Sr. Full-Stack Engineer, AI-Native (Remote LATAM / Europe)

About the role

Reunion Marketing builds the platforms and AI products used by its strategists and automotive dealer clients, including the Altitude Intelligence platform. It is looking for a senior full-stack engineer who uses AI coding assistants as a core part of how they build and ship production code, while still owning quality, security and design. The role is remote and covers client-facing applications, dashboards and reports, and platform and data services.

Key responsibilities

• Own full-stack features end to end, from database schemas and APIs to the front end, built with AI coding assistants and held to production standards for testing, security and multi-tenant data access.
• Build dashboards, reports and tools used daily by dealer clients and internal teams.
• Develop AI-powered features such as chat, report generation and agentic workflows based on large language models.
• Own the engineering practice around AI coding assistants: project context and instructions, custom commands and agents, review conventions and guardrails.
• Ensure quality and testing: automated tests, CI gating and code review, regardless of who wrote the code.
• Own production reliability: monitoring, incident response, performance and rollbacks, with instrumentation before conjecture.
• Make architectural judgments on build versus buy, iteration speed versus client-safe controls, and where AI tooling helps versus where it adds risk.

Required profile

• 6+ years of full-stack software engineering experience, including 1+ year building production software with AI coding assistants as a primary part of the workflow.
• Deep, hands-on experience with AI coding assistants: structuring context for large codebases, writing project instructions and custom commands, running agentic multi-step tasks, reviewing and correcting generated code, and knowing when to write it yourself.
• A feature shipped substantially with an AI coding assistant, with the ability to explain how the work was directed and reviewed.
• Production debugging instincts and a record of owning quality on a multi-team product, including incident response, rolling back a bad release and defending a delayed release to stakeholders.
• Strong written and architectural communication, able to explain technical trade-offs to strategists and executives.

Required skills

• Modern web stack: TypeScript, React, Node.js or Python, and SQL.
• Nice to have: experience with Anthropic Claude (Claude Code, the Claude API, tool use, prompt caching), production LLM features, marketing analytics domain experience, and experience building a system of record.

Hiring process: introductory call, then a technical deep dive covering a production system you built, a production failure you debugged, a release you held back, and an architectural decision. Working session follows.