Job Responsibilities

1. Infrastructure and Server Operations (Core Responsibilities)

• Design, deploy, and optimize the company’s server clusters (OCI / AWS).
• Manage Linux servers, system environments, user permissions, SSH keys, SFTP, firewalls, and security groups.
• Oversee Nginx, SSL, reverse proxy, domain names, and certificate management to ensure high availability and security.
• Maintain virtual machines, load balancers, object storage, VPC/VCN networks, subnets, and security group policies.
• Troubleshoot production environment issues such as port conflicts, permission errors, service startup failures, full disks, and network anomalies.

2. CI/CD and Deployment Management

• Design, build, and maintain CI/CD pipelines (GitHub Actions / GitLab CI / Jenkins).
• Write and maintain deployment scripts, automated build scripts, environment variable management, and release workflows.
• Define deployment strategies, rollback plans, and blue-green/canary release processes for test, UAT, and production environments.
• Collaborate with development teams on routine releases, emergency hotfixes, and configuration management.

3. System Reliability and Availability (SRE Focus)

• Establish application monitoring systems (Prometheus, Grafana, ELK, CloudWatch).
• Implement alerting for CPU, memory, disk usage, service anomalies, and API errors.
• Define and enforce SLAs, SLOs, and SLIs to improve system reliability.
• Conduct regular capacity planning, performance optimization, and stress testing.

4. Security and Access Management

• Manage server accounts, cloud platform credentials, Git repository permissions, and Jira/Wiki access.
• Deploy and maintain bastion hosts (Jump Server/Bastion) following the principle of least privilege.
• Develop security baseline policies and perform regular patching, vulnerability scans, and security audits.
• Collaborate with security and risk teams to address incidents such as brute-force attacks, abnormal traffic, and service vulnerabilities.

5. Database and Middleware Maintenance

• Maintain deployments, backups, and master-slave configurations for MySQL, PostgreSQL, Redis, and Kafka.
• Perform database performance tuning, slow query analysis, and connection pool optimization.
• Implement backup strategies, automate backups, ensure disaster recovery, and conduct periodic restore drills.

6. Documentation and Asset Management

• Maintain inventories of servers, domain certificates, and permission lists.
• Create and update operations documentation, including deployment guides, release procedures, security policies, and architecture diagrams.
• Manage operations assets such as server specifications, monitoring dashboards, keys, environment configurations, and network topology diagrams.

7. Team and Process Development

• Oversee daily management and development of the operations team.
• Drive implementation of production change management processes, release policies, access control policies, and disaster recovery procedures.
• Coordinate cross-functionally with development, backend, DBAs, and security teams to resolve critical incidents.

Qualifications

• Expert in Linux system administration, shell scripting, and network fundamentals (Layer 3/4/7).
• Experience with cloud platform operations (OCI / AWS).
• Strong knowledge of Nginx, SSL, reverse proxy, Keepalived, and load balancing.
• Familiarity with Docker/Kubernetes (proficiency in Docker and Compose required).
• Experience with CI/CD pipelines (GitHub Actions / GitLab CI / Jenkins).
• Proficient in MySQL fundamentals, replication, backup and recovery, and performance tuning.
• Familiar with at least one middleware such as Redis, Kafka, or RabbitMQ.
• Experience building monitoring systems (Prometheus / Grafana / ELK / Loki).

Preferred Qualifications

• Strong logical thinking and rapid troubleshooting skills, capable of handling production incidents independently.
• Comprehensive operations mindset covering monitoring, alerting, security, access, and process management.
• Excellent documentation skills, able to maintain asset inventories, network topologies, and process documentation.
• Strong communication and cross-team collaboration abilities.
• Experience in finance, exchanges, or blockchain industry operations.
• Familiarity with high-concurrency, high-availability architecture design.