Level is looking for a C++ engine engineer who can make engine lean, efficient, and reliable on mobile and other constrained hardware. We are building a larger game and learning platform on a forked version of Godot, and this role focuses specifically on identifying what the engine actually needs for our product, what can be stripped out, and what must be rewritten or optimized so it performs well on lower-powered devices. This is a role for someone who has worked underneath the game/application layer, with experience working inside an engine and changed how it behaves on constrained hardware. What You Will Do: • Get inside our engine and determine what functionality is actually needed for our product, and what can be removed, rewritten, or optimized • Profile and optimize engine and runtime performance across CPU, GPU, memory, binary size, loading time, and (where relevant) battery/power • Modify underlying engine/runtime technology to meet mobile and constrained-hardware requirements • Work on memory allocators and footprint, asset streaming, lazy/asynchronous loading, texture compression, and rendering optimization • Address draw calls, GPU pipelines, shaders, CPU/GPU synchronization, multithreading, and frame pacing • Work with platform graphics APIs (iOS/Metal, Android/Vulkan/OpenGL ES) and debug device-specific problems • Improve startup and load time, binary/package size, and performance across a range of device generations and capabilities • Make architecture and systems design decisions specific to lower-powered hardware constraints • Actively experiment with and adopt AI-assisted development tools to improve engineering workflows Qualifications Need to Have: • Strong professional C++ experience • 7+ years of game engine or runtime experience, including comfort working below the gameplay/application layer • iOS and/or Android shipping experience • Experience with constrained hardware and a strong understanding of mobile hardware limitations • Experience profiling and optimizing for CPU, GPU, memory, loading, asset footprint, binary size, and frame rate • Experience modifying underlying engine or runtime technology (not just building features on top of one) • Experience debugging device-specific problems across different hardware generations • Strong architecture and systems design skills • For candidates from Unity or Unreal backgrounds: demonstrated experience going below the engine's abstractions (e.g., native C/C++ work, IL2CPP, native plugins, or modified engine source), not solely C#/Blueprint-level mobile shipping experience Nice to Have: • Direct experience taking an engine or runtime and stripping down, customizing, or optimizing it for target mobile hardware • Experience with Godot: core contribution, C++ engine development, mobile/platform contributions • Background on a proprietary mobile engine team, where engine internals (memory, rendering, asset systems, platform abstraction, threading) had to be understood deeply • Experience modifying Unreal Engine source itself • Experience with battery/power optimization and low-end device optimization • Curiosity about and hands-on experimentation with AI-assisted development tools