Job Description

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.

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

Company offers

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
A-class office with all the necessities - snacks, drinks, free lunches, free parking, etc!