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Last updated: September 1, 2015
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  1. Susana Ramallo

    Susana Ramallo

    Ruby on Rails Developer, Data Mining and Magic/UniPaas expert

    Mexico - Tests: 4

    With over 20 years of experience building GUI and Web applications using SQL Databases (MS SQL, Mysql, Postgres, Pervasive, Oracle) my goal is to help you realize your world-class project. Also I have a master on Data Mining and knowledge discovery and experience on: * Microsoft Analysis Services * Data Warehouse * R * Predictive Analytics tools * Scientific Data systems I started working on Ruby on Rails 12 months ago. Last my timezone is CST. Im located in Mexico and I have a B1 US visa so I could visit the team locally.

    $22.22 /hr
    0 hours
  2. Jorge Vazquez

    Jorge Vazquez

    Data Analyst\Programmer


    Professional with over four years' experience in IT consultancy. Last projects are related to database administration with PostgreSQL and PHP, and data analysis/graphical representations in Excel (and VBA) and R software

    $23.33 /hr
    180 hours
  3. 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
  4. David Stephens

    David Stephens

    Data Analyst

    United Kingdom - Tests: 2

    Hello, I am a Data Analyst with 5+ years professional experience with a background in scientific research including publishing peer-reviewed papers. I have BSc (1st class honours) in Geographical Information Systems and Science. I am most interested in contracts that would take advantage of my R skills for data analysis and visualisation. Including: geospatial analysis, statistical modelling, data mining or building shiny data apps. A summary of my skills and experience: - Diverse types of research including geospatial analysis, statistical modelling, image analysis, GIS. - Daily use of R with experience of packages such as: dplyr, ggplot2, caret, sp, rgdal, gstat. - Developing interactive data tools using R’s ‘Shiny’ framework - Also have experience scripting in Python and SQL Statisitcs: - Linear regression, principal component analysis, t-tests. - Machine learning algorithms (random forest, neural networks) - Cluster Analysis (unsupervised classification) - Non-parametric significance testing (monte-carlo simulations) - Geo-statistical Interpolation (kriging) Other: - Image Analysis: Object-based image segmentation - Textural analysis for pattern recognition - Working with PostgreSQL/postGIS databases - Software: ESRI ArcGIS; Erdas Image; GRASS; QGIS; eCognition; SPSS.

    $35.00 /hr
    0 hours
  5. 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
  6. Maxim Semyonov

    Maxim Semyonov

    Rapid Application Developer


    7 years of professional work experience in financial software development. Interested in data anaylsis, data processing, research projects.

    $38.89 /hr
    0 hours
  7. Vinay Sawant

    Vinay Sawant

    BigData Hadoop Developer/Analyst/Data Scientist

    India - Tests: 1

    • BigData Hadoop Certified • Certifcation of HBase by IBM from BigDataUniversity. • Certifcation of Data Analysis using R from BigDataUniversity. • IBM Pig Certified from BigDataUniversity • IBM Hive Certified from BigDataUniversity • JAQL Certified by IBM from BigDataUniversity. • Knowledge in Big Data Hadoop and its components like HDFS, Map Reduce, Apache Pig,Hive, Sqoop, and HBase,Phoenix. • Knowledge of Setting up Hadoop Cluster (Single and Multi Node in Ubuntu) • Knowledge of installing writing the Pig scripts to reduce the job execution time • Currently pursuing Certification course of Data Science from Coursera • Currently pursuing Certification course of Machine Learning from Coursera by AndrewNG • Currently pursuing Certification course 15.071X, THE ANALYTICS EDGE- Analytics! • Currently pursuing Certification course of Practical Machine learning from Coursera

    $13.33 /hr
    32 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