Performance Tester with Java Exp-4

St. Louis, Missouri 63101 Posted October 1st, 2026 Job Type: Full Time Job Category: IT Job Description Role – Performance Tester with Java Exp Location – St. Louis, MO (On-site) FTE Key Responsibilities: • Define service-level objectives (SLOs), performance budgets, and latency/throughput targets across services. • Architect and champion comprehensive distributed tracing strategies (Dynatrace, AWS X-Ray, etc.). • Analyse application, platform, and cloud behaviour using deep-dive techniques such as heap dumps, thread dumps, flame graphs, GC logs, network traces, and storage I/O profiling. • Review service and system architectures for performance risks (e.g., synchronous hops, excessive dependencies, misconfigured connection pools, poor cache placement). • Conduct and lead root-cause analysis for performance incidents in production and pre-production environments. • Develop capacity models and performance baselines for services running across cloud environments. Areas of Expertise • Application Layer: Spring Boot internals, JVM tuning, thread/heap management, concurrency debugging, GC optimization • Container Runtime: PCF, Docker, container resource limits, CPU throttling, memory pressure • Orchestrators: PCF, Kubernetes, ECS (autoscaling, pod health, scheduling issues) • Networking: Service-to-service hops, TLS overhead, DNS, routing, load balancer configs (F5, Nginx, ALB/NLB), service mesh performance • Storage: Latency, IOPS constraints, distributed file system behaviour • Caching & Middleware: Redis, Hazelcast, NATS, Kafka, RabbitMQ configuration and throughput tuning • Databases: Connection pool tuning, slow queries, indexing, replication lag • Cloud Layer: AWS compute/storage/network performance, regional latency, cross-cloud traffic patterns Required Skills JAVA Developer