Job Details

Performance Test Engineer

We're seeking a hands-on Performance Test Engineer to design and execute the end-to-end performance strategy for an ad-serving platform (Akka-based Java microservices) targeting <50ms response times and 45 million concurrent requests/users. You'll build the test harness, model real-world traffic, execute large-scale distributed load tests, and turn findings into actionable tuning guidance.

Responsibilities:

• Own the performance test strategy & plan (load, stress, spike, soak, scalability, failover).
• Model traffic for ad-supported streaming (burstiness, fan-out, cache hit/miss, cold-start, geo distribution, p95/p99/p999).
• Build automated load frameworks & scripts (preferably Locust/Python; JMeter where appropriate). Parameterize data, correlations, and think-time.
• Orchestrate distributed load generation (cloud workers, containerized runners) to simulate 45M concurrent at scale.
• Integrate with observability/APM (metrics, logs, traces) to correlate system bottlenecks across app, JVM/GC, Akka dispatchers, network, caches, and databases.
• Produce capacity models & SLAs/SLOs dashboards; run performance gates in CI/CD.
• Partner with DevOps & developers to recommend tuning (thread pools, connection pools, GC, autoscaling, cache strategies, DB indexes/queries).
• Document test design, scenarios, results, and clear remediation plans.

Technology Proficiency Needed:

• Load tools: Locust (Python), JMeter; (nice to have: k6, Gatling).
• Scripting & automation: Python (core), Bash; infra spin-up via Terraform/Docker/Kubernetes for load farms.
• Metrics/Tracing: CloudWatch, OpenTelemetry, Prometheus/Grafana; log analysis pipelines.
• Familiarity with Java service behaviors (Maven/Gradle pipelines, JVM/GC basics); Akka concepts are a plus.

What Makes You a Great Fit:

• 35+ years in performance engineering for large-scale, low-latency distributed systems; streaming/ad-tech exposure is a plus.
• Demonstrated success hitting strict SLAs (p95/p99 latency) under millions of users/RPS.
• Strong Python and test-automation skills; ability to build maintainable, reusable test frameworks.
• Experience designing realistic workload models, synthetic data generation, and distributed load execution in cloud.
• Analytical, communicates crisply with stakeholders, converts data into prioritized recommendations.

Logistics:

• Location: Remote (prefer India candidates).
• Schedule: Must join US morning calls (Eastern Time) as needed.
• Start: 13 weeks from offer.
• Term: Through end of January (likely extension).