Software Engineer, User Interface

About the company and the role

At Lendurai, we enable unmanned aerial vehicles (UAVs) to operate independently of global navigation satellite systems and radio control, using computer vision and machine learning. We partner with multiple UAV manufacturers to deliver cost-effective capabilities to public sector and defence customers. Our team has deep experience in aerospace engineering, defence tech, and autonomous systems, with backgrounds at companies like Bolt (EE), Open Cosmos (UK), and Starship Technologies (EE).

Design and build the end-to-end operator experience for our new hand-held Linux-based mission console. You will own the full stack—from interaction design and visual language to performant code running on the device—while integrating seamlessly with Tactical Assault Kit (TAK) and other battle-management systems.

What you will be doing

• Architect the operator journey – Map critical workflows (pre-flight, in-flight, post-mission) into an intuitive, low-latency UI.
• Craft a cohesive visual & interaction language – Deliver wireframes, motion prototypes, and final assets optimised for a high-brightness 1280×800 rugged display and controller-based input.
• Implement the application – Write performant C++14/C99 (or newer) and portable graphics code (preferably Vulkan/OpenGL ES) that runs at 60 fps on an AMD APU. Leverage or extend game-engine UI layers (e.g. Dear ImGUI, Unreal UMG) where appropriate.
• Integrate with mission systems – Consume and visualise UAV telemetry, sensor feeds, and mission data. Exchange situational-awareness data with TAK and other C2/BMS networks (e.g., Cursor-on-Target, Link 16 gateways).
• Prototype & iterate rapidly – Run usability sessions with operators; instrument the app for in-field analytics; refine based on findings.
• Collaborate across disciplines – Work closely with flight-control, autonomy, and simulation teams to ensure fidelity between simulator and live operations.

We are looking for

Required skills:

• Professional experience shipping real-time 3-D applications on constrained or hand-held hardware (game consoles, VR headsets, ruggedised tablets, etc.).
• Fluency in C++14/C99 on Linux; strong grasp of multi-threading, performance profiling, and GPU/CPU memory constraints.
• Track record designing controller- or touch-first interfaces that remain usable under stress and glare.
• Familiarity with at least one cross-platform UI/graphics stack (Unreal, Unity, Qt/QML, Vulkan/OpenGL ES, Dear ImGui).

Nice to have:

• Prior work on TAK, MIL-STD-2525 symbology, Cursor-on-Target, or JTAC tooling.
• Experience building UI for first-person shooters, RTS, or cockpit simulators where spatial awareness and rapid decision-making are paramount.
• Knowledge of HMI standards for defence or aviation.
• Rust, C#, or Flutter for tooling and rapid prototyping.
• Low-level Linux device optimisation: power management, GPU driver tuning, buildroot/Yocto.

Additional Backgrounds That Translate Well

• Console/Hand-held Game UI Lead – shipped titles on Switch, PS Vita, GBA, Android, or similar; deep expertise in fitting rich UX into small, performance-limited form factors.
• Mobile Mapping & GIS Developer – built offline-capable geospatial apps with dynamic layers and real-time overlays.
• Cockpit Avionics HMI Engineer – experience with mission-critical display symbology, pilot workload reduction, and MIL-STD compliance.
• AR/VR Interaction Designer – crafting spatial UIs that balance immersion with fast information retrieval.
• Embedded Infotainment Developer – automotive or marine systems where safety-critical data and media coexist on a single screen.

What We Offer

• Monthly gross salary €4,500-7,000 based on experience and impact
• Stock options
• A mission-driven team that values ownership, curiosity, and a hands-on approach to solving defense challenges
• Early technical influence in a growing defense tech startup
• A focus on outcomes

Join Lendurai to be part of the forefront of defence technology innovation.