Embedded Firmware Engineer (Wi-Fi)

About Ubiquiti

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!