Posted Oct 12, 2026

Remote - Lead / Senior Test & Resiliency Engineer

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Lead / Senior Test & Resiliency Engineer Location: St. Louis, MO – Hybrid preferred; remote allowed for the right candidate Employment: W2 Only Work Authorization: USC, GC, and H-1B Transfer candidates accepted. No OPT/CPT. We are seeking experienced Lead / Senior Test & Resiliency Engineers to define and execute the validation strategy for functional behavior, transaction integrity, performance, failover, recovery, monitoring, and production readiness. Required Skills •⁠ ⁠Resiliency, performance, network, and integration testing •⁠ ⁠TCP/IP and packet-level troubleshooting •⁠ ⁠Automated testing frameworks and failure-injection techniques •⁠ ⁠Load, soak, capacity, regression, failover, and recovery testing •⁠ ⁠Validation of persistent TCP connections during maintenance/failure scenarios •⁠ ⁠Verification of message loss, duplication, ordering, and customer-impact scenarios •⁠ ⁠Logs and packet-capture analysis and root-cause investigation •⁠ ⁠Strong defect analysis, test evidence, certification, and technical documentation Preferred •⁠ ⁠Financial messaging, ISO 8583, payment switching, telecom, or other high-availability transaction platforms •⁠ ⁠Proxy, load-balancer, network-service, or active-active failover testing #Hiring #NowHiring #StLouisJobs #StLouisTech #HybridJobs #RemoteJobs #W2Jobs #SoftwareEngineering #SeniorSoftwareEngineer #Golang #GoDeveloper #NetworkEngineering #NetworkSystemsEngineer #Linux #TCPIP #NetworkSecurity #HighAvailability #DistributedSystems #ResiliencyEngineering #PerformanceTesting #NetworkTesting #DevOps #SRE #FinancialTechnology #FinTechJobs #TechJobs