Backend Software Engineer (Core AI)

Goodweek; Madrid; Híbrido; Confidencial; Jornada completa

Descripción de la vacante

A tech-driven company in Comunidad de Madrid is seeking a Software Engineer to shape their core AI framework and lead the development of scalable backend services. The ideal candidate will have over 5 years of experience with Node.js and TypeScript and a solid understanding of AI/ML integrations. The role offers benefits like fully covered health insurance and flexible working hours, within a dynamic environment focusing on innovative product solutions.

Servicios

Fully covered health insurance (100%)

Flexible working hours

Hybrid remote work

Formación

• 5+ years of experience with Node.js and TypeScript stack.
• Experience with AI/ML integration and backend architecture.
• Solid understanding of security best practices.

Responsabilidades

• Shape the core AI framework and backend.
• Build scalable, secure backend services for AI systems.
• Design APIs integrating LLMs and AI workflows.

Conocimientos

Node.js + TypeScript

AI/ML integration

Backend architecture

databases

CI/CD

Technical communication

Descripción del empleo

We're building a next-generation AI tool designed to revolutionize business productivity. Our team of 40 passionate talents spans across France, Spain, and the United States, and our vision is backed by 6 international investment funds.

To accelerate our growth, we're looking for a talented Software Engineer to join our Engineering team and help us build an innovative product that will make a real impact on how thousands of users work every day.

Tasks

You’ll shape our core AI framework and backend, taking full ownership of backend features. You will build scalable, secure and high-performance systems integrating with AI while collaborating closely with product, data and engineering teams.

More specifically, you will:

• Build robust backend services for AI systems (RAG, model orchestration, vector databases)
• Design scalable APIs integrating LLMs and AI workflows
• Ensure security, observability, and performance across our infrastructure
• Automate deployment pipelines, monitoring, and testing
• Participate in architecture and tech stack decisions
• Document and share technical knowledge
• Drive continuous improvement of our AI platform with innovative solutions

Requirements

Technical background

• 5+ years of experience with Node.js + TypeScript stack (NestJS/React)
• Hands-on experience (or strong familiarity) with AI/ML integration (LLMs, RAG, or similar)
• Solid understanding of backend architecture, scalability, and security best practices
• Experience with databases, authentication, and cloud platforms
• Familiar with CI/CD, Git workflows, and agile methodologies
• Bonus: familiarity with other backend programming languages (go, python, ...)

Soft skills

• Strong technical communication
• Agile mindset focused on product and business value
• Ability to document architectural decisions
• Balance between code quality and delivery speed

Technical English required

Benefits

Fully covered health insurance (100%)

Flexible working hours

Hybrid remote work

Daily use of English through close collaboration with teams in the US and France

Contract type: Full-time

Department: Engineering

Start date: As soon as possible

Interested in this opportunity? Don’t hesitate, apply now and join the adventure! 🚀