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Ognyan Obretenov

and invite this freelancer
Flag of Bulgaria Plovdiv, Bulgaria
It's currently I'm Online! I'm Offline
Member since March, 2011

Programmer with more than 20 years of experience in C,C++, C#, , SQL Database design Assembler PLC, CNC

5.0 / 5
5.7 / 10

@oobretenov

  • 88%Jobs Completed
  • 99%On Budget
  • 99%On Time
  • 32%Repeat Hire Rate

Recent Exams

  • Freelancer Orientation Top 2%
    85%
  • Visual Basic Top 2%
    83%
  • ADO.NET 1 Top 3%
    83%
  • Numeracy 1 Top 3%
    98%
  • SQL Level 2 Top 7%
    80%
  • MySQL Level 1 Top 10%
    80%
  • VB .Net Level 1 Top 14%
    75%
  • C 3 Top 17%
    88%
  • C++ Level 1 Top 22%
    78%
  • Data Structures Top 28%
    58%
  • C# 1 Top 35%
    75%
  • Linux Kernel 1 Top 50%
    65%
  • US English Level 1 Top 55%
    85%

Top Skills

  • Assembly
  • x86/x64 Assembler
  • C Programming
  • Microcontroller
  • C++ Programming
  • PLC & SCADA
  • C# Programming
  • Arduino
  • Visual Basic
  • Linux
  • Microsoft Access
  • Database Programming
  • .NET
  • Windows Desktop
  • Android
  • SQL
  • Algorithm
  • Web Scraping
  • Visual Basic for Apps
  • Software Development
+ show more

Recent Reviews

  • image of studentbrave Important Task $100.00 USD

    “Good Project”

    studentbrave Flag of Pakistan 2 hours ago.
    • C Programming
    • Microcontroller
    • PLC & SCADA
    • Hire me
    • Assembly
    • x86/x64 Assembler
  • image of suddndaze Arduino and 4Dsystems Display $155.00 USD

    “Excellent Job. Oobretenov knows his stuff. Code was done on time. Will hire again.”

    suddndaze Flag of United States last week.
    • Microcontroller
    • Arduino
    • 4D
  • image of saaher12 hcs12 calculator $50.00 USD

    “Bad. Do not work with him”

    saaher12 Flag of United States 2 months ago.
    • Assembly
  • image of htempacc Write some Software $150.00 USD

    “A pleasure to work with. Would hire him for any projects pertaining to C++ and Assembly. very knowledgeable, keeps you updated and adjust accordingly to your demands. Would recommend 10/10.”

    htempacc Flag of United States 2 months ago.
    • C++ Programming
    • x86/x64 Assembler
  • image of studentbrave TASK IMPORTANT2 $45.00 USD

    “The work I needed was vague, and unfocused--I needed frequent communication and strong analytical skills. He was available over chat for any questions, and communicated advice.”

    studentbrave Flag of Pakistan 2 months ago.
    • C++ Programming
    • Hire me
  • image of mateuszblommaert asm 86 programming $170.00 USD

    “Fantastic work, very experienced and professional. Finished the project a lot before time. I would definitely hire him again.”

    mateuszblommaert Flag of Belgium 2 months ago.
    • Assembly

Experience

Manager

Feb 2012

I am manager of Software Development Company

Manager

May 1995 - Jan 2012 (16 years)

Lecturer

Oct 1990

I am lecturer in department of Computer System.

Education

Master

1985 - 1990 (5 years)

Certifications

TCP/IP Networking (1993)

Tcp/IP Networking

Publications

CANOPEN PROTOCOL for comunication between pc-based CNC and DIGITAL SERVO DRIVES

CANOPEN PROTOCOL for comunication between pc-based CNC and DIGITAL SERVO DRIVES

Badges

  • Quick Pick

    Award your project within 24 hours of posting
  • The Giver

    Award your project to a Freelancer.
  • Simply the Best

    Complete 5 or more projects, with a 95% completion rate.
  • The Multi-tasker

    Complete 40 projects.
  • The Cap-tain!

