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NVIDIA·Software Engineer·Technical Phone Screen·Intermediate

Intermediate
Apr 2026

Summary

Interviewed for a SWE role at Nvidia and got asked about ray tracing experience. Pretty niche question that felt more like a conversation starter than a deep technical dive.

Questions Asked (1)

Q1

What experience do you have with ray tracing in video games?

Technical Trade-offsSystem Design
Author's notes

Made sense given it's Nvidia, but I still fumbled a bit trying to connect my background to something this specific.

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AI HintsAI Generated

Suggested Approach

Start by summarizing your hands-on experience with ray tracing APIs and techniques, then dive into a specific project where you made technical trade-offs between ray tracing and rasterization. Highlight your understanding of NVIDIA's RTX technologies and how you optimized for performance and quality.

Pro tip: Demonstrate awareness of the hybrid rendering approach used in modern games, and discuss how you balance ray tracing effects with traditional rasterization to maintain performance. Mention specific NVIDIA tools like Nsight or RTXDI to show familiarity with their ecosystem.

1. Overview of Experience

Briefly state your overall experience with ray tracing, including APIs (e.g., DirectX Raytracing, Vulkan Ray Tracing) and platforms. Mention the types of ray tracing effects you've implemented (e.g., reflections, shadows, global illumination).

2. Specific Project Example

Choose one project and describe the context: the game's requirements, target hardware, and performance goals. Explain why ray tracing was chosen and what challenges you faced.

3. Technical Trade-offs

Discuss the trade-offs you made, such as quality vs. performance, and how you decided which effects to ray trace. Mention techniques like denoising, adaptive sampling, or hybrid rendering.

4. Optimization and Results

Describe how you optimized the ray tracing implementation, including any NVIDIA-specific optimizations (e.g., using RT Cores, DLSS). Quantify the results (e.g., frame rate improvements, visual quality gains).

5. Lessons Learned and Future Directions

Summarize key takeaways and how you stay updated with advancements in ray tracing. Express enthusiasm for pushing the boundaries of real-time ray tracing, especially in the context of NVIDIA's innovations.

Key Points to Mention

  • DirectX Raytracing (DXR) or Vulkan Ray Tracing API experience
  • Hybrid rendering: combining rasterization with ray tracing for performance
  • Denoising techniques (e.g., SVGF, DLSS) to maintain image quality at low sample counts
  • NVIDIA RTX technologies: RT Cores, DLSS, RTXDI, Nsight tools
  • Performance optimization: reducing ray count, using acceleration structures (BVH), and asynchronous compute
  • Trade-offs between different ray tracing effects (e.g., reflections vs. shadows) based on visual impact and cost

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.