Product Engineer: Full-stack with 80% Backend

Longtail
Barcelona, Spain
22 days ago
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Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience required
7 years minimum
Working hours
Regular working hours

Tech stack

Application Programming Interfaces (APIs) Artificial Intelligence Databases Distributed Systems Standard Sql ReactJS Backend Build Management Front End Software Development

Job description

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. You’ll own features end to end: understanding customer problems, designing solutions, building and deploying them, and supporting them in production., * Design and build backend services, APIs, and customer-facing capabilities: including conversational analytics, intelligent alerting, reports and saved analyses, and AI-powered/agentic workflows

  • Own features end to end, from customer problem through to production
  • Build reliable, asynchronous workflows with orchestration, error handling, recovery, and observability baked in
  • Integrate with data, analytics, and AI model platforms
  • Design resilient systems that handle failures gracefully
  • Contribute to the React frontend when a feature calls for it
  • Improve testing, observability, security, and performance across the platform
  • Make pragmatic technical decisions as the product evolves, and help shape engineering standards and architecture as we grow

Requirements

We’re looking for someone with 7+ years of engineering experience, including time spent operating production systems, not just shipping them., You’re a strong backend engineer who:

  • Has built and operated production SaaS products
  • Has strong API, database, and SQL skills
  • Understands distributed systems, asynchronous processing, and failure modes
  • Cares about reliability, observability, security, and maintainability
  • Uses AI-assisted development tools such as Claude Code, OpenAI Codex, or similar, while applying strong engineering judgement

Benefits & conditions

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

full_time

Organization Longtail Technologies

About the company

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.

We’re a fast-growing, international team solving complex, real-world problems at scale.

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Good distractions

Talks and stories from around this role — technically off-topic, practically not.

1:38 min

Transitioning into backend engineering from web development

Stefan Lingler Stefan Lingler +1 · Coffee With Developers

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Structuring and scaling the backend engineering team

Stefan Lingler Stefan Lingler +1 · Coffee With Developers

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Exploring the target application for front end tests

Anna Mcdougall · JS Congress

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Database evolution and the funding behind vector databases

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Hiring backend developers with strong cultural fit

Stefan Lingler Stefan Lingler +1 · Coffee With Developers

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Choosing TypeScript for complex backend applications

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