Join COLIBRIX.ONE – Innovating the Future of Payments

At COLIBRIX.ONE*, we are 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 EMI (FCA reference number 927920) and a Principal Member of Mastercard, we offer 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 are a fast‑growing team with a passion for innovation, security, and scalability. Our culture values curiosity, collaboration, and impact – and we are looking for talented professionals who are ready to shape the future of fintech.

About the role

We are seeking an experienced Manual QA Engineer with a strong background in fintech and AI‑assisted testing practices. You will be responsible for validating complex payment, wallet, and card flows through manual, API, integration, and regression testing while leveraging AI tools to improve test coverage, speed up analysis, and optimise QA processes.

Tech stack

Python, Playwright, Jira, TestRail/Zephyr/QASE, GitLab, Claude Code, ChatGPT.

Responsibilities

Manual testing across active releases (feature acceptance, smoke testing, regression testing, integration verification)

Testing API flows and validating integrations between services

Creating, maintaining, and optimizing test cases and regression suites in TMS (QASE / TestRail / Zephyr)

Using AI tools to improve QA processes (generating test scenarios, analysing requirements, speeding up exploratory testing,



improving bug reports, assisting with log analysis and impact analysis, accelerating documentation work)

Performing release verification for payments, wallets, cards, crypto flows

Supporting automation QA engineers by validating automated regression results and helping triage failures

Participating in audit‑related QA activities when required

Working with urgent business delivery tasks in fast‑changing environments

Requirements

3+ years in QA, with fintech experience – payments, banking, e‑money, crypto or iGaming

Strong understanding of API testing, client‑server architecture, integration testing, regression testing

Hands‑on experience with Postman / Swagger / Jira / Confluence / TMS (QASE, TestRail, Zephyr)

Practical usage of AI tools in daily QA work

Ability to use AI effectively for test design, exploratory testing, bug investigation, documentation improvement, data generation

Experience writing clear bug reports and structured test documentation

Nice to Have

Experience with SEPA, IBAN, card processing (Visa/Mastercard schemes)

Familiarity with crypto‑to‑fiat flows

Familiarity with PCI DSS

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

Versátil work arrangements to support work‑life balance

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

📌 Manual AI-Assisted QA Engineer (Madrid)
🏢 Colibrix One
📍 Madrid