QA Tester- Senior(Hybrid)

Job Title

QA Tester- Senior (Hybrid)

Denver, CO

4 months

Virtual / In-Person

Local to Denver; local travel only/none beyond local area. The qualifying questions also indicate the candidate must have the required skills and be 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

Deliverables

• Process Flows

• Mentor and Knowledge transfer to client project team members

• Participate as primary, co and/or contributing author on any and all project deliverables associated with their assigned areas of responsibility

• Participate in data conversion and data maintenance

• Provide best practice and industry specific solutions

• Advise on and provide alternative (out of the box) solutions

• Provide thought leadership as well as hands on technical configuration/development as needed.

• Participate as a team member of the functional team

• Perform other duties as assigned.

S.No

Skill Requirement

QA Tester

5 10 years of QA/testing experience in backend or platform engineering

Hands-on experience with performance and load testing tools

Ability to analyze performance metrics such as P50/P95/P99 latencies, throughput, error rates, and CPU/memory utilization

Strong experience with API testing tools

Experience testing event-driven architectures and message queues

Familiarity with Docker, Docker Compose, and Kubernetes-based deployments

Experience with CI/CD pipelines

Comfortable reading and writing TypeScript/JavaScript

Experience with git workflows and branching strategies

Contact: Kris - View email address on us.fitly.work