Company Leadership & Background

Built from Brokerage Frustration, Engineered for Scale

GST Software was founded in 2016 through a direct transatlantic partnership: an independent commercial insurance agency in Montana and a software engineering studio in Zagreb. We build cloud database tools and digital payment rails that replace administrative friction with speed.

Chief Executive Officer • Co-Founder
Toby Hansen

Toby brings 30 years of hands-on commercial insurance brokerage experience. He grew his agency in Missoula, Montana to over $7.5M in organic premium, serves on the Montana State Fund advisory board, and was a two-time President’s Council national award winner. He steers practical product workflows for QwikSubmit and ePayUs.

Lead Systems Architect • Co-Founder
Stjepan Zeljezic

With nearly 20 years in software engineering and cloud infrastructure, Stjepan manages hosting architecture and deployment across Microsoft Azure. Having led development teams and managed major European Union system integrations, he ensures high availability, encryption standards, and uptime for all active GST services.

Principal Software Architect • Co-Founder
Goran Pecur

Specializing in .NET Core, C#, and relational database design, Goran previously architected state-level public registry systems with over 20,000 active users. At GST Software, he authors core data models, replacement engines for static PDF forms, and real-time ledger reconciliation algorithms.

Chief Marketing Officer • Co-Founder
Tihana Damjanovic

With extensive background in international program communications and user experience strategy, Tihana oversees brand growth, product narrative, and UI design across the GST ecosystem. Her work connects software capabilities with industry audiences, including coverage in publications like Insurance Business America.

Infrastructure and Security Architecture

All GST Software platforms are hosted on Microsoft Azure, implementing the CIA (Confidentiality, Integrity, and Availability) security model for commercial enterprise operations:

Transport Layer Security TLS/HTTPS with SHA-256 and RSA 2048-bit encryption keys.
Database Hashing One-way salted password hashing and encrypted PII data at rest.
OAuth 2.0 Auth Rails Industry standard token authorization and optional 2FA controls.

Discover the GST Software Ecosystem

Explore how our cloud tools streamline commercial insurance submissions and modernize enterprise payment rails.