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About the Role
As a Senior Software Engineer at Nextens, you will own meaningful parts of a business-critical platform used daily by thousands of professionals. You will design and deliver robust software, make sound technical choices, and help raise the quality of a platform where accuracy, reliability, and maintainability truly matter. You will join Team Fiscal, a product engineering team responsible for key parts of our Dutch tax filing platform.
Responsibilities
- Design, build, and evolve core modules for tax filing and compliance, taking ownership from solution design through long-term maintainability.
- Use modern engineering practices, including AI-assisted development tools where appropriate, to improve productivity, quality, and maintainability.
- Develop and improve back-end and front-end components, APIs, interfaces, and integrations for a scalable, stable platform with large data volumes and complex tax logic.
- Contribute to new features and innovations, such as integrations with external systems and tools for tax advisory workflows.
- Work closely with domain experts and product owners to translate regulations and customer needs into reliable software solutions.
- Improve engineering quality through testing, refactoring, code reviews, and mentoring other engineers.
Requirements
- A bachelor’s degree in Computer Science, Software Engineering, or equivalent experience.
- 4+ years of hands-on software development experience, with evidence of increasing technical ownership, preferably with C#, .NET, Azure, and modern web technologies.
- A strong quality mindset, including testing, refactoring, code reviews, clean architecture principles, and coaching others to raise engineering standards.
- Interest in using AI-assisted development tools responsibly as part of everyday engineering work.
- Strong analytical and problem-solving skills, especially when working with complex logic or data.
- A collaborative mindset — you enjoy working closely with engineers and domain experts to create practical, high-quality solutions.
- A focus on clean, maintainable code and a habit of writing tests to ensure quality.
- Fluency in English is required. You can read and understand Dutch requirements texts; spoken Dutch is helpful but not essential.
Skills
- C#
- .NET
- Azure
- Modern web technologies
- Angular
- React
- AI-assisted development tools
Location
- Amsterdam
Work Type
- Hybrid Work Model
- Full-Time
Experience Level
- Senior
- 4+ years of hands-on software development experience
Education Level
- Bachelor’s degree in Computer Science, Software Engineering, or equivalent experience
Salary/Compensations
- €65,300 - €108,800
Benefits
- Hybrid flexibility
- Work-life balance
- Flexible hours
- Generous vacation days
- Up to 20 days of remote work abroad per year
- Competitive package
- Strong salary
- Attractive benefits
- Professional development opportunities
- Great environment
- Collaborative workplace
- Fully equipped in-house gym
- Regular team-building activities
About the Company
- Nextens develops the leading tax and compliance platform for professionals in the Netherlands. Trusted by thousands of experts, our software supports more than 1 million filings each year and helps organizations navigate evolving tax rules, high-volume data, and complex workflows with precision and reliability.
- Built on deep domain expertise and a commitment to continuous innovation, Nextens not only ensures compliance, we set the standard for how tax professionals work.
Equal Opportunity
- We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.