Own one or two product surfaces end to end, including UI, Postgres schema, edge functions, deployment, and post-deployment operationBuild and operate LLM-backed product functionality, including prompts, retrieval, evaluations, cost and latency optimization, and output validationConvert customer objections and call transcripts into shipped productBuild with coding agents and take responsibility for their outputImprove codebase rules, agent skills, and gates that catch problems before human PR reviewTalk directly with recruiter customers to understand what is brokenParticipate in a small-team, fast-decision engineering process using Linear, feature branches, PR review, squash merges, protected main, and deploy-on-mergeCollaborate asynchronously with regular in-person timeRequirementsStrong TypeScript and React fundamentalsShipped full-stack features and operated them, including migrations, auth, deploys, and production debuggingShipped something with an LLM in the critical path and kept it workingExperience working inside a real engineering pipeline with branches, code review, CI, and releasesDaily use of coding agents; ability to explain prompting, reviewing,



and validating agent outputAbility to reason about unfamiliar code and catch plausible but incorrect agent outputAbility to work independently, identify next steps, and ask promptly for missing informationExisting right to work in the EU or EEAEnglish for company communicationFamiliarity with TypeScript, React, Postgres, Supabase, Next.js, Vercel, Linear, Node.js or Python is relevant; not all stack experience is expectedCore CompetenciesDemonstrates expertise in full-stack development with a focus on TypeScript and React, while effectively managing product surfaces and collaborating in a fast-paced engineering environment. Proficient in deploying LLM-backed functionalities and optimizing performance through rigorous testing and validation.Highest-signal resume keywordsTypeScriptReactLLM IntegrationPostgresFull-Stack DevelopmentHard SkillsFull-Stack FeaturesProduction DebuggingMigrationsAuthCI/CDSoft SkillsIndependent WorkProblem-SolvingCommunicationIndustry KeywordsEngineering PipelineCode ReviewDeploymentAgent Output ValidationCustomer CollaborationTools & TechnologiesLinearSupabaseNext.jsVercelNode.jsPython
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📌 AI Engineer – Full-Stack (Barcelona)
🏢 Jobtailor
📍 Barcelona