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Senior Full Stack Developer

Haystack · Amsterdam

Amsterdam · HybridFull-TimePosted Jul 3, 2026

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Job description

We are working with a pioneering software company that has been a leader in ERP solutions for the installation and technical sectors for over 30 years. This company combines deep industry knowledge with technological innovation to create impactful software, fostering an informal yet professional atmosphere that prioritizes collaboration, knowledge sharing, and personal growth.

The Role

  • Develop and maintain innovative, cloud-based web applications for the business market.
  • Work with a modern Microsoft stack, using .NET C# for backend development.
  • Integrate agentic development, designing intelligent, autonomous software components.
  • Act as a technical point of contact and coach, supporting team members' growth.
  • Contribute to architectural decisions, scalability, AI applications, and code quality.
  • Actively participate in team meetings, code reviews, and the technical roadmap.

What You'll Need

  • A Bachelor's or Master's degree in Computer Science or a related field.
  • Extensive experience with .NET C#, .NET (Core), Angular, Typescript, and CSS/SASS.
  • Affinity for or experience in an agentic development environment (e.g., AI-driven systems).
  • Architectural mindset with an eye for scalability, security, and performance.
  • Strong collaboration skills and an openness to continuous learning.
  • Excellent command of both Dutch and English, written and spoken.

What's On Offer

  • Attractive monthly salary between €3141 and €6147 based on a 40-hour week.
  • Comprehensive benefits including pension scheme, travel allowance, and profit distribution.
  • Opportunities for personal development through training, education, and conferences.
  • Flexible hybrid work arrangements and the option to purchase extra leave days.

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