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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. Fangping M.

    Machine Learning, Data mining, R scripting

    United States - Tests: 2

    Good knowledge and experience in Statistical Modeling, Machine learning/Data Mining • ANOVA, Generalized Linear Models, False Discovery Rate Control • Supervised: Linear Regression, Logistic Regression, Support Vector Machine, Random Forests • Unsupervised: Clustering, Principal Component Analysis, Abnormal Detection Familiar with R markdown.

    $30.00 /hr
    13 hours
  4. 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
  5. Aaron M.

    Aaron M.

    Data Scientist:Machine Learning, Statistics, R, Python, Java, VB/Excel

    United States - Tests: 5 - Portfolio: 1

    I work with clients on defining, implementing and managing data analysis and data management projects. My expertise lies at the intersection of Statistics, Computer Science and Business acumen. Specific areas of interest to me are education, healthcare, finance, real estate, and energy. Analysis: R (statistics), Python (data munging), Java+Scala (machine learning / big data), VB.NET/Excel (financial modelling) ** Apache Hadoop, Hive, Spark with MLlib (big data ecosystem) ** MongoDB, Neo4j (NoSQL) + MySQL, Monetdb (SQL) ** Gephi (networks/social graph processing) ** Weka (machine learning) Visualization: Tableau (rapid dashboarding), Shiny (R package for interactive statistical dashboards) Environments: Linux, Windows, and Mac (least experience) Productivity: Git (source code control) Web Applications: Play 2 Framework (modern Java/Scala-based, reactive websites) I believe the key qualification to be a Data Science practitioner is an analytic and curious mindset. That said, many hiring decisions seem to hinge on specific skills. Let me know if there's a tool or technology you don't see on my list, and I'll let you know if I've worked with it before.

    $200.00 /hr
    958 hours
  6. Jerry Rd

    Jerry Rd

    Data Scientist/ DataMining Expert/ AlgorithmResearch&Implementation

    China - Tests: 5

    I have a master degree of probability and statistics.. I am a R guru. I have 6+ years experience of using R/SAS for statistical analysis and data mining/machine learning. I love my work as statistical algorithm research and implementation. And I am a hard working people. I have done projects in several industries such as Web Research/ Web Application/ Marking/ Financial Strategy/ Medical/ Commercial/ Sports industry. Also I am familiar with C/Perl/Python/Mysql/PosegreSQL/Latex/Javascript. I like to solve problems for my client, please feel free to contact me if you are interested in my skill set. Look forward to hearing from you!

    $33.33 /hr
    383 hours
  7. Billel H.

    Billel H.

    Master's Degree in Computer Science

    Algeria - Tests: 18 - Portfolio: 2

    An outline of my skills and experiences will show what I have to offer, I am professional in: -Web Development : html5, xhtml, CSS, PHP, JavaScript , jQuery, Resposnive Web Design, SEO, xml, ASP.NET using C# and VB -Integrated development environment (IDE): Microsoft Visual Studio 2010, Netbeans, Eclipse, Adobe Dreamweaver CS6. -Database: SQL, SQL server 2008R2, MySQL, Oracle Database, PostgreSQL and Data warehouse. -Programming language: C# ,java , python, Visual Basic, C++. -Office Suite: Microsoft Office (Word, Excel, PowerPoint, Access and Outlook), SharePoint. -Design and Multimedia: Adobe Creative Suite CS6 (Photoshop and Acrobat X Pro). -Operating System: Windows(XP, Vista, 7,8), Linux(Ubuntu, Red Hat), IOS. -Networking: Open Systems Interconnection (OSI) model, Internet protocol suite (TCP/IP) model, LAN, VLAN, WAN, DNS, DHCP, switch, Access point and Router Configuration. -Modeling language : Unified Modeling Language (UML) and Merise. -Architecture and Mechanical engineering: Technical drawing, Architectural drawing. -Management: Human Resource management. -languages: English, French and Arabic. I am at your disposal to DO THE BEST.

    $25.00 /hr
    82 hours
  8. Tim Van Boxtel

    Tim Van Boxtel


    Canada - Tests: 7

    A skilled technophile with experience in many aspects of hardware and software. Sotware: Web Application Development utilizing Flask and Django REST Based API Skilled Python developer Website Development - PHP, HTML5, CSS3, Javascript, jQuery Database Query, SQL, Cypher, Hardware: Electronic Circuit Design. Schematic - PCB I take great care in the quality of my work and forward my rigour and passion onwards

    $61.11 /hr
    414 hours
  9. 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
  10. Guangming L.

    Guangming L.

    Data Scientist and R Expert

    United States - Tests: 7 - Portfolio: 5

    I'm a data scientist and expert R programmer with 7 years of experience. I specialize in solving mission critical business problems using advanced data analysis, machine learning and web technologies. I'm known for quick turn-around and excellence amongst my clients. I live in Ann Arbor, Michigan, USA (time zone: EST). I'm passionate about finding insights from data and making beautiful data products. In particular, I'm very competent at 1. data scraping 2. data wrangling 3. descriptive & exploratory analysis 4. data visualization 5. inferential & predictive analysis 6. pattern recognition and clustering 7. supervised & unsupervised machine learning algorithms 8. building analytic web apps 9. the R programming language Some of my recent for-fun projects include a couple of analytic web apps and a book on how to do data analysis using R. They are listed under the portfolio section below. Make sure you check them out. I also love to teach people how to use R to do data analysis, and I do that through, an online community where you can receive high quality training materials for FREE. I used to work for FICO, where I built scorecards for the Picture People to predict customer response rates to their marketing campaigns. My scorecards doubled their ROI. I also built customer segmentations for Canadian Tire Bank. It gave the executive team a holistic view of their customers for the first time. I have a master's degree in Biostatistics from the University of Michigan and a bachelor's degree in mathematics from the New College of Florida. I'm an avid MOOC taker, constantly learning new things in the field. I took all the courses in data science, statistics, data mining and machine learning from Coursera, Udacity, Edx, and Khan Academy. I have strong work ethics and respond to all my messages in less than 12 hours. Contact me if you need help with analyzing data. Have a great day! -Guangming

    $100.00 /hr
    611 hours