Senior Backend Engineer, Product-Led Growth & AI

Toast Tab, Inc.; Dublin; Hybrid; EUR 100,000 - 140,000; Full time

Benefits offered by this job

Hybrid work model

In-office 2 days/week (Dublin)

Job summary

Toast is seeking a senior backend engineer to drive end-to-end development of in-product growth experiences, including eligibility, targeting, offer delivery, and conversion tracking.

You will build shared infrastructure, integrate with billing and provisioning systems, and create AI-powered experiences on Toast IQ. This role requires collaboration with product, design, marketing, and data science, with a hybrid model in Dublin.

Qualifications

• 5+ years of software engineering experience building production backend systems in Kotlin, Java, or another object-oriented language.
• Proven ability to own features end-to-end through design, launch, measurement, and iteration.
• Product-minded builder who is comfortable making product calls, launching, and iterating on what customers actually do.
• Experience with experimentation, A/B testing, or growth engineering, and a working understanding of attribution.
• Experience building on LLMs or AI platforms, in production or in side projects.
• Experience building customer-facing features on top of data products such as scores, segments, or recommendations is a plus.

Responsibilities

• Drive end-to-end development of the backend services that power in-product growth experiences: eligibility, targeting, offer delivery, self-serve purchase, activation, and conversion tracking, owning the full lifecycle and iterating on measured outcomes.
• Build the shared infrastructure that makes future experiments cheaper: reusable targeting and eligibility services, campaign configuration, and a purchase flow that new offers plug into.
• Build and evolve integrations with the systems those services depend on, consuming propensity scores and recommended actions, and connecting to billing, contracting, and provisioning systems.
• Build LLM-powered experiences on Toast IQ, from prompt and tool design through evaluation and production monitoring.
• Design experimentation and attribution instrumentation so every launch has a clear measurement story, and use production data to scale or terminate experiences.

Skills

Kotlin/Java backend

End-to-end feature ownership

Experimentation & A/B testing

AI tools & LLMs

Data-driven decision making

Tools

Claude

Cursor

MCP servers

Toast IQ

Job description

Toast is seeking a senior backend engineer to drive end-to-end development of in-product growth experiences, including eligibility, targeting, offer delivery, and conversion tracking.

You will build shared infrastructure, integrate with billing and provisioning systems, and create AI-powered experiences on Toast IQ. This role requires collaboration with product, design, marketing, and data science, with a hybrid model in Dublin.