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Intern at DELTA Fiber · open to freelance

Maassluis / Rotterdam

Luca VerduynFull-stack developer & product builder

I build web apps, AI integrations and digital products — from the interface to the infrastructure they run on.

View my workGet in touchView CV
Paid development and hosting
Since 2021
Live accounting platform, built solo
Cijfera
Own company since 2024
LV IT-Services
Internship in the Sogeti (Capgemini) development team
DELTA Fiber

Projects

Work

Cijfera is the live product. Alongside it, own tools in development, plus work that was used at school.

Open Cijfera — live product

cijfera.nl

Sample data

Flagship product

Live product

Cijfera

Accounting for Dutch sole traders: invoices, quotes, expenses and VAT in one place, with no subscription.

Problem
Sole traders often pay for software they mainly use to invoice and keep VAT. Spreadsheets are free, but numbering, PDFs and KOR stay manual.
Solution
Cijfera covers that core in Dutch: bookkeeping that matches the return, with no required subscription.
Role
Solo: product decisions, data model, auth, UI, PDF, mail and AI import.
Stack
Next.jsTypeScriptPostgreSQLDrizzle ORMBetter AuthOpenAI API
Case studyLive product

More work

Own tools in development and school work that was used live.

  • SitePulser

    Uptime monitoring for websites, APIs and hosts. HTTP, TCP, DNS and alerts in one dashboard.

    In development

  • ikwilautorijden.nl

    AI driving instructor for practising the CBR theory exam.

    In development

  • VaultPrint

    Offline paper wallet: print seed phrases and keys in the browser, with no backend.

    In development

  • TrustDetect

    Shows which device, network and behaviour data fraud detection collects about you.

    In development

  • Security & Productivity Hub

    A Python desktop app with 2FA, auto-lock, an encrypted vault, tasks, notes and API keys.Python

    School project

  • GLR 75 school event

    A site used live during Grafisch Lyceum Rotterdam's 75th anniversary.

    LiveSchool projectVisit glr75.nl

Client work I cannot show in public is something I can walk through in a conversation.

Background

About

I'm Luca Verduyn. I like taking a product from idea to production: frontend and backend through to database, deployment and infrastructure.

I have done paid development work since 2021, in parallel with hands-on hosting and infrastructure practice. In 2024 I founded LV IT-Services. Cijfera is the clearest proof of how I work: sharpen the problem, choose the stack, build it, and keep it in production.

I study Creative Software Developer (MBO level 4) at Grafisch Lyceum Rotterdam. Since October 2026 I have been interning at DELTA Fiber, working in the Sogeti development team, part of Capgemini. I keep building my own products — and take freelance work when the brief fits.

AI interests me as part of a product, not as a trick. In Cijfera it is receipt import. On this site it is an assistant about my work.

Based in
Maassluis / Rotterdam
Studying
Creative Software Developer · GLR, MBO 4
Company
LV IT-Services, since 2024
Now
Intern at DELTA Fiber · Sogeti team (Capgemini)
Open to
Freelance projects

Career

Experience

Development and hosting since 2021, own company since 2024. Now interning at DELTA Fiber in the Sogeti team. Practice alongside my studies.

  1. Development

    Software developer intern

    DELTA Fiber · Sogeti (Capgemini) development team

    Internship at DELTA Fiber, working in the Sogeti (part of Capgemini) development team, alongside the Creative Software Developer course. Back at DELTA Fiber after the 2023 IT-support placement — this time in development.

    InternshipDELTA FiberSogeti

  2. Product

    Sole trader

    LV IT-Services

    Own company. Web apps, websites and AI integrations for clients. Cijfera is my own product: invoices, expenses, Dutch VAT and KOR.

    • Solo design and build of Cijfera (Next.js, TypeScript, PostgreSQL)
    • Chatbots, websites and OpenAI integrations for clients
    Own companyNext.js

  3. Infrastructure

    Hosting & Infrastructure

    Dutch hosting company

    Since 2021 I have been getting hands-on experience in hosting and infrastructure. VPS environments, Linux/Ubuntu, domains, DNS, and the path from code to a live environment — how software is not only built, but actually taken online and kept running.

    • Hands-on work with VPS environments and Linux servers (Ubuntu)
    • Domains, DNS and deployments for services that need to stay online
    LinuxVPSDNS

  4. Development

    Freelance developer

    Client work

    First paid development work, from 2021, alongside the hosting practice. Building websites and web apps until they are live.

    • Designed and built websites and web apps
    • Work that has to stay online
    FreelanceWeb development

  5. IT support

    IT support internship

    DELTA Fiber Nederland, Schiedam

    VMBO internship of about one month. IT questions in a professional environment. Not a development internship.

    InternshipIT support

Education

  1. Creative Software Developer

    Grafisch Lyceum Rotterdam · MBO level 4

  2. VMBO-Kader Economics & Entrepreneurship

    ISW Westland Vakcollege

Technology

Stack

From interface to infrastructure. What I use most, and what also shows up in projects and school.

  1. Frontend
  2. Backend
  3. Database
  4. AI / APIs
  5. Deployment
  6. Hosting
  7. Infrastructure

Used most

Frontend (Used most)
  • TypeScript
  • JavaScript
  • React
  • Next.js
  • Tailwind CSS
Backend (Used most)
  • Node.js
  • REST APIs
  • Laravel
  • PHP
  • Python
Database (Used most)
  • PostgreSQL
  • MySQL
AI / APIs (Used most)
  • OpenAI API
Infrastructure
  • Linux
  • Ubuntu
  • VPS
  • DNS
  • Cloudflare
  • Deployments
Tools
  • Git
  • Figma
Also used
  • C#
  • SQL
  • Windows Server
  • Grafana

Services

Freelance

I take projects end to end: from a focused feature to a product that can go live — including what it takes to ship and keep it online. No agency layer, no hosting packages.

  1. Websites & web apps

    Next.js and TypeScript. From a site to an app with accounts, a database and PDFs — the same shape as Cijfera in production.

  2. AI integrations

    OpenAI inside an existing product: import, assistants, automation. Not a standalone chatbot demo.

  3. Backends & APIs

    PostgreSQL or MySQL, auth, REST. Data models that enforce constraints instead of hoping the UI will.

  4. Deployment & infrastructure

    Getting a project live and keeping it there: VPS, Linux, DNS, deployments. Not a hosting company — a developer who understands the stack through to production.

Building something?

Email me

Contact

Let's build something.

Open to freelance projects: from a focused feature to a product that needs to go live. Email is fastest.

verduynluca@gmail.com
LinkedInView CV
  • Intern at DELTA Fiber · open to freelance
  • Maassluis / Rotterdam, the Netherlands