Application Operations & Maintenance Engineer (Application Support Engineer) São Paulo, Brazil (Cidade Monções) | Full-time | On-site Join Thunder Soft and support enterprise-level application systems in a fast-paced international environment. We are looking for experienced Application O&M Engineers who are passionate about system stability, troubleshooting, automation, and technical support. What You'll Do -Maintain and support daily operations of enterprise application systems -Monitor system performance and troubleshoot application/system issues -Support application deployment, upgrades, and environment maintenance -Perform system health checks and proactively identify risks -Collaborate with development teams on testing and production support -Maintain technical documentation, operation manuals, and system records -Provide technical support to internal teams and customers Requirements -3+ years of experience in Application Support / Operations / System Administration -Familiar with Linux/Windows server environments -Experience with monitoring tools such as Grafana, Prometheus, or Nagios -Knowledge of automation or scripting tools (Ansible / Shell / Python preferred) -Experience with database management (My SQL / Postgre SQL / Oracle, etc.) -Strong troubleshooting and problem-solving skills -Good communication and teamwork abilities -Fluent English communication skills Nice to Have -ITIL knowledge or related certifications -RHCE / MCSE / AWS / Azure certifications -Experience in multinational or large enterprise environments -Additional language skills such as Chinese, Spanish, Malay, German, or Arabic Why Join? -International working environment -Exposure to enterprise-scale systems and operations -Career growth and technical development opportunities -Collaborative global technical teams