QA Tester

QA Tester
Local to Denver-Hybrid

QA Tester
5-10 years of QA/testing experience in backend or platform engineering
Hands-on experience with performance and load testing tools (k6, Artillery, JMeter, Gatling, or Locust)
Ability to analyze performance metrics - P50/P95/P99 latencies, throughput, error rates, CPU/memory utilization
Strong experience with API testing tools (Postman, REST clients, curl, supertest)
Experience testing event-driven architectures (Kafka, message queues)
Familiarity with Docker, Docker Compose, and Kubernetes-based deployments
Experience with CI/CD pipelines (GitLab CI, Jenkins, or equivalent)
Comfortable reading and writing TypeScript/JavaScript
Experience with git workflows and branching strategies

Do you have required skills?
Are you okay going into the office?

Design and execute test plans for RESTful APIs, Kafka message processors, and Redis-based job schedulers
Build and maintain automated test suites (unit, integration, functional, end-to-end)
Design and execute performance and load tests to validate system behavior under peak traffic, sustained load, and stress conditions
Establish performance baselines, define SLAs (throughput, latency, error rates), and track regressions across releases
Conduct soak tests to identify memory leaks, connection pool exhaustion, and resource degradation over time
Validate Node.js library upgrades and dependency changes across the shared library ecosystem (lantern-utils, lantern-nest-utils, lantern-logger, lantern-requester, lantern-scheduler)
Test containerized services in Docker and Kubernetes (EKS) environments
Validate CI/CD pipelines (GitLab CI) - ensure builds, tests, and deployments function correctly
Perform regression testing for Node.js runtime upgrades (e.g., Node 18 ? Node 24 migrations)
Collaborate with developers to define acceptance criteria and testability requirements
Monitor and validate application performance using Datadog APM (dd-trace)
Test Redis cluster interactions, DynamoDB operations, and Kafka consumer/producer flows
Identify, document, and track defects through resolution