Embedded Wi-Fi Firmware Engineer

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/7 (802.11ax/be) access points and routers;
• Collaborate with global firmware/hardware teams to deliver cutting-edge wireless networking products;
• Develop and maintain user-space services and libraries (hostapd, wpa_supplicant integration, management daemons);
• Integrate third-party components/SDKs (e.g., QCA/MediaTek) into our firmware and build system (OpenWrt-based);
• Maintain and improve existing product firmware (stability, performance, security);
• Work closely with HW/RF engineers on bring-up, calibration, board support, and issue investigation;
• Optimize wireless performance: roaming (802.11k/v/r), mesh/EasyMesh, airtime fairness, OFDMA/MU-MIMO, DFS/ACS, QoS/WMM;
• Diagnose complex field issues using logs, packet captures, and on-device tracing/profiling.

Requirements

• 3+ years of embedded firmware development in C/C++;
• Solid understanding of Linux internals (Process, memory, networking, netlink, epoll);
• Strong networking fundamentals: TCP/UDP, routing (static/dynamic), firewalls (iptables/nftables), traffic control (tc);
• Experience with Wi-Fi stack concepts (802.11 a/b/g/n/ac/ax/be), WPA2/WPA3 security, EAP/SAE;
• Comfortable with Git and typical embedded build systems (OpenWrt/Buildroot, cross-compilation, toolchains);
• Experience with AI tools - Claude, Codex, etc;
• Fluent in English and Lithuanian.

Nice To Have

• Linux wireless/driver experience (mac80211/cfg80211, NL80211); familiarity with ath10k/ath11k/mt76;
• Hands-on with hostapd/wpa_supplicant customization and control interfaces;
• Experience with chipset SDKs (Qualcomm Atheros, MediaTek) and board bring-up;
• RF basics and validation: link budget/SNR/MCS, spectral scan, regulatory domains (FCC/ETSI), DFS certification;
• Mesh networking (802.11s/EasyMesh), band/steering, roaming optimization (k/v/r);
• Traffic analysis/diagnostics with Wireshark, tcpdump, radiotap, iPerf3, IxChariot; automated test frameworks;
• Python/Bash for tooling, CI/CD familiarity, DPI/traffic classification exposure.

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!