About the role
Aunque la experiencia profesional y las cualificaciones son principal para este puesto, asegúrese de comprobar si posee las habilidades interpersonales preferibles antes de solicitar, si se requieren.

We are looking for a Senior AI Software Engineer to join an international Artificial Intelligence & Innovation team working on advanced enterprise software solutions in a highly regulated industrial environment.

In this role, you will design, build, and maintain full‑stack applications that combine modern software engineering with applied AI capabilities , including LLM integrations , RAG patterns , agentic workflows , secure APIs , and cloud‑native services .

This is a hands‑on software engineering role with a strong focus on building reliable , secure and scalable applications . You will collaborate closely with teams in Spain and the US , contributing to AI‑enabled products built on top of an existing internal AI core platform .

If you enjoy working across frontend , backend , cloud , and AI‑powered applications , and you are motivated by complex enterprise environments where quality , security , and compliance really matter, this could be a great fit.

What you’ll do

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- Design, develop, support, and maintain enterprise‑grade software applications based on business, engineering, and regulatory requirements

- Build AI‑enabled applications integrating LLMs, RAG patterns, vectorization, and agentic AI capabilities into real business workflows

- Develop scalable backend services and REST APIs using Python to support AI features, product workflows, and enterprise applications

- Design and implement agentic AI applications capable of interpreting context, planning actions, calling tools or services, and automating multi‑step workflows

- Integrate AI capabilities into SaaS‑style applications through secure and robust service layers





- Work with cloud‑native services across Azure, GCP, AWS, or similar environments

- Containerize services using Docker and contribute to CI/CD delivery practices

- Collaborate with product, UX, data engineering, and international engineering teams to deliver end‑to‑end solutions

- Apply secure coding practices, software quality standards, and troubleshooting best practices

- Participate in Agile / Scrum ceremonies and contribute to a collaborative engineering culture

- Provide technical leadership as a senior individual contributor, contributing to architecture, code quality, best practices, and mentoring

Qualifications

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- 6+ years of experience in software development

- Strong proficiency in Python

- Experience building scalable backend services and REST APIs

- Experience with frontend development using Angular, React, Svelte, TypeScript, or similar technologies

- Previous experience building full‑stack or SaaS‑style applications

- Experience integrating LLMs/Generative AI into cloud‑based applications

- Knowledge of modern AI patterns such as RAG, vector search, LLM orchestration, or agentic workflows

- Experience working with cloud environments such as Azure, GCP, AWS, or similar

- Experience with Docker and containerized services

- Good understanding of software architecture, clean code, secure development, and engineering best practices

- Experience working in Agile / Scrum environments

- Strong problem‑solving skills, attention to detail, and excellent troubleshooting mindset





- Fluent in English and Spanish

- Experience building agentic AI systems that integrate with APIs, tools, or external services

- Experience with vector databases such as Milvus or similar technologies

- Database experience with MongoDB and relational databases such as MS SQL or Oracle

- Experience with Kubernetes or container orchestration platforms

- Experience with Azure CI/CD automation or similar CI/CD tools

- Knowledge of data modeling, domain‑driven design, or test‑driven development

- Experience supporting testing activities or improving automated testing practices

Benefits

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- Hybrid model – up to 50% remote work annually

- International collaboration with teams in Spain and the US

- People first – diverse and inclusive culture in an international environment

- Work on applied AI solutions in a real enterprise software environment

- Contribute to full‑stack applications combining frontend, backend, cloud, and AI capabilities

- Be part of an Artificial Intelligence & Innovation team working across Spain and the US

- Join a team where curiosity, ownership, collaboration, and new ideas are highly valued

- High team stability and collaborative culture

- €1200 per year training budget and continuous learning opportunities

- Private health insurance and benefits package

- Flexible working hours and hybrid model

- Wellhub: fitness, wellness, and mental health support

- Football and paddle tennis teams sponsored by Capitole

- Team buildings, global events, and strong tech communities

Information Security Notice

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- The employee will have access to confidential information related to Capitole and the assigned project. xqbhyrx

- Compliance with internal security and information protection policies is mandatory.

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📌 Senior AI Software Engineer | Python & Angular (Madrid)
🏢 Capitole
📍 Madrid