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Abirbhaba Sahu

@abirbhabasahu

Principal Database Engineer at Tessell, delivering database migrations with replication and Data Guard strategies for near-zero downtime.

India

Message

At Tessell, I execute end-to-end database migrations to the Tessell platform, from assessing source architecture and preparing rollback strategies to validating data integrity and application connectivity. I design and implement replication and Data Guard strategies to achieve near-zero downtime migrations.

Previously, at Clovertex, I led a database team and supported Oracle and PostgreSQL environments, including AWS migrations, Oracle upgrades, and database automation. At Oracle India Pvt. Ltd., I supported OCI Database Cloud products and used Oracle Zero Downtime Migration and MV2ADB to move databases to OCI Cloud and Autonomous Database.

Experience

Work history, roles, and key accomplishments

Current

Principal Database Engineer

Current

Tessell

Nov 2025 - Present (11 months)

Executes end-to-end database migrations to the Tessell platform, including architecture assessment, migration planning, and near-zero downtime strategies. Coordinates with customer and internal teams during cutover and provides post-migration support and performance tuning.

Database Migration Oracle PostgreSQL Dataguard Replication Performance Optimization Troubleshooting Documentation

Senior Database Engineer

Intuitive Cloud

Jun 2025 - Nov 2025 (5 months)

Managed and optimized Oracle and PostgreSQL database environments across cloud and on-premises platforms. Supported database migration, performance tuning, and high availability initiatives for enterprise clients.

Oracle PostgreSQL Cloud Computing On Premises Database Migration Performance Optimization High Availability

Principal DBA

Clovertex

Mar 2022 - Jun 2025 (3 years 3 months)

Led a database team providing L3 support, managed AWS RDS and OCI infrastructure, and performed Oracle patching, upgrades, and Data Guard maintenance. Automated tasks with Python, Ansible, and Terraform, and administered PostgreSQL in high-volume production environments.

AWS RDS AWS DMS CloudFormation OCI VCN Oracle RAC Dataguard PostgreSQL Barman EFM Python Ansible Terraform Oracle RMAN OEM AWR ADDM TKPROF Explain Plan Druva

Principal Software Engineer

Oracle India Pvt. Ltd.

Aug 2020 - Mar 2022 (1 year 7 months)

Provided product-expert support for OCI Database Cloud products, including Autonomous Database and Gen 2 Bare Metal/VM PaaS. Used Oracle ZDM and MV2ADB for migrations and recommended GoldenGate-based strategies.

OCI Autonomous Databases ZDM MV2ADB Oracle GoldenGate Patching Upgrades Standby Configuration Oracle RMAN Performance Optimization

Shift Manager

Datavail India Pvt. Ltd.

Jul 2014 - Aug 2020 (6 years 1 month)

Managed support for 50+ customers and thousands of databases, implementing end-to-end solutions on OCI. Configured Oracle GoldenGate, managed OCI networking and resources, and provided L3 support including RAC/Data Guard/OEM administration and RMAN cloning.

Oracle OCI Goldengate VCN Compute Storage RAC Dataguard OEM Oracle RMAN OPatch Patching Upgrades

Senior Oracle Database Administrator

Tech Mahindra Ltd.

Nov 2010 - Jul 2014 (3 years 8 months)

Installed, upgraded, and maintained Oracle databases across multiple platforms. Implemented Data Guard, analyzed AWR reports, and applied patches across RAC and non-RAC environments.

Oracle Dataguard AWR RAC Patching Performance Optimization

Oracle DBA

Harjai Computers Ltd.

Nov 2009 - Nov 2010 (1 year)

Managed over 100 Oracle database instances, performing server performance tuning, backup and recovery, and troubleshooting. Recovered block corruptions and performed periodic restorations using RMAN and tape backups.

Oracle Oracle RMAN Backup Recovery Performance Optimization Troubleshooting