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Nikolas KotsikosNK

Nikolas Kotsikos

Front-end Developer

€250/day
Rotterdam, NL
3-7 years

Average response time: 1 hour

About Nikolas

I'm Nikolas — a frontend developer based in Rotterdam with a background that most people don't expect. Before writing a single line of production code, I spent 14 years as a practising architect in Athens, managing projects from concept through to construction.

That background didn't disappear when I switched careers — it sharpened how I approach frontend work. The same thinking that goes into a building's spatial hierarchy, material consistency, and structural integrity maps directly onto component architecture, design systems, and performant, maintainable code.

I've been living in Rotterdam for around 7 years now, and I work primarily building interfaces that are as considered under the hood as they look on screen.
  • Greek

    Native or bilingual

  • English

    Fluent

  • Dutch

    Conversational

  • German

    Basic

  • Spanish

    Basic

  • French

    Basic

Can work on-site
Rotterdam (up to 30km), Amsterdam (up to 10km), Utrecht (up to 10km), The Hague (up to 10km)

Experience

  • Meta-Skills
    Front-end Developer
    EDUCATION AND E-LEARNING
    August 2024 - August 2025 (1 year)
    Utrecht, Netherlands
    > Designed and built responsive frontend components for Meta-Skills's website, improving user engagement by implementing modern UI patterns.
    > Led UX/UI design and prototyping in Figma for the company's proprietary web application, collaborating with product team.
    > Developed type-safe Svelte/SvelteKit components in TypeScript, reducing bug reports by implementing strict typing standards.
    > Implemented visual regression testing using svelte-csf in Storybook, ensuring component consistency across releases.
    Svelte Typescript
  • SIDES Benelux
    Front-end Developer
    E-COMMERCE
    February 2022 - December 2023 (1 year and 10 months)
    Bosschenhoofd, NB, Netherlands
    > Front-end development of webshops, mobile apps and self order terminals in HTM L/PHTM L,SaSS & JQuery for clients in the restaurant industry.
    > Deployment, code review and merging.
    > Delivered 15+ webshop frontends for restaurant clients including major chains, consistently meeting 2-week sprint cycles.
    > Reduced mobile checkout abandonment by 25% through responsive design improvements.
    jQuery HTML5 SASS Jenkins
  • Online Drumles
    Front-end Developer
    EDUCATION AND E-LEARNING
    September 2021 - February 2022 (5 months)
    The Hague, Netherlands
    > Front-end development of the Onlinedrumles educational platform in HTM L/PHTM L,CSS & Javascript.
    > Optimized platform load time by 35% through CSS refactoring and JavaScript optimization.
    > Custom widgets creation in PHP.
    > Maintenance, updating and modification of WordPress plugins for the live webshop.

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Education

  • Full Stack Web Developer
    Diploma Code Institute
    2021
    Full Stack Web Developer
  • M.Sc. Architecture
    South Bank University
    2004
    M.Sc. Architecture

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