Sr. Fullstack Developer/ AI platform

We are helping our client, a global leader in fraud prevention technology, known for developing one of the most recognized and advanced solutions on the market. Their product addresses complex challenges at scale, combining AI-driven insights, real-time data processing, and deep system integration. The engineering team works with a modern, robust tech stack, solving high-impact problems and delivering secure, scalable solutions to some of the world’s leading financial institutions. It’s a highly collaborative, innovation-driven environment where technology is at the core of the business.

In this role, you will help build a new integrated platform that combines the company’s core cybersecurity tools.You will work in a cross-functional team to design and develop scalable systems, contributing both to backend architecture and fullstack features. This role is ideal for a senior developer who thrives in autonomous environments, is proactive, and brings experience from AI, Big Data, NLP, or machine learning-related projects or companies.

Responsibilities

• Design, implement, and maintain fullstack features end-to-end
• Build and scale data-driven services capable of handling high loads and complex integrations
• Contribute to integrating multiple products into a centralized platform
• Develop and enhance frontend functionality using Micro-Frontend architecture
• Collaborate on DevOps practices and CI/CD pipeline improvements
• Work closely with peers in data engineering, product, and infrastructure

Requirements

• 5+ years of experience in Fullstack or backend-complex SW development roles, with exposure to/ knowledge of front-end
• Experience with large-scale systems or high-load environments
• Strong backend skills in TypeScript, Node.js, and NestJS
• Frontend proficiency with React.js, TypeScript, and Micro-Frontend architecture
• Solid experience working with SQL, Snowflake, or other modern data warehouses
• Familiarity with CI/CD and DevOps methodologies
• Proven background in AI, Big Data, NLP, or machine learning–driven projects or companies

What the Company is Offering

The company offers a great opportunity for professional growth, a competitive salary, and the chance to work alongside top professionals. The company provides a comfortable office space in Barcelona. Stock options are also part of the compensation package, reflecting their commitment to shared success.