Skip to content

DATA · ML · AI PLATFORM

Systems that hold up when someone asks how they work.

I build data platforms and AI systems that teams can inspect, reproduce, and operate. More than twelve years across software, data engineering, machine learning, and cloud delivery.

Lucas Rangel at work
Building reliable systems, from data foundations to AI delivery.

SELECTED WORK

Public evidence, not a tool list.

Implemented
Code and documentation are public. This alone proves no runtime behavior.
Locally validated
A dated local command, test, or evidence record proves the stated behavior.
Published dataset
The Kaggle slug and version are recorded in the repository.
  • 02Published dataset

    Public data releases

    Brazilian education and procurement data contracts for reproducible releases.

    Two Kaggle datasets, version 1 each. PNCP procurement history: 1,979 rows per layer, notices from 2025-01-01 to 2025-01-07, modality 6. Education data lake: SIOPE annual municipal declarations 2019-2023 joined to IBGE codes, 27,830 municipality-year rows; a clean download was hash-verified.

  • 03Locally validated

    Education MLOps

    Traceable municipality-level anomaly triage from public data.

    v0.2.0 trains a robust peer-group anomaly-triage model on the pinned education Kaggle release. The 2022 batch was scored (96 review signals); the drift gate blocked the 2023 batch (spread ratio 1.384).

    Outputs are review signals only. There are no labels, so no accuracy is claimed.

  • 04Locally validated

    Procurement ranking

    Transparent retrieval and ranking with responsible matching limits.

    v0.2.0 ranks historical notices from the pinned PNCP Kaggle release and verifies its hash before use.

    Offline evaluation uses synthetic profiles with rule-derived judgments, so it measures constraint adherence, not user relevance.

  • 06Locally validated

    Distributed runtime

    Redis-coordinated workers, Kubernetes, Terraform, and recovery tests.

    Local Compose benchmark on 2026-09-24: 48 requests at concurrency 6, 61.89 req/s, p95 147.95 ms. Worker recovery proven on a local kind cluster.

    Deterministic model stub on one Docker Desktop host; not a capacity claim. Cloud not validated.

CAPABILITIES

Each capability points to a public repository.

EXPERIENCE

From software foundations to data and AI platforms.

  1. 2024 — present

    Data and AI engineering

    Data pipelines, AI applications, governance, and observability.

  2. 2023 — 2024

    Data and machine learning

    Lakehouse pipelines, MLflow monitoring, and versioned data assets.

  3. 2022 — 2023

    GCP data and ML

    Composer, Dataproc, Vertex AI, and CI/CD for data systems.

  4. 2014 — 2022

    Software, data, and cloud engineering

    Data platforms, full-stack systems, databases, and embedded software.

WORKING PRINCIPLES

Clear contracts. Measured behavior. Public boundaries.

I use reproducible data releases, explicit evaluation, infrastructure-as-code, and documented limits to make technical work reviewable.