Java Software Engineer

3 weeks ago

British Columbia, Canada IFG - International Financial Group Full time

Job Title: Java Performance Engineer Top IT Firm Location: Hybrid: Vancouver: 3 days per week Duration: 18 months Exclusive Role Overview: This is a specialized performance engineering role, not a general backend development position. The focus is on diagnosing inefficiencies in large-scale Java services and delivering actionable recommendations to optimize performance and reduce compute costs. The role sits at the intersection of Java internals, JVM tuning, infrastructure efficiency, and systems profiling. Key Responsibilities: 1. JVM & Application Performance Profiling Utilize tools such as Java Flight Recorder, JMC, async-profiler to analyze application performance. Identify issues related to high CPU/memory usage, GC inefficiencies, thread contention, logging overhead, and serialization patterns. 2. Service Behavior Analysis Evaluate DropWizard-based services for: Inefficient REST handling JSON/XML serialization/deserialization bottlenecks Excessive logging overhead Slow database/data-fetch patterns Poor concurrency models 3. Infrastructure Cost & Capacity Optimization Investigate why services require ~30,000 cores and propose strategies to scale down through: JVM parameter tuning Reducing garbage creation Improving I/O and network efficiency Refactoring bottleneck components 4. Provide Actionable Recommendations Focus on high-impact optimizations, not micro-tweaks: Remove expensive logging Reduce unnecessary serialization Optimize API payloads Improve connection pooling Reduce object churn Introduce caching where appropriate 5. Independent Ownership Drive the full profiling → diagnosis → recommendation pipeline with minimal supervision after onboarding. Qualifications & Background: Senior Java Engineer with deep JVM internals knowledge Experience as a Performance Engineer in high-scale systems Background in Platform/Infrastructure Engineering with Java specialization Java Architect with hands-on production debugging and tuning experience Core Skills: Strong expertise in Java performance tuning and JVM internals Proficiency with profiling tools (JFR, JMC, async-profiler) Knowledge of DropWizard, REST APIs, serialization frameworks Ability to analyze and optimize concurrency, GC, and memory usage Familiarity with cost optimization strategies for large-scale systems Please let me know if this is something you would love to do, and help me with your updated resume. Feel free to reach out at CAN / US if you have any questions. Thanks

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