{"id":20,"date":"2015-07-23T15:31:35","date_gmt":"2015-07-23T15:31:35","guid":{"rendered":"http:\/\/ajcastro.com.pt\/home\/?page_id=20"},"modified":"2026-08-04T11:18:00","modified_gmt":"2026-08-04T10:18:00","slug":"brief-biography","status":"publish","type":"page","link":"http:\/\/ajcastro.com.pt\/home\/brief-biography\/","title":{"rendered":"Brief Biography"},"content":{"rendered":"<p style=\"text-align: left;\"><span style=\"font-size: inherit;\">I was born in Porto, Portugal and I live in Canidelo, Vila Nova de Gaia, Portugal.<\/span><\/p>\n<p style=\"text-align: left;\" data-pm-slice=\"1 1 []\">I&#8217;m specialized in the design of intelligent systems that combine agentic AI, machine learning, optimization, and decision-making to solve complex operational problems at enterprise scale.<\/p>\n<p style=\"text-align: left;\" data-pm-slice=\"1 1 []\">My work focuses on system-level intelligence: how multiple agents, models, tools, rules, and constraints interact to produce reliable decisions at scale \u2014 not just individual model performance.<\/p>\n<p style=\"text-align: left;\" data-pm-slice=\"1 1 []\">I bring together:<\/p>\n<ul>\n<li data-pm-slice=\"1 1 []\">PhD-level foundations in AI (multi-agent systems, reinforcement learning, optimization).<\/li>\n<li data-pm-slice=\"1 1 []\">Hands-on delivery of enterprise GenAI and agentic AI platforms.<\/li>\n<li data-pm-slice=\"1 1 []\">Over a decade designing real-time, safety-critical decision systems in regulated environments such as aviation.<\/li>\n<\/ul>\n<p>In practice, I operate at Staff \/ Principal AI Engineer level, owning the technical direction of agentic systems end-to-end \u2014 from problem formulation and architecture to deployment, evaluation, and iteration. I regularly bridge applied research with production engineering, using research methods when they materially improve system behavior, robustness, or decision quality.<\/p>\n<p>My recent work includes:<\/p>\n<ul>\n<li>Led architecture decisions across multidisciplinary teams.<\/li>\n<li>Defining architecture patterns used for enterprise agentic AI systems.<\/li>\n<li>Designing agentic AI systems using LangGraph \/ LangChain for multi-step reasoning and tool orchestration.<\/li>\n<li>Defining RAG and retrieval strategies optimized for quality, latency, reliability and AI Safety in production.<\/li>\n<li>Building LLMOps \/ AgentOps frameworks (evaluation, versioning, reproducibility, CI\/CD-ready deployment) with Databricks and MLflow.<\/li>\n<li>Developing decision-making agents (single- and multi-agent) using reinforcement learning and optimization techniques.<\/li>\n<li>Deploying cloud-native AI systems with Docker, Kubernetes, and modern API stacks.<\/li>\n<li>Mentored engineers on AI architecture, MLOps and agentic AI practices.<\/li>\n<\/ul>\n<p>Alongside industry work, I remain active in applied AI research and teaching, particularly in autonomous systems, multi-agent coordination, and reinforcement learning, using these foundations to inform real-world AI system design.<\/p>\n<p>I am particularly interested in decision-making under uncertainty, coordination between autonomous agents, and the evaluation of intelligent systems beyond static benchmarks.<\/p>\n<p>At <a href=\"https:\/\/www.issworld.com\/en\" target=\"_blank\" rel=\"noopener\">ISS Tech Team<\/a> I was a Senior Machine Learning Engineer in the Artificial Intelligence Solutions\u00a0 team with the role of senior machine learning engineer.<br \/>\nTo fulfil the team&#8217;s gole I work with:<\/p>\n<ul>\n<li>Generative AI, Agentic AI, LLMs (using Python, Langchain and Langraph).<\/li>\n<li>RAG (Retrieval Augmented Generation), Vector Databases, Semantic Search.<\/li>\n<li>AI evaluation methodologies and metrics.