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Matheus Avellar

PROFILE

Matheus Avellar

Over a 13-month period, contributed to prefeitura-rio’s data engineering platform by building and enhancing municipal health data pipelines and analytics models. Focused on scalable ingestion, robust ETL, and data quality, the work spanned repositories like pipelines_rj_sms and queries-rj-sms. Leveraging Python, SQL, and dbt, delivered features such as memory-safe large file processing, Google Sheets and Cloud SQL integrations, and automated reporting flows. Improvements included schema standardization, code refactoring, and CI/CD reliability, with attention to error handling and observability. These efforts enabled more reliable, auditable health data reporting and streamlined onboarding, supporting scalable analytics and improved data governance.

Overall Statistics

Feature vs Bugs

73%Features

Repository Contributions

272Total
Bugs
34
Commits
272
Features
92
Lines of code
25,333
Activity Months13

Your Network

26 people

Same Organization

@dados.rio
1
miloskimatheusMember

Work History

May 2026

3 Commits • 2 Features

May 1, 2026

May 2026 performance for prefeitura-rio/queries-rj-sms: Delivered data-model enhancements and weekly tagging to improve reporting accuracy, data clarity, and governance. Added mother's name field to the Medilab patient data model and standardized column names across SQL models, enabling consistent analytics and easier cross-model joins. Introduced weekly tagging in bcadastro SQL processing to support granular weekly reporting. No major bugs fixed this month; focus was on feature delivery and data standardization. Business value includes improved data quality, faster reporting cycles, and clearer data lineage. Technologies/skills demonstrated include SQL data modeling, data governance, schema standardization, and version control through commits.

April 2026

1 Commits • 1 Features

Apr 1, 2026

April 2026 monthly summary: Delivered Owner Metadata Tagging for DBT Models in prefeitura-rio/queries-rj-sms, enhancing data model documentation and ownership clarity. No major bugs reported this month. This work contributes to improved data governance, faster onboarding, and clearer responsibilities across the analytics stack.

February 2026

8 Commits • 5 Features

Feb 1, 2026

February 2026 monthly summary: Key features delivered and major fixes across two Rio de Janeiro data pipelines, with emphasis on reliability, scalability, and maintainability. Delivered robust votes data retrieval for TCM Rio de Janeiro, added Google Sheets-based semiannual municipality data extraction schedule, and completed codebase cleanup. In queries-rj-sms, resolved DBT compile issues with dependency caching, tightened CI/CD reliability with timeout, and updated data model tagging to cdi_vps. These changes improve data reliability, reduce pipeline runtimes, lower technical debt, and strengthen governance and performance across the Rio de Janeiro data pipelines.

January 2026

14 Commits • 7 Features

Jan 1, 2026

January 2026 monthly summary: Delivered end-to-end data ingestion, governance, and deployment reliability improvements across two repositories. Highlights include robust Google Sheets vaccination data ingestion with tuned chunk size and backoff for reliability and throughput, CQOS support and a new dbt tag to improve data governance, incremental materialization for the email table to preserve history and enable efficient updates, strengthened CI/CD workflows with cancellations, timeouts, caching, updated actions, and staging/production concurrency, and observability/code quality enhancements including HTTP 429 logging and targeted style cleanups. These changes improved data reliability, throughput, governance, deployment safety, and scalable decision-making across the data platform.

December 2025

17 Commits • 4 Features

Dec 1, 2025

December 2025 monthly summary. Delivered substantial health data engineering and pipeline improvements across two repositories, driving more reliable, scalable health reporting for the municipality. Key outcomes include new data sources, models, and processing enhancements for health reporting (diabetes, hypertension, dental health, VitaHiscare) with JSON extraction and a completed schema migration; migration finalized to gdb_cnes. Improved multilingual text decoding, HTML handling, and character normalization to raise data quality for text-rich fields. Expanded the data pipeline with new BigQuery-ready tables and a JSON conversion utility to streamline uploads for SAP-relevant datasets (Ficha A VitaHiscare, Solicitacao Saude Bucal, Relacao HASDM). Added Gmail API option to enhance notification delivery for emails. Fixed critical data quality issues (parse_date, id_equipe_tipo naming, and duplicate data_cadastro) to ensure accurate, auditable reporting. These efforts bolster business value by enabling faster, more reliable reporting and scalable health data insights.

November 2025

33 Commits • 8 Features

Nov 1, 2025

November 2025 monthly summary focusing on ETL and data platform work across prefeitura-rio/pipelines_rj_sms and prefeitura-rio/queries-rj-sms. Delivered end-to-end GDB extraction improvements, monthly data cadence, code quality and logging enhancements, API robustness fixes, and data model refinements with CNES/GDB exports and geospatial data improvements. Result: more reliable data ingestion into BigQuery, automated monthly processing, and better security/readability for downstream analytics.

