Senior AI-Driven Full-Stack Engineer

Braintrust; España; Remote; EUR 70,000 - 120,000; Full time

Job summary

Reunion Marketing seeks a senior full-stack engineer to build across the stack, integrating AI coding assistants like Claude Code into daily workflows. You will own features end-to-end, ensuring security, testing, and data integrity for client-facing dashboards and data pipelines.

The role emphasizes a top-tier production mindset and clear communication of architectural trade-offs. As part of a fast-moving team, you will shape how AI tools augment development, define guardrails, and deliver

Qualifications

• 6+ years of full-stack software engineering experience
• Strong web stack: TypeScript, React, Node.js or Python, and SQL
• Deep hands-on experience with AI coding assistants and prompt design
• Ability to ship production software with AI assistants and review processes
• Ability to explain trade-offs to strategists and executives

Responsibilities

• Full-stack feature delivery from database to front end with production-ready security and multi-tenant access
• Define AI-assisted engineering practices: context, commands, and guardrails
• Develop AI-powered features: chat, reports, and agentic workflows
• Maintain quality with automated tests, CI gating, and code reviews
• Ensure production reliability: monitoring, incident response, and rollbacks
• Provide architectural judgment: buy vs build and risk-aware decisions

Skills

Full-stack development

TypeScript

React

Node.js

Python

SQL

AI coding assistants

Software architecture

Tools

Claude Code

Cursor

GitHub Copilot

Job description

Reunion Marketing seeks a senior full-stack engineer to build across the stack, integrating AI coding assistants like Claude Code into daily workflows. You will own features end-to-end, ensuring security, testing, and data integrity for client-facing dashboards and data pipelines.

The role emphasizes a top-tier production mindset and clear communication of architectural trade-offs. As part of a fast-moving team, you will shape how AI tools augment development, define guardrails, and deliver