Java Performance Tester

Vish Consulting IT; St. Louis (MO); Hybrid; USD 90,000 - 140,000; Full time

Job summary

Vish Consulting Services, Inc is recruiting a Java Performance Tester for a hybrid St. Louis, MO role.

The specialist will define SLOs, budgets, and latency targets, architect scalable tracing strategies, and analyze JVM-wide issues to improve performance across cloud services. Responsibilities include leading root-cause analysis for performance incidents in production and pre-production, building capacity models, and tuning JVM/GC, with emphasis on distributed systems and containerized

Qualifications

• Experience profiling and tuning Java applications for performance
• Ability to define SLOs, budgets, and latency/throughput targets
• Experience with distributed tracing tools across cloud services
• Strong diagnostic skills for production incidents and baselines

Responsibilities

• Define SLOs, performance budgets, and latency/throughput targets across services.
• Architect and champion distributed tracing strategies (Dynatrace, AWS X-Ray, etc.).
• Analyze app, platform, and cloud behavior using heap/thread dumps, flame graphs, GC logs, network traces.
• Review architectures for performance risks such as poor cache placement and excessive dependencies.
• Lead root-cause analysis for performance incidents in prod and pre-prod.
• Develop capacity models and performance baselines for services across clouds.

Skills

JVM tuning

Concurrency debugging

GC optimization

Spring Boot

Distributed tracing

Tools

PCF

Docker

Kubernetes

ECS

Dynatrace

AWS X-Ray

Nginx

ALB/NLB

F5

Job description

Job Title- Java Performance Tester

Location- St, Louis, MO (Hybrid)

Full-time (Permanent role)

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

Thanks & Regards,
Vivek Sharma
Account Manager
Email: [e-mail]
Vish Consulting Services, Inc
www.vishusa.com