    Reach the level 20 level cap!
  • Deck the Halls

    Participated in the 2013 twelve days of Freelancer Festivities
  • Mover and Shaker

    Create 50 Milestones.
  • Smooth Operator

    Complete 10 projects on time.
  • Perfectionist

    Receive 5-star ratings in 90% of your completed projects (minimum 10 projects).
  • Feedback Guru

    Receive 10 reviews
  • The Enforcer

    Reporting a project or contest that violates our terms of service.
  • Frequent Visitor

    Log in in every day for 1 month.
  • The Economist

    Complete 10 projects on budget.
  • The Regular

    Log in every day for 1 week.
  • Nine-to-Fiver

    Win a project and accept the offer.
  • The Critic

    Post 10 Reviews.
  • Millenium Proposal

    Bid on 1000 projects.
  • The Speculator

    Sponsor 1 bid.
  • The Investor

    Post a featured project.
  • Essential Credentials

    Update your account details 100%
  • Pro-Profile

    Complete your Profile 100%.
  • US English Qualified

    Pass the US English Exam (Level 1)
  • The Adventurer

    Complete your first project.
  • Smart Money

    Create 10 Milestones.
  • The Spartan

    Bid on 300 projects.
  • All Star

    Receive a 5-star rating for a project.
  • Spread the News

    Invite 10 friends to join Freelancer.com
  • The Biller

    Create an hourly invoice.
  • Fast Responder

    Bid within 2 minutes of a project being listed.
  • The Collector

    Reach a balance of 5,000 credits.
  • The Verified

    Verify your payment method
  • The Prospector

    Post your first project.
  • The Perfectionist

    Edited a bid.
  • Grand Tourer

    Visit all recommended features that Freelancer.com offers
  • The Seeker

    Bid on 20 projects.
  • Deck the Halls

    Participated in the 2013 twelve days of Freelancer Festivities
  • Mover and Shaker

    Create 50 Milestones.
  • Millenium Proposal

    Bid on 1000 projects.
  • The Collector

    Reach a balance of 5,000 credits.
  • Simply the Best

    Complete 5 or more projects, with a 95% completion rate.
  • The Multi-tasker

    Complete 40 projects.
  • The Cap-tain!

    Reach the level 20 level cap!
  • Smooth Operator

    Complete 10 projects on time.
  • Perfectionist

    Receive 5-star ratings in 90% of your completed projects (minimum 10 projects).
  • Frequent Visitor

    Log in in every day for 1 month.
  • The Economist

    Complete 10 projects on budget.
  • Smart Money

    Create 10 Milestones.
  • The Spartan

    Bid on 300 projects.
  • All Star

    Receive a 5-star rating for a project.
  • Grand Tourer

    Visit all recommended features that Freelancer.com offers
  • Quick Pick

    Award your project within 24 hours of posting
  • The Giver

    Award your project to a Freelancer.
  • Feedback Guru

    Receive 10 reviews
  • The Enforcer

    Reporting a project or contest that violates our terms of service.
  • The Regular

    Log in every day for 1 week.
  • Nine-to-Fiver

    Win a project and accept the offer.
  • The Critic

    Post 10 Reviews.
  • The Speculator

    Sponsor 1 bid.
  • The Investor

    Post a featured project.
  • Essential Credentials

    Update your account details 100%
  • Pro-Profile

    Complete your Profile 100%.
  • US English Qualified

    Pass the US English Exam (Level 1)
  • The Adventurer

    Complete your first project.
  • Spread the News

    Invite 10 friends to join Freelancer.com
  • The Biller

    Create an hourly invoice.
  • Fast Responder

    Bid within 2 minutes of a project being listed.
  • The Verified

    Verify your payment method
  • The Prospector

    Post your first project.
  • The Perfectionist

    Edited a bid.
  • The Seeker

    Bid on 20 projects.