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Last updated: August 1, 2015
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  1. Andrey Ogurtsov

    Andrey Ogurtsov

    Biostatistician / R programmer

    Ukraine - Tests: 1

    Biostatistician with 3 years of experience. Favourite programming tools - R and SPSS. Performed works: • definitions of primary and secondary variables; • sample size calculations; • writing statistical analysis plans for phase I-IV and bioequivalence trials; • performing statistical analysis and writing statistical reports; • creating CRF; • data input and verification; • developing correspondent SOPs. STATISTICAL AND MACHINE LEARNING SKILLS: • classical methods of analysis; • general and generalized linear models; • non-linear modeling (splines, GAMs); • tree-based methods (bagging, random forests, boosting); • dimension reduction (PCA); • clustering (hierarchical, K-means); • cross-validation; • bootstrap; • multiple comparisons adjustments. PROGRAMMING SKILLS: • using R functions for wide range of statistical methods; • writing new R functions to implement desired functionality; • data wrangling with basic R functions and packages like reshape2; • data visualization (basic graphs and ggplot2); • automated report generation and reproducible research (knitr with R Markdown or LaTeX); • interactive presentations with shiny, rpanel and googleVis; • SPSS (both GUI and syntax); • SQL (basic knowledge).

    $10.00 /hr
    0 hours
  2. Heather Turner

    Heather Turner

    Statistical Consultant/R Programmer

    United Kingdom - Tests: 1 - Portfolio: 10

    Motivated and reliable PhD-qualified statistician with internationally recognised expertise in R programming. Over ten years experience providing statistical and programming support to investigators in statistics, social science, drug discovery, bioinformatics and agriculture.

    $100.00 /hr
    16 hours
  3. Marek C.

    Quantitative analyst, R, matlab, Data scientist


    I am looking for challenging problems that require mathematical skills, ingenuity, programming skills, and deep and original thinking. I worked for a few different companies and always on very interesting problems. I am looking for project in the areas of algorithms, machine learning, probability, stochastic methods, signal processing, data compression, predictive methods, mathematical methods in finance, high frequency trading strategies, genetic algorithms. risk analysis, adaptive learning algorithms, discovery of patterns, data analysis, evolutionary computation. Learning classifiers, wavelets and all preditictive methods ( svm, hidden Markov models, neural networks) applied in financial markets. I spent also a lot of time developing trading strategies in different markets, using machine learning algorithms, genetic programming. My favorite tools are matlab and R.

    $28.89 /hr
    55 hours
  4. Thomas Kuilman

    Thomas Kuilman

    R developer

    Netherlands - Tests: 1

    I have developed excellent R skills over the past year in my professional career, where I have written an R package for scientific use (see below for link to GitHub page). I am new to developing for clients, but regard this an exciting opportunity to apply my R programming skills in a professional environment. In addition to programming in R, I also have some experience in programming in Python, Javascript, HTML and CSS. I have excellent communication skills, I am eager to learn and looking forward to this opportunity.

    $12.00 /hr
    0 hours
  5. Ondrej Vostal

    Ondrej Vostal

    R, Mathematics, Perl, Linux

    Czech Republic

    I'm looking forward to work with you. I have been working as a part time programmer & linux administrator for seven years. I'm able to use lots of standard and even many excentric UNIX utilities, which enables me to complete system administrative jobs quickly and brilliantly. I wield many programming languages which again enables me to choose the right one for your task, which results in clean, short and expressive source. I always write complete and concious documentation.

    $30.00 /hr
    0 hours
  6. Tom L.

    Tom L.

    Data scientist, Python, R Programmer

    Canada - Tests: 9 - Portfolio: 2

    Over the last 12 years, I worked as research assistant/associate in data analysis. I developed algorithms in processing and performing statistical analysis using R, Perl, Java. I am proficient in various Microsoft Office Applications especially MS Excel, MS Word, and MS Powerpoint. I have strong oral and written communication skills. I am a strong self-starter and able to work well independently. I am hardworking and can work effectively as fast as I can.

