Senior Product Engineer: Full-stack with 80% Backend About Longtail Longtail is building an intelligent decision-streaming platform that helps airlines make smarter, faster commercial decisions in real time. Combining automation, proprietary algorithms, AI, and live data, our technology helps airlines optimize pricing, availability, and product flexibility across thousands of routes worldwide. You'll help build and evolve our new conversational analytics and intelligent alerting product, as it moves from beta to a scalable, production-ready platform.

This is a full-stack role with roughly 80% backend, 20% frontend. A key challenge on this team is building AI-native software customers can trust. Design and build backend services, APIs, and customer-facing capabilities: including conversational analytics, intelligent alerting, reports and saved analyses,



and AI-powered/agentic workflows Integrate with data, analytics, and AI model platforms Contribute to the React frontend when a feature calls for it Improve testing, observability, security, and performance across the platform You're a strong backend engineer who: Has strong API, database, and SQL skills We're a collaborative, distributed team that values transparency, ownership, clear communication, and sustainable ways of working.

Competitive

Package with base + bonus + equity + Benefits (Private health insurance and Pension contribution, Learning and Development budget, Childcare, transport and meal vouchers...).

📌 Design Engineer & Senior Engineer (Cataluña)
🏢 Longtail Technologies
📍 Cataluña