Description

Data Engineer specializing in ETL development, data migration, and legacy system modernization.

I have hands-on experience working with Informatica PowerCenter, SQL, and enterprise data pipelines. I focus on building reliable, scalable ETL workflows and supporting organizations in transitioning from legacy systems to modern cloud-based data platforms such as Snowflake.

What I can help you with:

ETL pipeline development and maintenance (Informatica, SQL)
Data migration projects (Informatica to Snowflake or cloud platforms)
Legacy ETL modernization and performance optimization
SQL development, data validation, and troubleshooting
Production support, incident resolution, and pipeline monitoring

I am detail-oriented, reliable, and experienced in handling production environments, including debugging failures and ensuring smooth data operations.

Currently expanding my expertise in Snowflake and modern data engineering tools, with a strong focus on migration and cloud transformation projects.

Open to remote freelance and contract opportunities across Europe and globally.

Industry field of expertise

Languages

English
Native or bilingual

Workplace preferences

Can work on-site

Lisbon (up to 50km)

HN Services
Data Engineer – SAS to Snowflake Migration
TECH
September 2025 - Today (9 months)
Lisbon, Portugal
Reverse-engineered complex SAS Credit Risk scripts and migrated them to Snowflake SQL, preserving business logic and calculation accuracy. Re-architected legacy SAS processes into cloud-native Snowflake transformations, improving scalability and performance. Built Snowflake SQL transformations supporting ingestion, transformation, and curation of enterprise data pipelines. Validated migrated pipelines through SAS vs Snowflake reconciliation and parallel runs, ensuring reliable and auditable migration outcomes.
SQL Snowflake Data Migration and Backup Cloud Integration ETL (Extract, Transform, Load) Processes
Aubay Portugal
Data Integration Developer
April 2024 - August 2025 (1 year and 4 months)
Lisbon, Portugal
Designed and optimized Informatica data pipelines supporting large-scale insurance data platforms. Improved batch performance through SQL, PL/SQL, and performance tuning, reducing execution times and improving stability. Collaborated with analysts and business stakeholders to translate requirements into scalable, production-ready data workflows.
SQL ETL (Extract, Transform, Load) Processes Batch Processing Informatica Database Management (e.g., SQL, NoSQL)
aiDataWorks
Data Engineer - IICS/Snowflake
January 2022 - January 2024 (2 years)
Delivered end-to-end data modernization projects using Informatica IICS, including cloud deployment and scheduling. Integrated data from on-prem and cloud databases (Oracle, Teradata, Snowflake) within enterprise data platforms. Supported migration and platform transition initiatives, ensuring stability and delivery timelines.
informatica cloud Snowflake Cloud Integration SQL Database Management (e.g., SQL, NoSQL)

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Master's Degree Data
Jawaharlal Nehru Technological University
2022
Master's Degree Data
Bachelor's Degree Computer
Keshav Memorial Institute of Technology
2016
Bachelor's Degree Computer

Check out Gayatri's education

Data Engineer

Gayatri Gurram

Data Engineer – Informatica/Snowflake

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