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Fullstack Developer (AI-driven & Custom Solutions)
The Key Talent·Madrid, Spain
What they offer
Hybrid
Office and home days — the ad has the split.
What they ask for
Have the right to work in Spain
The Key Talent doesn't mention sponsorship in the ad.
Be near Madrid for hybrid days
No relocation package mentioned.
Have 2+ years of experience
Mid-level role.
Pulled from the advert automatically — the full ad is what counts.
This job was published 4 months ago
About the role
Fullstack Developer (AI-driven & Custom Solutions)
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.
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 will your impact be?
What you'll do
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
What we're looking for
What profile are we 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
What you'll get
What do we offer?
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
How you'll work
Offices in Barrio de Salamanca (Madrid) + 2 remote days and flexibility
About the company & team
What kind of person fits us?
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
Hiring process
Join us
Sign up and let us accompany you in your professional growth.
About the role
Fullstack Developer (AI-driven & Custom Solutions)
Tu futuro con The Key Talent
Sobre nosotros
Somos una compañía tecnológica fundada en 2015 con una misión clara: ayudar al mundo de los Recursos Humanos a adaptarse a un entorno de cambio y transformación constante.
Creemos que el sector necesita evolucionar más rápido, y por eso apostamos por la innovación continua, el desarrollo de soluciones propias y la incorporación real de la inteligencia artificial en los productos.
Desarrollamos soluciones SaaS y, cada vez más, plataformas a medida impulsadas por IA, trabajando con compañías globales en diferentes continentes.
Actualmente estamos en un proceso de transformación tecnológica donde la experimentación, la construcción de nuevos productos y la integración real de capacidades de IA son parte central del camino.
¿Qué necesitamos?
Buscamos un/a Fullstack Developer para incorporarse a nuestro equipo y liderar el desarrollo de proyectos tecnológicos end-to-end para clientes, con un fuerte componente de inteligencia artificial.
Tu rol combinará:
Desarrollo de soluciones a medida desde cero
Participación en proyectos innovadores basados en IA
Evolución y modernización de nuestra plataforma actual
¿Cuál será tu impacto?
What you'll do
Diseñar y desarrollar plataformas personalizadas para clientes, integrando capacidades de IA
Construir soluciones end-to-end: frontend, backend e integración con servicios externos
Experimentar con nuevas herramientas, frameworks y enfoques para acelerar el desarrollo
Participar en la transformación hacia una arquitectura más moderna y escalable
Contribuir a la evolución de nuestros productos SaaS existentes
Asegurar calidad, mantenibilidad y escalabilidad del código
What we're looking for
¿Qué perfil buscamos?
Buscamos un perfil con 2-5 años de experiencia como desarrollador/a Fullstack, que quiera ir más allá del desarrollo tradicional y participar en la construcción de soluciones innovadoras basadas en IA.
Stack, arquitectura y forma de construir
Buscamos una base técnica sólida y una manera de trabajar orientada a producto, velocidad y criterio. La IA no es un extra: forma parte central del rol.
Servicios, APIs y arquitectura
Base backend para construir soluciones escalables y mantenibles.
Experiencia desarrollando APIs REST escalables
Dominio de Python (Django, Django REST Framework u otros)
Experiencia con bases de datos relacionales y NoSQL
Buen criterio en diseño de arquitecturas y servicios
Producto, interfaz y experiencia
Capa frontend moderna, limpia y preparada para evolucionar rápido.
Experiencia sólida con Angular
Conocimientos en TypeScript, HTML, CSS/SCSS
Experiencia en consumo de APIs y arquitectura frontend moderna
Entorno, despliegue y estabilidad
Buenas bases para desarrollar, desplegar y mantener productos con fluidez.
Experiencia con Docker
Conocimientos básicos de AWS o entornos cloud
Familiaridad con CI/CD
AI-first en la forma de trabajar
Este rol no es solo compatible con IA: la inteligencia artificial es parte central del trabajo. Esperamos que utilices herramientas como ChatGPT, Copilot, Cursor, Kiro, Antigravity u otras para acelerar el desarrollo y construir mejor.
Acelerar el desarrollo de nuevas soluciones
Prototipar rápidamente productos para clientes
Mejorar la calidad y eficiencia del código
Explorar nuevas formas de construir software
Tener criterio para validar outputs de IA
Entender sus limitaciones y riesgos
Aplicarla con foco en impacto de negocio
What you'll get
¿Qué ofrecemos?
Salario competitivo acorde a la experiencia
Participación en proyectos innovadores y con impacto real
Entorno donde podrás experimentar con nuevas tecnologías y herramientas de IA
Cultura de ownership, calidad y mejora continua
How you'll work
Oficinas en Barrio de Salamanca (Madrid) + 2 días de remoto y flexibilidad
About the company & team
¿Qué tipo de persona encaja con nosotros?
Buscamos a alguien que:
Disfrute construyendo desde cero y viendo el impacto directo en cliente
Sea autónomo/a, resolutivo/a y con mentalidad de ownership
Tenga curiosidad tecnológica y ganas de aprender constantemente
Se sienta cómodo/a en entornos poco rígidos y en evolución
Quiera participar en un momento de transformación real hacia IA
Hiring process
Únete a nosotros
Regístrate y déjanos acompañarte en tu crecimiento profesional.
You'll most likely need Spanish to apply.This job was automatically translated to English, .
About the company
The Key Talent
HR Tech / Recruiting
View company profile
Spanish company
The Key Talent is a staffing agency.They recruit for client companies, so the employer you would work for is not named on this ad.
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