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Roel De JongRD

Roel De Jong

Senior Full-Stack AI Software Engineer

€700/day
Amsterdam, NL
8-15 years

Average response time: 1 hour

About Roel

Experienced Software Engineer – for robust, scalable, and user-friendly web applications

Got an idea for a platform like Airbnb, IMDB, or LinkedIn – tailored to your industry? Or are you looking for a developer who can independently build or improve a reliable web application? I’d be happy to help.

I'm an experienced software engineer with a strong focus on quality, scalability, and maintainability. That means well-structured code, built according to solid Object-Oriented Design principles.

With over 9 years of experience, I’m most comfortable working with Ruby, JavaScript, and TypeScript. I’ve worked at both startups and scale-ups, in roles ranging from Software Engineer to Lead Engineer. On larger projects, I’ve helped migrate to microservices and rebuild complex legacy systems. For smaller projects, I often use a Jamstack approach: fast, secure, and future-proof.

I can help you with:
  • Building or improving SaaS platforms or online communities
  • Custom blogs or CMS solutions with full control over your content
  • Advanced features like search, chat, multiple user roles, interactive pages
  • Technical SEO, performance optimization, and accessibility
  • Secure and scalable backend development
  • Integrations with APIs, payments, authentication systems (e.g., Keycloak)
New idea? Existing app? Let’s discuss the smartest way forward – I’d love to support you with a practical, future-ready solution.
  • Dutch

    Native or bilingual

  • English

    Fluent

  • French

    Conversational

Can work on-site
Amsterdam (up to 50km), Rotterdam (up to 50km)

Experience

  • Semiprof
    Software Engineer
    DIGITAL AND IT
    January 2023 - August 2023 (7 months)
    Rotterdam, Netherlands
    Deel van de bouw van Semiprof, en het omzetten naar Bamboe.io, een platform waar startende freelancers worden gekoppeld aan midden en kleine bedrijven.
    Software Development Recruitment IT-Consulting
  • Group Moovs
    Software Engineer
    EDUCATION AND E-LEARNING
    June 2022 - January 2025 (2 years and 7 months)
    Amsterdam, Netherlands
    Part of the build of a Learning Experience System, with the challenge of scalability with generic services.
    Software Development JavaScript Typescript Educational Technology Learning Management System E-learning Prisma GraphQL React.js AWS
  • Rodeo - Project Management Tools
    Software Engineer
    June 2020 - Today (6 years)
    Amsterdam, North Holland, Netherlands

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Education

  • Certificate
    National Taiwan Normal University
    2016
  • Graduate Exchange Program
    National Chengchi University
    2016

Skill set

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