Senior Test Engineer - App Certification (Embedded Systems)

About the role

This role is responsible for validating 3rd-party applications integrated with Mercury controllers, ensuring they meet strict security, stability, compatibility, and resource usage requirements. You will play a critical role in safeguarding our devices from vulnerabilities introduced by external applications, while collaborating with global teams and driving quality and security best practices.

Responsibilities

• Leading validation and certification testing of 3rd-party applications from a platform integrity and security perspective.
• Evaluating application behavior within embedded Linux environments, including process isolation, file system access, resource consumption, and system calls and permissions.
• Validating safe interaction with controller firmware, OS, and hardware interfaces.
• Conducting compatibility and integration testing with controller APIs and communication protocols: REST, MQTT, CoAP.
• Performing network and protocol analysis using tools such as Wireshark and packet sniffers.
• Testing and validating serial communication interfaces and low-level protocols.
• Monitoring runtime behavior to detect abnormal or malicious activity.
• Developing and maintaining automated test frameworks and CI/CD pipelines.
• Writing scripts for test automation, monitoring, and security validation.
• Defining and enforcing application acceptance criteria and certification standards.
• Identifying risks introduced by untrusted or third-party code execution.
• Documenting security findings, validation results, and certification outcomes.
• Collaborating with engineering, product, and external partners on secure integration practices.
• Mentoring junior engineers and promoting best practices in embedded QA and security testing.

Requirements

• Bachelor’s degree in Computer Engineering, Computer Science, or related field (or equivalent experience).
• 5+ years of QA experience with embedded systems, firmware, or IoT devices.
• Strong understanding of Linux-based embedded systems.
• Experience with system-level testing.
• Solid knowledge of hardware/software/firmware constraints in embedded environments.
• Experience with resource monitoring, benchmarking, and profiling (CPU, memory, storage).
• Hands-on experience with REST APIs, MQTT, CoAP.
• Experience with network analysis and packet capture tools (e.g., Wireshark).
• Familiarity with serial communication protocols (UART, RS-232, RS-485).
• Strong experience with test automation frameworks and environments.
• Proficiency in Bash, or similar scripting languages.
• Experience in software security testing, vulnerability assessment, or system hardening validation.
• Strong understanding of QA methodologies, test design, and defect tracking.
• Excellent troubleshooting, analytical, and problem-solving skills.
• Strong communication skills, including working with external partners.

Qualifications

• Experience with embedded platform certification programs or app validation frameworks is preferred.
• Understanding of secure application onboarding and approval workflows for embedded or IoT platforms is preferred.
• Experience validating untrusted or third-party code execution in constrained environments is preferred.
• Familiarity with sandboxing, process isolation, or lightweight containerization in embedded Linux is preferred.
• Knowledge of firmware security concepts (secure boot, code signing, chain of trust, TEE) is preferred.
• Background in penetration testing, fuzz testing, or threat modeling is preferred.
• Experience analyzing runtime system behavior and anomaly detection is preferred.
• Familiarity with access control systems (PACS) and controller architectures is preferred.
• Experience with secure firmware update mechanisms and device lifecycle management is preferred.

Skills

• Linux-based embedded systems.
• System-level testing.
• Resource monitoring and profiling.
• REST APIs, MQTT, CoAP.
• Network analysis and packet capture tools.
• Serial communication protocols.
• Test automation frameworks.
• Bash scripting.
• Software security testing.
• QA methodologies and defect tracking.
• Penetration testing, fuzz testing, threat modeling.
• Runtime system behavior analysis.
• Access control systems and controller architectures.
• Secure firmware update mechanisms.

Benefits

Competitive salary and rewards package, competitive benefits and annual leave offering, vibrant, welcoming & inclusive culture, extensive career development opportunities, and support for remote work.

Pay

The base salary for CA is $110,000 to $118,000.

Schedule

Flexible work schedule to accommodate your needs.