Senior Software Engineer I

ppbBuild software professionals trust when accuracy matters most. /b /ppNextens 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. /ppBuilt on deep domain expertise and a commitment to continuous innovation, Nextens not only ensures compliance, we set the standard for how tax professionals work. /ph3Your Role /h3pAs 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. /ppYou 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. /ppYou 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. /ph3Key responsibilities include: /h3ulliDesign, build, and evolve core modules for tax filing and compliance, taking ownership from solution design through long‑term maintainability. /liliUse modern engineering practices, including AI‑assisted development tools where appropriate, to improve productivity, quality, and maintainability. /liliDevelop 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. /liliContribute to new features and innovations, such as integrations with external systems and tools for tax advisory workflows. /liliWork closely with domain experts and product owners to translate regulations and customer needs into reliable software solutions. /liliImprove engineering quality through testing, refactoring, code reviews, and mentoring other engineers. /li /ulh3What You Bring /h3ulliA bachelor's degree in Computer Science , Software Engineering, or equivalent experience. /lili4+ years of hands‑on software development experience, with evidence of increasing technical ownership, preferably with C#, .NET, Azure, and modern web technologies. /liliA strong quality mindset, including testing, refactoring, code reviews, clean architecture principles, and coaching others to raise engineering standards. /liliInterest in using AI‑assisted development tools responsibly as part of everyday engineering work. /liliStrong analytical and problem‑solving skills, especially when working with complex logic or data. /liliA collaborative mindset — you enjoy working closely with engineers and domain experts to create practical, high‑quality solutions. /liliA focus on clean, maintainable code and a habit of writing tests to ensure quality. /liliFluency in English is required. You can read and understand Dutch requirements texts; spoken Dutch is helpful but not essential. /li /ulh3Why Join Us /h3pAt Nextens , your work powers the backbone of professional Dutch tax processing and helps thousands of professionals work smarter, faster, and more confidently. Our customers trust us not only for accuracy and compliance, but also because we innovate and improve how they work. /ph3What makes this role unique: /h3ulliT echnical challenges scalable systems, evolving regulations, and high-volume data processing. /liliReal impact your solutions directly support over 1 million filings every year. /liliOwnership take responsibility for important platform areas and help guide technical choices. /liliTechnical leadership mentor colleagues and help raise engineering quality across the team. /li /ulh3What we offer you : /h3ullibHybrid flexibility /bcombine working from home with collaboration at our modern Amsterdam office. /lilibWork-life balance /bflexible hours, generous vacation days, and up to b20 days of remote work abroad /bper year. /lilibCompetitive package /ba strong salary, attractive benefits, and professional development opportunities. /lilibGreat environment /ba collaborative workplace, fully equipped in-house gym, and regular team‑building activities. /li /ulh3Ready to Build What Matters ? /h3pIf 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 bprecision matters /band your bexpertise leads the way /b. /ppPrimary Location Base Pay Range: NLD Amsterdam (Radarweg) €65,300 - €108,800. /ppbWe know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. /b /ppWe are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact . /ppWe 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. /p /p #J-18808-Ljbffr