Jonas Estepan
New Port Richey,USA
Summary
Senior Business Intelligence Developer with 10+ years of experience designing, building, and optimizing enterprise-scale analytics solutions for large telecom and retail organizations, including Verizon and Staples. Expert in SQL, Snowflake, Oracle, and PostgreSQL, with a strong focus on dimensional data modeling, BI dashboard development (Tableau, Power BI), and performance optimization to support executive and operational decision-making.
Overview
14
14
years of professional experience
Work History
Senior Data Analyst
Newtech S.R.L
, Remote
08.2023 - Current
- Built end-to-end BI solutions using data from Teradata, Oracle, and Adobe Analytics to support enterprise reporting and analytics.
- Performed complex SQL transformations and data modeling to create analytics-ready datasets.
- Developed Tableau dashboards that clearly communicated operational and performance trends to leadership.
- Collaborated with business leaders to define KPIs and convert analytical findings into actionable strategies.
Senior Marketing Circulation Analyst
Joseki Technologies Inc.
, United States
11.2021 - Current
- Designed and optimized Snowflake-based analytical datasets supporting nationwide marketing campaigns and customer segmentation initiatives.
- Developed interactive Tableau and Power BI dashboards to visualize campaign performance, customer behavior, and key business KPIs.
- Partnered with marketing and analytics stakeholders to translate business requirements into scalable BI solutions.
- Improved query performance and data accuracy, enabling faster insights and more reliable decision-making across teams.
Senior Business Intelligence
Newtech S.R.L
, Remote
09.2013 - Current
- Designed and maintained enterprise data models supporting large-scale reporting and business intelligence solutions.
- Optimized complex SQL queries and database structures to improve BI dashboard performance and data refresh times.
- Led multiple database migration projects (DB2 and SQL Server to Oracle), ensuring data integrity and continuity for downstream BI reporting.
- Automated data processes that reduced manual reporting effort and enabled near-real-time analytics for business users.
Quality Assurance Analyst
Newtech S.R.L
, Remote
09.2011 - 08.2013
- Performed backend data validation and SQL-based testing to support enterprise systems.
- Developed SQL reports and served as point of contact for testing initiatives supporting analytics and reporting teams.
Education
Bachelor of Science - Computer Science
Universidad Autónoma De Santo Domingo
Santo Domingo, Dominican Republic02-2013
Skills
- Tableau and Power BI
- Dashboard design
- KPI and executive reporting
- Snowflake and Oracle
- PostgreSQL and SQL Server
- Teradata
- Dimensional modeling
- Star schema
- Fact and dimension tables
- ETL and ELT processes
- Data transformation
- Query optimization
- Data migrations
- Data analysis
- Trend and pattern identification
- Statistical analysis
- Agile methodologies
- Stakeholder engagement
- Requirements gathering
Achievements
- Patented System Contributor (2023): Sole database developer for a nationally patented procurement alert system used for real-time risk detection across the Dominican Republic's public purchasing platform.
- Multiple employee recognition awards for exceptional performance, reliability, and stakeholder support across enterprise projects.
Languages
Spanish
Native/ Bilingual
English
Full Professional
Timeline
Senior Data Analyst
Newtech S.R.L
08.2023 - Current
Senior Marketing Circulation Analyst
Joseki Technologies Inc.
11.2021 - Current
Senior Business Intelligence
Newtech S.R.L
09.2013 - Current
Quality Assurance Analyst
Newtech S.R.L
09.2011 - 08.2013
Bachelor of Science - Computer Science
Universidad Autónoma De Santo Domingo