Quality Assurance Engineer; Microsoft Azure IoT B2B

About Mesh Systems

Mesh Systems are the Connected Product People. As a trusted Microsoft Partner, we help clients build, scale, and unlock value from their digital products. We specialize in creating scalable, cloud-based systems to process massive data volumes for global clients.

We are currently on an ambitious path to merge IoT with cutting-edge Artificial Intelligence, opening doors to future-proof projects. We're looking for an experienced Software Engineer to work with our engineering teams and help us shape the future of connected technology.

Model: B2B Contract (100% Remote)

Availability: Collaboration within the Central European Timezone (CET).

Hourly Rate (USD): $30 - $40 USD / hour

Support: We provide support with formalities for Polish contractors working with a U.S. company.

As a Quality Assurance Engineer, you will ensure the reliability and quality of our IoT solutions across the entire technology stack:

• Design, develop, and execute comprehensive test plans for IoT systems spanning embedded devices and web/mobile applications.
• Perform end-to-end testing of IoT solutions, including device provisioning, connectivity, data ingestion, and cloud processing pipelines.
• Test hardware-software integrations, communication protocols (MQTT, AMQP, HTTP/REST, CoAP), and edge computing solutions.
• Develop and maintain automated test frameworks for APIs, web applications, and IoT device simulations.
• Conduct performance, load, and stress testing on cloud-based IoT platforms to ensure scalability and reliability.
• Validate data accuracy and integrity across the entire IoT data pipeline from device to cloud to application.
• Collaborate with cross-functional teams, including firmware engineers, backend developers, and Dev Ops, to identify and resolve quality issues.
• Create and maintain test documentation, bug reports, and quality metrics.
• Participate in design reviews and provide quality-focused feedback early in the development cycle.
• Troubleshoot complex issues across multiple layers of the technology stack (device, edge, cloud, application).
• Collaborate & Influence: Work in a small, autonomous engineering team, directly influencing the technical direction of our solutions.

We are seeking a versatile QA engineer with broad technical knowledge and experience testing complex, distributed systems:

• 3+ Years of experience in quality assurance, with preference for IoT, embedded systems, or cloud-based platforms.
• Experience with test automation frameworks and tools like:
• Selenium
• Playwright
• Cypress
• Postman
• Or Similar
• Proficiency in at least one programming language for test automation like:
• Python
• JavaScript/Type Script
• C#
• Hands‑On Experience with API testing and familiarity with RESTful services and message queuing systems.
• Knowledge of cloud platforms (preferably Azure) and understanding of cloud‑based testing strategies.
• Experience with CI/CD pipelines and integrating automated tests into Dev Ops workflows.
• Strong analytical and troubleshooting skills with the ability to diagnose issues across hardware, firmware, and software.
• Familiarity with version control systems (Git) and agile development methodologies.
• Excellent communication skills and ability to work collaboratively with distributed teams. Strong English proficiency for seamless collaboration with U.S. partners and clients.
• Detail‑oriented mindset with a passion for quality and continuous improvement.

• Experience with Azure Dev Ops and Azure Pipelines for CI/CD.
• Experience with Docker containerization.
• Experience with k6.
• Background in industrial IoT, asset management, or monitoring systems.

• Autonomy & Impact: Work in small, agile teams where your engineering decisions have a real impact. We value pragmatic solutions and customer‑focused thinking.
• Cutting‑Edge Technology: Get direct access to Microsoft Azure technologies in Private Preview thanks to our close partnership.
• Culture: Join a team of passionate professionals and share knowledge about the most innovative solutions on the market.
• Future Focus (IoT + AI): Be part of our transformation, integrating IoT solutions with AI/Machine Learning at the intersection of the most advanced technologies.
• Professional Growth: We offer a dedicated training budget and full support for Microsoft certifications
  .