Senior Backend Engineer - .NET Core (d/f/m)
Taxfix.com
Office
Madrid
Full Time
Our Story:
Every year millions of people are either filing their taxes in fear or giving up on their tax refund altogether. We're working on fixing that. Our intuitive app enables anyone, regardless of education or background, to file their taxes with newfound confidence.
Spread across Germany, Spain and the UK, the team at Taxfix Group with its brands Taxfix, Steuerbot and TaxScouts, is a compassionate group of solution-finders. We speak our minds openly, and with over 400 professionals, including tax experts, developers, and IT security experts, we're rich in ideas and voices. The group has facilitated more than 3.5 billion euros in tax refunds for its customers since its founding in 2016.
Your Challenge:
In this role, you’ll be one of the backend technology specialists at Taxfix, mainly working on our Spanish product. This is an excellent opportunity for a quality-minded software developer to have a significant impact on the systems, processes and tools driving a rapidly growing product.
You’ll join a cross-functional product team of engineers and designers. You’ll write and ship high-quality code, all while getting up to speed with the needs of the business. You’ll also need to proactively collaborate with multiple teams to get the wider company’s ideas into the actual product.
The Taxfix Group is in an exciting next phase of growth. You'll play a pivotal role in evolving our Spanish product into the go-to solution for individuals and small businesses. You'll tackle challenges unique to the Spanish tax landscape and help us scale our services to a broader audience.
Your Responsibilities And Decisions:
- Write and ship consistently high-quality code to meet product requirements.
- Take pride in and responsibility for your work, from initial development to post-release.
- Proactively seek to understand business and technical requirements, offering your own suggestions and ideas where possible.
- Provide considerate and constructive feedback on your teammates’ work, and receive the same.
- Collaborate with marketing and customer support teams to help company-wide initiatives.
- Contribute to the culture of customer-focused product development across the company and group.
Your Profile:
- You are proficient with .NET Core in C# - we use .NET 8, and upgrade with LTS releases.
- Quality and testing are at the top of your mind, and you understand why provable confidence in your own (and others) work is important, through unit, integration and other kinds of automated testing.
- You have professional experience of building robust and scalable APIs.
- You’re familiar with software development processes, tools and concepts, such as Agile, Kanban, Git, CI/CD, DevOps etc.
- Any specific experience with Azure DevOps, Azure SQL, Azure Event Hub and/or React would be a bonus!
- You are curious, proactive, approachable and collaborative.
- You have strong communication skills, both in English (the language of the company) and Spanish (the language of the product).
- You take the technical lead in projects you are part of, and own them from beginning to end.
Why Taxfix?
- A chance to do meaningful, people-centric work with an international team of passionate professionals.
- Holistic well-being with free mental health coaching sessions and yoga.
- A monthly allowance to spend on an extensive range of services that you can use and roll over as flexibly as you like.
- Employee stock options for all employees—because everyone deserves to benefit from the success they help to create.
- 30 annual vacation days and flexible working hours.
- Work from abroad for up to six weeks every year. Just align with your team, and then enjoy your trip.
- Plenty of opportunities to socialise as a team. In addition to internal tech meetups, our international team hosts regular get-togethers—virtually and in person when possible.
- Free tax declaration filing, of course, through the Taxfix app—and internal support for all personal tax-related questions.
- Have a four-legged friend in your life? We’re happy to have dogs join us in the office.
Excited? So are we. Learn more about Team Taxfix on our blog and get a glimpse of our culture.
At Taxfix, we believe that incredible things happen when you have a wealth of perspectives and experiences. We're proudly committed to equal employment and development opportunities no matter your gender, race, religion, age, sexual orientation, colour, disability, or place of origin. To help mitigate any potential unconscious biases, we ask that you refrain from including your picture, age, or marital status on your CV. Let your experiences speak for themselves.
Senior Backend Engineer - .NET Core (d/f/m)
Office
Madrid
Full Time
September 18, 2025