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Embedded Firmware Engineer

Ubiquiti Inc. ↗

📍 Taipei, Taiwan 🇹🇼

full-time

mid-level

Expired

Posted —

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Key Skills

LinuxVoIPSIPC++TCP/IP

Industry

Consumer ElectronicsTelecommunications

Job Description

We are seeking a skilled Embedded Linux VoIP Phone Engineer to join our firmware team. The ideal candidate will have strong technical expertise in embedded Linux, VoIP protocols, and multi-threaded programming. You will be responsible for designing, developing, and maintaining firmware for our next-generation VoIP phones.

Basic Qualifications

Hands-on experience with Linux kernel, bootloaders (U-Boot), and root filesystem.
Strong skills in C, C++ for embedded systems. Familiarity with Bash/Python scripting is a plus.
Deep understanding of SIP, RTP, SRTP, RTCP, STUN, TURN and ICE is essential.
Familiarity with audio codecs (G.711, G.722, G.729, Opus, AAC) and echo cancellation (AEC), noise suppression, and jitter buffering.
Strong knowledge of TCP/IP, UDP, DHCP, DNS, VPN, VLAN, and QoS for VoIP network environments.
Experience with I2C, SPI, UART, GPIO, and Ethernet PHY drivers for hardware integration.
Understanding of TLS/DTLS, SRTP, HTTPS, and network encryption for securing voice traffic.
Strong understanding of multi-threaded programming, synchronization techniques, and inter-process communication (IPC).
Experience with Buildroot, Yocto, or OpenWRT for Linux image creation and cross-compilation.
Proficiency in using GDB, JTAG debuggers, Wireshark, SIP analyzers, and performance profiling tools.
Familiarity with Git, Jenkins, Docker, and automated build/test pipelines for firmware.
BS/MS in Computer Engineering, Computer Science or equivalent.
Fluent in both written and spoken English to work effectively within a highly collaborative environment with colleagues around the world.

Preferred Qualifications

Knowledge of secure coding practices for embedded systems.
Familiarity with networking concepts, including TCP/IP, UDP, and VLANs.
Experience with VoIP, SIP and WebRTC is a plus

Job Description

In this role you will implement the firmware of UniFi product line, to make the best user experience product
You will also implement features to support hardware testing and diagnosis of various kinds of embedded devices.
This is a highly cross functional role and you’ll work closely with various teams, like EE, Backend, Frontend, Mobile, QA, Factory and Manufacturing.