Maikel Heijen

Full-StackDeveloper

Based

Netherlands

Experience

3+ years

Current

Consultant & Technical Advisor, SOEP

I work mostly in TypeScript, React and Next.js, with Postgres behind it. I choose quality over speed: clean, thoughtful, and actually useful. Outside of code I spend my time at the gym, reading, and following the markets.

Skills

Languages

JavaScript, TypeScript, Python, C#, HTML, CSS, TailwindCSS

Frameworks

React, Next.js, Flask, Clerk, Drizzle, Strapi

Backend

Node.js, .NET, REST APIs

Databases

PostgreSQL, SQLite, MySQL

Cloud & DevOps

Vercel, AWS, Supabase, Docker, CI/CD

Testing & Practices

Vitest, Agile, Scrum, DevOps, Event-Driven, Claude Code

Experience

SOEP

Consultant | Technical Advisor

Supporting projects and AI initiatives within SOEP

Jul 2026 —

Software Developer Graduation Project

Transforming mobile app to web-based platform for Positieve Gezondheid to expand functionality and reach

Feb – Jun 2026

Software Developer Intern

Dashboard improvements for StreetArtCities

Feb – Apr 2025

Freelance NahNova

Software Developer

Helping out with Frontend & Backend for Landelijkatelierweekend

Okt 2025 —

Glowi Solutions

Junior Software Developer

Worked on an integration between HaloPSA and Sippy

Dec 2025

Data Intelligence ZUYD

AD Graduation project

Developed Flask web-application to visualise CSV-file

Feb – Jun 2024

CBS Heerlen

MBO Internship

IT Supportdesk

Nov 2020 – Feb 2021

Maastricht University

MBO Internship

IT Supportdesk

Feb – May 2020

Education

Bachelor ICT

CUM LAUDE

Information & communication technology

Minors: Software Architecture · Cyber Security · Ethical Hacking

2024 – 2026

Associate Degree ICT

Web- and app development

2021 – 2024

IT Systems Administrator

Computer Installation and Repair Technology/Technician

2018 – 2021

Work

Positievegezondheid.app

TypeScript, Next.js, PostgreSQL, Clerk, Vercel, Drizzle, Vitest, Docker, AWS

Web platform replacing SOEP's native health app, built as my bachelor thesis. Stepped questionnaire, org dashboard with k=5 privacy, ETL migration, and freemium RBAC.

Live

StockDiff.com

JavaScript, TailwindCSS, Next.js, Supabase, PostgreSQL

A portfolio tracking platform for comparing your investments against the S&P 500, simulating compound growth, and calculating Dutch Box 3 tax implications. Currently features near real-time stock quotes, interactive performance charts, and a compound interest visualizer.

Live

Qualroma.com

JavaScript, TailwindCSS, Next.js

A financial platform for tracking stocks, analyzing company metrics, and monitoring market trends. Currently features trending stocks, analyst recommendations, and earnings data. Work in progress, more features coming soon.

Live

Mollystrimsalon.com

JavaScript, TailwindCSS, Next.js

Migrated an existing static website built in plain HTML & CSS to a modern Next.js stack with Tailwind CSS. The project included a full visual redesign: new layout, typography, and component structure.

Live

Landelijkatelierweekend.nl

Contributed, JavaScript, TailwindCSS, Next.js, Strapi

Improved the dashboard's visual design to enhance user experience and assisted with backend development.

Live

KeuringTracker.com

TypeScript, Next.js, Supabase, PostgreSQL, Clerk, TailwindCSS, Vitest, Vercel

Internal fleet management tool built for a Volvo dealership to track when vehicles from the own fleet are due for inspection. Automatic status color-coding and a calendar view keep vehicles from missing their inspection window.

Live

Streetartcities.com

Contributed, JavaScript, TailwindCSS, Next.js

Frontend development work focusing on dashboard improvements, API data visualization, and implementing changes and additions as needed for the platform.

Live

School projects

ERP Business Process Management System

Contributed, C#, JavaScript, .NET, Next.js, Docker

An enterprise resource planning system with real-time process monitoring, bottleneck detection, and automated performance analytics. Features production line management, interactive dashboards, and business process optimization tools.

Repo

Monitoring tool with dashboard

Contributed, TypeScript, PHP, C#, JavaScript, GO, Next.js

A comprehensive cybersecurity monitoring platform with real-time data collection and visualization. Built using microservices architecture across multiple technologies for scalability and modularity.

Repo

Event-Driven Architecture Speech-to-Text

Contributed, Python, TypeScript, JavaScript, Next.js, SQL

A scalable event-driven architecture that processes speech input and converts it into structured data for application and diagram generation.

Repo

Console Application

Contributed, C#

Focused on Object-Oriented Programming, using classes and objects to establish relationships and store data from a database.

Repo

Certification

AI Fluency for Builders

Anthropic · How AI works, The 4D framework for builders, Discernment for builders

Verify

AI Capabilities and Limitations

Anthropic · Next Token Prediction, Knowledge, Working Memory, Steerability

Verify

AI Fluency: Framework & Foundations

Anthropic · Deligation, Description, Discernment, Diligence

Verify

Create a Back-End App with JavaScript

Codecademy · JavaScript Objects, Modules, and Browser Compatibility, Building Back-End Servers with Express.js, SQL for Back-End Development, Connecting JavaScript and SQL

Verify

Pass the Technical Interview with JavaScript

Codecademy · Linear Data Structures, Hash Maps, Algorithmic Concepts, Nonlinear Data Structures, Sorting Algorithms, Graph Data Structures

Verify

Learn Next.js

Codecademy · Routing, Server Components, Fetching, Optimization, Deployment

Verify

Learn Advanced React

Codecademy · Custom Hooks, Context, Error Boundaries, Optimization

Verify

Learn React

Codecademy · JSX, React Components, Components Interacting, Hooks, React Programming Patterns, React Styles, React Forms

Verify

Learn Intermediate JavaScript

Codecademy · Classes, Modules, Promises, Async-Await, Requests, Error Handling, JavaScript Under the Hood, JavaScript Best Practices

Verify

Learn JavaScript

Codecademy · Conditionals, Functions, Scope, Arrays, Loops, Iterators, Objects

Verify