Database Administrator (DBA)

Toss CareersSeoul

On-site Full-time

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Experience Level

Senior

Qualifications

- A minimum of 10 years of experience as a DBA, with particular expertise in MySQL (MariaDB). - Proven experience in managing large databases and SQL tuning capabilities. - Additional experience with MongoDB and PostgreSQL is preferred. - Proficiency in Python for operational automation is a strong advantage. - Familiarity with cloud environments would be beneficial.

About the job

Toss Careers is hiring a Database Administrator (DBA) in Seoul to join the Data Division's Data Platform Tribe. The DBA team manages and supports the core service databases, with MySQL and MongoDB as primary systems.

What You Will Do

Maintain a stable database environment through redundancy planning, performance monitoring, tuning, backup, and recovery.
Support development and operations by deploying physical database models and testing or applying new database features.
Design and implement automation strategies to reduce manual, repetitive work.

What We’re Looking For

At least 10 years of experience as a DBA, with deep expertise in MySQL (MariaDB).
Background in managing large-scale databases and strong skills in SQL tuning.
Experience with MongoDB operations is a plus.
Python scripting for automation is desirable.
Familiarity with PostgreSQL and cloud environments would be an advantage.

How to Strengthen Your Application

List specific, impactful projects from previous roles on your resume.
If you improved a service, include measurable results where possible (avoid sensitive external details).

Hiring Process

Application Submission
Job Interview
Cultural Fit Interview
Reference Check
Final Offer

About Toss Careers

Toss is a leading financial technology company in South Korea, committed to providing innovative solutions and services to enhance user experience in financial transactions and data management.

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