Senior AI Product Engineer

About the role

We are looking for a Senior AI Product Engineer to join a product-focused technology team in Barcelona.

This is not a pure AI/ML role. We are looking for a strong end-to-end engineer who can understand real business problems, work directly with users, challenge requirements, simplify complexity, and turn ideas into practical products that deliver measurable impact.

You will be involved across the full product lifecycle: from understanding the problem and shaping the solution, to designing, building, iterating, and taking it to production.

You will work across backend, frontend, APIs, databases, integrations, automation, and AI-enabled capabilities, using technologies such as Python, TypeScript, React, FastAPI, and LLM-based tools where they genuinely add value.

If you enjoy combining product thinking, software engineering, business interaction, and applied AI, this could be a great fit.

What you'll do

Work directly with business teams and end users to understand their challenges, workflows, and real needs

Translate business requirements into simple, effective, and scalable digital products

Design and build end-to-end solutions across backend, frontend, APIs, databases, and system integrations

Develop backend services using Python and frameworks such as FastAPI, Django, or Flask

Build intuitive frontend experiences using JavaScript / TypeScript and React

Design and integrate REST APIs and connect solutions with corporate systems and internal platforms

Automate business processes and repetitive workflows

Apply Generative AI where it creates real value, including LLMs, RAG, embeddings, semantic search, and AI agents

Work iteratively with users, validating assumptions and continuously improving the product based on feedback

Take ownership of solutions from initial discovery through development, deployment, and production support

Make pragmatic technical decisions, balancing speed, simplicity, scalability,



and maintainability

Identify when a simple solution is more effective than a complex architecture

Collaborate with both technical and non-technical stakeholders throughout the product lifecycle

Continuously explore new technologies and propose improvements where they can have a tangible business impact

Must Have

Strong professional experience in software engineering and end-to-end product development

Strong proficiency in Python

Solid experience with JavaScript / TypeScript

Hands-on experience with React

Experience developing backend services with FastAPI, Django, Flask, or similar frameworks

Strong understanding of REST APIs and system integration

Experience working with relational databases

Experience integrating applications with corporate systems or third-party platforms

Ability to work across both backend and frontend when needed

Experience taking software solutions from requirements to production

Strong product mindset and ability to understand the business problem behind the technical request

Confidence interacting directly with business users and technical stakeholders

Ability to challenge, clarify, and simplify requirements

High level of autonomy, ownership, and decision-making capability

Pragmatic problem-solving mindset and focus on business impact

Fluent English

Nice to Have

Hands-on experience with LLM-powered applications

Experience with Retrieval-Augmented Generation (RAG)

Knowledge of embeddings and vector databases

Experience with semantic search

Experience building AI agents or agentic workflows





Experience automating internal business processes

Familiarity with AI APIs and modern GenAI tooling

Experience designing UX for internal tools or enterprise applications

Experience building AI-enabled products rather than purely experimental prototypes

Strong interest in applied AI, automation, and emerging product technologies

Hybrid model – 3 days onsite per week

Why join this project?

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

Build products that solve real business problems from end to end

Combine software engineering, product thinking, and applied AI in the same role

Work across backend, frontend, APIs, integrations, automation, and AI-enabled capabilities

Have a direct impact on how problems are defined and how solutions are designed

Take real ownership, from user discovery to production

Work closely with business users and iterate quickly based on real feedback

€1200 per year training budget and continuous learning opportunities.

Flexible compensation model

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, general events, and strong tech communities

Want to know more about us? Click here and discover all the details.

Curious about our culture? Check out what people are saying about us on Glassdoor.

We know that not every candidate will meet 100% of the requirements. If your profile doesn't match perfectly but you believe you can add value, we'd still love to hear from you.

Ready for the challenge? Apply now!

Empowering People, Unlocking Innovation.

Information Security Notice

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

Compliance with internal security and information protection policies is mandatory.

📌 Senior Ai Product Engineer (España)
🏢 Capitole
📍 España