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I am a junior programmer with experience spanning game development and enterprise systems. I have led and built game projects in Unity as a main programmer and game designer, and I have worked as a junior mainframe developer using COBOL on the z/OS system. I have a background in IT education and have taught programming to children. I thrive in teamwork, value time management, and enjoy blending technical precision with creativity to build well-designed software.…I am a junior programmer with experience spanning game development and enterprise systems. I have led and built game projects in Unity as a main programmer and game designer, and I have worked as a junior mainframe developer using COBOL on the z/OS system. I have a background in IT education and have taught programming to children. I thrive in teamwork, value time management, and enjoy blending technical precision with creativity to build well-designed software.

Natalia Kosteczka

Programmer, Game Developer, Game Designer, +2

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I am a junior programmer with experience spanning game development and enterprise systems. I have led and built game projects in Unity as a main programmer and game designer, and I have worked as a junior mainframe developer using COBOL on the z/OS system. I have a background in IT education and have taught programming to children. I thrive in teamwork, value time management, and enjoy blending technical precision with creativity to build well-designed software.…I am a junior programmer with experience spanning game development and enterprise systems. I have led and built game projects in Unity as a main programmer and game designer, and I have worked as a junior mainframe developer using COBOL on the z/OS system. I have a background in IT education and have taught programming to children. I thrive in teamwork, value time management, and enjoy blending technical precision with creativity to build well-designed software.

Available to hire

I am a junior programmer with experience spanning game development and enterprise systems. I have led and built game projects in Unity as a main programmer and game designer, and I have worked as a junior mainframe developer using COBOL on the z/OS system.

I have a background in IT education and have taught programming to children. I thrive in teamwork, value time management, and enjoy blending technical precision with creativity to build well-designed software.

Skills

Experience Level

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Polish

Fluent

English

Advanced

German

Intermediate

Work Experience

Intern Unity Developer at Beast Games S.A.

January 1, 2018 - December 31, 2022

Contributed to game development projects using Unity; collaborated with designers and other developers; gained hands-on experience with C# scripting, asset integration, and debugging.

Junior Mainframe Developer at Grafton Recruitment

June 20, 2023 - September 25, 2025

Developed and maintained COBOL/mainframe applications; learned z/OS environment, batch jobs, and data processing; collaborated with cross-functional teams.

Programming Trainer at Giganci Programowania

January 20, 2023 - March 20, 2023

Taught programming concepts and exercises to students; prepared lesson materials and guided practice sessions; supported learners in building foundational skills.

Developer / Project at Non-commercial Project: Death is Only the Beginning (Game Jam 2022)

May 1, 2022 - May 31, 2022

Participated in a game jam project; contributed to game design and implementation; focused on rapid prototyping and collaboration.

Project Developer at School project Ellie

October 1, 2019 - June 1, 2021

School project titled Ellie; worked on coding tasks; languages included COBOL, C#, and Unity; collaborated with peers to deliver functionality.