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Taxfix Group (brands: Taxfix and Steuerbot) is a fintech company solving tax filing for millions of people across Germany, Spain, and the UK. Since 2016, the company has facilitated over €3.5 billion in tax refunds and employs 400+ professionals including tax experts, developers, and security specialists.
As a Staff Software Engineer, you will build core features for the flagship tax-filing product, transforming complex tax scenarios into simple, reliable user experiences. This is a hands-on role where you'll own work end-to-end—from discovery and technical design through implementation, release, monitoring, and iteration. You'll partner with product management, design, and engineering to understand customer problems and deliver measurable outcomes.
Key responsibilities include:
- Partner with cross-functional teams to shape pragmatic solutions and deliver valuable increments
- Own technical outcomes end-to-end, turning ambiguity into action with sound trade-offs
- Contribute to technical direction and long-term product vision
- Use AI-assisted development tools daily to accelerate exploration, implementation, testing, debugging, and documentation while maintaining high engineering standards
- Critically evaluate and validate AI-generated output; share effective practices with teammates
- Improve developer experience through tools, automation, and engineering practices enabling reliable, frequent delivery
- Collaborate across product and platform teams in a learning-focused environment
The role emphasizes a builder-first mindset: staying close to customer problems, moving quickly from idea to impact, and taking ownership of outcomes. You'll work in a cross-functional team with deep expertise in either frontend or backend engineering while collaborating effectively across the stack.
Benefits include 30 annual vacation days, flexible working hours, work-from-abroad allowance (up to 6 weeks/year), employee stock options, free mental health coaching, yoga, monthly service allowance, free tax filing through Taxfix, and dog-friendly office.
REQUIREMENTS:
- Professional software engineering experience with React and Node.js
- Experience designing reliable backend services and APIs
- React Native experience is a plus
- Ability to work effectively across system boundaries and collaborate with engineers outside your primary specialism
- Daily use of AI-assisted development tools with ability to evaluate and troubleshoot AI-generated output
- Experience with public cloud environments (Google Cloud, AWS, or Microsoft Azure)
- Familiarity with DevOps concepts and practices: CI/CD, observability, production operations
- Understanding of core application and backend concepts: authentication, databases, distributed systems, cloud infrastructure, API integrations
- Builder-first, pragmatic approach: turn customer problems into shipped outcomes, test and learn quickly, make clear trade-offs
- Passion for maintainable, elegant code and continuous improvement
- Collaborative, positive attitude with willingness to challenge ideas constructively
- Thrives in environments where things are still taking shape; takes initiative and finds ways to create impact with undefined paths