<\/li>\n<li>Databricks, MLFlow, Dataiku, AirFlow, MLOps,<\/li>\n<li>Docker, Kubernetes. Azure Cloud Services, Azure AI Foundry.<\/li>\n<li>Flask-API &amp; FastAPI development. Frontend development.<\/li>\n<\/ul>\n<p>Previously, at <a href=\"https:\/\/www.farfetch.com\/pt\/\" target=\"_blank\" rel=\"noopener\">Farfetch<\/a>, I was a Senior Machine Learning Engineer in the Rankings team with the role of developing machine learning solutions that create rankings for Farfetch and other tenants.<br \/>\nTo fulfil the team&#8217;s gole I work with Python, PySpark, Databricks, Airflow, Azure, Terraform, Jenkins, Docker, CI\/CD, PyTest, MLOps, and MLflow.<\/p>\n<p>Also at Farfetch, I was a Senior Software Engineer, responsible for developing Microservices using .Net Core and the following techniques\/tools: Kafka, Docker, Kubernetes, Cassandra, SqlServer, MongoDB, Redis, Hangfire, ElasticSearch, BigQuery, Logz.io, Jira.<\/p>\n<p>I was a software engineer and the Datakink (ACARS) Program manager at TAP Air Portugal, responsible for software projects related with airline operations control and flight operations. Leading such an extraordinary team of engineers, besides contributing to a better leadership, allows me to contribute to different projects, from vision to a full deployed system, useful for all the company-wide users.<\/p>\n<p>Please check my <a href=\"http:\/\/ajcastro.com.pt\/home\/software-engineer\/\">Software Engineer<\/a> page for more information about my experience.<\/p>\n<p>I perform short to medium term research on AI related fields and I use the outcomes to improve existing products or create new ones. As such, I am a pro bono researcher on Intelligent Systems at <a href=\"https:\/\/liacc.fe.up.pt\/\" target=\"_blank\" rel=\"noopener\">LIACC<\/a>.<\/p>\n<p>Please check my <a href=\"http:\/\/ajcastro.com.pt\/home\/research-interests\/\">Research<\/a> page for more information about the topics and projects related with my research activity.<\/p>\n<p>I am a co-founder, CEO and Head of Operations and Development at <a href=\"http:\/\/masdima.com\/home\/\" target=\"_blank\" rel=\"noopener\">Masdima<\/a>, a company created after the research performed during my PhD which is a University of Porto spin-off.<\/p>\n<p>I like to share knowledge and help others to achieve their potential. I was a Guest Assistant Professor at Faculty of Engineering, <a href=\"https:\/\/sigarra.up.pt\/up\/en\/WEB_BASE.GERA_PAGINA?p_pagina=home\" target=\"_blank\" rel=\"noopener\">University of Porto<\/a>, and at <a href=\"https:\/\/www.ispgaya.pt\/site\/eng\/home\" target=\"_blank\" rel=\"noopener\">ISPGaya<\/a>. These were fantastic opportunities to help my students in reaching their goals. It helps me too, because teaching is the best way to learn.<\/p>\n<p>I want to contribute to a more useful, responsible and trustworthy artificial intelligence and my PhD and MSc on artificial intelligence and intelligent systems, help me to achieve this goal.<\/p>\n<p>I am passionate about space exploration and I believe that AI already is, and will be even more, a huge contribution to this endeavour.<\/p>\n<p>I speak Portuguese (my native language), English and French and I have a special interest in cutting edge technologies. I also like photography, cinema and reading.<\/p>\n<p>My main personal characteristics are: vision, pragmatism and goal oriented. I also think that I&#8217;m good at managing and leading people. But it is better to ask to my colleagues for this one. \ud83d\ude42<\/p>\n<p>Summary of my education and professional experience:<\/p>\n<ul>\n<li>Pro bono researcher at <a href=\"https:\/\/liacc.fe.up.pt\/\" target=\"_blank\" rel=\"noopener\">LIACC-Laboratory of Artificial Intelligence and Computer Science<\/a> &#8211; Distributed Artificial Intelligence &amp; Intelligent Simulation\u00a0Group, since 2004.