For our client that builds and operates trading platforms we are seeking a
Performance Test Engineer.
This engineer will help ensure that the trading systems remain fast, stable, and resilient under rapidly growing and highly variable workloads.
This role is ideal for engineers who thrive at the intersection of systems engineering, performance analytics, large-scale distributed architecture, and deep observability.
This is a full time permanent role with flexible work structure (hybrid/remote within Ireland) and the salary guidance is €75K.p.a.
Responsibilities:
Performance Engineering & Benchmarking
* Design, implement, and maintain repeatable performance, load, stress, and soak testing frameworks for backend trading and market-data systems.
* Develop robust NFR (Non-Functional Requirements) test suites aligned with reliability targets, system SLAs, and internal capacity planning models.
Observability, Monitoring & Diagnostics
* Implement and extend performance dashboards using Grafana, Prometheus, and related telemetry tools, enabling deep visibility into service latency, concurrency, throughput, and resource usage.
* Conduct advanced investigations using metrics, logs, traces, and flame graphs to isolate hotspots and improve system responsiveness.
Capacity Planning & System Resilience
* Perform load forecasting for traffic spikes.
* Assess architectural resilience and make data-driven recommendations for improvements in throughput, latency, failover behaviour, and resource utilisation.
Requirements:
* 5+ years of hands-on experience in performance engineering for high-traffic, distributed systems.
* Strong expertise with JMeter or equivalent performance testing frameworks.
* Deep understanding of JVM internals, memory management, garbage collectors, and concurrency.
* Experience integrating performance tests into CI/CD and automated environments.
* Hands-on experience with Prometheus, Grafana, ELK/ElasticStack, or comparable APM tools.
* Strong knowledge of scripting languages (Bash, Python or similar) for automation and tooling.