QA Tester- Senior #26-21771

US Tech Solutions; Denver (CO); On-site; USD 65,000 - 87,000; Full time

Job summary

US Tech Solutions is seeking a QA/testing professional to design and execute test plans for RESTful APIs, Kafka processors, and Redis job schedulers in a fast-paced backend environment.

You will build automated test suites, run performance loads, and define SLAs while collaborating with developers on acceptance criteria and testability, ensuring robust CI/CD and containerized deployments for scalable systems.

Qualifications

• 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.

Responsibilities

• 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.

Skills

QA/testing experience

Performance testing

API testing

Event-driven testing

Docker & Kubernetes

CI/CD pipelines

JavaScript/TypeScript

Git workflows

Tools

k6

Artillery

JMeter

Gatling

Locust

Postman

REST clients

curl

supertest

Job description

$55 per hour

Denver, CO

Right to Hire

Duration: 4 months + Contract to hire

Requirements:

• 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

Responsibilities:

• 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

About US Tech Solutions:

US Tech Solutions is a global staff augmentation firm providing a wide range of talent on-demand and total workforce solutions. To know more about US Tech Solutions, please visit www.ustechsolutions.com (http://www.ustechsolutionsinc.com/)

US Tech Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

AI Statement: By applying, you acknowledge that AI-assisted tools may be used during hiring.