Embedded QA & Test Engineer

• Test embedded C++ firmware on Linux/RTOS-based IoT gateways.
• Validate Azure IoT Hub communication workflows, including:
• Telemetry messaging
• Cloud-to-device (C2D) commands
• Device Twins
• Device Provisioning Service (DPS)
• Certificate rotation and secure connectivity

• Validate message queueing, offline buffering, reconnect logic, and retry behavior under real-world network conditions

• Validate message queueing, offline buffering, reconnect logic, and retry behavior under real-world network conditions

• Develop and execute test cases for:
• Modbus Serial (RTU): timing behavior, register maps, function codes, exception handling.
• Modbus TCP: multi-client scenarios, socket recovery, error handling.
• CAN bus: arbitration, extended/standard IDs, error frames, bus overload, and edge-case behavior.

• Uses protocol analyzers, CAN interfaces, Modbus simulators, and logic analyzers to capture and analyze traffic.

• Test firmware and system updates using hawkBit (deployment orchestration) and SWUpdate (A/B updates, failover, signing, rollback)
• Validate update workflows under stress, including:
• Interrupted updates (power loss, network drop)
• Corrupted image scenarios
• Update rollback and fallback behavior

• Ensure secure update chain-of-trust, signature verification, and partition layout integrity.

• Develop automated test suites using Python or C++ to validate firmware, protocols, OTA processes, and system services.
• Build hardware-in-the-loop (HIL) automated test setups for regression, protocol simulation, and device behavior testing.
• Integrate automated tests into CI/CD pipelines (GitHub Actions, GitLab, Azure DevOps, Jenkins).
• Maintain automation tools for serial logging, bus capture, cloud message verification, and gateway diagnostics.

• Investigate firmware and system issues via logs, traces, core dumps, serial output, and protocol captures.
• Reproduce field issues in controlled environments and collaborate with engineering teams to diagnose root causes.
• Generate test reports, defect metrics, and release readiness assessments.
• Contribute to continuous improvement of testing tools, processes, and standards.

• Bachelor of Computer Science or Engineering or equivalent years of experience.

• 3 years of experience in embedded system testing, QA engineering, or IoT device validation.

• 3 years of experience in embedded system testing, QA engineering, or IoT device validation.
• Experience testing embedded Linux or RTOS-based gateways.
• Hands-on experience with Azure IoT Hub (telemetry, C2D, twins, DPS), hawkBit and SWUpdate, Modbus Serial (RTU) and Modbus TCP, and CAN bus testing and analysis

• Strong understanding of C++ firmware behavior (reading & analyzing code, debugging tests).
• Strong Python scripting capability for automation and test tool development.
• Proficiency with lab equipment (CAN analyzers, Modbus simulators, USB-to-serial tools, oscilloscopes).
• Solid networking knowledge (TCP/IP, TLS, certificates, provisioning flows).

• Experience with IoT cloud platforms, fleet management, or gateway deployments
• Experience with MQTT, AMQP, REST APIs, or proprietary field protocols
• Experience building HIL / automated protocol simulation frameworks (pytest, Robot Framework, custom rigs).

• Familiarity with secure boot, signed firmware images, and SBOM/security compliance.

• Familiarity with secure boot, signed firmware images, and SBOM/security compliance.
• Knowledge of Yocto, Buildroot, systemd, and Linux internals.
• Familiarity with J1939, CANOpen, or other industrial stacks.
• Exposure to DevOps practices for firmware CI pipelines.
• Knowledge of SQL server and general database management concepts