Aleksandar Hajduković
@aleksandarhajdukovi
.NET backend engineer building enterprise APIs, retail data synchronization, and medical SaaS services.
SloveniaWhat I'm looking for
At Kvadrati s.p., I build microservices-based solutions for clients and integrations. I work remotely with international teams as an independent contractor.
For Solve-X, I built enterprise APIs with .NET Core and reorganized the MSSQL stock-management database to support a tenant-ready model. I also optimized SQL queries, stored procedures, and table relations.
At Finiti Solutions, I developed backend services to synchronize product, financial, and document data between shops, central locations, and an ERP system. I also built .NET Core APIs and worked on complex MSSQL data models.
My contract work has also included .NET Core REST APIs and medical-device management services for MESI d.o.o., backend services for document management at Asseco SEE, and data pipelines and reporting services for Interenergo.
Experience
Work history, roles, and key accomplishments
Founder / Backend Contractor
Kvadrati s.p.
Jan 2014 - Present (12 years 10 months)
Building microservices-based solutions for clients and all sorts of integrations.
Senior .NET Core Backend Engineer
Big Bang d.o.o
Jan 2026 - Dec 2026 (11 months)
Built high-reliability enterprise APIs using .NET Core. Reorganized MSSQL database for stock management to be tenant ready and optimized SQL queries, stored procedures, and table relations.
Senior .NET Core Backend Engineer
MESI d.o.o.
Jan 2021 - Dec 2026 (5 years 11 months)
Designed and implemented .NET Core REST APIs for a medical SaaS platform, built backend services for medical device management and licensing, and supported multi-country scaling. Collaborated with frontend teams on API contracts and maintained service reliability in production.
Senior .NET Core Backend Engineer
Finiti Solutions
Jan 2024 - Dec 2025 (1 year 11 months)
Developed backend services for data orchestration and synchronization, integrating with ERP systems and managing document data across shops and central locations. Built high-reliability enterprise APIs using .NET Core and worked on complex MSSQL data models.
Senior .NET Core Backend Engineer
Asseco SEE
Jan 2022 - Dec 2023 (1 year 11 months)
Contributed to a national business registry platform and developed backend services for large document management systems. Built high-reliability enterprise APIs using .NET Core and worked on complex MSSQL data models.
Senior .NET Core Backend Engineer
Interenergo
Jan 2017 - Dec 2023 (6 years 11 months)
Built data acquisition and transformation pipelines, developed reporting services and scheduled backend jobs, and designed MSSQL data workflows for energy-trading operations. Focused on performance optimization and stability.
Education
Degrees, certifications, and relevant coursework
University of Ljubljana
Bachelor University degree, Electrical Engineering
Bachelor University degree from the Faculty of Electrical Engineering.
Tech stack
Software and tools used professionally
Availability
Location
SloveniaAuthorized to work in
Salary expectations
Job categories
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