Senior Software Engineer, AI Agent Platform & Tools

Toast; Ireland; On-site; EUR 100,000 - 140,000; Full time

Benefits offered by this job

Peer recognition programs

Unlimited Vacation

Sabbatical after five years

Professional Development Reimbursement

Wellness stipend

401(k) and matching

Medical, Dental, & Vision coverage

Mental Health benefits

Back-up childcare support

Job summary

Toast is seeking a Senior Software Engineer for its AI Agent & Experience team, an internal platform group that builds AI infrastructure, governance, and developer tooling across the product lifecycle.

The role focuses on the LLM proxy, agentic workflows, and a plugin marketplace that enables AI-powered development at Toast. You will contribute to scalable backend services and collaborate with cross-functional teams to improve developer velocity.

Qualifications

• Bachelor’s degree or equivalent in a computing-related field.
• Experience designing scalable backend services and platforms.

Responsibilities

• Build and operate LLM proxy, agentic workflows, and plugin marketplace.
• Write high-quality, well-tested backend code and review designs.
• Collaborate with product managers and platform teams to meet developer needs.

Skills

LLM-powered agents

Agentic workflows

Backend services

REST APIs

Cloud-native

MCP protocol

A2A protocols

Developer tooling

Observability tooling

Java/Kotlin

AI coding assistants

Distributed systems

Education

Bachelor’s Degree

Job description

Toast is seeking a Senior Software Engineer for its AI Agent & Experience team, an internal platform group that builds AI infrastructure, governance, and developer tooling across the product lifecycle.

The role focuses on the LLM proxy, agentic workflows, and a plugin marketplace that enables AI-powered development at Toast. You will contribute to scalable backend services and collaborate with cross-functional teams to improve developer velocity.