Senior Software Engineer C++ UI

Salary: £60,000 - 100,000 per year

Requirements

• Minimum of 5+ years of software engineering experience with a heavy focus on C++ (C++14/17/20).
• Deep understanding of systems programming, including memory management, multi-threading, and hardware-software abstraction layers.
• Experience with graphics APIs such as OpenGL, Vulkan, or proprietary embedded graphics stacks, and rendering pipelines.
• Proficiency in Python for tooling and automation, with a working knowledge of BrightScript or JavaScript as a significant plus.
• Strong root cause analysis skills, using tools such as GDB, Valgrind, or platform-specific profilers.
• Knowledge of AI applications and hands-on experience using generative AI tools to accelerate systems-level development.
• A proactive mindset with a passion for embedded systems performance optimization and data-driven improvement.

Responsibilities

• Architect and optimize core C++ UI frameworks and rendering engines to ensure smooth performance across a range of hardware profiles.
• Lead technical investigations into system-level bottlenecks, memory leaks, and GPU/CPU synchronization issues.
• Develop and maintain low-level graphics APIs and layout systems that support our application ecosystem.
• Integrate AI/ML capabilities at the systems level, leveraging generative AI tools to optimize code generation and automate performance profiling.
• Collaborate with firmware and driver teams to leverage hardware-specific optimizations and ensure seamless integration with the underlying OS.
• Mentor junior developers through code reviews, architectural design sessions, and technical documentation of core systems.
• Drive engineering excellence by implementing advanced debugging tools, automated performance regression suites, and modern C++ best practices.

Technologies

• AI
• Architect
• BrightScript
• Embedded
• Firmware
• Hardware
• Support
• JavaScript
• OpenGL
• Python
• Roku
• UX UI Design
• Backbone
• C++
• LESS

More

We are Roku, the #1 TV streaming platform in the U.S., Canada, and Mexico, with a mission to connect the entire TV ecosystem and power every television in the world. Our UI Systems team builds the high-performance engines and core graphics infrastructure that power millions of devices, working at the intersection of hardware and software in a collaborative, high-trust environment with firmware and silicon teams. This Senior Software Engineer role is ideal for engineers who thrive on low-level systems programming and performance-critical work, and we offer a fast-paced, innovative culture, hybrid working with office collaboration Monday through Thursday and flexible remote Fridays, plus a comprehensive benefits package that may include healthcare, retirement, commuter support, mental health and financial wellness resources, and paid time off based on location.

last updated 34 week of 2026