About 45level - We close the gap between ideas and impact

Who We Are

We are a multidisciplinary team of domain experts, engineers, designers, and scientists. Modern digital business takes more than clever concepts and a handful of tools – it takes real, next-level business engineering: turning ideas into valuable, working solutions and processes your organization can adopt and scale right away. Strategy and execution come from one house, without the friction between advice and engineering.

Certifications & Recognitions

ISO 9001 CertifiedISO 27001 CertifiedEcoVadis Certified

What Sets Us Apart

  • We Walk the Talk. We advise and build at the same time. Our own projects and ventures show that our methods hold up in the real world. Every recommendation comes from lived experience.
  • No Handover Drama. Strategy, technology and delivery live under one roof. Instead of interface ping-pong, a single team owns the work end to end – from the idea to the result.
  • Battle-Tested Expertise. Our team has delivered hundreds of projects for companies ranging from ambitious startups to DAX-listed enterprises. We've seen what works and what doesn't.
  • Global Talent, Competitive Economics. We combine senior expertise from Germany with a world-class engineering center in Sarajevo. You get premium quality without premium-only pricing.
  • Modern Tech, Proven Practices. We work with cutting-edge technologies — cloud-native platforms, AI/ML, modern data stacks — but always grounded in sound engineering principles and business pragmatism.
  • You Own Everything. All IP is yours – no vendor lock-in, no proprietary black boxes. We strengthen your own capabilities and make your team independent.

Core Team

The people who turn your vision into concrete solutions – from the first concept to the finished build.

Thomas Zeutschler

Thomas Zeutschler

Principal Business Engineer

With 25 years in digital transformation, business engineering and Data & AI, Thomas defines strategy and architecture for client engagements and drives 45level's vision of seamless, end-to-end delivery.

Adin Poprzanovic

Adin Poprzanovic

Head of Delivery & Client Engagement

Adin leads project delivery and orchestrates execution at our Rubicon Engineering Center. As the primary client partner, he ensures alignment, transparency and delivery excellence across every engagement.

Emir Kalauzovic

Emir Kalauzovic

Lead Software Architect & Product Innovation

Technologist, entrepreneur and creative force, Emir heads engineering at Rubicon – designing and building secure cloud platforms and AI-driven solutions that fuse technical depth with visionary design thinking.

Nadir Badnjevic

Nadir Badnjevic

Principal Solutions Architect

With over 13 years of experience, Nadir designs and delivers commercial software from concept to deployment. At Rubicon he leads cross-functional teams with precision and creativity to turn complex requirements into successful solutions.

Holger Leichsenring

Holger Leichsenring

Principal Cloud Architect & Infrastructure Strategy

Holger architects enterprise-scale cloud environments that unite performance and pragmatism. His mastery of distributed systems and cloud-native infrastructures turns complexity into clarity.

Leonard Zeutschler

Leonard Zeutschler

Lead AI Engineer & Applied Research

Leonard specializes in Agentic AI, Large Language Models and applied machine learning. He bridges advanced research and real-world implementation to create AI systems that deliver measurable business impact.

Engineering Center Sarajevo

Our engineering center in Sarajevo, Bosnia & Herzegovina, is home to more than 50 engineers, architects, designers and QA specialists — united by the drive to build great software. Recognized as one of the region's most respected tech workplaces, Rubicon attracts exceptional talent through its culture of trust, collaboration and continuous learning.

Led by experienced project managers and senior engineers, our teams work with modern technologies including .NET, Java, Python and TypeScript — on premises and across all major cloud platforms. They deliver solutions that meet the highest standards of quality, performance and user experience – from web and mobile applications to cloud, data engineering and AI-powered systems.

Supported by Sarajevo's strong technical universities, an emerging tech ecosystem and a vibrant local community, our team pairs deep expertise with the momentum of a rising region — delivering first-class results, fast and reliably.

50+

Engineers, Architects, Designers & QA

Tech stack

  • .NET
  • Java
  • Python
  • TypeScript
  • AWS
  • Azure
  • GCP

Extended Expert Network

To solve any challenge, we tap into a trusted network of best-in-class business domain and technology experts – from industry consultants to regulatory and change-management specialists. That way we bring the right expertise exactly when it's needed, without the overhead of a large, fixed organization. We scale instantly when required and tailor every project to the client's goals – with full 45level ownership.

45level
Industry Consultants
Regulatory & Compliance
Change Management
Tech Specialists

Ready for next level results?

Our offices

  • Essen, Germany
    (Headquarter)
  • Sarajevo, Bosnia & Herzegovina
    (Rubicon Engineering Center)