Profile image of cr4y

Krzysztof (Kris) Krej

and invite this freelancer
Flag of Poland Cracow, Poland
Member since September, 2010

I'm a professional developer with 8+ years of experience in creating various applications, simulations and games. I'm expert in areas: * Unity3D * Flash/Flex programming (including 3D, Alchmy, GPU calculations, XML, etc.) * Java (including SE and EE) * Linux/UNIX administration and scripting My portfolio can be found on my webpage ( ) and some more recent works are available on my youtube channel ( ). I hope we'll work together. Best regards, Kris

5.0 / 5
7.3 / 10

@cr4y

  • 95%Jobs Completed
  • 100%On Budget
  • 98%On Time
  • 26%Repeat Hire Rate

Recent Exams

  • Employer Orientation Top 1%
    90%
  • General Orientation Top 1%
    100%
  • Freelancer Orientation Top 2%
    85%
  • C# 2 Top 34%
    85%
  • US English Level 1 Top 38%
    90%

Top Skills

  • Unity 3D
  • Game Design
  • Adobe Flash
  • Software Architecture
  • XML
  • ActionScript
  • iPhone
  • C# Programming
  • iPad
  • Web Scraping
  • Flex
  • Algorithm
  • Mobile Phone
  • Android
  • Data Mining
  • 3D Animation
  • .NET
  • Linux
  • 3D Rendering
  • Animation
  • Software Testing
  • Flash 3D
  • Gamification
  • Java
  • JSP
  • Photography
  • Windows Desktop
  • System Admin
  • Data Processing
  • J2EE
  • Matlab & Mathematica
  • CAD/CAM
  • Building Architecture
  • Scientific Research
  • MMORPG
  • Photoshop Coding
  • Statistics
  • Mac OS
  • Biotechnology
  • Home Design
  • After Effects
  • Geolocation
  • UNIX
  • Blog Design
  • Commercials
  • GPS
  • 3D Modelling
  • Kinect
  • Imaging
  • Game Consoles
+ show more

Recent Reviews

  • image of Pantone1505 UNIT3D Programmer $2300.00 AUD

    “Great Freelancer! Really recommended! Great support and very patience, won't look anywhere else for the next project. Once again, Thank you very much Cr4y for your wonderful help and support :)”

    Pantone1505 Flag of Australia 11 months ago.
    • Javascript
    • C# Programming
    • Unity 3D
  • image of davidaragona Looking for 3D parking game developer $720.00 USD

    “Great guy! responsible and reliable!”

    davidaragona Flag of Georgia 1 year ago.
    • Adobe Flash
    • 3D Rendering
    • ActionScript
    • 3D Animation
    • Unity 3D
  • image of dylanneill Wingsuit BASE jump flight dynamics for Unity iPhone game $329.00 AUD

    “Kris and his team delivered a great result on this project. They completed everything well before the deadline and to a high standard. His English is very good, we never had any trouble with misunderstandings. I would definitely use him again for Unity 3D work.”

    dylanneill Flag of Australia 1 year ago.
    • iPhone
    • C# Programming
    • Unity 3D
  • image of nicmalta Unity 3d work needed (playmaker prefer) $250.00 USD

    “Good designer and programmer. Hire him !”

    nicmalta Flag of Malta 2 years ago.
    • Javascript
    • Game Design
    • C# Programming
    • Unity 3D
  • image of Isochron Private project for cr4y (17) £1276.00 GBP

    “Kris is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the future.”

    Isochron Flag of United Kingdom 2 years ago.
    • XML
    • Game Design
    • Software Architecture
    • MySQL
    • Unity 3D
  • image of Isochron Private project for cr4y (13) $740.00 USD

    “Kris is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the is just absolutely awesome. Very quick, great level of professionalism, high standard of work, and outstanding value for the rates he charges. I'll be looking to use him again for any work I can in the future.”

    Isochron Flag of United Kingdom 2 years ago.
    • XML
    • Game Design
    • Software Architecture
    • MySQL
    • Unity 3D

Experience

Freelancer

Oct 2010

After year of working as a freelancer in Poland I've decided to move on and work on AI and 3D (Unity and Flash) projects on

Owner

Jan 2010

After few years of working as freelancer, I've launched my own company.

Freelancer

Mar 2009 - Oct 2010 (1 year)

I've started my freelancer career using Polish alternative of freelancer.com. I was working on various Flash (2D & 3D) and UNIX projects.

Freelancer

Mar 2009 - Oct 2010 (1 year)

I've started my freelancer career using Polish alternative of freelancer.com. I was working on various Flash (2D & 3D) and UNIX projects.

Education

Bachelor

2007 - 2010 (3 years)

M. Sc., Eng.

2010 - 2012 (2 years)

Certifications

Scholarship for 1st year of study (2007)

Scholarship for 2nd year of study (2008)

Scholarship for 3rd year of study (2009)

Rector scholarship (2011)

Rector scholarship (2012)

Statement of Accomplishment: Gamification course (2012)

This course provided an introduction to gamification as a business practice, described relevant psychological and design concepts, and explains how to apply game thinking effectively in a variety of contexts.

Publications

AI-Based Simulation Of Herd Behaviour

About using artificial neural networks to simulate behaviour of multi-agent populations.

Creatrion of Environment for Fast AI Development in Unity3D

Paper about system for fast AI prototyping I've made. [My MSc thesis].

Badges

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    Edited a bid.
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    Win a project and accept the offer.
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    Complete your Profile 100%.
  • Smooth Operator

    Complete 10 projects on time.
  • The Collector

    Reach a balance of 5,000 credits.
  • Feedback Guru

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  • The Economist

    Complete 10 projects on budget.
  • Smart Money

    Create 10 Milestones.
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  • The Speculator

    Sponsor 1 bid.
  • Simply the Best

    Complete 5 or more projects, with a 95% completion rate.
  • All Star

    Receive a 5-star rating for a project.
  • The Adventurer

    Complete your first project.
  • Warren Buffet

    Complete a project worth over $1000 USD.
  • High Roller

    Complete a project worth over $500USD (or equivalent) on Freelancer.com.
  • Insta-Hire

    Use Hire Me to employ a Freelancer.
  • Deck the Halls

    Participated in the 2013 twelve days of Freelancer Festivities
  • The Collector

    Reach a balance of 5,000 credits.
  • Warren Buffet

    Complete a project worth over $1000 USD.
  • Smooth Operator

    Complete 10 projects on time.
  • The Economist

    Complete 10 projects on budget.
  • Smart Money

    Create 10 Milestones.
  • Simply the Best

    Complete 5 or more projects, with a 95% completion rate.
  • All Star

    Receive a 5-star rating for a project.
  • High Roller

    Complete a project worth over $500USD (or equivalent) on Freelancer.com.
  • The Regular

    Log in every day for 1 week.
  • The Perfectionist

    Edited a bid.
  • The Seeker

    Bid on 20 projects.
  • Nine-to-Fiver

    Win a project and accept the offer.
  • Pro-Profile

    Complete your Profile 100%.
  • Feedback Guru

    Receive 10 reviews
  • The Critic

    Post 10 Reviews.
  • The Verified

    Verify your payment method
  • The Speculator

    Sponsor 1 bid.
  • The Adventurer

    Complete your first project.
  • Insta-Hire

    Use Hire Me to employ a Freelancer.