Embedded Firmware Engineer (Wi-Fi)

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 focused on Wi-Fi. You’ll bring experience, enthusiasm, and creativity to solve brand-new problems, think beyond the obvious, and make things work—even when the solution isn’t straightforward. Responsibilities: Build firmware for new Wi-Fi 6, 6E and WiFi 7 access points and routers; Collaborate with global firmware, hardware, RF, and product teams to deliver cutting-edge wireless networking products; Develop and maintain user-space services and libraries, management daemons, and integrations with hostapd and wpa_supplicant; Integrate third-party components and chipset SDKs into our OpenWrt-based firmware and build systems; Maintain and improve existing product firmware, focusing on stability, performance, security, and maintainability; Work closely with hardware and RF engineers on bring-up, calibration, validation, and issue investigation; Optimize roaming, mesh networking, airtime fairness, OFDMA, MU-MIMO, DFS, automatic channel selection, and QoS/WMM; Diagnose complex laboratory and field issues using logs, packet captures, tracing, and on-device profiling. Requirements: 3+ years of embedded firmware development experience using C or C++; Strong understanding of Linux internals, including processes, memory management, networking, netlink, and event-driven I/O; Solid networking fundamentals, including TCP/UDP, routing, firewalls, and traffic control; Experience with Wi-Fi standards and concepts, including IEEE 802.11 a/b/g/n/ac/ax/be), WPA2/WPA3, EAP, and SAE; Experience with Git, cross-compilation, toolchains, and embedded build systems such as OpenWrt or Buildroot; Experience with AI tools - Claude, Codex, etc; Fluent in English and Lithuanian. Nice to have: Linux wireless or driver experience involving mac80211, cfg80211, NL80211, ath10k; ath11k or mt76; Hands-on experience customizing hostapd, wpa_supplicant, or their control interfaces; Experience with Qualcomm Atheros, MediaTek, or comparable chipset SDKs and board bring-up; Understanding of RF fundamentals, including link budget, SNR, MCS, spectral analysis, regulatory domains and DFS; Experience with 802.11s, EasyMesh, band steering, client steering, or 882.11k/v/r roaming optimization; Experience with Wireshark, tcpdump, radiotap, iPerf3, IxChariot, or automated wireless testing frameworks; Python or Bash scripting experience and familiarity with CI/CD systems. 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!