Senior Agentic AI Engineer - Embedded UI/Graphics

Roku; Cambridge; Hybrid; GBP 90,000 - 140,000; Full time

Job summary

Roku is seeking a Senior Agentic AI Engineer to join the DMTE team, embedding autonomous AI capabilities into the platform across embedded C++ and UI domains. You’ll design and deploy agentic AI systems that reason, plan, and act, scaling across millions of devices while collaborating with firmware, UI and product teams to deliver fast, reliable experiences.

This role emphasizes building agentic workflows, RAG, function/tool calling, evaluation frameworks, and AI-powered automation to accelerate

Qualifications

• Proven experience building agentic AI systems that generate, optimize, and deliver scalable applications in production environments.
• Strong software engineering foundation with a track record of shipping reliable, performant systems at scale.
• Deep familiarity with modern LLM orchestration tools, prompt engineering techniques, and AI/ML frameworks.

Responsibilities

• Apply strong software engineering principles to design, build, and ship reliable, performant systems at scale.
• Bring rigorous software engineering practices — clean architecture, testing, code review - to building systems that are reliable and performant at scale.
• Apply sound software engineering fundamentals (system design, testing, code review) to ship reliable, performant systems at scale.
• We don't train models, we don't 'fine-tune' LLMs; We build automated agentic processes.
• Design, build, and deploy agentic AI systems that autonomously generate, test, and optimize BrightScript/TypeScript code and UI experiences for the FRAME engine.
• Architect multi-agent workflows (planning, tool-use, retrieval, execution, validation) that accelerate development and reduce manual engineering effort across the team.
• Develop AI-powered automation that understands the constraints of embedded C++ environments and produces performance‑safe, memory‑efficient outputs.
• Build and maintain evaluation frameworks to measure agent reliability, accuracy, and performance in production‑critical contexts.
• Collaborate with cross‑functional teams (firmware, UI, product) to identify high‑impact opportunities for AI‑driven automation and intelligent tooling.
• Stay at the forefront of agentic AI research — including LLM orchestration, RAG, function calling, and autonomous code generation — and bring those advances into our platform.
• Mentor engineers across the team on AI‑first development practices and help establish best practices for human‑agent collaboration.

Skills

Agentic AI systems

TypeScript

Python

LLM orchestration

RAG

function calling

AI frameworks

agent frameworks

embedded C++

software reliability

Tools

Claude Code

Cursor

MCP servers

agent frameworks

Job description

Roku is seeking a Senior Agentic AI Engineer to join the DMTE team, embedding autonomous AI capabilities into the platform across embedded C++ and UI domains. You’ll design and deploy agentic AI systems that reason, plan, and act, scaling across millions of devices while collaborating with firmware, UI and product teams to deliver fast, reliable experiences.

This role emphasizes building agentic workflows, RAG, function/tool calling, evaluation frameworks, and AI-powered automation to accelerate