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.
Top Skills
What We Do
At Ubiquiti Inc., we create technology platforms for Businesses, Smart Homes, and Internet Service Providers, driven by our goal to connect everyone, everywhere. To date, Ubiquiti has shipped over 100 million devices worldwide, from ISP networking products to next generation of IT solutions. Our growth is made possible by the dedicated team of hundreds behind the scenes. From software developers and product managers to designers and strategists, Team UI is driven to achieve our common goal: Simplifying IT.
At Ubiquiti, you’ll heighten your potential and broaden your horizons—all while shaping the future of connectivity. We invite you to join our team.
