System Engineer (API Infrastructure & Monitoring)

Describe Duties & Responsibilities (In Outline)

About the Role

As a System Engineer, you will be responsible for the stability of the infrastructure behind our MTS/HTS backend (API) services,
operated in an on-premise environment. Your core mission is to ensure our trading services stay healthy 24×365: watching API performance through monitoring and APM tools,
catching issues before customers notice them, responding quickly when incidents occur, and continuously improving our monitoring and operational automation.
This role is critical in a securities business where even short downtime or slow response during market hours has a direct impact on customers.

Responsibilities

• Operate and manage the infrastructure for MTS/HTS backend (API) services in an on-premise environment

• Operate API servers, web/WAS, and middleware, and manage their performance

• Operate, manage, and enhance the integrated monitoring system
    - Collect server/network/application (API) metrics and manage dashboards
    - Define and operate threshold-based alerting policies
    - Monitor API response time, throughput (TPS), and error rates via APM

• Operate log collection/analysis systems and perform root-cause analysis of incidents

• Handle incidents, establish preventive measures, and write incident reports

• Perform capacity planning and expansion planning; support performance testing

• Manage L4/L7 load balancer configurations and analyze traffic

• Apply OS/middleware patches; conduct security vulnerability checks and remediation

• Perform routine inspections, deployment support, and improve operational automation

• Support DR (disaster recovery) drills and backup/recovery operations

Requirements

• 5+ years of experience in system engineering

• Hands-on Linux server operations (kernel parameter tuning, resource analysis, etc.)

• Experience operating web/WAS (Nginx, Apache, etc.) and API servers

• Experience configuring and operating monitoring tools (Grafana, Prometheus, Zabbix, etc.)

• Experience with APM tools (Pinpoint, Scouter, Whatap, Jennifer, Datadog APM, etc.)

• Ability to automate operations using scripts (Shell, Python, etc.)

• Strong incident response and root-cause analysis skills (logs, resources, network path analysis)

Preferred Qualifications

• Experience operating on-premise infrastructure in the financial industry (securities, banking, etc.)

• Experience operating 24×365 customer-facing services such as MTS/HTS

• Experience operating infrastructure for Python-based (e.g., FastAPI) services

• Experience with log collection/analysis platforms (ELK, Loki, etc.)

• Understanding of network equipment such as L4/L7 switches and firewalls

• Experience operating middleware such as Redis and Kafka

• Experience operating under high-volume transaction loads (e.g., market-open peak traffic)

• Understanding of financial IT security requirements and OJK regulations on information technology for financial institutions

• Relevant certifications (RHCSA/RHCE, LPIC, CCNA, etc.) are a plus
  

Specialized Knowledge & Skills

• Linux/network-level troubleshooting, monitoring & APM-based performance analysis (metrics, alerting, TPS/response time), and incident root-cause analysis for 24×365 on-premise financial API services