---
title: 'Product Engineer, Treasury & Working Capital at Causa Prima'
canonical: 'https://feeny.ai/job/product-engineer-treasury-working-capital-causa-prima-madrid-0zae33jvdjf2'
type: 'job'
last_seen: '2026-10-31'
---

# Product Engineer, Treasury & Working Capital at Causa Prima

- **Company:** Causa Prima
- **Location:** Madrid, Spain
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-26
- **Last confirmed live:** 2026-10-31
- **Apply:** https://jobs.ashbyhq.com/causaprima/da95bcac-462f-4780-8151-3b7b41fe6bf8

## Job description

You'll build products where finance teams set direction and AI agents act on financial data: negotiating early-payment terms, executing approved payments, and reconciling the results. You'll take customer problems through working prototypes to production delivery with engineering. At Causa Prima, we build AI agents that work across company boundaries. Extending a buyer's payment terms changes a supplier's cash position. Paying an invoice early can create value for both. You'll connect those decisions so improving one company's working capital doesn't just move the problem to another. You may have learned this domain in accounting, audit, advisory, or a finance team. Here, you'll turn that knowledge into digital products: speaking with customers, building prototypes, and working with developers to make them reliable.

## What you'll do

- Find the decision behind the dashboard. Work with finance teams to understand how they decide which obligations to meet, how much cash to retain, and when to use financing.
- Make working-capital products usable. Design how agents compare financing options and negotiate early-payment terms on real invoices. Define eligibility, costs, and what happens when an invoice is disputed or paid late.
- Connect forecasts to action. Design how agents detect liquidity gaps, evaluate financing options, and prepare payment plans for approval.
- Follow money through the whole workflow. Shape how agents execute approved payments, track settlement, and reconcile transactions to invoices and accounting records. Investigate the partial payment, missing reference, or stale bank feed that makes a tidy workflow fall apart.
- Prototype, test, and ship. Build prototypes with AI coding tools, test with users, and work with engineering on production delivery.
- Make the limits explicit. Define what agents can do within agreed policies, which actions require human approval, and how users can trace what happened. Measure financing uptake, reconciliation exceptions, and manual work removed.

## What we're looking for

- Finance knowledge earned in practice. You've worked on cash, working capital, payments, or reconciliation in accounting, audit, advisory, treasury, or software. Show us the workflows and exceptions you've handled - credentials alone aren't the bar.
- Working-capital fluency. You understand how receivables, payables, financing, and payment timing affect cash. You can explain who funds the gap when a buyer extends terms. Bring depth in one area and connect it to the others.
- Evidence that you learn by building. You've learned unfamiliar tools to solve real problems and already use AI tools to automate work or build prototypes. Previous product or engineering titles aren't required.
- A bridge from finance to software. You can break a financial process into steps, data, rules, and exceptions a developer can build against. You learn technical concepts quickly and test the result with users.
- Customer-facing analytical judgment. You've investigated client or finance-user problems beyond the first explanation. You can explain financial tradeoffs clearly and change your recommendation when the evidence changes.
- Ownership through delivery. You've managed a project through to an implemented change, kept people aligned, and resolved the awkward details. You can point to what improved after your recommendation became practice.
- Fluent English. Spanish or German is a plus.

This is a wishlist, not a checklist. If the role excites you but you don't tick every box, we would encourage you to apply anyway.

## Nice to have

- Financing implementation experience. You've brought supply chain finance, dynamic discounting, factoring, or invoice financing into actual customer use.
- Banking and accounting integrations. You've worked with bank feeds, payment providers, or ERP reconciliation and dealt with their operational exceptions.
- (Agentic) product experience. You've helped turn a customer problem into a digital product. Experience with agents that act within defined policies and human approvals is a further plus.

