Hi, I'm Lennard
Lennard Finsterbusch
Software Developer & Full-Stack Developer. I build modern web applications and love turning ideas into products.
LF

About

I'm a passionate software developer focused on building modern, scalable web applications. With experience in TypeScript, Next.js, React, and AI integrations, I enjoy creating products that solve real problems. Currently working on the hansenexus GmbH ecosystem — a suite of productivity and learning tools.

Work Experience

Milestones & Clients

Key Achievements

🎓 Gründungsstipendium Schleswig-Holstein

2021-2022

Startup funding from the state of Schleswig-Holstein

🤝 Partnership with IQSH

2022-2024

Cooperation with the Institute for Quality Development at Schools in Schleswig-Holstein, Project "Lessony" at kylecode GmbH

Trusted by

Bargsten Hörakustik GmbH

Elbe-Akustik GmbH

Architekturbüro Studio Schröder

Deutscher Ladenbauverband eV

A11yplan GmbH

kuhDO GmbH

TEM-Consulting

Education

Skills

ReactReact
Next.jsNext.js
TypeScriptTypeScript
Node.jsNode.js
Tailwind CSSTailwind CSS
Convex
PostgreSQLPostgreSQL
PythonPython
DockerDocker
KubernetesKubernetes
Nextcloud
AI/LLMs
E-Learning (Storyline & Articulate 360)
Data Analysis

Projects

Website

CalNexus

AI-powered calendar and scheduling app with CalDAV integration, Google OAuth, and intelligent intent parsing for natural language event creation.

Next.jsTypeScriptConvexTailwind CSSAnthropic AICalDAVGoogle OAuth
Website

Lexilink

A comprehensive learning platform featuring vocabulary training, tests, class management, and Stripe-powered billing with 4 subscription tiers.

Next.jsTypeScriptConvexTailwind CSSStripeSentryi18n
WebsiteGitHubSource

Planex

AI-powered project planning tool that generates comprehensive project blueprints from simple descriptions. Uses Anthropic Claude for intelligent document generation.

Next.jsTypeScriptConvexTailwind CSSAnthropic AICLI
GitHubSource

Portfolio

This portfolio website — built with Next.js 16, i18n support, Magic UI animations, and fully integrated into the hansenexus monorepo.

Next.jsTypeScriptTailwind CSSMotionnext-intlReact Email

Get in Touch

Want to chat? Feel free to reach out — I'm always open to new opportunities and interesting conversations.

GitHub
LinkedIn