Embedded Firmware Engineer

About the role:

The Embedded Software Engineer is responsible for developing and maintaining firmware and software for Safetrust's IoT platform, leveraging BLE, Wi-Fi, and other cutting-edge technologies. This position plays a key role in the product development team, ensuring new and existing embedded products are reliable, performant, and shippable.

This role focuses on execution and quality — writing and debugging embedded C/C++, collaborating on automated testing, and optimizing performance — and contributes to Safetrust's continued growth by helping revolutionize physical access control systems.

Key Responsibilities:

• Design, develop, and maintain firmware/software for new and existing embedded products.
• Develop and debug code in C and C++.
• Collaborate on automated unit and integration testing to ensure product quality.
• Optimize software performance and reliability for embedded systems.
• Work cross-functionally with hardware, QA, and cloud teams to deliver complete features.
• Design, develop, test, and maintain embedded firmware for Safetrust's IoT access control products using C/C++.
• Develop firmware for BLE, Wi-Fi, LTE, NFC, and other wireless communication technologies used across Safetrust products.
• Implement and optimize firmware running on ARM-based microcontrollers including Nordic, STM32, Cypress, and ESP platforms.
• Develop, integrate, and maintain RTOS-based applications, drivers, middleware, and communication stacks.
• Design and implement communication interfaces including SPI, I2C, UART, USB, CAN, and GPIO.
• Debug complex firmware, hardware, and integration issues using oscilloscopes, logic analyzers, JTAG/SWD debuggers, and other embedded development tools.
• Optimize firmware performance, memory utilization, power consumption, and reliability to support battery-powered and always-on devices.
• Collaborate with Hardware Engineering throughout board bring-up, prototype validation, manufacturing support, and product verification.
• Develop automated unit tests, integration tests, and regression testing to improve firmware quality and reduce production defects.
• Participate in architecture discussions, technical design reviews, code reviews, and continuous improvement initiatives.
• Work closely with Cloud, Mobile, QA, Product Management, and Manufacturing teams to deliver complete product features.
• Support manufacturing and field teams by investigating production issues, customer-reported defects, and firmware updates.
• Maintain technical documentation including firmware architecture, interface specifications, troubleshooting guides, and release documentation.
• Continuously evaluate new embedded technologies, development tools, communication protocols, and industry best practices that improve Safetrust products.

Skills & Experience:

• B.S., M.S., or equivalent degree in Computer Science, Computer Engineering, Information Technology, or a related field.
• 2+ years of experience in embedded firmware and application development (4+ for Senior).
• Strong proficiency in C and C++ programming.
• Solid understanding of software compilers and debugging tools.
• Knowledge of software architecture and design patterns for embedded systems.
• Proficiency in data structures and algorithms.
• Hands-on experience with BLE, Wi-Fi, LTE, and ARM MCUs (Nordic, STM, Cypress, ESP).
• Familiarity with communication protocols (I2C, UART, SPI).
• Understanding of Real-Time Operating Systems (RTOS).
• Logical thinking, problem-solving ability, and effective teamwork skills.

Nice to Have / Preferred

• Familiarity with Python, C#, or similar additional languages.
• Knowledge of high-level protocols (MQTT, REST APIs).
• Proactive learning attitude and adaptability to new technologies.

Success Profile:

The ideal candidate is:

• Detail-oriented and disciplined about embedded code quality and reliability.
• Proactive and adaptable to new technologies and shifting priorities.
• A strong communicator who collaborates well with hardware, QA, and cloud teams.
• Able to execute independently on firmware features from spec to ship.
• 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 18 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.