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

Wizeline; Madrid; Híbrido; EUR 80.000 - 110.000; Jornada completa

Descripción de la vacante

Wizeline, a global AI-native technology solutions provider, seeks a Senior Full Stack Software Engineer (TypeScript/React) to join its Madrid-based team. The role focuses on AI & LLM integration, agent architecture, and high-quality software delivery in enterprise environments.

The successful candidate will master both English and Spanish, work across product, engineering, and data teams, and may attend client offices in Madrid or elsewhere in Spain.

Formación

• 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.

Responsabilidades

• 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.

Conocimientos

TypeScript

React

LLMs

English

Spanish

Software fundamentals

Agent architecture

Educación

Bachelor's degree in CS/Engineering

Descripción del empleo

Senior Full Stack Software Engineer (TypeScript / React) - AI & LLMs Wizeline•Madrid, area metropolitana (comarca); comunidad de madrid, Spain

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.