Open to opportunities

Luka Jandrijevic

@lukajandrijevic

Message

I build reliable .NET payment systems that automate cross-border workflows and process high-volume transactions.

Croatia

Message

What I'm looking for

I'm looking to build reliable backend systems in banking, payments, or other high-volume regulated environments, where I can automate critical workflows, improve production reliability, and continue growing with modern .NET and AI-assisted development.

At Erste Bank, I automate Non-SEPA payment workflows with .NET 8 microservices, increasing straight-through processing by approximately 50%. I also maintain pension disbursement systems and Blazor tooling for payment operations in a regulated banking environment.

Previously at Nexi Group, I built backend services for 3-D Secure card-payment authentication handling around 200,000 transactions daily, supported live production traffic on-call, and delivered maintainable tested services. I also developed full-stack .NET and Angular applications at Span and earned second place in a Microsoft-organized GenAI competition.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Erste & Steiermärkische Bank d.d.

Jan 2026 - Present (7 months)

Increased straight-through processing (STP) rate of Non-SEPA payments by ~50% by automating end-to-end payment workflows with .NET 8 microservices. Optimize and maintain pension disbursement application and build Blazor-based internal tooling for payment operations.

.NET 8+C#Blazor Microservices PostgreSQL COBOL AI assisted Development

Software Developer

Nexi Group

Nov 2023 - Dec 2025 (2 years 1 month)

Designed and developed backend .NET services for a high-availability card payment authentication platform handling ~200,000 transactions daily. Served in on-call rotation for production systems, troubleshooting and stabilizing live payment traffic.