Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. Because our technology is purpose‑built for restaurants, by restaurant people - and increasingly shaped by AI in both what we build and how we build - restaurants can trust that we’ll deliver on their needs for today while investing in the experiences that will power their restaurant of the future.
AI Foundations is Toast’s internal platform team for AI. We build the infrastructure, governance, and developer tooling that makes AI a reliable, scalable force multiplier across the entire product development lifecycle. Our products include the LLM Proxy, AI Key Management, Observability pipelines, the Claude Plugin Marketplace, and autonomous agents that participate directly in the software development lifecycle.
As a Senior Software Engineer on this team, you’ll be hands‑on building full‑stack across the systems other Toast engineers depend on every day: the LLM proxy, agentic workflows, and the plugin marketplace that brings AI‑native development practices to teams across the company.
Responsibilities
Design, build, and ship features across AI platform infrastructure, including the LLM proxy, AI key management, and observability pipelines
Develop and extend autonomous agents that participate in the SDLC, such as the AI Review GitHub App and Developer Platform MCP integrations
Build on and contribute to the internal plugin marketplace, developing plugins that encode Toast’s architectural standards and quality practices into AI assistant behavior
Implement MCP (Model Context Protocol) services and service templates that make it faster and easier for teams across Toast to build AI‑powered workflows
Contribute full‑stack across backend services and frontend or developer‑facing interfaces as needed
Write high‑quality, well‑tested code and participate in design and code reviews
Partner closely with product management to shape feature requirements, contribute to roadmap discussions, and translate product vision into reliable technical solutions
Requirements
5+ years of experience designing and implementing scalable software systems, with a full‑stack background spanning backend services and frontend or developer‑facing interfaces
Demonstrated experience building, deploying, or operating LLM‑powered agents or AI‑assisted developer tooling
Familiarity with AI coding assistants (e.g., Claude Code, Cursor, GitHub Copilot) and an interest in extending them through custom plugins, skills, or hooks
Experience with MCP (Model Context Protocol), tool use patterns, or agentic frameworks
Working knowledge of prompt engineering and how LLM behavior responds to context and instructions
Strong foundation in modern backend (Java, Kotlin, or similar) and frontend (TypeScript, React, or similar) technologies
Experience with distributed systems, REST APIs, and cloud‑native infrastructure
Strong customer empathy and a drive to make developers’ lives better through reliable, well‑designed platform solutions
What will make you stand out
Familiarity with A2A (Agent‑to‑Agent) protocols and multi‑agent orchestration patterns
Experience with machine learning concepts, model evaluation, or ML infrastructure
Experience building developer experience platforms, internal tooling, or API gateways
Familiarity with observability tooling for AI/LLM systems (e.g., Langfuse, DataDog)
Our Total Rewards Philosophy
We strive to provide competitive compensation and benefits programs that help to attract, retain, and motivate the best and brightest people in our industry. Our total rewards package goes beyond great earnings potential and provides the means to a healthy lifestyle with the flexibility to meet Toasters’ changing needs. Learn more about our benefits at https://careers.toasttab.com/toast-benefits.
For roles in the United States, it is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
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