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RK

Rajesh Kumar

Oracle Database Administrator · RAC, ASM, RMAN, and Performance Tuning

Uttam Nagar, New Delhi, India

@rajesh_kumar1

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About

Oracle Database Administrator with 3+ years of hands-on experience in Oracle 12c/19c environments, specializing in RAC, ASM, backup and recovery, performance tuning, security management, and patching. Currently supporting a mission-critical IRCTC production environment at ITwings Infosystem Pvt. Ltd.

Experience

  • Oracle Database Administrator
    ITwings Infosystem Pvt. Ltd.
    Mar 2023 – Present

    Worked on IRCTC project supporting Oracle 12c/19c standalone and 2-node RAC environments, with responsibilities in RAC deployment, database migration and cloning, backup and recovery, performance tuning, patch management, ASM administration, GoldenGate replication, security management, and task automation.

Education

  • B.Tech
    Dr. A.P.J. Abdul Kalam Technical University
    Electronics · 2018 – 2022
  • Intermediate
    Dhanraj Singh Inter College, Sikandar
    2014 – 2016
  • Secondary
    S.K.V., Sikandar
    2013 – 2014

Skills

2 to 5 years 2 to 5 years Several years of experience.
Automation Oracle RAC Replication Performance Tuning Database migration Security Management Backup and Disaster Recovery
<3 months <3 months Just getting started - under three months. This is also what shows when a level has not been set.
SQL Java PL/SQL Shell Scripting Oracle Database Administration

Tools / apps / platforms

2 to 5 years 2 to 5 years Several years of experience.
Linux Oracle
<3 months <3 months Just getting started - under three months. This is also what shows when a level has not been set.
Microsoft Windows

Projects

  • GoldenGate Replication Setup
    Oracle GoldenGate

    Configured Oracle GoldenGate for real-time data replication to support high availability requirements.

  • Patch Management
    RU, RUR, GI RU, OPatch, opatchauto, datapatch

    Applied Release Updates and interim patches across Oracle 12c and 19c RAC environments with rolling patching and post-patch data dictionary updates.

  • Oracle Database Upgrades
    Oracle 12c, Oracle 19c

    Executed end-to-end database upgrades with minimal downtime, data integrity, and post-upgrade optimisation.

  • Database Migration – Standalone to RAC
    RMAN, Data Pump

    Migrated and cloned databases from non-RAC to RAC environments with zero data loss.

  • Oracle RAC Installation & Configuration
    Oracle 12c, Oracle 19c, RAC

    Installed and configured 2-node Oracle RAC clusters for high availability, scalability, and failover support.

🏆 Achievements & awards

  • HackerRank 4-Star in Java

    Achieved a 4-star rating in Java on HackerRank.

  • 100+ Problems Solved on GeeksForGeeks and LeetCode

    Solved more than 100 problems on GeeksForGeeks and LeetCode.

🎯 Hobbies & interests

  • Chess
  • continuous learning

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