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.

Role Summary

We’re looking for a Senior IPv6 Engineer to take ownership of IPv6 feature development and integration across our UniFi gateway routers. You’ll design, build, and optimize critical IPv6 networking components that enable secure, reliable, and high-performance connectivity for our global users.

Responsibilities

Design, develop, and maintain IPv6 networking features in enterprise router firmware and software stacks
Ensure seamless IPv4-to-IPv6 coexistence (dual-stack, tunneling, NAT64, DS-Lite, MAP-E, etc.) for enterprise and ISP-grade deployments
Conduct performance tuning, benchmarking, and troubleshooting for IPv6 forwarding, security, and QoS features
Collaborate with product managers and system architects to define the IPv6 roadmap and feature priorities
Work closely with the QA team to suggest test plans, simulations, and automated test environments for IPv6 functionality

Requirements

5+ years of experience in embedded networking software development
Strong hands-on experience with:
IPv6 protocol stack implementation (L2–L7)
IPv6 address management, DHCPv6, SLAAC
IPv6 Prefix Delegation
Experience with varied IPv6 network setups (enterprise, ISP, and mixed environments)
Proficiency in C/C++, with familiarity in Linux-based networking stacks
Excellent problem-solving, analytical, and debugging skills
Strong communication and documentation abilities.

Nice To Have

Experience with IPv6 interoperability testing with ISPs
Experience with IPv6 certification processes (e.g., IPv6 Ready Logo, Hurricane Electric IPv6 Sage, or equivalent)
Familiarity with UniFi platforms

Benefits

Competitive salary and 5 weeks of vacation per year
Discretionary bonuses based on individual performance
Flexible working hours, home office
Top floor office with terrace and amazing view of Prague
Kitchen packed with coffee, food, snacks & sodas, meal allowance, etc.
A collective of developers who want to make the best product. Maximum effort to keep processes to a minimum, no complex reporting and similar habits