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:

Global 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 As a

Key Account Manager at

Colibrix One , you’ll play a vital role in building strong, lasting relationships with merchants, collaborating across departments, and driving innovation through a deep understanding of client needs. This is a client-facing, strategic position adecuado for someone who thrives in a fast-paced fintech environment and is passionate about delivering exceptional service.

Key Responsibilities

Manage client onboarding, including gathering and conducting an initial review of documents

Advise our customers regarding products and services

Establish sustainable customer relations

Maintain and update the client database





Act as a single point of contact for the merchant and facilitate dialogue between them and the different departments in finance, compliance, and operations

Anticipate client needs, the challenges they face, and work with the internal team to develop action plans for addressing issues and ideas that drive innovation and best practices

Your Profile

Passion for providing the best client experience

Excellent communication skills, ability to persuade and voice your opinion

Dedicated, motivated, and confident personality driven by personal achievements and accomplishments

Previous experience in client-oriented role in the B2B sector

Strategic and analytical thinking

Ability to prioritize own workload and work with minimum supervision

Ability to challenge established norms and proactively seek improvements and better solutions

What you need to succeed in this role

1+ years’ experience preferably within a regulated entity in a similar role in banking, payments

Higher education: Business management, Economy, or other would be an advantage

Experience working in a fast-paced environment

Excellent written communication skills and ability to convey complex information in a clear, understandable way for the audience

Fluency in English and Russian (proficiency in additional languages is considered 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

Option to work in a hybrid model based on mutual agreement with the direct coordinator

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

📌 Key Account Manager (Madrid)
🏢 Colibrix One
📍 Madrid