At ASTEK Iberia, we are looking for a Backend Engineer with a passion for Generative AI to join our fintech partner and help build scalable, secure, and high-performance AI-powered systems.
Bridge the gap between user-facing AI applications and core backend infrastructure by designing and maintaining robust services, GraphQL APIs, and data systems that power next-generation AI solutions on Azure.
OpenAI, Anthropic) into backend services and optimize response latency
Design and develop GraphQL APIs using FastAPI and Strawberry
Architect and maintain relational databases, ensuring performance and data integrity
Collaborate with DevOps/MLOps to containerize and deploy services using Docker and CI/CD tools
Monitor production systems and continuously improve performance, scalability, and cost efficiency
Degree in Computer Science, Software Engineering, or related field
~1–2 years of experience (or strong internships/projects) in backend development or systems engineering
~ Professional working proficiency in English
Python
FastAPI
GraphQL (Strawberry)
SQL & relational database design
SQLAlchemy (or similar ORM)
Docker & CI/CD fundamentals
Monitoring and performance optimization
Secure tool/data integration (e.g., English: fluent (mandatory)
Spanish: fluent (mandatory)
Knowledge of vector databases
Hands-on experience with Azure cloud services
Since 2015, Astek Iberia has been accompanying its customers in their development throughout Spain (Madrid, Barcelona, Valencia, Basque Country, Andalusia, Galicia, etc.).
Founded in France in 1988, Astek is a global player in engineering and technology consulting, present in five continents and 25 countries. With expertise in a wide range of industrial and service sectors, Astek is an essential partner, supporting its customers in an intelligent deployment of their products and services, and in the implementation of their digital transformation.
Today we are more than 8,000 employees, committed every day to promote the complementarity between digital technologies and complex systems engineering.
You will benefit from a personalized follow-up of your professional projects as close as possible to your ambitions.
You will enjoy 23 days of vacation (in addition to holidays) that you will be able to choose whenever you want.
If you want to participate in the process, apply from here attaching your CV (in English) as detailed as possible and we will tell you more.