Senior Software Engineer I

• Hybrid flexibility → combine working from home with collaboration at our modern Amsterdam office.

• Work-life balance → flexible hours, generous vacation days, and up to 20 days of remote work abroad per year.

• Competitive package → a strong salary, attractive benefits, and professional development opportunities.

• Great environment → a collaborative workplace, fully equipped in-house gym, and regular team-building activities.

• Hybrid working → combine working from home with collaborating at our modern office in Amsterdam.

• Good work-life balance → flexible working hours, a generous number of vacation days, and the possibility to work from abroad for 20 days per year.

• Strong benefits package → competitive salary, attractive secondary conditions, and room for professional development.

• Great working environment → collegial atmosphere, fully equipped in-house gym, and regular team activities.

As a Senior Software Engineer at Nextens, you own meaningful parts of a business-critical platform used daily by thousands of professionals. You 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 enjoy complex engineering challenges and bring the judgement to balance quality, delivery, and long-term maintainability. Together with domain experts, fellow engineers, and product owners, you translate changing fiscal requirements into software our customers can trust completely.

You will join Team Fiscal, a product engineering team responsible for key parts of our Dutch tax filing platform. Together with fiscal experts and product colleagues, the team translates changing legislation into reliable software for tax professionals across the Netherlands.

• Technical challenges → scalable systems, evolving regulations, and high-volume data processing.

• Real impact → your solutions directly support over 1 million filings every year.

• Ownership → take responsibility for important platform areas and help guide technical choices.

• Technical leadership → mentor colleagues and help raise engineering quality across the team.

As a Senior Software Engineer at Nextens, you take responsibility for meaningful parts of a business-critical platform used daily by thousands of professionals. You design and build robust software, make thoughtful technical choices, and help increase the quality of a platform where accuracy, reliability, and maintainability truly matter.

You get energy from complex technical challenges and know how to strike a good balance between quality, progress, and maintainability. Together with domain experts, other engineers, and product owners, you translate changing tax requirements into software that our customers can trust blindly.

You will join Team Fiscal, a product engineering team responsible for important parts of our Dutch tax filing platform. Together with tax experts and product colleagues, the team translates changing laws and regulations into reliable software for tax professionals throughout the Netherlands.

What makes this role special:

• Technical challenge → complex algorithms, high data volumes, and changing tax rules.

• Visible impact → your solutions support more than 1 million filings annually.

• Ownership → you take responsibility for important platform components and help guide technical choices.

• Technical leadership → you coach colleagues and help raise the engineering quality within the team.

• 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.

• Designing, building, and further developing core modules for tax filing and compliance, with ownership from solution design to long-term maintainability.

• Applying modern engineering practices, including AI-assisted development tools where appropriate, to improve productivity, quality, and maintainability.

• Developing and improving back-end and front-end components, APIs, interfaces, and integrations for a scalable and stable platform with large data volumes and complex tax logic.

• Contributing to new features and innovations, such as connections with external packages or the integration of tax advisory tools.

• Collaborating with domain experts and product owners to translate regulations and customer needs into reliable software.

• Improving engineering quality through testing, refactoring, code reviews, and coaching other engineers.

Amsterdam | Hybrid Work Model | Full-Time

Build software professionals trust when accuracy matters most.

Ready to Build What Matters?
If you're eager to take ownership of complex engineering challenges and help shape how tax professionals work, we'd like to hear from you. Build software where precision matters and your expertise leads the way.

*******

Do you want to take ownership of complex technical challenges and have influence over how tax professionals do their work?
Then join Nextens and help build solutions where precision counts and your expertise makes the difference.

Primary Location Base Pay Range: NLD Amsterdam (Radarweg) €65,300 - €108,800.

We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here to access benefits specific to your location.