Overview 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  4–5 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,...