Mariusz M.

Software Architect

Barcelona, Spain



What's the difference?

I'm a passionate software developer that specializes in C and C++ development.

Given my knowledge about efficient use of data
structures, algorithms and various programming idioms and techniques, I'm
capable of designing and implementing efficient, yet maintainable software from the ground up.

As a programmer, my goal is to participate in development of
interesting projects where I can provide significant help thanks to my
technical knowledge and experience.

Work History & Feedback

cryptographic stream program

“this job was done really well, I will be hiring Mariusz Marciniak for another job.No wonder Mariusz Marciniak is ranked as one of the best developers on odesk”
7 hrs @ $20.00/hr
Earned $133

Encrypt / Decrypt of files in directory

“Excellent programmer.”
20 hrs @ $17.00/hr
Earned $340

Bug fixing and software maintenance

“Mariusz is a very talented C++ developer. he requires very little guidance and is a true expert. We had to postpone the project but we will hire him again when we are able to move forward again.”
8 hrs @ $15.00/hr
Earned $120

Visual Studio C++ developer, Long term, FT work!

No feedback given
465 hrs @ $10.00/hr
Earned $4,647

HTTP Tunneling for C++ application

No feedback given

12 hrs @ $30.00/hr
Earned $360
Tests Taken
Name Percentile Score

Data Structures Test


Programming with C++ Test


Upwork Readiness Test for Independent Contractors and Company Managers