Performance & Load Testing Engineer - Traffic Replay

AI AXISS INC; New York (NY); On-site; USD 120,000 - 160,000; Full time

Job summary

AI AXISS INC in New York seeks a Software Quality Engineer specializing in Performance and Load Testing to build tooling and infrastructure for realistic, production-like workloads. This role focuses on developing traffic-replay systems, processing logs, and transforming large datasets into reusable test scenarios to reproduce performance issues and validate remediation.

The engineer will automate conversion of raw traffic into load-test configurations, manage replay parameters, and collaborate

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or a related technical field.
• 6+ years of professional software engineering experience.
• Strong programming skills in Python, Java, Go, C++, or a similar language.
• Strong understanding of HTTP, REST APIs, JSON, WebSockets, event-driven architectures, and distributed systems.
• Experience building automation, developer tooling, or data-processing systems.
• Experience working with large datasets, logs, or high-volume production telemetry.
• Strong understanding of latency, throughput, concurrency, resource utilisation, and scalability.

Responsibilities

• Design and build traffic-replay and workload-generation tooling for performance and load testing.
• Develop systems that replay realistic HTTP/API requests, event traffic, WebSocket interactions, and asynchronous workloads.
• Parse API, application, event, and telemetry logs to identify representative production traffic patterns.
• Transform large log exports into structured, parameterised, replayable test scenarios.
• Build tooling to clean, normalise, anonymise, correlate, and enrich production traffic data before replay.
• Use approved LLM-assisted workflows to analyse appropriately protected exports, identify traffic patterns, and accelerate test-scenario generation and workload modelling.
• Automate conversion of raw traffic data into reusable load-test configurations and scripts.
• Control traffic volume, concurrency, request sequencing, timing, dependencies, and event relationships during replay.
• Integrate replay tooling with performance-testing platforms and CI/CD pipelines.
• Analyse replay results, investigate root causes, and partner with application engineers on remediation.
• Collaborate with developers, QA, SRE, DevOps, and infrastructure teams to reproduce performance issues.
• Develop debugging and diagnostic capabilities and automate performance-regression testing across releases.
• Document tooling, workflows, test scenarios, and performance findings.

Skills

Python

Java

Go

C++

HTTP/REST

JSON

WebSockets

Distributed systems

Data processing

Automation tooling

CI/CD

Education

Bachelor's degree in Computer Science / Software Engineering

Job description

AI AXISS INC in New York seeks a Software Quality Engineer specializing in Performance and Load Testing to build tooling and infrastructure for realistic, production-like workloads. This role focuses on developing traffic-replay systems, processing logs, and transforming large datasets into reusable test scenarios to reproduce performance issues and validate remediation.

The engineer will automate conversion of raw traffic into load-test configurations, manage replay parameters, and collaborate