35039 backend developer English-speaking jobs in Spain

  • UpstartBar
  • avila
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
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  • UpstartBar
  • santander
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
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  • UpstartBar
  • oviedo
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
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  • UpstartBar
  • guadalajara
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
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  • UpstartBar
  • bilbao
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • castilla la mancha
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • navarra
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • elche
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • pamplona
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • girona
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • huesca
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • donostia san sebastián
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • cartagena
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • oña
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • orense
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • santiago de compostela
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • barcelona
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • jaén
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • lugo
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
  • UpstartBar
  • zaragoza
  • April 24
contribute to impactful projects and work closely with a talented and passionate team.Job Title: AI Developer ... with agentic systems, vector databases, AI memory implementations, or task routing logic.Background in developer ... sees product quality and infrastructure quality as two sides of the same problem.What you’ll do:Build backend ... improve systems as they grow—no handoffs, no silos.What you bring:Strong experience building and scaling backend ... scratch—APIs, pipelines, orchestration, storage.Own full-stack workflows: light front-end (React, Next.js) to backend
report non-english
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