    $37.00 /hr
    32 hours
  7. Luke Green

    Luke Green Agency Contractor

    R-Programming and Statistics Consultant

    United States - Tests: 9 - Portfolio: 4

    I am an honors double major in Mathematics and Applied Math/Statistics at Stony Brook University and founder of Vivaldi Analytics, a small data analysis startup based on Long Island. I have a large amount of experience with R - specifically machine learning algorithms, data visualization (using ggplot2 primarily), and data cleaning. I've been working as a statistics consultant both independently, and for my company for the past year. I've completed work for a variety of individuals and companies, such as the Faculty-Student Association at Stony Brook and StatSocial ( ). I also have experience creating data analysis applications using R Shiny. For some examples of my past projects, please see: You can also try out a free version of Violin, one of my company's survey analysis products here: If you have any questions about my services, please contact me on Skype at luke.green853.

    Associated with: Vivaldi Analytics Inc.

    $55.00 /hr
    12 hours
  8. Tetyana Sopronyuk

    Tetyana Sopronyuk

    VBA/R/C/C++ Programmer

    Ukraine - Tests: 3 - Portfolio: 1

    R, C/C++, Good knowledge of mathematics. Passed 7 courses of Data science specialization at Coursera (Data Science Tools, R programming, Getting and cleaning data, Exploratory data analysis, Reproducible research, Statistical inference, Regression models). Last two courses - Machine learning and Developing data products - would be finished by the end of August. Passed course of Beginning Game Programming with C# at Coursera. Conduct lectures and laboratory classes with students in such courses: - Object-oriented programming in C++; - Automata theory and formal languages; - VBA and VB .NET; - Mathematical modeling of systems with impulse influence.

    $11.11 /hr
    0 hours
  9. Ahsan shafiq C.

    Ahsan shafiq C.

    Top Game Developer / Data Scientist & R Developer

    Pakistan - Tests: 2 - Portfolio: 5

    I have 5+ years of experience in Software Development and Design in various leading technologies. I have worked for International Customers and helped them growing their business and expanding the profitability. Over the last 5 years, I have developed a wide range Mobile applications, which include iPhone/iPad/Android/J2ME. I have developed both games and eCommerce applications for iPad/iPhone. I have Masters Computer Science with focus on Data Mining and Machine Learning. I have been doing statistical data analysis in R for 2+ years now and have experience working with a variety of single/multiple regression, multi class classification and clustering techniques. I have been involved in development of: - Ruby on Rails - iPhone/Android Native Applications for the Enterprise - iPhone/Android Games Specialties: iPhone SDK / Android / J2ME / Symbian / BREW / BlackBerry Cocos2d / Cocos2d-x / Unity3D / OpenGL ES / Quartz 2D Box2d / Chipmunk Ruby on Rails (ROR) C / C++ / Objective-C / Cocoa Framework / C#

    Groups: Application Developers Alliance

    $30.00 /hr
    3,493 hours
  10. waldemar kwasniewski

    R Programmer, data science, data mining


    I am an experienced R programmer and data analyst, ready to use my knowledge, practice and interest in data science to find a quick, reliable and clever way to perform any task you have to be done. I can help you to extract actionable knowledge form your data, find dependencies, build predictive models, translate your concepts into formulas, and your ideas into algorithms. My main fields of expertise are: • data mining and cleansing - fluent in extracting useful data using fast and flexible tools; • market analysis, statistical computing - finding patterns in data to gain interesting insight, based on solid statistical knowledge and visualised in an approachable way. I strive for excellence in each aspect of the project, guaranteeing maximum focus on detail, providing a solution tailored to the customer's expectations and top-class communi I am looking for projects in mathematics, machine learning, signal processing

    $22.99 /hr
    0 hours