Reflections Info Systems - Senior Performance Engineer - Linux/Java

• 8 + years of overall IT experience, with significant experience in Performance Engineering - Application Performance Management.
• Proven experience troubleshooting complex performance issues in enterprise applications.
• Strong understanding of JVM internals, memory management, threading, GC, CPU and I/O behavior.
• Strong Linux troubleshooting skills.
• Ability to independently perform performance analysis and identify root causes rather than only execute predefined performance test scripts.
• Experience working with development, DevOps, infrastructure, and database teams.

Responsibilities Include

• Lead end-to-end application performance engineering and troubleshooting activities.
• Analyze application and server performance issues across development, test, and production environments.
• Perform detailed Linux system-level performance analysis, including CPU, memory, disk I/O, network, processes, and system resource utilization.
• Analyze JVM heap dumps to identify memory leaks, excessive object creation, and memory-related bottlenecks.
• Analyze thread dumps to identify deadlocks, thread contention, blocked/waiting threads, thread pool issues, and CPU-consuming threads.
• Perform Garbage Collection (GC) analysis, including GC logs, pause times, heap utilization, allocation patterns, and JVM tuning opportunities.
• Conduct database performance analysis, including slow queries, execution plans, connection pools, locks, waits, indexing, and database resource utilization.
• Generate and analyze flame graphs for identifying CPU hotspots and application-level performance bottlenecks.
• Use application and server-side monitoring/observability tools to identify performance degradation and correlate application, infrastructure, and database metrics.
• Conduct root-cause analysis of performance incidents and provide actionable recommendations.
• Work with development teams to identify inefficient code paths, resource utilization issues, memory problems, and concurrency-related bottlenecks.
• Define performance baselines and monitor application performance against agreed SLAs/SLOs.
• Lead performance optimization initiatives and validate improvements through benchmarking and load testing.
• Prepare technical performance reports, bottleneck analysis, and optimization recommendations.
• Mentor junior performance engineers and provide technical leadership across performance engineering initiatives.

Primary Skills Candidates must have strong hands-on experience with :

• Linux - system-level troubleshooting and performance analysis
• Heap Dump Analysis
• Thread Dump Analysis
• Garbage Collection / GC Analysis
• Database Performance Analysis
• Flame Graphs
• Application-side Monitoring
• Server-side Monitoring
• JVM performance troubleshooting and tuning
• Application performance bottleneck identification
• Root-cause analysis and performance optimization

Secondary Skills

• Java/JVM performance engineering
• JProfiler, VisualVM, Eclipse MAT, YourKit or similar profiling tools
• Dynatrace, AppDynamics, New Relic, Datadog, Grafana, Prometheus or similar observability platforms
• Splunk or ELK for log analysis
• APM and distributed tracing
• Kubernetes/container performance monitoring
• SQL performance tuning
• Load/performance testing tools such as JMeter, LoadRunner, Gatling or similar
• CI/CD performance monitoring and engineering
• Cloud environments such as AWS, Azure or GCP

(ref:hirist.tech)