Database Engineer (DBA / MongoDB)

SCIENTEC CONSULTING PTE. LTD.

Singapore

On-site

SGD 72,000 - 90,000

Full time

3 days ago

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Benefits offered by this job

AWS

Job summary

SCIENTEC CONSULTING PTE. LTD. is seeking an experienced Database Administrator (DBA) with strong hands-on MongoDB administration and performance tuning.

You will ensure reliable, secure, highly available databases supporting critical applications from development through production. This on-site role in Singapore offers a robust salary package and opportunities to optimize queries, indexes and configurations for peak performance.

Qualifications

Bachelor degree in Computer Science, IT, Engineering or related field.
Strong hands-on MongoDB administration experience.
Experience with HA, replica sets and sharding.
Experience with performance monitoring and query optimization.
Proficiency in Linux/Unix environments.
Scripting experience with Python or Bash is a plus.
Experience with cloud DB environments (AWS, Azure, GCP) is a plus.

Responsibilities

Administer, configure, maintain and support MongoDB databases across development, testing and production environments.
Monitor database health, availability, capacity and performance to ensure stable operations.
Perform database performance tuning, identifying and resolving performance bottlenecks, slow queries and resource constraints.
Analyse and optimise queries, indexes, execution behaviour and database configurations to improve performance.
Configure and manage MongoDB Replica Sets and sharded environments for HA and scalability.
Install, upgrade, patch, and migrate databases.
Develop and maintain backup, restore and disaster recovery procedures.
Troubleshoot incidents, outages, replication issues and performance degradation.
Conduct health checks and capacity planning to support future growth.
Implement and maintain database security, authentication and access controls.
Support releases and DB changes with minimal production impact.
Automate routine DBA tasks and monitoring.
Collaborate with developers, infra, cloud and DevOps teams.
Maintain runbooks and technical documentation.
Provide production support and standby/on-call when required.

Skills

MongoDB administration

Performance tuning

Query optimization

Replica Sets

Sharding

Linux/Unix

Python scripting

Bash scripting

Cloud platforms (AWS)

Cloud platforms (Azure)

Cloud platforms (GCP)

Monitoring tools

Education

Bachelor’s degree in Computer Science / IT / Engineering

Tools

MongoDB Atlas

Ops Manager

Monitoring tools

Job description

We are looking for an experienced Database Administrator (DBA) with strong hands-on expertise in MongoDB administration and database performance tuning. The successful candidate will be responsible for maintaining reliable, secure, highly available and high-performing database environments supporting business-critical applications.

Working Hours: Mon-Fri
Working Location: Central (on-site)
Salary Package: Up to $7,500 (basic) + AWS +VB

Key Responsibilities

Administer, configure, maintain and support MongoDB databases across development, testing and production environments.
Monitor database health, availability, capacity and performance to ensure stable operations.
Perform database performance tuning, identifying and resolving performance bottlenecks, slow queries and resource constraints.
Analyse and optimise queries, indexes, execution behaviour and database configurations to improve application and database performance.
Configure and manage MongoDB Replica Sets and sharded environments to support high availability and scalability.
Perform database installation, configuration, upgrades, patching and migrations.
Develop and maintain appropriate backup, restore and disaster recovery (DR) procedures.
Troubleshoot database incidents, outages, replication issues and performance degradation, including root cause analysis and preventive actions.
Conduct regular database health checks and capacity planning to support future growth.
Implement and maintain database security, authentication, authorisation and access controls.
Support application releases, deployments and database changes while minimising production impact.
Automate routine database administration and monitoring activities using scripting where applicable.
Work closely with application developers, infrastructure, cloud and DevOps teams to troubleshoot issues and improve database performance.
Maintain database configurations, operational procedures, technical documentation and support runbooks.
Provide production support and participate in standby/on-call support where required.

Requirements

Bachelor Degree in Computer Science, Information Technology, Engineering or a related discipline.
Relevant experience in Database Administration, preferably supporting enterprise or production environments.
Strong hands-on experience with MongoDB administration.
Good understanding of MongoDB architecture, Replica Sets, sharding, indexing and replication.
Strong experience in database performance monitoring, troubleshooting and performance tuning.
Experience analysing and optimising slow queries, indexing strategies and database resource utilisation.
Knowledge of High Availability (HA), backup/recovery and Disaster Recovery (DR) concepts.
Experience with database upgrades, patching and migration activities.
Good knowledge of Linux/Unix environments.
Scripting or automation experience using Python, Bash/Shell or equivalent would be advantageous.
Exposure to cloud database environments such as AWS, Azure or GCP would be advantageous.
Experience with MongoDB Atlas, Ops Manager or database monitoring tools would be an advantage.
Exposure to other relational or NoSQL databases such as PostgreSQL, MySQL, Microsoft SQL Server, Oracle, Redis or Cassandra would be beneficial.
Strong troubleshooting, analytical and problem-solving skills.
Ability to work independently and collaborate effectively with cross-functional technical teams.