Senior Full Stack Software Engineer (Typescript / React) – Ai & Llms - Barcelona

Wizeline; Barcelona; Híbrido; EUR 70.000 - 140.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

High-Impact Environment

Professional Development

Flexible and Collaborative Culture

Global Opportunities

Vibrant Community

Total Rewards

Descripción de la vacante

Wizeline busca un Ingeniero Senior Full Stack (TypeScript/React) para trabajar en proyectos de IA y LLMs en España, con opción de remoto y necesidad de presencia en Barcelona. Se valora dominio del inglés y español y experiencia en entornos dinámicos.

El candidato ideal colaborará con equipos multidisciplinarios para entregar soluciones escalables y aprovechar modelos de lenguaje en entornos empresariales.

Formación

• 8+ años de experiencia en desarrollo de software y fundamentos sólidos (estructuras de datos, patrones de diseño, escalabilidad).
• Dominio de TypeScript + React en entornos de producción.
• Experiencia práctica en implementación de LLMs e integración en aplicaciones empresariales.
• Conocimiento profundo de arquitectura de agentes y flujos multiagente.

Responsabilidades

• Desarrollar aplicaciones full stack con TypeScript y React.
• Integrar y optimizar LLMs dentro de soluciones empresariales.
• Diseñar arquitecturas de agentes, memoria, planificación y uso de herramientas.
• Colaborar estrechamente con product managers, ingenieros y equipos de datos para entregar soluciones de alta calidad.
• Adaptarse a entornos dinámicos y cambios de prioridades.

Conocimientos

Software engineering fundamentals

TypeScript + React

LLMs integration

Agent architecture

English + Spanish

Educación

Bachelor’s degree in Computer Science or related field

Descripción del empleo

Descripción del trabajo

Senior Full Stack Software Engineer (TypeScript / React) – AI & LLMs

We are:

Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.

With the right people and the right ideas, there’s no limit to what we can achieve.

Are you a fit?

We are seeking a Senior Full Stack Software Engineer (TypeScript / React) – AI & LLMs to join our team in Spain. This role requires advanced proficiency in both English and Spanish, and availability to attend client offices in Madrid or other locations as needed. Remote work is possible, but candidates must be based in Spain and available at least 3 days per week.

Key Responsibilities

• Full Stack Development: Build scalable applications using TypeScript and React.
• AI Integration: Implement and optimize Large Language Models (LLMs) within enterprise solutions.
• Agent Architecture: Design agentic workflows, including memory, planning, and tool use.
• Collaboration: Work closely with product managers, engineers, and data teams to deliver high-quality solutions.
• Adaptability: Thrive in fast-paced environments and adjust to shifting priorities.

Must-have Skills

• 8+ years of experience in software engineering with strong fundamentals (data structures, design patterns, scalability).
• Bachelor’s degree in Computer Science, Engineering, or related field.
• Advanced English and Spanish proficiency.
• Proven expertise with TypeScript + React in production environments.
• Hands-on experience implementing LLMs and integrating them into applications.
• Strong understanding of agent architecture and multi-agent workflows.

Nice-to-have

• AI Tooling Proficiency: Ability to leverage AI tools for drafting, analysis, or automation.
• Experience in project management within self-organizing teams.
• Familiarity with evaluation frameworks and monitoring AI performance.

What we offer

• A High-Impact Environment
• Commitment to Professional Development
• Flexible and Collaborative Culture
• Global Opportunities
• Vibrant Community
• Total Rewards (benefits vary by location and employment type)

Find out more about our culture here.