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# Staff Backend Engineer | AI Fintech Start-up | Remote EU

- **Company:** Oliver Bernard Ltd.
- **Location:** Spain (Remote available)
- **Salary:** €140,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Business Logic, Databases, Continuous Integration, Django Web Framework, Python (Programming Language), PostgreSQL, SQL Databases, Web Application Frameworks, Flask (Web Framework), Backend, Fastapi
- **Published:** October 25, 2026
- **Apply:** https://www.jobleads.com/es/job/staff-backend-engineer-ai-fintech-start-up-remote-eu--spain--e91de2965fb32eb70337ea26325172139

## About the Role

* 5+ years' backend engineering experience (language agnostic)
 * Deep experience with complex business logic products
 * Strong database skills: PostgreSQL, SQL, ORMs, migrations and schema design
 * Experience deploying on AWS (or similar), with solid CI/CD and production-readiness fundamentals
 * Hardcore work ethic and high agency
 * Pragmatic, fast-moving and curious, someone who makes decisions based in reality, not theory
 * Python and a modern web framework (FastAPI, Flask or Django) is a bonus

## Description

I'm working with a VC-backed, rapidly scaling AI-native fintech start-up that is rebuilding the financial system of record for modern businesses. Backed by top-tier US investors, they've grown quickly in a short space of time, serving customers from high-growth companies through to publicly traded enterprises.

You'll be building and shipping end to end: designing backend systems and APIs that run real-time, business-critical accounting logic, owning everything from architecture and CI/CD through to testing and monitoring. The team deploys daily, moves fast and never waits for permission.

We're Looking For

 * 5+ years' backend engineering experience (language agnostic)
 * Deep experience with complex business logic products
 * Strong database skills: PostgreSQL, SQL, ORMs, migrations and schema design
 * Experience deploying on AWS (or similar), with solid CI/CD and production-readiness fundamentals
 * Hardcore work ethic and high agency
 * Pragmatic, fast-moving and curious, someone who makes decisions based in reality, not theory
 * Python and a modern web framework (FastAPI, Flask or Django) is a bonus

Key Info

 * Fully Remote | EU
 * $140k-$250k base + equity
 * B2B or EOR
 * VC-backed | Rapidly scaling | Significant equity ownership
 * High-speed, high-trust environment | Your feedback shapes the product directly