Open to opportunities

Reinaldo Duzanski Júnior

@reinaldoduzanski

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Senior Data Engineer | Cloud Data Platforms (GCP, AWS, Snowflake, Databricks) | PySpark & Data Architecture

Brazil

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What I'm looking for

I seek roles building cloud-native data platforms with strong technical ownership, client collaboration, and scalable impact.

Senior Data Engineer with 7+ years building enterprise cloud data platforms on GCP and AWS. I design and implement scalable ETL pipelines (PySpark, Airflow, Databricks, Snowflake) that process millions of records daily, reduce cloud costs by 30–40%, and enable real-time analytics.

Recent highlights:
• Delivered a GCP platform serving 50+ analysts with medallion architecture (Bronze/Silver/Gold).
• Cut processing times from hours to minutes with optimized PySpark pipelines.
• Led audit data infrastructure that drove $2M+ in identified savings.
• Implemented real-time streaming for mission-critical dashboards.

Experienced in working with multicultural, global teams (USA, UK, India, China) and skilled at bridging the gap between engineering execution and business needs to deliver measurable results.

Experience

Work history, roles, and key accomplishments

Current

Senior Data Engineer

Current

Thoughtworks

Mar 2024 - Present (1 year 7 months)

Spearheaded design and implementation of a scalable GCP data platform and medallion data lake, leading ETL pipeline development with Dataproc and PySpark to improve data accessibility and streamline analytics workflows.

Google Cloud Platform Pyspark SQL Data Modeling ETL Data Lake Data Warehousing

Senior Data Engineer

Gerdau

Jul 2022 - Mar 2024 (1 year 8 months)

Built and operated robust ETL pipelines to source and structure data from APIs and SAP tables, producing tailored reports and data marts that supported audit decision-making and analytics.

SAP SQL AWS Athena Pyspark Databricks ETL Data Ingestion Reporting

Machine Learning Engineer

ROIT

Sep 2021 - Jul 2022 (10 months)

Developed and deployed deep learning and ML solutions to automate accounting processes for Roit Bank, leading feature engineering, model training, and production deployments within an Agile team.

Deep Learning Machine Learning Python scikit learn Airflow GCP)BigQuery SQL GCP

Business Analyst

Citi

Feb 2018 - Jan 2020 (1 year 11 months)

Acted as a liaison between clients and the bank to gather and analyze requirements, translating insights into product specifications that enabled tailored client solutions.

Business Analysis Requirements Gathering Stakeholder Management Client Engagement Documentation

Java Back-End Developer

HSBC Global Technology Brazil

Mar 2013 - Jul 2015 (2 years 4 months)

Contributed to global backend software projects, collaborating with multicultural teams to deliver distributed systems and enterprise-grade services.

Java Backend Distributed Systems Collaboration REST APIs

Java Full Stack Developer

Supremus Solutions

Jan 2011 - Dec 2011 (11 months)

Developed a commercial ERP system for small businesses, implementing modules for cash flow and inventory management to improve operational control for entrepreneurs.

Java ERP Inventory Management Cash Flow Management