Senior AI Developer: Build AI Agents & Products

MCI Group; Barcelona; On-site; EUR 70,000 - 90,000; Full time

Job summary

mci group is seeking a Senior Developer to build and ship AI-powered features for back-office and front-office use. You will transform product needs into actionable tasks and work closely with a Product Manager and peers to accelerate delivery.

Expect hands-on development with TS/React (Next.js), Python or C#, and production LLM applications. Azure cloud experience and PostgreSQL data modelling are essential.

Qualifications

• 5+ years building and shipping production software.
• Strong full-stack skills: TS/React (Next.js) and Python or C#.
• Hands-on experience with production LLM applications (RAG, agents, evaluation).
• Cloud experience on Azure and solid PostgreSQL data modelling.

Responsibilities

• Build and ship features and AI agents, taking on the most complex parts.
• Turn product needs into clear, well-sized tasks with the Product Manager.
• Help fellow developers move faster through pairing, code reviews and shared tooling.
• Keep quality high across products, including measurable AI quality (evaluations, guardrails, cost tracking).
• Work in tandem with our DevOps Engineer on CI/CD, infrastructure as code and monitoring.

Skills

TypeScript/React (Next.js)

Python

C#

LLM applications

Azure

PostgreSQL

English fluency

Travel flexibility

Tools

Azure

PostgreSQL

Job description

mci group is seeking a Senior Developer to build and ship AI-powered features for back-office and front-office use. You will transform product needs into actionable tasks and work closely with a Product Manager and peers to accelerate delivery.

Expect hands-on development with TS/React (Next.js), Python or C#, and production LLM applications. Azure cloud experience and PostgreSQL data modelling are essential.