Hello, I’m

Leonel
Parrales

Data Engineer

Hero

ABOUT ME

ABOUT ME

Hi There! I'm Leonel Parrales

Data Engineer

Passionate, hard-working individual that is constantly looking for new challenges in life. Intrinsic motivated to be part of the Digitalization and make radical changes in companies.

  • Birthday : Sep 22, 1997
  • Phone : +593 98-000-5123
  • Email : leonelparrales22@gmail.com
  • From : Quito, Ecuador
  • Language : English, Spanish
  • Freelance : Available

SERVICES

SERVICES

Front-End Developer

Give me a design ready to program and I'll do wonders. I like to use ReactJS, and program all the components, validations, tasks that the project requires. I would accept to take challenges with any other framework in the market.

Back-end Developer

Among so many technologies to create a REST API my favorite is NodeJS with Express, even so if it is a predictive modeling or Machine Learnings project the option I prefer to use in these cases is Python with Flask or Django.

Database Management

Beyond using SQL language I have managed users and permissions in database managers such as MySQL, Postgres and MongoDB. I have also worked with large amounts of data in SQL Server in my experience as a Data Engineer.

Cloud Computing

In my career the cloud computing I managed the most was AWS, between EC2 and Route 53 services, yet I have also employed Azure services such as Data Lake Storage Gen2 and Azure Databricks for handling large amounts of data.

VPS Management

I love to manage VPS, install database managers on it like MySQL and PostgresSQL. And creating an application deployment environment. I managed my university's VPS for a while. I have used VPS from AWS, Azure, DigitalOcean, Oracle Cloud.

Docker Containers

Several of the projects I deployed were through Docker containers using CEDIA's servers and that's where I started using it. Because of the image repository that exists in Docker Hub it is a great way to save time. Just as I did to deploy R Shiny applications.

MY SKILLS

MY SKILLS

All the skills that I have in that field of work are mentioned.

The technologies I like to work with vary according to the project needs. I love using the ReactJS framework when it comes to handling Javascript. For the Backend side, NodeJS is the solution I use the most.

To deploy projects I have used different clouds, including DigitalOcean, AWS and Azure. I love to manage VPS and I try every time to get as much performance out of it as possible.

When it comes to handling large amounts of data I opt for Python because the performance it gives me is brutal. I have worked hand in hand with data scientists so I know that R is a viable option for predictive models.

Front-end Developer

85%

Back-end Developer

90%

Database management

90%

Cloud Computing

85%

VPS Management

90%

Docker Containers

90%

RESUME

RESUME

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Experience

Data Engineer

July 2025 - Present

Banco Pichincha - Devsu

✅ End-to-End ETL Pipeline Development: Designed and implemented ETL processes from raw data layers to finalized dataproducts used as critical inputs for business decision-making.
✅ Real-Time Data Processing: Built real-time ETL pipelines using Kafka topics for data consumption, Apache Flink for transformation, and Kafka for reprocessing and output.
✅ Data Workflow Orchestration: Managed and automated complex data workflows using Apache Airflow, ensuring reliable and efficient pipeline execution and monitoring.

Data Engineer

July 2022 - July 2025

Produbanco - Grupo Promerica

✅ Full Data Pipeline Ownership: Designed and implemented complete ETL/ELT processes, moving data from raw ingestion (raw) through transformation to a fully refined, analytics-ready state (gold/curated).
✅ Data Product Development: Exposed key strategic data assets through the creation of robust REST APIs for seamless internal and external consumption.
✅ Automated Decision Systems: Engineered and deployed critical business rules for automated credit approval processes, including scoring models and policy enforcement.
✅ Process Automation: Successfully reduced operational timelines and increased efficiency by developing and implementing targeted technological solutions.
✅ Requirements Management: Managed project lifecycles with a strong focus on quality, end-to-end traceability, and strict regulatory compliance.

Software Development Engineer

October 2021 - July 2022

Confiamed S.A.

End-to-End ETL Pipeline Development: Designed and built robust ETL processes using C# .NET Core for data extraction, transformation, and loading, ensuring scalable and maintainable architectures.
Real-Time Data Processing: Developed SOAP/REST services to enable seamless data integration between disparate systems, facilitating efficient data flow across the organization.
Data Workflow Orchestration: Automated critical business processes involving data handling, reducing manual intervention and improving data accuracy and timeliness.
End-to-End Data Solutions: Implemented full-stack data solutions—from backend data processing to functional user interfaces—ensuring data accessibility and usability for business stakeholders.

Data Engineering Intern

March 2021 - September 2021

Banco Pichincha

✅ Advanced Business Intelligence
✔ Developed interactive dashboards using R Shiny.
✔ Data transformation for strategic decision-making models.
✅ Large-Scale Data Processing
✔ Designed optimized ETL/ELT pipelines.
✔ Managed large data volumes in cloud and on-premise environments.
✅ Tech Stack
✔ Microsoft Stack: SQL Server, SSIS, Azure Data Lake, Azure Databricks.
✔ Cloud Data: Ingestion, transformation, and storage in Azure.
✔ Data flow automation with Databricks (PySpark/Scala).

Research Study Assistant

March 2021 - September 2021

Universidad Politécnica Salesiana del Ecuador

✅ Advanced Cloud Management:
✔ Implementation and administration of VPS servers on AWS (EC2, EBS, VPC).
✔ Configuration of secure and scalable environments.
✅ Databases & Storage:
✔ PostgreSQL/PostGIS (for geospatial data).
✔ MySQL and MongoDB for NoSQL solutions.
✔ Query optimization and index management.
✅ Scientific/Technical Documentation:
✔ Creation of professional LaTeX templates for technical papers.
✔ Documentation of architectures and data workflows.

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Education

Computer Science Engineering

2017 - 2022

Universidad Politécnica Salesiana del Ecuador

Degree obtained. 5 years of study. Basic to advanced knowledge in computer science.

Datacamp Certifications

2021 - Present

Datacamp™

Certificates obtained in Data Engineer and subjects related to data analysis.

Udemy Certifications

2018 - Present

Udemy™

Certificates obtained in programming, database management and frameworks.

PORTFOLIOS

PORTFOLIOS

TEAMWORK

TEAMWORK

CONTACT ME

CONTACT ME

Contact Info

Contact me on my social networks or send me a message to get in touch. I will get back to you as soon as possible.

Email

leonelparrales22@gmail.com

Phone

+593 98 000 5123

Address

Quito, Ecuador