Firmware & Device QA Engineer

About the role:
The QA Engineer (Firmware / Device) is responsible for validating the firmware and hardware-software integration of Safetrust's readers, sensors, and gateways. This position plays a key role in the QA organization, ensuring devices behave correctly across BLE, Wi-Fi, NFC, secure boot, OTA updates, and the full credential-presentation flow.
This role focuses on hands-on device testing, tooling, and defect triage, and contributes to Safetrust's continued growth by ensuring firmware releases are reliable in real environments before they reach customers.
Key Responsibilities:
Design, develop, execute, and maintain comprehensive test plans, test cases, and validation procedures for embedded firmware and connected devices.
Perform functional, integration, regression, system, interoperability, end-to-end, performance, stress, endurance, and environmental testing across Safetrust's embedded product portfolio.
Validate firmware functionality across BLE, Wi-Fi, NFC, Ethernet, USB, wired, and other communication interfaces under normal and adverse operating conditions, including edge cases such as low signal strength, interference, and power loss.
Verify secure boot, OTA firmware updates, factory provisioning, credential management, encryption, and recovery mechanisms.
Develop automated test scripts, frameworks, and small tooling using Python, Shell, or other scripting languages to improve regression coverage, testing efficiency, and log analysis.
Design, build, maintain, and continuously improve hardware test labs, fixtures, automation rigs, racks, instrumentation, and validation environments.
Investigate firmware defects and customer-reported field issues by collecting logs, reproducing issues, analyzing root causes, and partnering with engineering teams to resolve problems.
Track and document defects with detailed reproduction steps, logs, risk assessments, impact assessments, and recommended corrective actions in the bug-tracking system.
Participate in design reviews, requirements reviews, and release readiness activities to ensure quality is built into products early.
Collaborate with Firmware, Embedded Linux, Hardware, AI, Mobile, Cloud, and Product teams throughout the software development lifecycle.
Develop and maintain regression test suites supporting continuous integration, continuous delivery pipelines, and release sign-off criteria.
Monitor quality metrics including defect leakage, regression coverage, release readiness, and production quality trends.
Support manufacturing validation, production testing, and investigation of customer-reported field issues.
Continuously improve QA methodologies, automation coverage, and testing standards across Safetrust's engineering organization.
Skills & Experience:
Bachelor's degree in Computer Engineering, Electronics, Information Technology, or a related field.
1–3 years of QA experience, ideally on hardware/firmware or IoT products (Junior: 1–2; Middle: 2–3+).
Working knowledge of software QA methodologies, test planning, and bug-tracking tools (Jira or similar).
Comfortable using lab equipment such as multimeters, logic analyzers, and serial console tools.
Basic scripting in Python or shell for log parsing and test automation.
Understanding of common protocols: BLE, Wi-Fi, TCP/IP, USB, UART.
Strong attention to detail, methodical approach, and good written English for clear bug reports.
Nice to Have / Preferred
Experience with access-control, RFID/NFC, or IoT device testing.
Exposure to test automation frameworks (pytest, Robot Framework).
Familiarity with embedded debug tools (J-Link, ST-Link, oscilloscopes).
ISTQB Foundation Level certification.
Success Profile:
The ideal candidate is:
Methodical and detail-oriented when validating hardware/firmware behaviour.
Hands-on and comfortable working directly with lab equipment and physical devices.
A clear communicator who writes precise, reproducible bug reports.
Able to triage and troubleshoot issues independently before escalating.
Comfortable working across regions and functions in a global environment (Vietnam, US, Australia).
Why you'll love working here
Competitive salary based on experience and performance
13th-month salary
Daily lunch is provided at the office
Free coffee, tea, and refreshments
Full statutory insurance (social, health, unemployment)
Annual health check-up and paid annual leaves
Professional, international working environment
Working Location: Level 6 Khanh Hoi 2 Building 360A Ben Van Don, Vinh Hoi, Ho Chi Minh City
Safetrust is an equal opportunity employer and prohibits discrimination and harassment of any kind. We offer an inclusive workplace and will not tolerate discrimination against any job candidate or employee due to age, race, religion, color, ethnicity, national origin, gender, gender identity/expression, sexual orientation, membership in an employee organization, medical condition, family history, genetic information, veteran status, marital status or parental status.

Employment type
Full-Time

Work arrangement
No