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Yago Novaes NevesYN
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Yago Novaes Neves

@yagonovaesneves

Software Engineer at Nubank building reliable lakehouse data systems and real-time serving layers for operations.

Brazil
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At Nubank, I work underneath the dashboards, owning data engineering for two operations domains across modeling, data contracts, serving, and observability. I replaced a fragile join with deterministic correlation, bringing the null rate on key fields down from 7.76% to about 0.16%.

At Sinch, I designed a statistical anomaly detection framework that reduced global data platform costs by 40%, and migrated telecom billing pipelines processing 2 billion monthly events from Dataflow to dbt Cloud. At will bank, I scaled invoice processing from 500 to 16,000 emissions per run with asynchronous Python and Athena, without additional infrastructure cost.

I'm also building on the applied AI side: I presented a distributed multi-agent architecture using A2A and MCP at TDC 2025, and developed a clinical RAG assistant evaluated with an automated RAGAS harness. My thesis architecture and evaluation set are open source; the ablation study found the embedding model mattered more than the generator.

Experience

Work history, roles, and key accomplishments

Nubank logoNU
Current

Software Engineer, Data

Aug 2026 - Present (2 months)

Data engineering on a lakehouse over AWS S3 with Spark (Scala) and Delta Lake, including Kafka and Flink streams written into Delta tables.

Own two operations data domains end to end: modeling, data contracts, real-time serving datasets and observability.

Own the migration off a legacy platform (51 data contracts). Automated lineage and access control for sensitive data, scoped in Terraform.

Nubank logoNU

Data Engineer (Analytics Engineer)

May 2025 - Aug 2026 (1 year 3 months)

Sole data engineer for two operations domains on a lakehouse (S3, Delta Lake) with Spark and Scala.

A deterministic 1:1 correlation between two systems cut key-field nulls from 7.76% to 0.16%, recovering ~88,700 records.

Built a cross-team alerting mesh that catches data regressions before the product. Lambda and Databricks ingestion proved 80% of reported errors were false positives.

Sinch logoSI

Data Engineer (Sr Data Analytics Eng.)

Apr 2024 - Apr 2025 (1 year)

Migrated telecom billing pipelines (2B events/month) from GCP Dataflow to dbt Cloud, with incremental models and reconciliation tests for global financial close.

Led the initiative that cut global cloud data cost by 40% with a statistical anomaly-detection engine in dbt.

Built a near real-time layer on ClickHouse and Cube. GCP provisioned with Terraform.

will bank logoWB

Analytics Engineer

Jul 2021 - Apr 2024 (2 years 9 months)

Built the team's warehouse from zero: Kimball medallion architecture in dbt on Redshift and Athena, orchestrated with Airflow. Ended 100% of manual data extraction.

Scaled invoice processing from 500 to 16,000 per run with an async Python pipeline, at zero infra cost.

Scraping joined to transactional events showed 20% of users had NFC iPhones, unlocking the Apple Wallet launch.

will bank logoWB

Data Analyst

Jul 2021 - Jun 2022 (11 months)

Product Analytics (Apple Wallet): Engineered a web scraping pipeline integrated with dbt and AWS Athena to enrich device hardware data. Discovered a highly counterintuitive 20% iOS/NFC user base, effectively unlocking the Apple Wallet launch and driving new Marketplace smartphone campaigns.

Foundational Infrastructure: Transitioned the Lifecycle team's analytical capabilities from manual extracti

(QI)³ - Inteligência de Negócios logoQN

Product Owner, Data Warehouse and ETL

Jan 2020 - May 2021 (1 year 4 months)

Technical product owner for an end-to-end data warehouse and ETL pipelines (Pentaho, Hadoop) for B2B clients such as Instituto Unibanco, leading delivery with a team of data engineers.

Mapped industrial processes on site and turned them into KPIs and Tableau dashboards.

Education

Degrees, certifications, and relevant coursework

US

Ufes - Universidade Federal do Espírito Santo

Bachelor of Science in Production Engineering, Engineering

2018 - 2022

IS

Ifes - Instituto Federal do Espírito Santo

Technical Degree in Electromechanical Systems, Mechatronics, Robotics, and Automation Engineering

2013 - 2016

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