Senior Backend QA Engineer - MQTT, Docker, Python

Star; Wrocław; Hybrid; PLN 96,000 - 165,000; Part time

Benefits offered by this job

Flexible working model

Health insurance

Unlimited vacations

Travel opportunities

Job summary

Star is seeking a hands-on QA contractor to test a backend, multi-service application focused on asynchronous communication patterns. You will spin up services with Docker Compose, write automated tests in Python using pytest, and validate MQTT or other broker-based flows integrated into CI/CD pipelines.

The role emphasizes end-to-end and integration testing across distributed systems, autonomy, and practical testing in real environments.

Qualifications

• 5+ years of QA experience across backend and integration testing.
• Hands-on Python test automation using pytest and related tools.
• Experience with MQTT or broker-based systems and asynchronous workflows.

Responsibilities

• Define practical test plans for backend, integration, and end-to-end testing across multiple services.
• Identify test scope, critical flows, edge cases, and success criteria with developers and stakeholders.
• Focus on asynchronous workflows and broker-based communication across services; establish lightweight QA practices.

Skills

QA experience

Backend testing

Integration testing

Python testing

pytest

MQTT testing

Docker Compose

CI/CD

Debug distributed systems

Autonomous work

Communication skills

Tools

Docker Compose

Job description

Star is seeking a hands-on QA contractor to test a backend, multi-service application focused on asynchronous communication patterns. You will spin up services with Docker Compose, write automated tests in Python using pytest, and validate MQTT or other broker-based flows integrated into CI/CD pipelines.

The role emphasizes end-to-end and integration testing across distributed systems, autonomy, and practical testing in real environments.