poser
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Hatta
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Crossroads
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The Garden
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Principal Consultant
Pizzato Data Science Consultancy
Provided AI and machine learning consultancy across organisations, specialising in intelligent processing of large and diverse datasets.
Nov 2012 May 2016
Royal Crescent
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Parlament Window
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Bustling Kraków
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Needle
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Cold Coast Sunset
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Sunset @ Goldcoast
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The Power Of Angels
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Jetty And Birds
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Stolen
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All Angles
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The Cane Train
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Research Fellow
University of Sydney
Research fellow in the School of Computer Science.
Mar 2012 Mar 2014
Lake House
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Explicit and implicit user preferences in online dating.
New Frontiers in Applied Data Mining, volume 7104 of Lecture Notes in Computer Science, pages 15–27. Springer Berlin / H
Using Wikipedia and Conceptual Graph Structures to Generate Questions for Academic Writing Support.
IEEE Transactions on Learning Technologies, vol. 5, no. 3, pp. 251-263, Third Quarter 2012
The effect of suspicious profiles on people recommenders.
Proceedings of the 20th International Conference on User Modeling, Adaptation and Personalization (UMAP 2012). Montreal,
Proceedings of the 1st International Workshop on TV and multimedia personalization (TVM²P 2012)
UMAP 2012, Montreal, Canada, July 16, 2012
Proceedings of the Second Workshop on Community Mining and People Recommenders
ECML/PKDD 2012, Bristol, UK, September 28, 2012
2011
Rail Past
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The Rock
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Hear No Evil
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Yellow Field
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Inner West Life
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We got a tail
flickr
Into the steam
flickr
The most amazing sky
flickr
Blue-Winged Kookaburra
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Blue Sky, Rainforest
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Finding someone you will like and who won't reject you.
Proceedings of the 19th International Conference on User Modeling, Adaptation and Personalization (UMAP 2011). Girona, S
CCR - A Content-Collaborative Reciprocal Recommender for Online Dating
Proceedings of the 22nd International Joint Conference on Artificial Intelligence (IJCAI 2011). Barcelona, Spain. 16-22
Stochastic Matching and Collaborative Filtering to Recommend People to People
RecSys '11: Proceedings of the Fifth ACM Conference on Recommender Systems. Chicago, 23-27 October 2011
Proceedings of the First Workshop on Community Mining and People Recommenders
IEEE ICDM 2011, Vancouver, Canada, 2011
2010
Guitarra Flamenca
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What A Clown
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South Australia
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Reciprocal Recommenders.
Proceedings of the Workshop on Intelligent Techniques for Web Personalization & Recommender Systems (ITWP'10) at User Mo
Reciprocal Recommender System for Online Dating
RecSys '10 (demonstration session): Proceedings of the Fourth ACM Conference on Recommender Systems. Barcelona, 26-30 Se
RECON: A Reciprocal Recommender for Online Dating.
RecSys '10: Proceedings of the Fourth ACM Conference on Recommender Systems. Barcelona, 26-30 September 2010
Learning User Preferences in Online Dating.
Proceedings of the Workshop on Preference Learning (PL-10) at the European Conference on Machine Learning and Principles
2009
Shower In Rio
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Postdoctoral Researcher
University of Sydney
R&D for Smart Services CRC — pioneered reciprocal recommender systems (online dating), mobile personalisation, and news recommendation with Fairfax Media and Woolworths.
Mar 2009 Mar 2012
Proceedings of the Australasian Language Technology Association Workshop 2009
Sydney, Australia, 2009
2008
Cradle Mountain
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Using Linguistically Motivated Features in Document Retrieval for Question Answering
PhD Thesis. Macquarie University, Australia. 2008
Indexing on Semantic Roles for Question Answering.
Proceedings of the Coling 2008 Workshop Information Retrieval for Question Answering (IR4QA-08). Manchester, August, 200
2007
Snooker Break
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Taking the shot
flickr
Fallen
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Umbrella
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Double the trouble
flickr
Grape juice flowing
flickr
a baiana e o mar
flickr
I Want The Orange One
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Aparados
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Question Prediction Language Model.
