Senior Software Engineer - Wallet en Barcelona, España

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 Wallet squad , part of the Payment Groups, helping build reliable, scalable, and user-friendly financial services for finance teams. 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, with https://jobeax.com/link/JSd7UYCSg572jJDY and 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 services for wallet accounts, deposits, balances, cash movements, and payment flows.
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