About the job
We are looking for a talented Senior Software Engineer to join our Product, Design, and Engineering organisation and help shape the future of spend management.
You will join our KYC squad , helping build reliable, scalable, and user-friendly experiences for customer onboarding, verification, and compliance. This role is primarily backend-focused, with an expected split of approximately 70% backend and 30% frontend .
You will take ownership of functional and technical topics across the full feature lifecycle, from discovery and specification through technical design, development, testing, documentation, deployment, and maintenance.
As a Senior Software Engineer, you will also help shape the squad's technical direction, lead initiatives, support strong engineering practices, and contribute to a positive and collaborative team culture.
Our stack
- TypeScript (Node/React)
- PostgreSQL for data storage
- Redis, SQS, and Kafka for jobs, messaging, and queues
- Terraform to define our infrastructure
- Kubernetes, Lambdas, and Step Functions to run our applications
- AWS,



GitHub Actions, Claude Code, and LLM-assisted workflows

Key responsibilities
- Design, develop, and maintain reliable backend services and workflows for KYC and customer onboarding.
- Contribute to frontend development with React, representing approximately 30% of the role.
- Own complex technical and functional topics throughout the full feature lifecycle.
- Define and evolve robust architectures, applying principles such as hexagonal architecture and clear domain boundaries.
- Lead technical initiatives from discovery and design through implementation, delivery, and continuous improvement.
- Build maintainable, performant, observable, and well-tested software.
- Collaborate with Product, Design, Engineering, Compliance, Operations, and other stakeholders.
- Use AI-assisted development tools daily, share effective practices, and help promote responsible usage across engineering.

What we're

📌 Senior Software Engineer (Cataluña)
🏢 Spendesk
📍 Cataluña