Application Operations & Maintenance Engineer (Application Support Engineer)São Paulo, Brazil (Cidade Monções) | Full-time | On-siteJoin ThunderSoft 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 DoMaintain and support daily operations of enterprise application systemsMonitor system performance and troubleshoot application/system issuesSupport application deployment, upgrades, and environment maintenancePerform system health checks and proactively identify risksCollaborate with development teams on testing and production supportMaintain technical documentation, operation manuals, and system recordsProvide technical support to internal teams and customersRequirements3+ years of experience in Application Support / Operations / System AdministrationFamiliar with Linux/Windows server environmentsExperience with monitoring tools such as Grafana, Prometheus, or NagiosKnowledge of automation or scripting tools (Ansible / Shell / Python preferred)Experience with database management (MySQL / PostgreSQL / Oracle, etc.)Strong troubleshooting and problem-solving skillsGood communication and teamwork abilitiesFluent English communication skillsNice to HaveITIL knowledge or related certificationsRHCE / MCSE / AWS / Azure certificationsExperience in multinational or large enterprise environmentsAdditional language skills such as Chinese, Spanish, Malay, German, or ArabicWhy Join?International working environmentExposure to enterprise-scale systems and operationsCareer growth and technical development opportunitiesCollaborative global technical teams