Senior Software Engineer, Performance and Load Testing

Job overview

The Senior Software Engineer, Performance and Load Testing role is listed onsite in Aurora, IL. Compensation is not specified. The role supports performance validation for a high-volume, event-driven platform.

What you'll do

• Design and build traffic-replay tooling for large-scale transactional workloads
• convert API logs, event streams, and production exports into replayable load-test scenarios
• develop performance-testing utilities and frameworks
• simulate user behavior and workload patterns
• support load, stress, and scalability testing
• analyze application behavior and bottlenecks
• collaborate with QA and infrastructure engineers on testing strategies
• support remediation and automated testing in CI/CD workflows.

What we're looking for

Skills & competencies

software engineer

performance engineering

load testing

traffic replay

distributed systems

microservices

k6

locust

gatling

observability

aurora il

q1 technologies

Work arrangement

• Weekend coverage required

Why this role

The posting seeks senior specialists with seven years of software engineering experience focused on performance engineering. k6 is preferred; Locust, Gatling, or similar frameworks and distributed load generation experience are required.

About the employer

Q1 Technologies, Inc is hiring for this role. Industry: Computer Systems Design Services. Sector: 54.