Group AI Senior Developer

MCI Group; Barcelona; Presencial; EUR 70.000 - 90.000; Jornada completa

Descripción de la vacante

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.

Formación

• 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.

Responsabilidades

• 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.

Conocimientos

TypeScript/React (Next.js)

Python

C#

LLM applications

Azure

PostgreSQL

English fluency

Travel flexibility

Herramientas

Azure

PostgreSQL

Descripción del empleo

We are an independent global marketing communications group with a human‑first approach. We connect strategy, creativity, technology and operations to help brands and organisations grow with purpose. Our global network supports more than 1,200 clients across 34 countries, backed by over 35 years of experience. Under the mci group umbrella, our agencies bring together world‑class talent in strategy, creative development, account leadership, technology, production and research to shape meaningful, lasting impact.

mci group’s AI Team builds AI products for back-office and front-office use, with one ambition: transforming mci group into an AI-powered organisation. We’re looking for a Senior Developer to join us as a hands‑on peer, bridging product and engineering.

What you’ll do

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

What you bring

5+ years building and shipping production software

Strong full-stack skills: TypeScript/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

A collaborative, low-ego approach and a track record of making teams more effective

Fluent English; Spanish or French are strong assets

Able and willing to travel occasionally

Nice to have

Azure AI Foundry agents, Copilot Studio, vector search, AI-assisted development.

mci group is where you can bring your true self to work and be proud of what you do. Join us and make a difference!