Rafał Olejniczak
R&D Developer

I spent 3 years working in R&D and have completed 5 projects during that time.

Although I’m a mid-C# developer, most of my commercial experience is working as an R&D developer.

Rafał Olejniczak, R&D developer at 4Experience

In a nutshell


Clients I worked with


Years of experience


Projects completed

My experience and completed projects

Here are the details of a few projects I’ve worked with as R&D Developer.

GSM & eSIM application (China, NDA)

My job: R&D and Main Programmer

My contributions:

  • preparing database and connecting it with cards production
  • making logs system
  • making crosscheck system

Tech stack: C#, C++, SQL, Data Processing Designer

GSM & eSIM application (Japan, NDA)

My job: R&D and Main Programer

My contributions:

  • researching ways to implement the complicated structure of checks and logs
  • simplifying existing structures and upgrading them in security fields

Tech stack: C#, C++, SQL, Data Processing Designer


Team of programmers discussing and running a software project

GSM & eSIM application (Asia, NDA)

This project involved many bigger and smaller clients from all around the globe but mostly Asia.

My job: R&D and Main Programmer

My contributions:

  • preparing databases and connecting them with cards production
  • making secure and fast personalization logs and crosscheck systems
  • helping technical consultants with data processing

Tech stack: C#, C++, SQL, Data Processing Designer

About me

Programing has been my hobby since i remember. I like researching new topics and technologies which makes my R&D role perfect suitable for me. Machine Learning and AI topics are most interesting to me.

I like games, both playing and developing them. One of my main hobbies and interests is Unity. But I am always ready and happy to learn new languages and environments.


My skills
> Unity
> Python, PHP
> C#, C/C++
> Git
> Visual Studio
> Agile

The tools we use

The main tool our team uses is Unity. We have a deep knowledge of that engine.

Tools such as Jira, Everhour and Shortcut are used to manage projects well.
Git, SourceTree and Plastic are our preferred choice for version control.

To communicate with clients we usually use Slack, Discord, Microsoft Teams, Google Meet and occasionally Skype.


Rafał Olejniczak

R&D Developer at 4Experience

Bachelor’s degree at Wyższa Szkoła Biznesu – National Louis University (Nowy Sącz)
Computer Science – Business Applications
10.2020 – 10.2023

Woman using laptop sitting on a pile of books