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Hi, I am Janko Šajić, a software developer from Belgrade with hands-on experience in .NET, C#, and architecting scalable systems. I enjoy turning complex requirements into robust, maintainable solutions using modern technologies and best practices. I am especially fascinated by artificial intelligence and machine learning, and I am eager to apply these skills to real-world problems. My hobbies are taekwondo and hiking, which keep me active and focused.…Hi, I am Janko Šajić, a software developer from Belgrade with hands-on experience in .NET, C#, and architecting scalable systems. I enjoy turning complex requirements into robust, maintainable solutions using modern technologies and best practices. I am especially fascinated by artificial intelligence and machine learning, and I am eager to apply these skills to real-world problems. My hobbies are taekwondo and hiking, which keep me active and focused.

Janko Šajić

Web Developer, Programmer, Back-End Developer, +6

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Hi, I am Janko Šajić, a software developer from Belgrade with hands-on experience in .NET, C#, and architecting scalable systems. I enjoy turning complex requirements into robust, maintainable solutions using modern technologies and best practices. I am especially fascinated by artificial intelligence and machine learning, and I am eager to apply these skills to real-world problems. My hobbies are taekwondo and hiking, which keep me active and focused.…Hi, I am Janko Šajić, a software developer from Belgrade with hands-on experience in .NET, C#, and architecting scalable systems. I enjoy turning complex requirements into robust, maintainable solutions using modern technologies and best practices. I am especially fascinated by artificial intelligence and machine learning, and I am eager to apply these skills to real-world problems. My hobbies are taekwondo and hiking, which keep me active and focused.

Available to hire

Hi, I am Janko Šajić, a software developer from Belgrade with hands-on experience in .NET, C#, and architecting scalable systems. I enjoy turning complex requirements into robust, maintainable solutions using modern technologies and best practices.

I am especially fascinated by artificial intelligence and machine learning, and I am eager to apply these skills to real-world problems. My hobbies are taekwondo and hiking, which keep me active and focused.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Serbian

Fluent

English

Advanced

Work Experience

Junior Programmer at Petrol Soft d.o.o.

January 1, 2022 - October 26, 2025

Developed C#/.NET applications for oil company operations, including cash register apps; built web applications using ASP.NET framework and Visual Studio; collaborated with team using Git for version control.

ERP System Developer at Net Technologies

January 1, 2023 - October 26, 2025

Design and development of an ERP system using Microsoft technologies, including Azure, Power Automate and AI to support a multidisciplinary company and wholesale operations.

Software Developer at MTS - sistemi i integracije

January 1, 2023 - Present

Migrated a legacy monolithic application to a microservices-based architecture; maintained and developed new features with .NET technologies, ensuring reliability and efficiency.

Junior Programmer at Petrolsoft d.o.o.

December 31, 2022 - October 26, 2025

Developed applications in C#/.NET for oil company operations, including a cash register application. Used ASP.NET for web applications; worked in Visual Studio, Git, and integrated with existing systems and databases to enable automation and reduce manual work. Implemented analytical algorithms to optimize processes and improve sales efficiency; designed scalable architecture to support a large number of users.

Software Developer at MTS - sistemi i integracije

January 1, 2024 - October 26, 2025

Migrated a legacy monolithic application to a microservices-based architecture, improving scalability and system performance. Maintained and developed new features for the application using .NET technologies, ensuring reliability and efficiency.

Software Developer at B2BEE d.o.o.

January 1, 2024 - Present

Worked on the development of an application to increase sales at B2BEE. Contributed to the ongoing development and feature enhancements to support business growth.