You will design and build the System Integrity Layer, establishing foundational primitives that ensure every agent action is isolated, attributable, and verifiable. This hands-on role involves building tamper-resistant event systems and execution models for autonomous agents handling real-world financial transactions, moving security from a bureaucratic process to a core system property.
Platform Security Engineer at Causa Prima
Causa Prima is building the agent-to-agent network for B2B finance, and they are looking for a Platform Security Engineer to ensure autonomous agents can handle real money safely at scale. Backed by a $10M pre-seed led by Creandum and founded by veterans from Taulia and Finoa, this is a chance to build a "System Integrity Layer" where security is a core architectural property rather than a bureaucratic afterthought. If you have 5+ years of distributed systems experience and an adversarial mindset, join this elite team in Madrid or Munich to define the future of verifiable, agentic finance.
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Location
Madrid, Spain or Munich, Germany
Compensation
Not Disclosed
Company
Causa Prima
Role overview
Enterprise, Software, FinTech, Finance1-10 employees
$90T moves via “duct-taped” workflows. Causa Prima is ending that. We’re building the first agentic AI network for finance: autonomous agents that negotiate and act, not just dashboards. Our founders built 10 startups and 2 unicorns ($400M+ raised). We’re replacing dead software with a self-operating network and a compounding data moat. If you want to build the future where AI makes financial decisions with judgment, join us.
What you will do
- Engineer a System Integrity Layer that governs how autonomous agents interact, ensuring all actions are isolated, attributable, and deterministic.
- Build append-only, tamper-resistant event systems that allow for complete reconstruction of system states without relying on external audit frameworks.
- Execute continuous offensive testing and red teaming to identify flaws in isolation boundaries and cryptographic verification within a multi-tenant infrastructure.
Who this is a fit for
- Has 5+ years of experience designing production backend platforms, distributed systems, and deep database schemas including Row-Level Security and event-sourcing.
- Demonstrates expertise in security architecture, including encryption models, key management, and policy-as-code using tools like Cerbos, OPA, or Cedar.
- Possesses an adversarial mindset and deep knowledge of securing mission-critical enterprise software, preferably within regulated fintech or banking domains.
Why this role is remarkable
- Lead the security architecture for a pioneering agent-to-agent network handling mission-critical B2B financial transactions at scale.
- Join a high-caliber founding team that built platforms processing $50B in volume at Taulia and $10B in assets under custody at Finoa.
- Work in a high-autonomy environment with a $10M pre-seed backing from top-tier investors including Creandum, K-Fund, and HelloWorld.
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I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
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Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Causa Prima wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.