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Taxfix is a fintech company that has helped millions of people file taxes confidently and claim refunds. Operating across Germany, Spain, and the UK with over 400 professionals, the company has facilitated €3.5+ billion in tax refunds since 2016.
As a Senior Fullstack Engineer, you'll work hybrid from Stuttgart (Fellbach) or remotely, taking ownership of the continuous development of internal services and tools. You'll substantially shape the build-out of a scalable, future-oriented architecture and infrastructure, expanding CI/CD pipelines and automated testing frameworks. Collaborating closely with product and frontend teams, you'll design and implement impactful new features while actively driving AI-supported development by integrating LLMs for code generation and product features.
You'll explore advanced topics like machine learning, generative AI, and data engineering, contributing to the full lifecycle of brand-new products from inception. The role emphasizes pragmatic problem-solving, data-driven decisions, and a culture where everyone is treated equally and fairly.
You bring strong proficiency in at least one object-oriented or functional language (Java, Kotlin, Scala, Python), with a focus on TypeScript. You're highly proficient with modern AI tooling such as Claude Code, GitHub Copilot, Cursor, or LLM APIs, and actively follow AI trends. You have a passion for writing high-performance, maintainable code and designing complex systems, with a strong desire to dive into new technical territories and continuously develop your skills. You thrive in small, agile teams where your contribution has direct, visible impact.
Taxfix offers 30 annual vacation days, flexible working hours, employee stock options, a generous learning budget, free mental health coaching, yoga, a monthly allowance for services, and the ability to work abroad up to six weeks annually. The company culture emphasizes freedom, creativity, and learning from mistakes.
