Firmware Engineer (Junior+ Level)

JOB DESCRIPTION

• Develop, maintain, and test firmware for embedded systems and IoT devices.
• Work with microcontrollers and embedded platforms such as ESP32, STM32, Nordic nRF, or similar.
• Interface with common embedded peripherals and modules using UART, SPI, I2C, GPIO, ADC, PWM, and interrupts.
• Read and analyze circuit schematics, component datasheets, reference designs, and hardware specifications.
• Support hardware bring-up, board testing, and debugging of embedded circuits.
• Assist in PCB design review, pin mapping, signal routing checks, and hardware validation.
• Test and debug embedded systems using tools such as a multimeter, oscilloscope, logic analyzer, power supply, and soldering tools.
• Collaborate with hardware, firmware, mechanical, and software teams to deliver complete embedded products.
• Document test results, hardware issues, firmware behavior, and debugging procedures.
• Support product improvement related to stability, power consumption, signal quality, and manufacturability.

REQUIREMENTS

1. Embedded Firmware Engineering

• Programming Skills: Proficient in C/C++ specifically optimized for resource-constrained embedded systems.
• Microcontrollers (MCUs): Hands-on experience with popular architectures such as ESP32, STM32, Nordic nRF, AVR, or PIC.
• Hardware Peripherals: Strong command of configuring and interfacing low-level peripherals:
• Communication Protocols: UART, SPI, I2C.
• Core Peripherals: GPIO, ADC, PWM, Timers, and Interrupts.
• Documentation Literacy: Ability to efficiently read, interpret, and extract technical details from MCU datasheets, reference manuals, and pinout tables.
• Development Workflow: Solid experience with standard firmware workflows, including building, flashing, logging, and hardware-in-the-loop debugging.
• System Optimization: Deep understanding of real-time embedded constraints, including memory footprint management, timing behavior, and low-power modes.
• Wireless Connectivity (Preferred): Familiarity with at least one wireless stack is a strong plus:
• Short-range/Mesh: BLE, Wi-Fi, Zigbee, Matter.
• Long-range: LoRa.
• Version Control: Basic proficiency with Git/GitHub (branching, pull requests, resolving merge conflicts, and versioning best practices).

2. Hardware & PCB Design

• Circuit Theory & Schematics: Strong foundational knowledge of electronics. Proven ability to analyze complex electronic circuit schematics and PCB layouts.
• Component Selection: Deep understanding of active and passive components, including resistors, capacitors (decoupling), diodes, transistors/MOSFETs, voltage regulators, crystals, connectors, sensors, and battery charging circuits.
• Hardware Fundamentals: Solid grasp of voltage levels, logic thresholds, pull-up/pull-down configurations, signal integrity basics, grounding topologies, and power distribution networks (PDN).
• ECAD Tools: Familiarity with at least one major PCB design software: KiCad, EasyEDA, Altium Designer, or Proteus.
• PCB Design Principles: Basic understanding of layout best practices:
• Component placement strategy and connector orientation.
• Power routing vs. signal routing isolation.
• Proper placement of decoupling capacitors and ground planes.
• Design for Assembly (DFA) and Design for Testing (DFT).

3. Prototyping, Bring-up & Lab Tools

• Prototyping Skills: Practical experience in circuit prototyping, breadboarding, manual soldering (THT/SMD), wiring, and mechanical assembly of hardware prototypes.
• Lab Equipment Proficiency: Competency in using electronic diagnostic and measurement tools for hardware validation and debugging:
• Digital Multimeter (DMM) & Oscilloscope.
• Logic Analyzer & Programmable DC Power Supply.
• Soldering Station / Hot Air Rework Station.
• Hardware Bring-up: Ability to systematically execute PCB bring-up, run hardware-level debugging, and perform initial prototype validation to ensure hardware-firmware alignment.

BENEFITS

1. Competitive Compensation:

• Competitive salary, bonuses, and monthly allowances.
• Annual performance appraisal and salary review (2 times/year)
• 13th salary and extra bonuses based on performance and profitability.
• Monthly entertainment and team-building allowances.
• Provided working tools: laptop and additional screen.
• Own Your Device policy - empowering you to personalize and take full ownership of your work device after 3 years
• Annual health checkup
• Medical expense support for employees and their family members (spouse, children, parents), covering medical treatment and medication costs

2. Continuous Learning and Development:

• Work with international clients.
• On-the-job training
• Learning budget support

3. Fun Perks at Work:

• Weekly happy hour and free drinks & snacks at the office
• Celebrations for public holidays and special occasions: Tet, Women’s Day, Men’s Day, Mid-Autumn Day, Christmas Day,…
• Clubs and sports activities: football, badminton, charity activities,...
• A company trip every summer, an annual year-end party, team-building activities, and so much more fun are waiting for you!

WORKING TIME

• 8h30-17h30 Monday to Friday