available for backend roles · madrid, spain / remote

I build backend systems that keep working when things fail.

Backend developer, 2+ years in startups. Python and Java, REST APIs, and event-driven architecture on AWS — queues, dead-letter handling, and async workloads that survive partial failure.

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Experience

Backend Developer

Quixotic feb 2024 — present

Backend work on a multi-tenant SaaS product — keeping each tenant's data isolated while the same services handle all of them.
Designed scalable REST APIs and asynchronous, event-driven flows on AWS for heavy data-synchronisation workloads.
Architected an event-driven system with Amazon SQS and dead-letter queues so failed async work is retried instead of lost.
Secured service access with API Gateway + Cognito, giving cloud-native services a single auth path.
Contributed React components to the product's Next.js frontend — enough to ship a feature end to end.
Shipped faster with AI-assisted tooling (Cursor, Claude Code), holding quality with unit tests.