Senior Front End Engineer, Agentic AI

Roku; Cambridge (MA); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Mental health support

Financial wellness

401(k) retirement

Healthcare coverage

Job summary

Roku is seeking a Senior Agentic AI Engineer to embed intelligent AI capabilities into its platform. You will design autonomous AI agents, reason and plan across pipelines, and deliver efficient, memory-conscious code for embedded environments.

Join the DMTE team to push the boundaries of AI-driven automation for streaming devices worldwide. Prepare to collaborate with firmware, UI, and product teams, leveraging BrightScript and TypeScript to build scalable solutions.

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.
• 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.

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.
• 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.

Skills

TypeScript

Python

LLM orchestration

Prompt engineering

RAG

Autonomous systems

Tools

BrightScript

TypeScript

Python

Job description

Teamwork makes the stream work.

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. Roku pioneered streaming to the TV. 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.

From your first day at Roku, you'll make a valuable - and valued - contribution. We're a fast-growing public company where no one is a bystander. We offer you the opportunity to delight millions of TV streamers around the world while gaining meaningful experience across a variety of disciplines.

About the Team

At Roku, the Device Monetization and Themed Experiences (DMTE) team, a part of the Advertising organization, is where the magic behind the scenes happens. 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. We work in a collaborative, high-trust environment where great ideas can come from anywhere, partnering closely with firmware, UI, and product teams to ensure our platform is lightning fast, reliable, and ready for the next generation of streaming innovation. If you love building the invisible foundations that make great user experiences possible, this is the team for you.

About the Role

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. This is a role for engineers who think in terms of autonomous systems, multi-step reasoning, and tool-use architectures — and who want to fundamentally reshape how a streaming platform is built, maintained, and evolved.

What You'll Be Doing

• 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

We're Excited if you Have

• 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

What are some of the benefits?

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. It's important to note that not every benefit is available in all locations or for every role. For details specific to your location, please consult with your recruiter.

Accommodations

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 [e-mail].

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