I ship software that
makes you money.
Product-minded fullstack developer with 6+ years turning business problems into profitable solutions. Handelsblatt, Check24, and 15+ companies trust me to deliver.
👇 Book a discovery call for your development project
Why businesses choose me
Most developers build features. I build businesses.
I'm Leander van Diepen. 6+ years shipping software that moves revenue needles. While others debate frameworks, I deliver production systems that solve real problems.
Here's how I work: Understand your business first. Architect the right solution. Ship fast, iterate faster. At Handelsblatt, I didn't just optimize their platform—I cut costs while scaling performance. That's business impact.
Check24: Frontend components serving 10,000+ users monthly. Neochic: Cloud infrastructure that scales profitably. My own company: 2+ successful projects delivered on time, on budget. Each one drove measurable results.
My expertise spans: Fullstack development. Cloud architecture. Process automation. DevOps. Generative AI integration. Project management. I think like a product owner, code like an engineer, and deliver like a business partner.
Ready to turn your technical challenges into competitive advantages? Let's talk.
Track Record That Speaks
Interested in learning more?
Download my complete CV for detailed project descriptions, technical expertise, and professional experience.
How I Can Help You
Two focused ways to work together. Choose what aligns with your current needs and goals.
Technical Consultation
Get immediate help with your project challenges. Whether you're stuck on a specific problem or need strategic guidance, I provide expert consultation that can lead to longer-term collaboration.
- Solve immediate technical roadblocks
- Architecture and design guidance
- Code review and optimization
- Technology stack recommendations
- AI integration
- Potential for ongoing partnership
AI Powered Development
Level up your development skills with personalized coaching. From complete beginner to landing your first job, or from junior to confident mid-level developer. This is a 1:1 coaching program that is tailored to you.
- Personalized learning path creation
- Hands-on project guidance
- Portfolio development support
- Interview preparation and practice
- Career advancement strategies
Enterprise Projects. Production Systems. Proven Results.
Handelsblatt Media Group
Core website infrastructure for Germany's leading business publication. Angular frontend and Koa backend serving millions of monthly visitors with enterprise-grade performance.
Impact:
Optimized platform performance and reduced infrastructure costs while scaling to handle increased traffic load
Tech Stack:
YouBookUs - Business Management Platform
Full-stack booking and business management system with real-time synchronization, multi-tenant architecture, and integrated payment processing for service-based businesses.
Impact:
Eliminated booking conflicts and streamlined operations, reducing manual work by 60% for service businesses
Tech Stack:
Check24 Sports Travel Platform
Frontend development for Germany's leading travel booking platform. Built responsive components and modular UI systems for seamless customer booking experiences across mobile and desktop devices for 10.000+ monthly users.
Impact:
Enhanced user experience through optimized booking journey and comprehensive automated testing, improving conversion rates
Tech Stack:
ClueZo - Enterprise Compliance Tool
SAP Cloud-based whistleblower platform enabling secure, multilingual compliance reporting for enterprise clients with integrated conversational AI and automated workflows.
Impact:
Streamlined compliance processes for insurance sector, reducing reporting time by 70% and ensuring regulatory adherence
Tech Stack:
Ready to Level Up Your Development?
Whether you need immediate technical consultation for your project challenges or personalized AI development coaching to advance your career, I'm here to help you succeed.
Leander van Diepen
Full-Stack Developer & Technical Consultant