3D/XR DEVELOPPER

Kyber; Paris; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Health insurance

Transportation card (50%)

Job summary

Kyber is hiring a senior software engineer to design and develop real-time 3D and XR applications, with a focus on low-latency rendering for visionOS and OpenXR platforms. You will optimize rendering pipelines, work with spatial tracking and sensors, and collaborate across design, product, and systems teams to shape the XR technology strategy.

Based in the Paris area with open remote options in Europe, Kyber values deep technical expertise in graphics, AR/VR, and multi-threaded performance.

Qualifications

• 5 to 10 years of professional software development experience, with focus on 3D/XR systems programming.
• Proven track record on technically complex and critical systems.
• Strong 3DXR reasoning and ability to understand large codebases.
• High level of rigor, autonomy and attention to detail.
• Nice-to-have: open-source XR projects.

Responsibilities

• Design and develop real-time 3D and XR applications and core components.
• Build and optimize XR experiences for visionOS and OpenXR platforms.
• Implement and maintain rendering pipelines with strict performance/latency constraints.
• Work with spatial tracking, world mapping, hand tracking, and device sensors.
• Optimize frame rate, memory usage, and power on XR devices.
• Integrate 3D engines, native SDKs, and platform APIs.
• Debug complex rendering, synchronization, and spatial alignment issues.
• Collaborate with designers, product teams, and systems engineers.
• Participate in architectural decisions and long-term XR strategy.
• Produce high-quality technical documentation and review code at a senior level.

Skills

Real-time 3D

AR/XR development

visionOS knowledge

OpenXR

Rendering concepts

RT performance optimization

C++

Swift/Objective-C

Rust (performance)

Tools

visionOS SDK

OpenXR

Unity

Unreal Engine

Metal

Vulkan

DirectX

AR frameworks (ARKit)

Job description

Salary aligned with the market + typical French benefits (Health Insurance, 50% Transportation card)

About Kyber

Kyber is an open-source SDK and platform to control remote machines, from Remote Desktop to Robots Teleoperation/Teleobservation. Kyber is a multi-stream and multi-actuator transport in extremely-low latency, over the quic protocol.

Clients use Kyber to control robots, drones, desktop, servers in the cloud or just remote rendering of interactive 3D programs. Kyber is done for Remote RealTime, where every millisecond matters.

Kyber is developed by engineers from the VLC and FFmpeg community, and we code in Rust, in C and in assembly. We have some development in Go too.

We’re a quite technical team, but cool to work with.

We are based in Paris area and open to Remote Work in Europe. Full time only.

Role

The successful candidate will be responsible for:

• Design and develop real-time 3D and XR applications and core components
• Build and optimize XR experiences for visionOS and OpenXR-compliant platforms
• Implement and maintain rendering pipelines with strict performance and latency constraints
• Work with spatial tracking, world mapping, hand tracking, and device sensors
• Optimize frame rate, memory usage, and power consumption on XR devices
• Integrate 3D engines, native SDKs, and platform-specific APIs
• Debug complex issues related to rendering, synchronization, and spatial alignment
• Collaborate with designers, product teams, and systems engineers
• Participate in architectural decisions and long-term XR technical strategy
• Produce high-quality technical documentation and review code at a senior level

Required Technical Skills

• Strong background in real-time 3D mathematics (linear algebra, transforms, projections)
• Solid experience developing Augmented Reality / XR applications
• Strong knowledge of visionOS and its spatial computing paradigms
• Practical experience with OpenXR (runtime integration, extensions, cross-device abstraction)
• Deep understanding of rendering concepts (render loops, shaders, GPU/CPU synchronization)
• Experience working under real-time constraints (frame budgets, latency, motion-to-photon)
• Programming languages : C++ / Swift / Objective-C (for visionOS and Apple platforms) / C# (Unity or engine-level tooling) / Rust (for performance-critical or engine-level components, a strong plus)
• Frameworks : visionOS SDK, OpenXR, Unity, Unreal Engine, or custom in-house engines, Metal, Vulkan, or DirectX, AR frameworks (ARKit or equivalent spatial tracking systems)

You

• 5 to 10 years of professional experience in software development, with a significant focus on 3DXR systems programming
• Proven track record working on technically complex and critical systems
• Strong 3DXR reasoning and ability to understand large, existing codebases
• High level of rigor, autonomy, and attention to detail, Strong interest in solving non-trivial technical problems
• Nice-to-Have Skills : Experience with mixed reality or spatial UI design
• Nice-To-Have Skills : Contributions to open-source 3D, XR, or graphics-related projects

Interview Process

• 15-Min Screening Call Quick chat about motivation, fit and answer your non tech questions.
• 2x1-Hour Technical/Product Interview – Deeper dive into your problem-solving approach with our CTO and/or our lead solution architect
• Team Meet & Greet – Informal session to ensure good culture fit.

What We Offer

• Work on cutting-edge XR and spatial computing technologies
• Ownership over technically challenging, real-time systems
• Highly technical and intellectually challenging projects
• An environment that values genuine engineering expertise and that is tech focused (no nonsense meetings or reportings)
• Strong autonomy in technical decision-making