markham, on database administrator Jobs – 54 Openings This Week

Senior PostgreSQL System Administrator
Galent —Toronto, ON
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Member Services Representative
Birchmount Bluffs Neighbourhood Centre —Scarborough, ON
- $19 an hour
- Full-time
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Member Services Representative
Birchmount Bluffs Neighbourhood Centre —Scarborough, ON
Do you have experience answering phone calls, responding to emails, or assisting clients and visitors in a professional setting?
$19 an hour
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Senior PostgreSQL System Administrator

Galent
Toronto, ON

Quick apply

Job details

Contract

Qualifications

Azure
Oracle
Computer Science
Kubernetes
Ansible
DevOps
Engineering
Encryption
UNIX
NoSQL
Google Cloud Platform
MongoDB
Bash (Unix shell)
Databases
SQL
Database administration
AWS
Analysis skills
Docker
Bachelor's
PostgreSQL
Terraform
Scripting
Linux
RDS
Communication skills
Python
Shell Scripting
MySQL
High availability

Full job description

Job Summary

We are looking for an experienced Senior PostgreSQL System Administrator with 5–7 years of hands-on experience managing large-scale, mission-critical PostgreSQL environments. This role is ideal for someone who thrives in performance tuning, high availability design, and database security, and who enjoys mentoring junior DBAs while influencing architectural decisions.

Key Responsibilities

Lead installation, configuration, and administration of PostgreSQL databases across production and non-production environments
Design and implement High Availability (HA), Disaster Recovery (DR), and replication solutions
Monitor database performance, identify bottlenecks, and optimize queries and configurations
Perform database upgrades, patching, and migrations with minimal downtime
Implement and manage backup and recovery strategies (pgBackRest, Barman, etc.)
Ensure database security through access control, auditing, and encryption
Automate routine DBA tasks using Shell scripting, Ansible, or similar tools
Collaborate with Development, Infrastructure, and DevOps teams on scalable architectures
Create and maintain documentation, standards, and best practices
Mentor junior DBAs and act as a PostgreSQL Subject Matter Expert
Participate in on-call rotation and resolve critical incidents

Required Skills & Qualifications

Bachelor’s degree in Computer Science, Engineering, or related field
5–7 years of PostgreSQL DBA experience (MongoDB exposure required)
Strong knowledge of PostgreSQL internals and architecture
Experience with PostgreSQL v14
Expertise in streaming/logical replication and clustering
Advanced performance tuning, query optimization, and indexing strategies
Strong Linux/Unix skills with scripting (Bash, Python preferred)
Experience with monitoring tools such as Prometheus, Grafana, or Zabbix
Experience managing PostgreSQL on cloud platforms (AWS RDS, GCP Cloud SQL, Azure

Preferred / Nice to Have

Experience with Docker and Kubernetes
Knowledge of other databases (MySQL, Oracle, NoSQL)
Exposure to CI/CD pipelines and DevOps practices
Infrastructure as Code experience (Ansible, Terraform)

Soft Skills

Excellent analytical and troubleshooting skills
Strong communication and documentation abilities
Leadership and mentoring mindset
Proactive, automation-driven approach to problem solving

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Senior PostgreSQL System Administrator

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Member Services Representative

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