<\/li>\n<li>Guest Assistant professor at <a href=\"https:\/\/sigarra.up.pt\/up\/en\/WEB_BASE.GERA_PAGINA?p_pagina=home\" target=\"_blank\" rel=\"noopener\">University of Porto<\/a>, FEUP, from Feb\/2022 to Feb\/2025<\/li>\n<li>Guest Assistant professor at <a href=\"https:\/\/sigarra.up.pt\/up\/en\/WEB_BASE.GERA_PAGINA?p_pagina=home\" target=\"_blank\" rel=\"noopener\">University of Porto<\/a>, FEUP, from Oct\/2006 to Mar\/2011.<\/li>\n<li>Guest Assistant professor at <a href=\"https:\/\/www.ispgaya.pt\/site\/eng\/home\" target=\"_blank\" rel=\"noopener\">ISPGaya<\/a>, since Oct\/2021 to Mar\/2024.<\/li>\n<li>Senior Machine Learning Engineer at <a href=\"https:\/\/www.issworld.com\/en\" target=\"_blank\" rel=\"noopener\">ISS Tech Team<\/a> since 2023\/11 to 2026\/06.<\/li>\n<li>Senior Machine Learning Engineer at <a href=\"https:\/\/www.farfetch.com\/pt\/\" target=\"_blank\" rel=\"noopener\">Farfetch<\/a> from 2023\/06 to 2023\/10.<\/li>\n<li>Software Engineer at <a href=\"https:\/\/www.farfetch.com\/pt\/\" target=\"_blank\" rel=\"noopener\">Farfetch<\/a> from 2022\/01 to 2023\/06.<\/li>\n<li>Software Engineer at <a href=\"https:\/\/www.flytap.com\/en-pt\/\" target=\"_blank\" rel=\"noopener\">TAP Portugal<\/a> from 2001 to 2021.<\/li>\n<li><a href=\"http:\/\/masdima.com\" target=\"_blank\" rel=\"noopener noreferrer\">MASDIMA, Lda<\/a>\u00a0Co-founder, CEO and Head of Operations &amp; Development since August 2014.<\/li>\n<li>PhD in Informatics Engineering (Artificial Intelligence) from <a href=\"https:\/\/sigarra.up.pt\/up\/en\/WEB_BASE.GERA_PAGINA?p_pagina=home\" target=\"_blank\" rel=\"noopener\">University of Porto<\/a>, Faculty of Engineering since July 2013.<\/li>\n<li>Postgraduate in Air Transport Operations from <a href=\"http:\/\/www.universitas.pt\/\" target=\"_blank\" rel=\"noopener noreferrer\">ISEC <\/a>since 2008.<\/li>\n<li>Post-graduation Course (attended) in Astrobiology from New University of Lisbon and ESA (European Space Agency) since 2008.<\/li>\n<li>Master Degree in Artificial Intelligence in University of Porto, Faculty of Engineering (<a href=\"http:\/\/antoniocastro.blogspot.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Blog related with my research<\/a>) since 2007.<\/li>\n<li>Web Application Developer at I2S &#8211; Inform\u00e1tica Sistemas e Servi\u00e7os, from 2001 to 2002<\/li>\n<li>Microsoft Certified Systems Engineer in Windows 2000 since Jan 2001<\/li>\n<li>BsC in Informatics Engineering from ISEP, Porto in 1995<\/li>\n<li>Software Engineer, Network Administrator and Crew Manager in TAP Portugal, Porto Base, from 1990 to 2001<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>I was born in Porto, Portugal and I live in Canidelo, Vila Nova de Gaia, Portugal. I&#8217;m specialized in the design of intelligent systems that combine agentic AI, machine learning, optimization, and decision-making to solve complex operational problems at enterprise scale. My work focuses on system-level intelligence: how multiple agents, models, tools, rules, and constraints [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":283,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-20","page","type-page","status-publish","has-post-thumbnail","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"I was born in Porto, Portugal and I live in Canidelo, Vila Nova de Gaia, Portugal. I&#039;m specialized in the design of intelligent systems that combine agentic AI, machine learning, optimization, and decision-making to solve complex operational problems at enterprise scale. 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