Software Engineer in Test

Millions of people across Europe want better ways to build long-term wealth, but traditional investing feels complex, inaccessible, or out of reach.

Mintos is solving that. We've built a platform that makes passive income investing simple, transparent, and accessible, and we're expanding fast.

You'll ensure resilience across complex, high-stakes payment flows as we grow to millions of investors. If this is the kind of problem you want to solve, let's talk.

As our Software Engineer in Test, you'll solve the challenge of ensuring reliability, correctness, and resilience across complex, high-stakes payment flows. Your focus will be test automation which means designing automated tests for critical payment journeys, building and maintaining our Cucumber JVM–based automation framework, and validating integrations with banks and payment providers. You'll work with engineering, product, and QA to deliver a Wallet experience that investors can trust with their money and that supports our mission to build Europe’s leading multi-asset investment platform.

You will:

• Design, implement, and maintain automated end-to-end tests for payment flows using Cucumber JVM, Spring, Playwright, and other Java-based tools
• Test critical money-movement scenarios including deposits, withdrawals, internal transfers, and reconciliation
• Own the full test development cycle: BDD scenario design, step definition development, and CI/CD integration
• Apply BDD and contract-first approaches to test integrations with external payment providers, banking APIs, and internal services
• Validate payment state transitions, idempotency, and edge-case behavior (failures, timeouts, partial completions)
• Test compliance with financial regulations such as transaction limits, AML checks, and audit requirements
• Analyze failures, debug flaky tests, and prevent regressions

• 2+ years of experience in test automation or software engineering
• Hands-on experience with Java, automated API testing, and end-to-end testing
• Ability to apply BDD principles and work with Cucumber JVM or similar tools
• Experience with CI/CD pipelines, Docker, and containerized environments
• Familiarity with SQL and ability to test financial data flows and ledgers
• Strong analytical and debugging skills with an understanding of distributed systems
• Ability to write clear, maintainable, purpose-driven test code
• Good level of written and spoken English

Nice to have

• Experience with Gherkin and practical usage of Cucumber JVM
• Background in payments, financial transactions, or banking integrations
• Knowledge of testing asynchronous or event-driven systems (queues, webhooks)
• Knowledge of contract testing tools such as Pact
• Understanding of idempotency testing and distributed transaction patterns

• Competitive salary, starting from 3400 EUR, and stock options.
• Flexibility that fits real life.
• Generous vacation policy.
• An annual €1,200 learning budget to support your professional and personal growth.
• Very well equipped office.