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Hello, I am
Daniel Kosbab

Mathematics and Full-Stack Engineering

Portrait of Daniel Kosbab
About me

How I think about software

I'm 29, a full-stack engineer with a mathematics degree, working between Germany and the Netherlands. Math taught me to see patterns, think in systems, and break complex problems into clean, logical steps — that's still how I approach every line of code.

I also specialize in web accessibility (EN 301 549). My brain latches onto edge cases — I see the ways things break before I see the happy path. If a site doesn't work with a screen reader, it's broken. Period. I dive deep into these problems until they're actually solved, not just "fixed." Half-complete solutions bother me in a way that's hard to explain.

Outside of work: running, coding, piano, science fiction, astronomy.

My Expertise

Three things I'm good at

Mathematics

Strong foundation in mathematical modeling, optimization algorithms, and statistical analysis. Applying theoretical concepts to solve real-world challenges.

Full-Stack Engineering

End-to-end application engineering from database design to responsive frontends. Modern tech stack with React, Next.js, TypeScript, Node.js, and PostgreSQL.

Web Accessibility

Expert in EN 301 549 standard. Building inclusive digital experiences that work for everyone, including assistive technology users.

Technologies

What I build with

Python
R
PyTorch
TensorFlow
scikit-learn
Keras
OpenCV
Pandas
NumPy
Plotly
Jupyter
React
Next.js
Gatsby
TypeScript
JavaScript
Tailwind CSS
Node.js
FastAPI
GraphQL
Docker
Kubernetes
PostgreSQL
MySQL
MongoDB
Supabase
Firebase
Git
GitHub
Storybook
Projects

What I've built

2024–2025

DeepSpectrum Lab

AI-powered learning platform for neurodivergent children (autism, ADHD). Evidence-based training tools with adaptive difficulty, progress tracking, and personalized learning paths to support cognitive development.

Machine LearningReactNext.jsPythonAccessibility
2025

Crisis Brief Nederland

Daily 3-minute neutral crisis briefing for civilians in the Netherlands. Fact-based information about regional impacts (energy, infrastructure, cyber) from verified sources, with clear explanations and actionable insights.

Next.jsTypeScriptContent PlatformResponsive Design
2024–2025

Lisa - Accessibility Testing Tool

Desktop application for comprehensive WCAG 2.2 accessibility testing. Built with Electron and Next.js, providing automated and manual testing workflows for web developers.

ElectronNext.jsTypeScriptAccessibilityDesktop App
2025

Portfolio Architecture

Modern portfolio website showcasing clean design principles and accessibility best practices. Built with Next.js, TypeScript, and Tailwind CSS.

Next.jsTypeScriptTailwind CSSUI/UX
Contact

Let's work together

Send an email

© 2026 Daniel Kosbab

Built with and Tailwind CSS