Senior AI Software Engineer in Cambridge

Roku is changing how the world watches TV. Roku is the #1 TV streaming platform in the U.S., Canada, and Mexico, and we've set our sights on powering every television in the world. Our mission is to be the TV streaming platform that connects the entire TV ecosystem. We connect consumers to the content they love, enable content publishers to build and monetize large audiences, and provide advertisers unique capabilities to engage consumers.

We're the engineers who build the high-performance graphics and UI foundations that power the AD Display — the core technology enabling Roku's smooth, responsive, and visually rich experiences on millions of devices worldwide. Our work lives in the middleware and UI layers, and its impact is felt every time a user navigates a menu, enjoys an animated ad, or is wowed by the bespoke experience built to market the latest TV show or movies. We thrive on solving the toughest technical challenges — from optimizing UI rendering to fine-tuning memory usage — using BrightScript (a JavaScript-like language) to deliver rock-solid, high-performance solutions.

As a Senior Agentic AI Engineer in the DMTE team, you'll be the driving force behind embedding intelligent, autonomous AI capabilities into Roku's platform — reimagining how our systems create, optimize, and deliver experiences to tens of millions of devices. Rather than building UI features directly, you'll design and deploy agentic AI systems that reason, plan, and act across our development and delivery pipelines — from automating the generation of themed experiences to enabling self-optimizing rendering workflows within the AD Display.

You'll leverage your years of experience in software engineering and building world-class UI to build AI agents that understand the constraints of embedded, performance-critical systems and operate effectively within them.

At Roku, we don’t just use AI, we work with it. AI agents and smart tools help power drafts, analysis, and repetitive workflows, while our people bring direction, judgment, and accountability. We’re looking for curious, adaptable builders who can show how they’ve used AI or automation to move faster, raise the bar, and scale their impact. We value your AI skills if you have built fluency across the agentic engineering toolchain — coding harnesses like Claude Code or Cursor, MCP servers, custom skills, or agent frameworks. And you can describe projects where you shipped real work with these tools. You know how to drive an agent, verify its output, and ramp on an unfamiliar codebase with an agent helping you.

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.
• 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.

Experience:

• 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.
• Experience with retrieval-augmented generation (RAG), function/tool calling, and evaluation-driven development for AI agents.
• A builder's mentality — you don't just use AI tools, you create autonomous systems that multiply the impact of entire teams.
• Proficiency in TypeScript (or similar languages) and Python for agent development, scripting, and pipeline automation.
• A software engineer's instinct for reliability, testability, and clean architecture — applied to the unique challenges of non-deterministic AI systems.
• Excellent technical communication, root cause analysis abilities, and a proactive mindset with passion for fast iteration.

Hybrid Working:

Roku fosters an inclusive and collaborative environment where teams generally work in the office Monday through Thursday. Fridays are generally flexible for remote work, except for employees whose specific roles or assigned office location require five days' a week attendance.

Roku is committed to offering a diverse range of benefits as part of our compensation package to support our employees and their families. Our comprehensive benefits include global access to mental health and financial wellness support and resources. Local benefits include statutory and voluntary benefits which may include healthcare (medical, dental, and vision), life, accident, disability, commuter, and retirement options (401(k)/pension). Employees are supported in taking time off, in accordance with local leave policies and other personal needs to support their evolving work and life needs.

Roku welcomes applicants of all backgrounds and provides reasonable accommodations and adjustments in accordance with applicable law. If you require reasonable accommodation at any point in the hiring process, please direct your inquiries to EmployeeRelations@Roku.com.