Join COLIBRIX ONE - Innovating the Future of Payments

At

COLIBRIX ONE* , we're building advanced, AI‑powered payment technologies that support Payment Service Providers (PSPs), Electronic Money Institutions (EMIs), and neobanks across the EU and the UK. As a fully licensed Electronic Money Institution (FCA Reference No. 927920) and holder of a Financial Institution Licence issued by the MFSA, as well as a principal member of both VISA and Mastercard, we provide comprehensive, real‑world financial solutions that include:

General card processing

Digital wallet infrastructure

Cross‑border merchant accounts

Alternative payment methods (APMs)

Corporate accounts for legal entities

We're a fast‑growing team with a passion for innovation, security, and scalability. Our culture values curiosity, collaboration, and impact – and we're looking for talented professionals who are ready to shape the future of fintech.

At COLIBRIX ONE, your work directly powers the digital economy. If you're eager to solve meaningful challenges and build with purpose, we'd love to hear from you.

About The Role We are looking for an experienced

Risk Specialist with deep expertise in card acquiring and in managing merchants operating under subscription‑based

(recurring billing) business models. The key area of responsibility will be the design, development, and ongoing monitoring of a system for calculating and tracking VAMP (Visa Acquirer Monitoring Program) rates, as well as managing fraud and chargeback risks.

Key Responsibilities

Build and maintain a VAMP rate calculation system, including methodology, data sources, automation, and reporting.

Assessment of the planned subscription business model from a fraud and chargeback perspective.





Identification of operational and technical risks.

Recommendations for reducing fraud and chargeback ratios.

Review of available mitigation tools and operational approaches, including solutions such as Ethoca and Verifi, which are usually considered part of a broader fraud/dispute management strategy rather than standalone mitigation tools.

Provide operational and monitoring recommendations for:

KPI and threshold monitoring

Fraud ratio tracking

Chargeback ratio monitoring

Operational escalation procedures

Liaise with international card schemes (Visa, Mastercard) on compliance with monitoring programs (VAMP, VDMP, VFMP, ECM, EFM).

Ensure compliance with card scheme requirements for subscription merchants (free trial, negative option billing, recurring transactions).

Mandatory Requirements

3-5+ years of experience in risk management within the acquiring business (bank, PSP, payment facilitator, or processor).

Proven experience working with subscription/recurring billing merchants, including free trial, auto‑renewal, and negative option billing models.

Hands‑on experience building a VAMP rate calculation system (methodology, data sources, validation, reporting).

Deep knowledge of Visa and Mastercard monitoring programs: VAMP, VDMP (Visa Dispute Monitoring Program), VFMP (Visa Fraud Monitoring Program), Mastercard ECM/EFM.

Understanding of the transaction and dispute lifecycle:



authorization, clearing, chargeback, representment, pre‑arbitration, arbitration.

Experience working with Visa and Mastercard reason codes, with a clear understanding of the differences between fraud and non‑fraud disputes.

Knowledge of early warning and dispute prevention tools: Ethoca Alerts, Verifi CDRN, Verifi Order Insight, RDR (Rapid Dispute Resolution).

Strong SQL and Excel skills for working with large transactional datasets.

Understanding of KYC, AML, and merchant underwriting principles in acquiring.

Nice to Have

Experience in international acquiring (cross‑border, multi‑currency).

Experience integrating and configuring anti‑fraud systems (3DS 2.x, device fingerprinting, behavioural analytics).

Knowledge of PCI DSS and card data handling requirements.

Experience with BI tools (Tableau, Power BI, Looker) for building monitoring dashboards.

Experience working with card schemes on remediation programs.

Personal Qualities

Analytical mindset and strong attention to detail.

Ability to work with large datasets and identify patterns.

Proactive approach to risk identification and solution proposals.

Strong structured communication skills with business, operations teams, and card schemes.

What We Offer

Opportunity to shape the future of fintech solutions within a growing company.

Collaborative, horizontal team structure that values your expertise and ideas.

Continuous learning and development opportunities to enhance your skills and career growth.

Competitive salary and benefits package.

This position is offered within the COLIBRIX ONE. Employment will be under the appropriate legal entity based on the role and location.

📌 Risk Specialist (Madrid)
🏢 Colibrix One
📍 Madrid