Job Summary

8 hour work day. Preferably in Mexico City area. Would like a hire to overlap/train before our incumbent rolls off the project end of August.

Regarding the senior it would be similar but not leading the team however some mentoring of a junior offshore team member would be required.

Responsibilities

1. Performance Test Scripting

- Strong experience with JMeter scripting.
- Ability to write or debug custom scripts using Groovy and JavaScript.
- Experience with correlation, parameterization, assertions, timers, controllers, reusable functions and custom logic.
- Ability to troubleshoot script failures dynamic values authentication, cookies, headers and session handling.

2. Workload Modeling and Test Design

- Ability to analyze business flows and design realistic workload models.
- Experience designing load, stress, endurance, spike and scalability tests.
- Ability to calculate user load, TPS or TPM pacing, think time, ramp up and transaction mix based on production usage.
- Experience validating test data readiness and environment readiness.

3. Production Log and Traffic Analysis

- Ability to analyze production logs and traffic patterns to identify peak usage transaction volume, error trends and response time behavior.
- Experience using production metrics to create accurate performance test scenarios.
- Ability to compare production behavior with test environment results.

4. Monitoring and Observability

- Hands‑on experience with Datadog, AppDynamics and Kibana.
- Ability to monitor application API, JVM/.NET, IIS, database, container and infrastructure metrics.
- Experience identifying bottlenecks related to CPU, memory, GC, thread pools, connection pools, database queries, downstream services, cache and network latency.
- Ability to correlate JMeter results with monitoring tool metrics.

5.



AWS or Cloud or Container Monitoring

- Experience monitoring applications hosted on AWS cloud platforms.
- Understanding of containers, Kubernetes or ECS or EKS, pods, services, nodes, CPU or memory limits, autoscaling and cloud infrastructure behavior.
- Ability to analyze container‑level performance issues and work with DevOps teams.

6. Distributed Testing Setup

- Experience setting up and executing distributed performance tests.
- Good understanding of load generators, controller, agent setup, firewall or port issues, data file distribution, result collection and capacity planning.
- Ability to debug common distributed testing challenges such as connectivity issues, file path issues, permission issues, resource saturation and inconsistent results.

7. Performance Analysis and Reporting

- Ability to analyze response times, throughput, error percentage, percentiles, saturation points and bottlenecks.
- Strong skills in preparing clear observations and recommendations.
- Ability to explain performance findings to technical and non‑technical stakeholders.
- Experience working with development, infrastructure, database, DevOps and application teams for root‑cause analysis.

8. Leadership and Communication

- Should be able to lead performance testing activities independently.
- Should have strong communication skills and the ability to coordinate with multiple teams.
- Should be proactive in identifying risks, blockers, environment issues and test data gaps.
- Should be able to mentor junior performance testers if needed.

Preferred Tools and Technologies

- JMeter
- Groovy / JavaScript
- Datadog
- AppDynamics
- Kibana / Elasticsearch
- AWS monitoring
- Docker / Kubernetes / ECS / EKS
- CI/CD pipeline integration
- Git / Jenkins
- API testing tools
- SQL/log analysis

#J-18808-Ljbffr

📌 Performance Tester (Ciudad de México)
🏢 Cognizant
📍 Ciudad de México