The English-language job board for Spain

Fullstack Developer (AI-driven & Custom Solutions)

Remote, Madrid·Added 6 months ago (last checked 22 Oct)

Agency

The Key Talent

13 open roles

Apply

Our summary

Work mode: Remote (Madrid)
Experience: 2+ years

Visa options

The ad doesn’t mention sponsorship
Not a refusal, but not a yes. Worth asking in your first message.

Find jobs with visa support

Skills

Nice to have

CI/CD

This job advert was originally written in Spanish.

Requirements

What we're looking for

We are looking for a profile with 2-5 years of experience as a Fullstack Developer, who wants to go beyond traditional development and take part in building innovative AI-based solutions.

Stack, architecture, and how we build

We are looking for a solid technical foundation and a product-oriented way of working, with speed and good judgment. AI is not an extra: it is a core part of the role.

Services, APIs, and architecture

Backend foundation for building scalable and maintainable solutions.

Experience developing scalable REST APIs

Proficiency in Python (Django, Django REST Framework, or others)

Experience with relational and NoSQL databases

Good judgment in designing architectures and services

Product, interface, and experience

Modern, clean frontend layer ready to evolve quickly.

Solid experience with Angular

Knowledge of TypeScript, HTML, CSS/SCSS

Experience consuming APIs and modern frontend architecture

Environment, deployment, and stability

Solid foundations to develop, deploy, and maintain products smoothly.

Experience with Docker

Basic knowledge of AWS or cloud environments

Familiarity with CI/CD

AI-first in the way we work

This role is not just compatible with AI: artificial intelligence is central to the work. We expect you to use tools like ChatGPT, Copilot, Cursor, Kiro, Antigravity, and others to accelerate development and build better.

Accelerating the development of new solutions

Rapidly prototyping products for clients

Improving code quality and efficiency

Exploring new ways to build software

Having the judgment to validate AI outputs

Understanding their limitations and risks

Applying AI with a focus on business impact

Nice to have

What kind of person fits our team?

We are looking for someone who:

Enjoys building from scratch and seeing direct impact on clients

Is autonomous, resourceful, and has an ownership mindset

Is curious about technology and eager to keep learning constantly

Feels comfortable in flexible, non-rigid environments that are constantly evolving

Wants to be part of a real transformation toward AI

Pay & benefits

What you'll get

Competitive salary commensurate with experience

Participation in innovative projects with real impact

An environment where you can experiment with new technologies and AI tools

A culture of ownership, quality, and continuous improvement

Offices in Barrio de Salamanca (Madrid) + 2 remote days and flexibility

The role

Fullstack Developer (AI-driven & Custom Solutions)

What do we need?

We are looking for a Fullstack Developer to join our team and lead end-to-end technology projects for clients, with a strong focus on artificial intelligence.

Your role will combine:

Developing custom solutions from scratch

Participating in innovative AI-driven projects

Evolving and modernizing our current platform

What you'll do

What will your impact be?

Designing and developing custom platforms for clients, integrating AI capabilities

Building end-to-end solutions: frontend, backend, and integration with external services

Experimenting with new tools, frameworks, and approaches to accelerate development

Participating in the transition toward a more modern and scalable architecture

Contributing to the evolution of our existing SaaS products

Ensuring code quality, maintainability, and scalability

Hiring process

Join us

About The Key Talent

The Key Talent is a Madrid-based HR tech and recruiting company that specializes in connecting businesses with specialized talent, particularly in technology and engineering sectors. The company operates as a talent acquisition partner for companies across Europe and Latin America, combining traditional recruiting expertise with AI-driven software development capabilities to serve clients in industries such as oil & gas, technology, and SaaS.

With its headquarters in Madrid, The Key Talent has a strong presence in Spain's tech and recruitment ecosystem. The company offers opportunities for international professionals through roles in software development, AI engineering, and business development, with a focus on innovation and digital transformation. Their work culture emphasizes collaboration and technical excellence, making them a relevant option for tech talent looking to relocate to Spain.

Industry: HR Tech / Recruiting
Website: thekeytalent.com

In their own words

About the company & team

Your future with The Key Talent

About us

We are a technology company founded in 2015 with a clear mission: to help the world of Human Resources adapt to an environment of constant change and transformation.

We believe the sector needs to evolve faster, and that's why we bet on continuous innovation, the development of proprietary solutions, and the real integration of artificial intelligence into products.

We develop SaaS solutions and, increasingly, custom platforms powered by AI, working with global companies across different continents.

We are currently in a process of technological transformation where experimentation, building new products, and the real integration of AI capabilities are central to our path.

All open roles at The Key Talent