Build the backend foundations for Spendesk’s AI-native experiences
Spendesk is looking for a Backend Software Engineer (IC3) to join our PDE (Product, Design & Engineering) organization and help shape the technical foundations of our next generation of AI-powered product experiences.
This is a hands-on role for an engineer who combines strong backend fundamentals with solid fluency in LLM-enabled systems. You will work on the technical foundations behind conversational and agentic experiences: backend services for context handling, orchestration, tool calling, and reliable interactions with LLMs and applicative systems.
About The Role
As a Backend Software Engineer (IC3), you will help create the backend layer that supports agentic and conversational experiences for Spendesk end users.
Your Scope Will Include Services That:
- manage conversations and contextual state,
- support the ingestion and retrieval of rich content such as PDFs and images,
- integrate LLMs through AWS Bedrock with robust operational patterns,




- connect to MCP-compatible services and tools exposed by other squads,
- orchestrate multi-step workflows combining reasoning, tool usage, and product actions.

This is not just about integrating services’ features to an LLM. You will build production-grade services that need to be reliable, observable, secure, and designed for long-term extensibility. You will contribute to reusable patterns and collaborate with ML Engineers, Product Managers, Designers, and applicative squads to make these foundations useful across multiple AI use cases.
Our tech environment
You’ll operate in a modern engineering environment designed for both product delivery and AI integration:
- TypeScript
- Node.js for backend and banking applications
- React on the frontend
- PostgreSQL for data storage; Redis, SQS, and Kafka for jobs, queues, and event streaming
- Terraform to define infrastructure as code
- Kubernetes, Lambdas, and Step Functions to run our applications
- AWS as

📌 Software Engineer AI (España)
🏢 Spendesk
📍 España