Performance & Resiliency Test Engineer - Hybrid

Programmers.io; O’Fallon (MO); Hybrid; USD 90,000 - 130,000; Full time

Job summary

Programmers.io is seeking a Performance & Resiliency Test Engineer in O'Fallon, MO with hybrid work (4 days onsite, 1 day remote). This full-time/contract role focuses on validating functional behavior, transaction integrity, performance, failover, recovery, and production readiness of mission-critical systems.

The ideal candidate will bring expertise in performance engineering, resiliency testing, network protocols, and high-availability platforms, plus hands-on experience with automated

Qualifications

• Experience with performance engineering and resiliency testing.
• Strong TCP/IP networking and packet-level troubleshooting experience.
• Experience with automated test frameworks and failure-injection techniques.
• Hands-on experience with performance and capacity testing tools.
• Strong defect analysis, debugging, and technical documentation skills.
• Experience validating high-availability and failover architectures.

Responsibilities

• Develop and execute end-to-end test plans across lab, staging, and lower environments.
• Validate traffic movement and persistent TCP connections during maintenance and failure scenarios.
• Perform functional, integration, regression, negative, load, soak, capacity, failover, and recovery testing.
• Validate proxy bypass and return-to-legacy recovery procedures.
• Reproduce defects, analyze logs and packet captures, and support root cause analysis.
• Define test evidence, acceptance criteria, certification results, and operational readiness sign-offs.
• Collaborate with development, infrastructure, and operations teams to improve system resiliency.

Skills

Performance Testing

Resiliency Testing

Network Testing

Automation Testing

Load Testing

Soak Testing

Capacity Testing

High Availability

TCP/IP

Tools

Packet Analysis

Job description

Programmers.io is seeking a Performance & Resiliency Test Engineer in O'Fallon, MO with hybrid work (4 days onsite, 1 day remote). This full-time/contract role focuses on validating functional behavior, transaction integrity, performance, failover, recovery, and production readiness of mission-critical systems.

The ideal candidate will bring expertise in performance engineering, resiliency testing, network protocols, and high-availability platforms, plus hands-on experience with automated