Senior DevOps Engineer

About

Liquid Group is a FinTech payments services group based in Singapore. Liquid empowers and connects businesses and individuals to make transactions in a smart, secure, and cost-effective way, anywhere in the world.

We operate a regional payment network that enables cross-border QR payment services for e-wallet operators, banks, and merchants. We also provide white-label solutions to accelerate the development and adoption of mobile payments for our business partners.

We work collaboratively and adaptively, exploring innovative ideas and solving challenging problems to develop our products. Together, we ensure efficiency, security, and convenience for our partners and customers.

Role Overview

We are looking for a Senior Cloud Engineer with strong AWS infrastructure experience and hands-on database expertise in Oracle and PostgreSQL.

This role will be responsible for managing and supporting our AWS cloud infrastructure, Linux and Windows server environments, and AWS RDS databases. The candidate should be comfortable owning infrastructure operations, server patching and upgrades, database performance and maintenance, production incidents, and reliability improvements.

This is a hands-on role requiring strong experience across AWS Cloud, Linux and Windows administration, AWS RDS Oracle and PostgreSQL, automation, security, and production operations.

Key Responsibilities

AWS Cloud Infrastructure

• Manage, support, and optimise AWS cloud infrastructure across production and non-production environments.
• Support AWS services, including EC2, ECS/EKS, RDS, VPC, IAM, Load Balancers, S3, CloudWatch, Route 53, and related services.
• Monitor infrastructure availability, performance, capacity, and security.
• Troubleshoot infrastructure issues and participate in production incident resolution.
• Implement cloud infrastructure changes following proper change management processes.
• Support High Availability, Disaster Recovery, backup, and business continuity requirements.
• Identify opportunities for performance optimisation, automation, and AWS cost optimisation.

Linux and Windows Server Administration

• Manage Linux and Windows server environments hosted on AWS.
• Own regular OS patching, security patching, vulnerability remediation, and server upgrades.
• Perform operating system version upgrades and server lifecycle management.
• Implement server hardening based on security standards and audit requirements.
• Monitor server CPU, memory, disk, filesystem, services, and system performance.
• Troubleshoot OS, network, application connectivity, and performance-related issues.
• Maintain patching schedules, compliance status, and remediation tracking.

AWS RDS Database Administration

• Manage and support AWS RDS Oracle and PostgreSQL database environments.
• Monitor database health, availability, capacity, sessions, connections, storage, CPU, memory, and query performance.
• Perform database performance tuning and troubleshooting.
• Analyse slow queries, execution plans, locks, sessions, indexes, and database performance bottlenecks.
• Manage RDS parameter groups, option groups, maintenance windows, and database configurations.
• Plan and execute Oracle and PostgreSQL engine upgrades and patching.
• Manage database backups, snapshots, point-in-time recovery, and restore testing.
• Support Multi-AZ, High Availability, replication, and Disaster Recovery requirements.
• Perform database capacity planning and storage monitoring.
• Support database security, access controls, encryption, and audit requirements.
• Work with application teams on database optimisation and production issues.

Automation and DevOps

• Automate repetitive infrastructure and operational activities.
• Develop and maintain Infrastructure as Code using tools such as Terraform and CloudFormation.
• Use automation tools such as Ansible, Python, Shell, or PowerShell.
• Automate server patching, monitoring, compliance reporting, and operational activities where possible.
• Support CI/CD and infrastructure deployment processes.

Monitoring and Production Operations

• Support 24/7 production environments and participate in on-call support where required.
• Monitor infrastructure and database alerts and proactively resolve issues.
• Participate in incident management, root cause analysis, and problem management.
• Prepare root cause analysis (RCA) reports and implement preventive actions following production incidents.
• Work closely with DevOps, SRE, Security, Application, and Database teams.
• Maintain infrastructure documentation, operational procedures, patching records, and runbooks.

Required Experience

• At least 7 years of experience in Cloud, Infrastructure, DevOps, Systems Engineering, or related roles.
• Strong hands-on experience with AWS cloud infrastructure.
• Strong Linux administration experience.
• Good hands-on Windows Server administration experience.
• Strong experience managing server patching, OS upgrades, security remediation, and vulnerability management.
• Strong hands-on experience supporting AWS RDS Oracle and PostgreSQL.
• Experience with Oracle and PostgreSQL performance troubleshooting and tuning.
• Experience with RDS backup, restore, snapshots, Multi-AZ, maintenance, and engine upgrades.
• Good understanding of database indexing, SQL performance, locks, sessions, and execution plans.
• Experience with Terraform or other Infrastructure as Code (IaC) tools.
• Experience with scripting and automation using Python, Shell, PowerShell, or Ansible.
• Strong troubleshooting skills across infrastructure, operating systems, networking, and databases.
• Experience supporting business-critical production environments.

Preferred Experience

• AWS certifications, such as AWS Certified Solutions Architect, AWS Certified SysOps Administrator, or AWS Certified DevOps Engineer.
• Oracle or PostgreSQL database certification.
• Experience with container platforms such as ECS, EKS, or Kubernetes.
• Experience with monitoring platforms such as New Relic, CloudWatch, Grafana, or similar tools.
• Experience working in highly regulated environments such as financial services, banking, or fintech.

Key Skills

AWS | Linux | Windows Server | AWS RDS | Oracle | PostgreSQL | Server Patching | OS Upgrades | Database Performance Tuning | Backup and Recovery | Disaster Recovery | Terraform | Ansible | Python | Shell | PowerShell | Monitoring | Production Support | Incident Management | Security Hardening

Skills

RDS, Maintenance Management, Patching of Databases, Database Tuning, High Availability, Microsoft Windows Server Administration, Market Planning, Patch Management, Processing queries, Oracle RDB, Replication, Cloud Infrastructure, Linux Administration, Connection Diagrams, Oracle Database Administration, database backups