Proceedings Australasian Language Technology Workshop 2007, Melbourne, December 2007
2006
Hitting the green
flickr
nothingness
flickr
GPO archs
flickr
Trophies
flickr
Into the light
flickr
The beach army
flickr
Buddhist Monk at the Beach
flickr
Follow the path
flickr
Pseudo Relevance Feedback Using Named Entities for Question Answering.
In Proceedings of the Australasian Language Technology Workshop 2006. Sydney University, November 2006
AnswerFinder at TREC 2006.
The Fifteenth Text REtrieval Conference (TREC 2006)
2005
Canola Fields
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Sydney Harbour At Night
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South Sea Island
flickr
not your average day
flickr
Question Classification by Structure Induction.
Proceedings of the Nineteenth International Joint Conference on Artificial Intelligence (IJCAI-2005). Edinburgh, Scotlan
Classifying Sentences using Induced Structure.
Proceedings of the Twelfth Symposium on String Processing and Information Retrieval (SPIRE-2005). Buenos Aires, Argentin
Extracting Exact Answers using a Meta Question Answering System.
Proceedings of the Australasian Language Technology Workshop 2005. The University of Sydney, Australia, December 10-11,
2004
Casual Academic
Macquarie University
Tutoring in algorithms, C++ programming, and introduction to IT.
Aug 2004 Dec 2007
Intrinsic and Extrinsic Evaluation of a Thesaurus-Based Query Expansion Technique.
Presented at the 2004 IEEE/WIC/ACM International Conference on Web Intelligence (WI'04). Beijing, China, September 21-24
Using a Trie-based Structure for Question Analysis.
Proceedings of the Australasian Language Technology Workshop 2004. Macquarie University, Sydney, Australia, December 8,
PhD in Computer Science
Macquarie University
Using Linguistically Motivated Features in Document Retrieval for Question Answering
Jan 2004 Dec 2008
2003
Estrutura Multitesauro para Recuperação de Informações.
Master Thesis. Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS). 2003
Query Expansion Based on Thesaurus Relations: Evaluation over Internet.
Computational Linguistics and Intelligent Text Processing, Lecture Notes in Computer Science. Vol. 2588. ISBN 3-540-0053
Evaluation of a Thesaurus-Based Query Expansion Technique.
Proceedings of the 6th Workshop on Computational Processing of the Portuguese Language - Written and Spoken. Lecture Not
2002
Lecturer
Universidade de Passo Fundo
Taught Programming, Operating Systems, and Structured Programming across Computer Science and Information Technologies bachelor programmes.
Feb 2002 Aug 2002
Estrutura Multitesauro para Recuperação de Informações.
Anais do XIII Simpósio Brasileiro em Informática na Educação (SBIE'02), Workshop de Ontologias (WONTO). São Leopoldo, RS
Desenvolvimento e Avaliação de uma Estrutura Multitesauro para Recuperação de Informações.
Proceedings of the I Workshop de Teses e Dissertações em Inteligência Artificial (WTDIA), XVI Brazilian Symposium on Art
Desenvolvimento e Avaliação de uma Estrutura Multitesauro para a Recuperação de Informações.
Proceedings of the XXVIII Conferencia Latinoamericana de Informática (CLEI 2002). Montevideo, Uruguay. 25-29 November 20
AnswerFinder
Project
Question answering system developed at Macquarie University's Centre for Language Technology — an early RAG-style system using Flat Logical Forms for semantic document retrieval.
Jan 2002 Dec 2007
2001
Master of Science
University (Brazil)
A Multi-thesaurus Structure Applied to Information Retrieval
Jan 2001 Dec 2003
2000
Researcher
HP / PUCRS High Performance Computing Lab
Maintained Linux HPC clusters, developed communication and graphical libraries, and coordinated undergraduate interns.
Jan 2000 Dec 2001
1997
Internship — Delphi Developer
Interop
Redesigned and redeveloped the company's main point-of-sale software, including the first version of their auto-update framework.
Sep 1997 Oct 1999
1995
Bachelor in Computer Science
University (Brazil)
A Virtual Environment for Distance Learning
Jan 1995 Dec 2000