Role & seniority: Quality Assurance Engineer (mid-level, 3+ years QA experience; IoT/cloud focus)

Stack/tools

IoT, embedded systems, cloud-based platforms
Test automation: Selenium, Playwright, Cypress, Postman (or similar)
Programming for tests: Python, JavaScript/TypeScript, or C#
API testing, REST, message queues; CI/CD integration; Git; Azure familiarity
Cloud: Azure (preferred)

Top 3 responsibilities

Design, develop, and execute end-to-end test plans for IoT systems (embedded devices, web/mobile apps) and data pipelines
Build and maintain automated test frameworks; perform performance, load, and stress testing; validate data integrity across device–edge–cloud
Collaborate with firmware, backend, and DevOps teams; contribute to design reviews; document tests, bugs, and quality metrics

Must-have skills

3+ years QA experience (IoT/embedded or cloud-based systems preferred)
Proficiency in test automation tools (Selenium, Playwright, Cypress, Postman) and at least one test-lang (Python/JavaScript/TypeScript/C#)
API testing expertise; REST/messaging queues; CI/CD integration; Git; agile experience
Cloud testing knowledge (Azure preferred); strong troubleshooting and analytical skills
Excellent communication for distributed teams; detail-oriented with focus on quality

Nice-to-haves

Azure DevOps/Azure Pipelines, Docker, k6
Experience in industrial IoT, asset management, or monitoring systems
Location & wo

Full Description

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.

Compensation And Contract Model

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.

Requirements

What You Will Do

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 DevOps, 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

What You'll Bring

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.

Quality Assurance Engineer (Microsoft Azure IoT) - (B2B Contract)