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Sven HajerSH

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Freelancer profile translated to English.
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About Sven

Web development with technical expertise

As a freelance web developer, I conceptualize and develop individual WordPress solutions with a focus on performance, GDPR compliance, and sustainable scalability. Through my technical expertise in IT audits and modern frontend development (React, TypeScript), I realize technically demanding projects with long-term maintainability.
  • English

    Native or bilingual

  • Polish

    Native or bilingual

  • German

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Hoenicke Systembetreuung GmbH
    IT Auditor
    MEDICAL
    October 2023 - February 2024 (4 months)
    Stralsund, Germany
    IT Security & Compliance for Practices & Therapists

    • Technical audits according to BSI IT-Grundschutz/GDPR – vulnerabilities identified & resolved
    • Remote maintenance & hardening of IT systems (e.g., firewalls, backups, access controls)
    • Training employees on IT security (passwords, phishing, data protection)
    • Documentation & compliance for KV-secure processes (e.g., digital patient records)
    IT Security Testing & Quality Assurance IT Strategy Training & Awareness
  • one2Marketing
    WordPress Developer
    DIGITAL AND IT
    July 2022 - October 2022 (3 months)
    Mühlheim, Germany
    Modern Websites with a Focus on Performance & GDPR
    I develop fast, secure, and user-friendly websites – from WordPress to React/TypeScript frontends. My focus:
    • Performance Optimization (Core Web Vitals, Lighthouse Score >90, Caching Strategies)
    • Responsive & Accessible Designs (Mobile First, UX/UI Tests, WCAG)
    • GDPR-compliant Solutions (Cookie Consent, Privacy Policies, Secure Plugins)
    • SEO & Conversion (Meta Tags, Structured Data,)
    • IT Security (SSL, Firewalls, Regular Audits)
    Result: Websites that load quickly, convert, and are legally compliant – for businesses that want to succeed online.
    SEO Optimization Performance Optimization CMS Customization WordPress GDPR
  • beRARE MEDIA
    WordPress Developer & Web Designer
    DIGITAL AND IT
    October 2019 - January 2020 (3 months)
    Nauheim, Germany
    Project Management for Websites – From Idea to Maintenance
    I manage web projects holistically – from conception to implementation and long-term support. My focus:
    • Project Management (Scheduling, Budget, Stakeholder Communication)
    • GDPR-compliant Websites (Cookie Consent, Privacy Policies, Secure Hosting Solutions)
    • Content Maintenance & CMS Management (WordPress, Regular Updates, Backups)
    • Maintenance & Development (Performance Optimization, SEO, Usability Adjustments)
    • Quality Assurance (Tests, Bug Fixing, Compliance Checks)
    Result: Websites that are legally compliant, user-friendly, and successful in the long term.
    WordPress (GDPR, Performance, Custom Plugins) GDPR Content Integration Data Privacy WordPress Maintenance

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Education

  • Computer Scientist for Game & Multimedia Development
    Berufsförderungswerk SRH Heidelberg
    2018
    Informatiker für Game- & Multimedia-Entwicklung
  • Training as an IT Clerk
    Berufsförderungswerk Frankfurt
    2018
    Ausbildung zum Informatikkaufmann

Skill set

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