Embedded Firmware Engineer (Switching)

About Ubiquiti 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: Rethinking IT. At Ubiquiti, you’ll heighten your potential and broaden your horizons - all while shaping the future of connectivity. The Position: The Ubiquiti Kaunas office is looking for a talented and self-driven embedded C/C++ developer. We expect you to bring your experience, enthusiasm and creativity wherever you go and put them in the work you do. You should be able to think out of the box when finding solutions to brand new problems and make things work when the solution is not straightforward. Responsibilities: Develop embedded Linux firmware for managed Ethernet switches and related networking products; Collaborate with global firmware, hardware, and product teams throughout product design, bring-up, development, and release; Develop and maintain Linux user-space services, management daemons, platform libraries, and hardware abstraction components; Implement and maintain Layer 2 and Layer 3 switching functionality, including VLANs, STP/RSTP/MSTP, LACP, LLDP, multicast, and routing features; Integrate switching silicon SDKs, platform components, and third-party open-source software into the firmware; Improve switching performance, reliability, startup time, resource usage, and system observability; Work with hardware engineers on board bring-up, BSP integration, hardware validation, and low-level issue investigation; Diagnose complex control-plane and data-plane issues using logs, packet captures, hardware counters, tracing, and profiling tools. Requirements: 3+ years of embedded software development experience using C or C++; Strong understanding of Linux internals, including processes, memory management, networking, netlink, and event-driven I/O; Strong knowledge of Ethernet switching and networking fundamentals, including Layer 2, Layer 3, VLANs, bridging, multicast, and routing; Experience developing Linux-based firmware, platform services, system daemons, or networking applications; Experience with Git, Bash, cross-compilation, toolchains, and embedded build systems such as OpenWrt, Buildroot, or Linux From Scratch. Experience with AI tools - Claude, Codex, etc; Fluent in English and Lithuanian. Nice to have: Experience with routing software such as FRRouting or Quagga; Understanding of data-plane processing, hardware offloading, packet pipelines, and performance optimization; Experience with Broadcom SDKs, Intel/Barefoot Tofino, P4, or comparable switching silicon and frameworks; Experience developing data-center, enterprise, or carrier-grade Ethernet switches; Experience with BSP development, Linux device drivers, bootloaders, or hardware abstraction layers; Ability to contribute to system and software architecture across multiple product areas. Benefits: International work environment and work with global development teams; Ability to deliver software that is used by millions of people across the globe; Opportunity to leverage and integrate modern AI tools into product development; Access to all Ubiquiti products; Medical insurance; Hybrid approach - office in Kaunas; Flexible work hours; Compensation package matching global standards, including competitive salary depending on your qualification and background (starting from 3000 up to 7000 Euro gross monthly); A-class office with all the necessities - snacks, drinks, free lunches, free parking, etc!