Senior Performance Engineer (Performance Testing)

TL;DR

Senior Performance Engineer (UDP/Kafka): Ensuring the performance and reliability of large-scale distributed systems across AWS and GCP with an accent on UDP throughput, latency, and packet-loss analysis. Focus on solving bottleneck challenges across network and compute layers and integrating automated performance validation into CI/CD pipelines.

Location: Must be based in Poland (Remote/Office options available)

Company

hirify.global is a leading global IT services provider specializing in software development and digital transformation.

What you will do

• Validate UDP throughput, latency, jitter, and packet-loss behavior across AWS and GCP at high scales.
• Develop and maintain load profiles for Kafka streams, REST APIs, and data pipeline read/write paths.
• Execute stress, soak, spike, and capacity testing to determine scaling limits and autoscaling behavior.
• Analyze bottlenecks across network, compute, storage, and database layers using observability data.
• Integrate performance test scenarios into Jenkins-based CI/CD pipelines for regression detection.
• Produce benchmarks and evidence reports to support cloud migration acceptance.

Requirements

• 5+ years of experience in performance and load testing for backend and distributed systems.
• Strong expertise in UDP performance testing and high-rate packet generation using TRex.
• Proficiency in Locust for load testing implementation and execution.
• Proven expertise in high-throughput Kafka performance testing and network-level analysis (tcpdump).
• Experience with observability platforms like New Relic, OpenTelemetry, Prometheus, and Grafana.
• English: B2 level required for daily communication with client-side software engineering teams.

Culture & Benefits

• Equal Opportunity Employer ensuring a fair and inclusive work environment.
• Flexible work arrangement with options for both remote and office-based work.
• Opportunity to work on large-scale distributed systems within a global professional environment.