Melbourne, Australia · AI/ML leadership

Diego Marinho de Oliveira

Senior Engineering Manager / Principal AI

Production Agentic AI, Search & Recommender Platforms

Industry career since 2009 AI leadership across property and employment marketplaces 9 industry organisations

Diego Marinho de Oliveira
Email Diego
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AI/ML leader with 10+ years shipping production systems across Oceania, Asia and South America—managing up to 18 data science and ML engineering professionals across three teams, from strategy to consumer and business impact in agents, search, recommendations and multimodal AI.

Production AI scope

  • Agentic AI First conversational AI Real-time at realestate.com.au
  • Personalized search 14% lift Overall user interaction · JobsDB HK
  • Recommenders 7 Asia + ANZ MY, SG, PH, TH, ID, HK and VN
  • Leadership Up to 18 people Managed across three AI/ML teams and cross-functional delivery
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Career

Professional experience

A record of building teams and shipping measurable AI systems across property, employment and hiring marketplaces.

Current role

Senior Engineering Manager / Principal AI

Machine Learning · REA Group (opens in a new tab) · Melbourne, Australia

Global digital property business · home to realestate.com.au.

— Present

  • Built and managed up to 18 data science and ML engineering professionals across three teams, partnering with Product Managers, Heads of Product, Delivery Managers/Leads, UX/Design, Security, Legal, Consumer and GTM leaders.
  • Designed and implemented the end-to-end GenAI property-search solution, including evaluation and structured outputs; led its cloud-scale deployment in one month, helping change a search approach established over 25+ years.
  • Designed and implemented the AI agent framework and production agentic runtime for realestate.com.au’s first production, real-time conversational AI—including tool access, guardrails and request/response contracts—and led the design, evaluation and vendor comparison for memory.
  • Led the definition and rollout of AI governance controls across rate limiting, evaluation, monitoring and guardrails; partnered with Security to ensure the penetration test was completed and the solution passed its security checks.
Agentic AIAI agentsAI search Multimodal AIEvaluationGovernance

AI / Data Scientist Manager; Senior Data Scientist; Data Scientist

SEEK (opens in a new tab) · Melbourne, Australia

Online employment marketplace operating across Australia, New Zealand and Asia.

—

  • Built and led a global data science team of approximately 10 while hiring across multiple AI teams.
  • Across controlled online experiments in ANZ and seven Asian markets, delivered 5–10x gains in a primary recommendation metric, with a 12x peak uplift in one market.
  • Delivered a unified recommender platform across ANZ and seven Asian markets—MY, SG, PH, TH, ID, HK and VN—serving millions of users across real-time homepage, email and push experiences.
  • Designed and implemented the end-to-end JobsDB AI search replacement—from source-data ingestion and enrichment through synonym expansion, AI-enriched lists, retrieval and behaviour-aware reranking—delivering a 14% lift in overall user interaction in a controlled Hong Kong experiment.
Recommender systemsSearch ranking ExperimentationMulti-market platforms

Lead Data Scientist

Catho (opens in a new tab) · São Paulo, Brazil

Brazilian technology and online recruitment platform.

—

  • Led a small team of data scientists and engineers delivering production recommender systems for candidates and hirers, improving both candidate and hirer experiences through real-time systems at scale, including more than 115% uplift in a primary user engagement metric.
Earlier AI/ML and software engineering journey · —
  1. Machine Learning Engineer · RBS Group / Appus–Built recommender systems, NLP, forecasting and classification with Python, Scala, Java, AWS, Redis and MongoDB.
  2. Machine Learning Specialist · Zunnit TechnologiesDeveloped large-scale information retrieval and content recommendations for commerce and news using Java and Python.
  3. Software Engineer · Vale / Visagio–Delivered real-time Java/GWT operational software supporting iron-ore supply management.
  4. Software Analyst · TOTVS–Developed global HR software in C#/.NET.
  5. Research Assistant · Computational Intelligence Lab–Applied artificial neural networks to forecasting, contributing to peer-reviewed IEEE research.

Selected work

AI systems shipped

Representative systems spanning AI agents, multimodal inference, information retrieval and recommendations.

First real-time conversational AI

Production · consumer-facing · scalable in cloud

Designed and implemented the AI agent framework and production agentic runtime for realestate.com.au’s first production, real-time conversational AI—including tool access, guardrails and request/response contracts—and led the design, evaluation and vendor comparison for memory.

AI agentsTool useObservability

GenAI property search

Helped change a 25+ year search approach in one month

Designed and implemented the end-to-end GenAI property-search solution, including evaluation and structured outputs; led its cloud-scale deployment in one month, helping change a search approach established over 25+ years.

Generative AIAI searchProduction

Related public coverage: realestate.com.au’s AI search and conversational experience — Mediaweek (opens in a new tab)

Unified recommender platform

ANZ + seven Asian markets

Replaced isolated market solutions with a reusable platform serving millions across real-time homepage, email and push recommendations in MY, SG, PH, TH, ID, HK, VN and ANZ.

RecommendersRankingExperimentation

Multimodal attribute extraction

45+ property attributes in real time

Delivered production computer vision and multimodal transformer inference that extracted semantic property-photo attributes for downstream search and listing quality.

Multimodal AIComputer visionTransformers

Expertise

Leadership + technical depth

Hands-on technical judgement paired with team, product and operating leadership for production AI.

Agentic AI & GenAI

AI agents, agent orchestration, tool calling, stateful workflows, memory, structured outputs, embeddings, evaluation, guardrails and fine-tuning.

AI search & recommendations

Information retrieval, hybrid and semantic search, search relevance, ranking and reranking, learning-to-rank, sequential recommenders and large-scale personalization.

Evaluation, safety & MLOps

Agent evaluation, continuous evaluation, online experimentation, observability, tracing, guardrails, AI governance, latency and cost control across AWS, GCP and Vertex AI.

Teams & strategy

Organization design, hiring, mentoring, executive OKRs and cross-functional product strategy—translating AI opportunities into reliable systems, reusable platforms and measurable outcomes.

Research & recognition

Grounded in the field

Industry recognition, recommender-systems research and a computer science foundation.

Selected recognition

  • Winner, REA Hackdays — Hack it Forward Award for Community, Social & Environmental Good (2024)
  • Top performer, Databricks Gen-AI Australia Cup (2023)

Languages: English (fluent), Portuguese (native), Spanish (basic).

Let’s discuss production AI leadership.

For senior AI/ML leadership, agentic AI platform, search or recommendation opportunities, email me or connect on LinkedIn.