QA Engineer (Internship or Junior) (m/f/d)

mika is revolutionizing financial management for small businesses with an AI-powered platform that combines automated accounting, proactive insights, and conversational AI. We're on a mission to make expert financial navigation and compliance accessible to every small business owner – dramatically reducing costs and bureaucratic burden. We're a small, senior team shipping fast, and every line of code we ship matters.

Our stack: FastAPI & Django backend, React frontend (Material UI, react-query), PostgreSQL, AWS.

We build agentic AI systems that do real accounting work. As our product grows in complexity, so does the need to deeply understand and validate what our AI agents actually do – how they book transactions, why they made certain decisions, and whether the output meets real accounting standards.

This is not a traditional QA role. You'll work closely with the product and engineering team to test new features, investigate edge cases, and build up our QA processes from the ground up. Over time, you'll grow into owning automated testing (E2E) and eventually supporting compliance and certification work.

Concretely, you'll:

• Manually test new features and document findings clearly.
• Clone local environments and run our AI agents to validate their bookkeeping output.
• Develop a deep understanding of German accounting logic to judge whether agent decisions are correct.
• Collaborate with our customer success team and accountants to identify real-world edge cases.
• Gradually build out E2E testing infrastructure (e.g. Playwright).
• Help establish structured QA processes across the team.

• Technical Foundation: You have practical programming experience (in any language) and a dedicated commitment to continuously developing your technical skill set.
• Analytical Mindset: You possess a strong desire to learn and the ability to acquire deep domain expertise in complex subject areas.
• Methodical Approach: You demonstrate structured thinking and ensure thorough documentation of your findings through a systematic workflow.
• Independent Ownership: You are comfortable working autonomously and are proactive in flagging and communicating issues clearly and effectively.

Nice to have:

• Initial experience with automated testing tools such as Playwright, Cypress, or similar frameworks.
• A background or professional interest in accounting, finance, or taxation.
• Prior experience or academic focus in software development.

• A small team of strong, senior engineers who respect each other's time.
• Real ownership from day one – your findings directly shape the product.
• A genuinely interesting domain – German tax law meets AI agents.
• A clear growth path: from manual testing to E2E automation, compliance support, and eventually real software contributions – long-term, this role can grow into a full engineering position.
• Almost no meetings – on average 95% focus time per day.
• Berlin location preferred but remote possible.

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