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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Performance Engineer - **Company:** Eliassen Group - **Location:** Jersey City, NJ, United States - **Experience:** Expert - **Salary:** $141,440.0 - $151,840.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Algorithmic Trading, Amazon Web Services, Automation of Tests, Microsoft Azure, Cloud Computing, Software Debugging, DevOps, Distributed Systems, Java Virtual Machine (JVM), Memory Leaks, Web Applications, Datadog, Performance Testing, Spring-boot, Information Technology, Appdynamics, Dynatrace, Microservices - **Published:** September 24, 2026 - **Apply:** https://www.juju.com/job/15_03359f873 ## About the Role Due to client requirements, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance., * 6+ years of performance engineering with hands-on test development. * Strong performance testing across low-latency, high-throughput, high-volume services. Trading services experience preferred. * Expertise in Java and core Java technologies with Spring Boot services. * Experience with distributed systems, asynchronous workers, and microservice architecture. * Cloud familiarity with AWS, Azure, or GCP and containerized, orchestrated environments. * Deep understanding of performance-critical software and hardware interactions at scale. * JVM internals and tuning expertise with actionable recommendations. * Proficiency with Dynatrace, Datadog, or AppDynamics; thread and heap dump analysis. * Proven ability to identify memory leaks, connection issues, and throughput bottlenecks across web apps, infrastructure, and cloud. * Experience architecting large-scale test automation. * Strong communication and influence skills with senior engineering and product leaders. * Track record leading cross-team performance initiatives and decisions. * Collaborative mindset with mentoring and productivity focus. * Nice to have: capital markets or cryptocurrency experience in trading, algo trading, and market data. * Nice to have: kernel bypass such as Solarflare OpenOnload. * Nice to have: low-latency messaging products such as Aeron, Solace, or 29West., * Bachelor's degree in computer science or related field. ## Description * Design, develop, and perform performance tests across services and platforms. * Build custom Java-based performance test harnesses to simulate trading workflows, market data ingestion, order routing, and exchange connectivity. * Develop benchmarking frameworks and production-like simulators for micro and macro latency measurement. * Create and run load, stress, endurance, duration, spike, soak, volume, and capacity test scenarios. * Validate and sign off on production readiness for stability and performance across applications and infrastructure. * Connect performance outcomes to business objectives and SLOs, guiding teams to keep the stack scalable and efficient. * Lead architecture and development of profiling and instrumentation for CPU, memory, hot paths, utilization, and deployment events. * Partner with DevOps and back-end engineering to ensure optimal service utilization. * Debug distributed and low-level system boundaries using logs, metrics, tracing, and performance tooling. * Ramp up on new technologies and unfamiliar parts of the stack. ## Related Videos - [Frontend Performance Testing in practice](https://www.wearedevelopers.com/videos/8-frontend-performance-testing-in-practice) - [The Power of Purpose: Unlocking Potential and Innovation](https://www.wearedevelopers.com/videos/1110-the-power-of-purpose-unlocking-potential-and-innovation) - [Shifting Stress to Progress— Understanding DevOps to do DevOps Better](https://www.wearedevelopers.com/videos/268-shifting-stress-to-progress-understanding-devops-to-do-devops-better) - [The Memory Leak That Ate Our Cluster: A Postmortem](https://www.wearedevelopers.com/videos/2057-the-memory-leak-that-ate-our-cluster-a-postmortem) - [Measure and improve frontend performance by using test automation](https://www.wearedevelopers.com/videos/719-measure-and-improve-frontend-performance-by-using-test-automation) - [It's Not Vibe Coding If You Know What You're Doing](https://www.wearedevelopers.com/videos/100119-it-s-not-vibe-coding-if-you-know-what-you-re-doing) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Benefits of Using JMeter For Performance Testing](https://www.wearedevelopers.com/magazine/96-benefits-of-using-jmeter-for-performance-testing) - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)