Senior QA Engineer

Skills, Knowledge, Experience Required

• 5+ years of QA experience
• Strong hands-on Python experience for test automation
• Strong hands-on experience with pytest
• Strong experience testing MQTT or other message broker-based systems
• Proven experience designing and executing end-to-end tests for asynchronous workflows and multiple interacting services
• Strong practical experience with Docker Compose, including independently starting and troubleshooting local environments
• Experience embedding automated tests into CI/CD pipelines
• Strong backend and integration testing experience
• Experience debugging failures across distributed systems, including logs, service interactions, and environment setup
• Ability to work autonomously and contribute immediately with minimal ramp-up
• Clear written and verbal communication skills

Duties/role

• Defining practical test plans for backend, integration, and end-to-end testing across multiple services
• Identifying test scope, critical flows, edge cases, and success criteria together with developers and stakeholders
• Focusing test coverage on asynchronous workflows, broker-based communication, service interactions, and regression risk
• Helping establish lightweight, effective QA practices improving confidence in releases without unnecessary process overhead
• Designing, building, and maintaining automated tests in Python using pytest
• Creating end-to-end and integration test coverage for MQTT or other message broker-based communication patterns
• Validating asynchronous workflows involving multiple services, including message publishing, consumption, retries, timeouts, and error handling
• Independently spinning up, managing, and troubleshooting local test environments using Docker Compose
• Executing manual and exploratory testing where useful, especially around timing issues, race conditions, and multi-service failure scenarios
• Validating service behavior through APIs, broker interactions, and data checks where relevant
• Ensuring automated tests are reliable, maintainable, and suitable for execution in delivery pipelines
• Documenting, tracking, and communicating defects clearly, including reproduction steps, impact, and supporting evidence
• Investigating issues across logs, containers, broker traffic, and service interactions
• Working closely with developers to reproduce problems, verify fixes, and confirm resolution
• Providing clear feedback on quality risks, test coverage gaps, and release readiness
• Supporting the integration and ongoing maintenance of automated tests in CI/CD pipelines