October 2025

38 Commits • 12 Features

Oct 1, 2025

Monthly summary for 2025-10 focusing on delivering business value through data quality, security, and scalable data prep across two repositories (prefeitura-rio/queries-rj-sms and prefeitura-rio/pipelines_rj_sms). Key features delivered span updates to HCI training, security reporting infrastructure, training-prep artifacts, and data ingestion enhancements, with ongoing schema evolution to enable faster preparation of datasets for reporting.

September 2025

28 Commits • 10 Features

Sep 1, 2025

Month: 2025-09. Delivered a set of cross-repo improvements across prefeitura-rio/pipelines_rj_sms and prefeitura-rio/queries-rj-sms focused on stability, data quality, and governance. Key features were implemented to stabilize run-time behavior, ensure accurate time-based data, and enrich notifications and data ingestion workflows, enabling safer, more scalable operations for data pipelines and reporting.

August 2025

33 Commits • 15 Features

Aug 1, 2025

Monthly summary for 2025-08 focusing on business value, reliability, and data quality across two Rio de Janeiro SMS pipelines. Key emphasis was on stability improvements, data ingestion modernization, onboarding of new capabilities, and improved observability. Delivered UI polish for a cleaner operator experience, hardened process exits and error handling, and refined retry semantics to support more predictable automation. Implemented ActivationPolicy and CONTINUE_FROM for configurable execution, a new DOU flow, weekend execution support, and added metadata/configuration via DBT TARGETs. Advanced data quality and ingestion improvements included name normalization, training data alignment, and deduplication, plus migration of CDI processing to the DOU API. Overall, these changes reduce runtime errors, improve data integrity, and enable scalable, configurable automation, with improved test coverage and better troubleshooting information.

July 2025

47 Commits • 17 Features

Jul 1, 2025

July 2025 performance summary focusing on delivering higher data quality, robust ingestion, and scalable orchestration across prefeitura-rio/queries-rj-sms and prefeitura-rio/pipelines_rj_sms. Highlights include CNES data quality improvements with fantasia name enrichment during ingestion, dashboard ingestion enhancements with 30-day recency and refined delay metrics, CDI orchestration initialization and email notification features, a suite of reliability fixes (memory usage optimization, worker cap adjustments, RAM/data_partition fixes, and date parsing stabilization), and automation/monitoring enhancements (dynamic recipients via Sheets, DO-RJ status extraction and day-of-week aware reporting with email override, DBT flow triggers, and TCM flow).

June 2025

27 Commits • 5 Features

Jun 1, 2025

June 2025 performance summary for prefeitura-rio/pipelines_rj_sms focusing on delivering end-to-end municipal data flows, stabilizing scheduling, and improving observability and maintainability.

May 2025

18 Commits • 3 Features

May 1, 2025

May 2025: Delivered a cohesive set of end-to-end data-pipeline enhancements for prefeitura-rio/pipelines_rj_sms, focusing on reliability, data quality, and scalable processing. Key contributions span robust CSV processing and encoding handling in the datalake pipeline, a Google Cloud Storage (GCS) to Cloud SQL migration flow with sequencing and safety checks, and reliability improvements for datalake ingestion. These changes reduce memory pressure, improve data integrity, and enable safer, faster data availability for downstream analytics and reporting. Demonstrated strong Python data-pipeline skills, GCS/Cloud SQL integration, and a strong emphasis on observability and governance.

April 2025

5 Commits • 3 Features

Apr 1, 2025

In April 2025, the team delivered a memory-safe, scalable pipeline for prefeitura-rio/pipelines_rj_sms, along with code quality improvements and clearer environment guidance. Key architectural changes focus on large-file ingestion without exhausting RAM, while maintainability and onboarding were improved through lint fixes and updated setup docs. The combined work enhances reliability for production ingest of large payloads and accelerates future development cycles.

Activity

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Quality Metrics

Correctness85.8%
Maintainability84.4%
Architecture81.2%
Performance77.2%
AI Usage21.0%

Skills & Technologies

Programming Languages

DockerfileHTMLJSONMarkdownPythonSQLShellTextYAMLplaintext

Technical Skills

API IntegrationAPI integrationAirflowAutomationBackend DevelopmentBeautifulSoupBigQueryBug FixCI/CDCSV HandlingCSV ParsingCSV ProcessingCloudCloud ComputingCloud Data Pipelines

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

prefeitura-rio/pipelines_rj_sms

Apr 2025 Feb 2026
11 Months active

Languages Used

JSONMarkdownPythonYAMLSQLDockerfileHTMLShell

Technical Skills

Cloud StorageCode RefactoringConfiguration ManagementData EngineeringDocumentationError Handling

prefeitura-rio/queries-rj-sms

Jul 2025 May 2026
10 Months active

Languages Used

SQLYAMLplaintextPython

Technical Skills

BigQueryData EngineeringData WarehousingSQLSQL DevelopmentData Cleaning