Senior Software Engineer
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Role: Senior / Principal Software EngineerJob Type: Full-TimeContract Type: Direct employment with our clientLocation: Remote in SpainLanguage: Fluent Spanish is requiredVisa sponsorship is not available for this roleOur partner is building next-generation AI-driven communication products that help businesses automate customer interactions, improve operational efficiency and generate actionable insights in real time.
They are now looking for a Senior/ Principal Software Engineer to help scale the platform behind their voice agents, owning features end-to-end across their Type Script / Python stack and working on AI pipelines, LLM orchestration, STT/TTS, prompt workflows and real-time systems.
What we are looking for +7 years of production experience with modern web stackExperience with AI coding agents such as Claude Code, Cursor or CodexReal Product mindset and ability to work autonomouslyComfortable with Docker, SQL, testing and scalable architectureFluent Spanish Nice to have Experience with LLMs, STT/TTS, Open AI, Whisper, Eleven Labs or DeepgramExperience with Lang Chain, Lang Graph or similar AI orchestration toolsAWS/GCP, CI/CD and observability experienceStartup or early-stage product company experiencePrevious experince leading a team or acting as a principal What you'll be doing Building scalable APIs and services for real-time voice interactionsDeveloping product features end-to-end with React, Type Script and AI infrastructureIntegrating LLM, STT and TTS workflows into productionWorking on agentic and multi-agent workflowsImproving architecture, observability, testing and engineering qualityWorking directly with the founders and senior team to shape the platform #J-*-Ljbffr
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