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Koen S.KS

Koen S.

Senior Laravel Developer (Since 2011)

€750/day
Velp, NL
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Koen

With over 13 years of experience building complex web applications, I help companies and agencies translate intricate business logic into scalable Laravel architectures.

My background is in the SaaS sector (including work at HomeShow), where I specialized in automating workflows and building robust API connections.

Why work with me?

Seniority & Speed: No hand-holding required. I understand complex briefs and translate them directly into quality code.

Security Mindset: As a junior ethical hacker, I build code that is 'secure by design'. I look beyond just functionality and protect your data from vulnerabilities.

Results-Oriented: I work highly efficiently in focused blocks, making me the ideal partner for agencies looking for senior 'overflow' capacity or specialized expertise on a project basis.

Expertise:
PHP 8+, Laravel (incl. Livewire), PostgreSQL, API Integrations, Security Audits & Refactoring.
  • Dutch

    Native or bilingual

  • English

    Fluent

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

Experience

  • Software Startup (naam op aanvraag)
    Lead Developer
    SOFTWARE PUBLISHING
    February 2025 - Today (1 year and 6 months)
    Responsible for the entire technical architecture, development, and maintenance of the platform.
    • End-to-End Ownership
    • Scalability & Infrastructure
    • Product Strategy
    • API & Integrations
    The application is multi-tenant, multi-database SaaS tracking and marketing attribution software.
    Laravel API PHP PostgreSQL Back-End development
  • HomeShow
    Developer
    REAL ESTATE
    February 2017 - March 2021 (4 years and 1 month)
    In this role, I laid the foundation for my expertise in large-scale Laravel applications and data automation.
    • Core development
    • Data integrations
    • Feature development
  • Freelance
    Senior Freelance Developer / Consultant
    SOFTWARE PUBLISHING
    November 2011 - Today (14 years and 9 months)
    Velp, Netherlands
    In addition to my salaried roles, I have carried out various freelance projects for over a decade. The focus was on solving complex technical challenges for SMEs and various startups.
    • Developing custom Laravel packages and API integrations.
    • Modernizing legacy codebases (migrations from old PHP versions to Laravel).
    • Performance optimization of databases for high-traffic webshops.
    • Security audits and patching vulnerabilities in existing PHP applications.
    I am constantly developing myself in various directions that interest me.
    PHP Laravel API Back-End development PostgreSQL

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