Rejoy Sebastian
Verified Expert in Engineering
Business Intelligence (BI) Developer
Rejoy is a result-oriented data engineer with more than eight years of development experience in data analytics, design, and development of BI solutions. He designs and develops reports and dashboards using multiple platforms and data sources, including AWS. Rejoy thrives in a fast-paced environment with cross-functional teams within Agile methodology.
Portfolio
Experience
Availability
Preferred Environment
Linux, Amazon S3 (AWS S3), Redshift, Pentaho, SQL, Looker, Sisense, Snowflake, Amazon EC2, Dashboard Design
The most amazing...
...thing I've done was work on projects to migrate dashboards from Periscope to Looker and Sisense, with Snowflake and Redshift as respective source databases.
Work Experience
BI Developer
Vertizone IT Pvt Ltd
- Developed data marts using AWS cloud computing tools like EC2, S3, and Redshift.
- Created and maintained Redshift clusters according to client requirements.
- Developed and deployed ETLs using a Pentaho Data Integration to automate data processing in Redshift.
- Managed performance optimization in Redshift and ETLs.
- Coded, designed, and scheduled reports in Pentaho Report Designer 3.9, 5.0, and 5.1.
- Developed complex SQL codes required for reports and ETLs.
- Gained coding experience in MySQL and Postgres database tools.
Executive
KPMG
- Developed ETLs using Pentaho Data Integration.
- Maintained a data warehouse in a SQL server.
- Developed complex SQL codes required for iDashboards and ETLs.
BI Developer
Vertizone IT Pvt Ltd
- Developed data marts using AWS cloud computing tools like EC2, S3, and Redshift.
- Created and maintained Redshift clusters according to client requirements.
- Developed and deployed ETLs using Pentaho Data Integration to automate data processing in Redshift.
- Optimized the performance in Redshift.
- Coded, designed, and scheduled reports in Pentaho Report Designer 3.9, 5.0 and 5.1.
- Developed complex SQL codes required for reports and ETLs.
- Gained coding experience in MySQL and PostGres database tools.
Software Engineer
Verbat Technologies
- Designed and automated various daily, weekly, and monthly report generation.
- Gained experience in SQL development.
- Designed reports in Pentaho.
- Created ETLs to automate report generation.
- Worked with different database tools like MySQL, MS SQL server, and Teradata SQL assistant. I also provided SQL coding support for other development teams.
Developer
NH Infomedia
- Handled server administration at a client's place.
- Made backup plans for an Oracle 10g-based database.
- Performed daily monitoring of the production environment.
- Monitored and reorganized tablespaces, data files, and indexes.
- Took regularly logical backups (export and import).
Experience
Reports Automation Project
The project was completed using Pentaho ETL deployed in a Linux machine. This ETL had multiple parameter inputs based on which, the output files would be different. This ETL internally calls a reporting plugin to generate the report. The reporting plugin runs the report file and generates the report in the specified hard drive or emails the report to the specified recipients. I designed the whole architecture, developed, and deployed it.
Pentaho BI Project
Analytics on Big Data Sets in AWS
Education
Bachelor of Technology in Computer Science
Cochin University of Science and Technology - Kottayam, India
Skills
Languages
SQL, JavaScript, Snowflake
Paradigms
Business Intelligence (BI)
Storage
Redshift, Amazon S3 (AWS S3), PostgreSQL, Oracle DBA, Microsoft SQL Server, Teradata
Other
Pentaho Reports, Data Visualization, Dashboards, Data Analysis, Data Analytics, Data Processing Automation, iDashboards, Dashboard Design
Tools
Pentaho Data Integration (Kettle), Looker, Sisense
Platforms
Pentaho, Windows, Linux, Amazon EC2, Amazon Web Services (AWS)
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