Performance Tester with Java Exp-2

REALIGN LLC; St. Louis (MO); On-site; USD 110,000 - 140,000; Full time

Job summary

REALIGN LLC in St. Louis, MO is seeking a Performance Tester with Java experience to design and drive performance testing across distributed services, defining SLOs and latency targets.

You will implement tracing with Dynatrace, AWS X-Ray, and related tools, analyze heap/thread dumps, and lead root-cause analysis of incidents in production and pre-production. The role requires deep knowledge of Java, Spring Boot, and cloud-based architectures, with hands-on performance modeling across AWS, PCF,

Qualifications

• Experience defining SLOs, performance budgets, and latency targets across services.
• Proficient in Java performance tuning and JVM internals.
• Experience with distributed tracing and performance analysis tools (Dynatrace, AWS X‑Ray).

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 (heap/thread dumps, flame graphs, GC logs, network traces).
• Review service and system architectures for performance risks (synchronous hops, dependencies, pool misconfigurations).
• Conduct and lead root-cause analysis for performance incidents in production and pre-production environments.
• Develop capacity models and performance baselines for services across cloud environments.

Skills

Java

Performance testing

Distributed tracing

Tools

Dynatrace

AWS X-Ray

PCF

Kubernetes

Docker

Nginx

Job description

Role

Performance Tester with Java Exp

Location

St. Louis, MO (On-site)

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

Job Type

Full Time

Job Category

IT