Freelance Software Engineer & Architect

I help product teams build cloud-native web applications that drive business success

Full-stack expertise in Java, Kotlin, and JavaScript with 15+ years specializing in e-commerce systems.

Jonas Havers

What I bring to your team

Business Focus

Understand business goals and deliver solutions that drive measurable results, not just code.

Team Integration

Seamless remote collaboration. Transparent communication and shared ownership of outcomes.

Fast Delivery

Agile mindset with continuous delivery. Ship features quickly without compromising quality.

Quality Code

Clean, maintainable solutions that scale. Test-driven development and thoughtful architecture.

Full-stack expertise

Backend Architecture

  • Scalable systems build with Java/ Kotlin & JavaScript/ TypeScript
  • RESTful & event-driven API design
  • Microservices & domain-driven architecture
  • Clean, maintainable code structures

Frontend Development

  • Modern component-based frameworks
  • Responsive, accessible user interfaces
  • High-performance web applications
  • Cross-browser compatibility

Cloud & DevOps

  • AWS containerized deployments
  • Automated CI/CD & GitOps workflows
  • Infrastructure as Code management
  • Production monitoring & incident response

Data & Integration

  • SQL & NoSQL database architectures
  • Real-time event streaming systems
  • Third-party service integrations
  • Data modeling & query optimization
20+ Years
Software Engineering Experience
15+ Years
E-Commerce Business Experience
Since 2017
Full-Time Remote Collaboration
Since 2012
Lecturer at IT & Business School

Core technologies

Java
Kotlin
JavaScript
React
Spring
AWS

Ready to strengthen your team?

Let's discuss how I can help your product team deliver better software, faster.

Get in touch