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Apptoza Inc.

Senior Oracle Database Administrator

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Dec 3, 2026
Posting language: English
Posted: Nov 3, 2026

Original job description

Position: Senior Oracle DBA

Location: Toronto, ON (3 days hybrid)

Contract: Long term (12+ months)

Role Descriptions:

2.Analyze execution plans| perform SQL query tuning| and optimize index structures to eliminate bottlenecks in high-throughput transactional environments.

5.Partner with infrastructure and cloud teams to design| test| and execute on-premises to AWS cloud database migrations.

6.Participate in database capacity planning| failover drills| and disaster recovery design.

7.Support production deployment and other maintenance activities over weekend and after office hours on weekdays as needed.

Required Exp

1 - 8-10 years of experience in Oracle Database Administration 2.Oracle Application DBA Expertise 8 years specializing in Oracle Database (12c19c) application support| advanced PLSQL programming| execution plan analysis| and performance diagnostics (AWR| ASH| ADDM).

3.AWS Cloud Databases Practical experience administering managed database services including Amazon RDS (Oracle PostgreSQL) and Amazon Aurora.

4.PostgreSQL Hands-on working knowledge of PostgreSQL architecture| schema design| and performance optimization.

5.Cloud Migration Experience Strong| proven track record of migrating on-premises databases to AWS environments (using tools such as AWS DMS| SCT| or native utilities).

6.Collaboration Release Management Solid background in CICD integration for database deployments and working alongside Agile engineering teams.

7.Ability to work with offshore teams for maintenance and production support activities

NICE TO HAVE skills

Experience with Oracle Exadata administration and performance tuning features (Smart Scan| Hybrid Columnar Compression).Proficiency in shell scripting (Bash) and automation using Python.Relevant AWS (e.g.| AWS Certified Database Specialty) or Oracle certifications

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More about this job

Responsibilities

Collaborate with application development teams on database design, PL/SQL development, performance tuning, release automation, and schema migrations across environments. Monitor production database health, support AWS migrations, and contribute to capacity planning, failover, disaster recovery, and after-hours maintenance.

Requirements

Requires 8–10 years of Oracle Database Administration experience, including Oracle 12c/19c application support, advanced PL/SQL, and performance diagnostics using AWR, ASH, and ADDM. Candidates should also have practical AWS managed database and PostgreSQL experience, proven on-premises-to-AWS migration experience, CI/CD and release management experience, and the ability to collaborate with offshore teams.

Skills

Oracle Database Administration
Oracle Application DBA
PL/SQL Programming
SQL Query Tuning
Execution Plan Analysis
Performance Diagnostics
Amazon RDS
Amazon Aurora
PostgreSQL
AWS Database Migration
AWS DMS
AWS Schema Conversion Tool
CI/CD
Database Release Management
Disaster Recovery
Shell Scripting

Visa sponsorship

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Keywords

Oracle Database
Oracle 12c
Oracle 19c
Oracle Application DBA
PL/SQL
SQL Query Tuning
Execution Plans
AWR
ASH
ADDM
Amazon RDS
Amazon Aurora
PostgreSQL
AWS
AWS DMS
AWS Schema Conversion Tool
CI/CD
Database Release Automation
Schema Migration
Data Modeling
Schema Design
Database Performance Optimization
Capacity Planning
Failover
Disaster Recovery
Oracle Exadata
Smart Scan
Hybrid Columnar Compression
Bash

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