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Senior Software Engineer I

Amsterdam💼 Full-time🗓 2026-07-13 → 2026-10-02

Core

Design, build, and evolve core modules for tax filing and compliance, translating complex fiscal regulations into reliable software for Dutch tax professionals.

Role type

Senior Software Engineer (.NET/Azure)

Builds

Scalable, stable platform for tax filing and compliance supporting over 1 million filings annually

Domain

Financial services / Tax compliance

Deliverable

production ML models | product features

Required skills

C#, .NET, Azure, modern web technologies, API design, front-end development, back-end development, testing, refactoring, code reviews, clean architecture (via careerplan.io/jobs/R115966-senior-software-engineer-i-at-relx)

Preferred skills

AI-assisted development tools, mentoring, coaching

Technologies

C#, .NET, Azure

Responsibilities

Design and build core modules for tax filing and compliance; Develop and improve back-end and front-end components, APIs, and integrations; Work with domain experts to translate regulations into software; Improve engineering quality through testing, refactoring, and code reviews; Mentor other engineers

Seniority

Senior, hands-on IC