Role: Senior / Principal Software Engineer Sector: Artificial Intelligence Job Type: Full-Time Salary: €80,000–€100,000 +

Todos los posibles candidatos deben leer con atención los siguientes detalles de este trabajo antes de presentar una candidatura.

Equity Contract Type: Direct employment with our client

Location:

Hybrid – Barcelona Language: Fluent Spanish is required Visa sponsorship is not available for this role (Only interested in speaking with candidates who are comfortable working in a hybrid model) Our 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 +5 years of production experience with modern web stack Production experience with Type Script, Java Script, Python or C# Experience with AI coding agents such as Claude Code, Cursor or Codex Real Product mindset and ability to work autonomously Comfortable with Docker,



SQL, testing and scalable architecture Fluent Spanish Nice to have Experience with LLMs, STT/TTS, Open AI, Whisper, Eleven Labs or Deepgram Experience with Lang Chain, Lang Graph or similar AI orchestration tools AWS/GCP, CI/CD and observability experience Startup or early-stage product company experience Previous experince leading a team or acting as a principal What you'll be doing Building scalable APIs and services for real-time voice interactions Developing product features end-to-end with React, Type Script and AI infrastructure Integrating LLM, STT and TTS workflows into production Working on agentic and multi-agent workflows Improving architecture, observability, testing and engineering quality Working directly with the founders and senior team to shape the platform What You Need To Do Next If this role sounds interesting, and you think you have the required experience, please contact me directly.

Email: cristian@ | Follow me Concentric Recruitment is a boutique recruitment firm focused primarly on recruitment for Cloud, Dev Ops and AI Engineering roles. xqbhyrx For the latest jobs and career opportunities follow our Linked In page.

📌 Senior software engineer (España)
🏢 Concentric Recruitment
📍 España