Senior Test Engineer – FinTech UI/API Automation

SIX; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

SIX is advancing its debiX platform to deliver secure, reliable payment capabilities and a top-tier user experience. You will join one of our Scrum teams, developing automated tests and driving quality across UI, API, and mobile components in a regulated fintech context.

In this role, you will collaborate with software engineers, requirements engineers, and product owners to shape testing strategies and ensure robust delivery of features across the platform.

Qualifications

• 6+ years in software testing with API and UI automation experience.
• Strong REST/JSON and SQL querying knowledge.
• Experience testing mobile apps on Android and iOS.
• Familiar with banking/payments/fintech compliance.
• Excellent German communication in cross-functional teams.

Responsibilities

• Develop and maintain automated tests for debiX platform in an agile Scrum team.
• Design and execute UI and API testing strategies to validate system behavior and user journeys.
• Expand and improve test automation to increase efficiency and coverage across releases.
• Take ownership of test processes and contribute to quality strategy across the whole development lifecycle.
• Collaborate with engineers and product owners to identify improvements and optimize testing workflows.

Skills

API testing

UI automation

Mobile testing

REST/JSON

German language

Job description

SIX is advancing its debiX platform to deliver secure, reliable payment capabilities and a top-tier user experience. You will join one of our Scrum teams, developing automated tests and driving quality across UI, API, and mobile components in a regulated fintech context.

In this role, you will collaborate with software engineers, requirements engineers, and product owners to shape testing strategies and ensure robust delivery of features across the platform.