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Lars SouilljeeLS

Lars Souilljee

Software Developer

€300/day
Enschede, NL
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Lars

I am a software developer with a focus on backend automation and web security. In my previous role at an ISP, I built automation tools and a full security header analysis platform — including scoring logic, API design, and deployment.

I work well in situations where the problem is not yet fully defined. Give me a workflow to automate, an API to build, or a security vulnerability to fix, and I will solve it.

I am currently studying Business & IT at the University of Twente and am available for short and medium-term projects.
  • Dutch

    Native or bilingual

  • English

    Fluent

  • German

    Conversational

  • French

    Conversational

Can work on-site
Enschede (up to 50km)

Experience

  • ROOT ISP,
    Software Developer
    July 2025 - May 2026 (10 months)
    Enschede, Netherlands
    Built and owned a full-stack HTTP security header scanner (FastAPI, NGINX, Ubuntu)
    grading sites A–F against OWASP and MDN standards
    Created monitoring and integration tooling to connect internal systems and support client operations
    Python Linux Web development Webdesign IT-Security
  • Deventer Ziekenhuis,
    Medical Secretary
    July 2024 - September 2024 (2 months)
    Deventer, Netherlands
    Worked with the Orthopaedics outpatient clinic across two summer periods
    Built and published annual reports and departmental scheduling; processing large operational
    datasets
  • Continuum Global Solutions (KPN),
    Customer Care Associate
    July 2023 - July 2025 (2 years)
    Enschede, Netherlands
    Technical customer support specialist in a high-volume KPN contact centre
    Recognised for product knowledge and efficient resolution of complex issues

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Education

  • BSc Business & IT
    University of Twente
  • Cisco – Intro to Cybersecurity
    Cisco Networking Academy
    Cisco – Intro to Cybersecurity

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