Senior Key Account Manager

Barcelona / Limassol / Warsaw / Ta' Xbiex

About the Role

As a Senior Account Manager at Colibrix One, you'll take full ownership of our most complex and strategically important merchant relationships. Beyond managing a larger portfolio, you'll act as a go-to expert within the Account Management team: mentoring colleagues, sharing best practices, and helping raise the standard of client service across the team. This is a senior individual contributor role, ideal for an experienced fintech professional who wants to deepen their impact without moving into formal people management.

Key Responsibilities:

• Own a portfolio of high-value, high-volume, and complex merchants, acting as their trusted advisor and single point of contact across finance, compliance, and operations

• Lead onboarding of complex or higher-risk merchants, including in-depth document review and close collaboration with Compliance on enhanced due diligence

• Handle escalations and sensitive client situations, driving them to resolution and protecting long-term relationships

• Identify growth opportunities within your portfolio (upsell, cross-sell, volume expansion) and contribute to client retention and revenue targets

• Monitor portfolio performance and client health, proactively flagging risks and proposing action plans

• Mentor and coach Account Managers: support them with difficult cases, share knowledge, and help new team members ramp up

• Contribute to training materials, internal playbooks, and onboarding guides for the team

• Act as the voice of the client internally, feeding insights to Product, Compliance, and Operations to shape improvements and new solutions

• Challenge existing processes and lead initiatives that improve efficiency and client experience

• Ensure the client database and account records for your portfolio are accurate and up to date

Your Profile:

• Strong client-first mindset with a track record of building long-term B2B relationships

• Confident communicator, able to negotiate, influence, and hold difficult conversations with senior client stakeholders

• Natural mentor who enjoys helping others grow and sharing expertise

• Strategic and analytical thinker, comfortable working with data to assess portfolio performance

• High level of autonomy: able to manage a complex workload and make sound decisions independently

• Proactive and solution-oriented, with the confidence to challenge established norms

What you need to succeed in this role:

• 2+ years' experience in account management or a similar client-facing role within a regulated entity (payments, banking, or fintech)

• Proven experience managing key or strategic accounts, including complex merchant onboarding

• Solid understanding of payments products, merchant risk, and compliance requirements (KYC/KYB, AML)

• Experience mentoring or informally coaching colleagues is a strong advantage

• Higher education in Business Management, Economics, or a related field is an advantage

• Excellent written communication skills and the ability to explain complex topics clearly

• Fluency in English and Russian (additional languages are an asset)

What We Offer:

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

• A collaborative and supportive team environment

• English / Spanish classes

• Opportunity to receive reimbursement for work-related training/courses

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