Senior Backend / Platform Engineer
Causa PrimaB2B Payments, company
Madrid, SpainSenior
Creandum
Kfund
HelloWorld
Angel Invest
Software Engineering
About the role
TL;DR
Design and maintain the backend platform for our agents.
- •You'll own the platform our agents run on
- •event-driven architecture, data pipelines, integrations with customer accounting systems, and the infrastructure that makes everything reliable, auditable, and fast.
- •Key Responsibilities Event store
- •Append-only PostgreSQL with tamper-evident hash chaining, real-time event distribution, agent replay and recovery, schema versioning.
- •Cryptographic signature infrastructure
- •Key management, signature verification on all agent events, approval chains for external actions.
- •Workflow Constraint Engine
- •The gateway that verifies authorization before any external action (email, payment, API call) proceeds.
- •Requirements 3+ years experience with Python and/or TypeScript in production. 5+ years designing backend platforms for production systems.
- •Strong systems design skills
- •this is the primary requirement.
- •You think in boundaries, contracts, failure modes, and scaling characteristics.
Required skills
PythonTypeScriptPostgreSQL
Nice-to-have skills
SOC 2GDPR
Domain expertise
fintech
Tech stack
PythonTypeScriptPostgreSQL