## About Causa Prima

## Company Overview
- **One-liner**: Causa Prima operates an agent-to-agent network that automates invoicing, dispute resolution, and payment-term negotiations between buyers and suppliers for finance teams.
- **Entity Type**: Private (Pre-Seed)
- **Headquarters**: Madrid, Spain & Munich, Germany
- **Founded**: 2025 (implied by recent funding and hiring activity in early 2026)
- **Founders**: Maex Ament (CEO), Henrik Gebbing (COO), Philip Stanislaus (CTO)

## Core Business
- **Primary industry**: B2B Fintech / Accounts Payable & Receivable Automation
- **Target customers**: SMB and Enterprise finance teams (buyers and suppliers)
- **Mission or purpose**: To eliminate fixed payment terms (Net-30, Net-60) by enabling AI agents on both sides of a transaction to settle instantly, so money moves on the right terms at the right time automatically.

## Products & Services
- **Causa Prima Network**: A two-sided agent-to-agent network where AI agents handle invoicing, dispute resolution, and dynamic discounting. Buyers and suppliers connect on one platform, removing manual handoffs between AP and AR systems.
- **Scribo (Open Source)**: A free, AI-native e-invoicing tool compliant with EN 16931 (ZUGFeRD/XRechnung for Germany, US plain PDF). Available as an MCP server, Claude/Codex skill, CLI, HTTP API, and web app. Designed to help developers and finance teams generate compliant invoices programmatically.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (pre-seed stage)
- **Key Metric**: $10M in total funding (pre-seed round, announced June 2026)
- **Notable Investors/Partners**: Creandum (led the round), Kfund, HelloWorld, Angel Invest, plus angel investors from Qonto, Pennylane, SAP, ING, SoFi, LIDL, and DeepMind.
- **Growth Signals**: Already trusted by 3,000+ accounts; headcount grew 28.6% monthly (LinkedIn data as of mid-2026); hiring for engineering and product roles in Madrid and Munich; open-source Scribo project gaining traction (12 stars on GitHub).

## Competitive Advantages
- **Two-sided network**: Unlike competitors that automate only one side (AP or AR), Causa Prima connects both buyers and suppliers on a shared network, eliminating the gap between systems.
- **Founder credibility**: Maex Ament invented dynamic discounting and co-founded Taulia (acquired by SAP, processing $50B/quarter). Henrik Gebbing built Finoa to $10B in assets under custody. Philip Stanislaus led 600+ enterprise security audits at Oak Security.
- **Agent-native design**: The platform is built from the ground up for AI agents to negotiate in real time, not just to speed up human workflows.

## Strategic Focus
- **Current priorities**: Grow the engineering and product teams in Madrid and Munich; scale the network beyond 3,000 accounts; push toward eliminating fixed payment terms entirely by making agent-to-agent settlement the default.
- **Direction**: Move from automating existing finance processes to replacing the underlying paradigm of B2B payments (Net-30/60/90) with instant, AI-driven settlement.

## Why Work Here
- **Culture**: Described by founders as a “once-in-a-lifetime opportunity” for people who want to build high-impact infrastructure from scratch. Emphasis on entrepreneurial drive and solving a problem that software has never fully addressed.
- **Remote/Hybrid/Office**: Presence in Madrid and Munich; roles appear to be in-office or hybrid (engineering roles listed in these cities).
- **Notable perks/engineering culture**: Early-stage startup with a small team (6 employees as of mid-2026) — high ownership and direct impact. Tech stack includes TypeScript, GraphQL, PostgreSQL, Redis, Terraform, Kubernetes, and Python. Open-source contributions (Scribo) are a core part of the product strategy. Backed by top-tier VC (Creandum) with strong founder track record.

## Sources
1. [causaprima.ai](https://causaprima.ai/)
2. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/causaprima)
3. [linkedin.com](https://www.linkedin.com/company/causa-prima)
4. [github.com](https://github.com/causa-prima-ai)
5. [techfundingnews.com](https://techfundingnews.com/causa-prima-10m-pre-seed-creandum-b2b-payments-ai-agents-network/)

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