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On average, 38 Data Science projects are completed every quarter on Upwork.


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Last updated: October 1, 2015

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Jeffrey S.

Jeffrey S.

Data Scientist, Project Manager and Labview Developer

United States - Tests: 3

I have deep experience working with large data sets to solve complex problems. My background includes working in the areas of Bayesian statistical analysis as well as predictive analytics, business intelligence, data modeling and forecasting. I have worked used my skills in a variety of industries such as energy, manufacturing, finance and aerospace. I also have more than a decade of development experience, primarily with National Instruments Labview, as well as many years of project management experience and my PMP certification.

$67.00 /hr
9 hours

Alexander T.

Alexander T.

Software Engineer

Ukraine - Tests: 4

I have 10 years of experience in different areas of software development. My most recent experience lies in field of backend development of horizontally scalable solutions for data processing. During last 2 years I have been developing from scratch proprietary framework similar to Apache Hadoop and Spotify Luigi for batch data processing (billions of log records of ad data daily). I used Python as core language to promptly prototype data analytics business logic with a goal to rewrite it in native language without API changes later. This project also involved managing NoSQL databases (TokuMX or MongoDB 3+ with an appropriate storage engine) to process, aggregate and store massive (hundreds of millions daily) number of documents, indexed for further statistical analysis and reports generation. I also have experience in the following areas: - development of web backends in Python using uWSGI and Tornado frameworks - automation of code building and deployment, Vagrant, Docker - C# language and some experience in Java and C/C++ I am an open-minded technology enthusiast with strong algorithmic and mathematical background and keen attention to details. New language, technology or framework required for next project is not a problem to learn at all. I am ready to show positive, constructive and helpful attitude to your tasks.

$25.00 /hr
216 hours

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

Rob Chambers

Rob Chambers

Python expert and scientific software architect

United States - Tests: 2

I'm a highly trained, expert engineer with excellent academic and industrial credentials. American, native English speaker. My degrees are in Mechanical Engineering, but I've found that my true love is software development. I love working on teams with other passionate and technically savvy people, but I have plenty of experience in management and report-writing. I am currently in the midst of long-term world travel, so I'm looking for quarter- to half-time freelancing work. I can work sporadically and long-term, but I can also settle down temporarily and put in very heavy hours when needed. I'm an expert Python programmer (5+ years experience) and I have several years combined experience in other languages as well (HTML/JS/CSS, MATLAB, C/C++). I am a full stack developer, with experience administering on-site and cloud servers, writing server-side and client-side software, developing complex and parallelized data processing algorithms, and implementing web- and desktop-based UIs. I have worked on many small projects where I am the sole developer, but I have also led 5-10 person teams to develop larger systems. As a mechanical engineer turned software developer, I have a special interest in working at the intersection of software with math, science, and engineering. Fields of interest: Biology, numerical simulation, algorithms, software development. Particular competencies: Taking ownership of solutions from conception to delivery... problem specification, algorithm development, software implementation, testing, and distribution. Skills/tools Python (including Numpy, Scipy, Pandas, Scikit-Learn, Cython, SQLAlchemy, Enthought Traits, Anaconda, IPython Notebooks, etc.). Web and Hybrid Mobile App development (HTML/JS/CSS; AngularJS; Cordova, Ionic), MATLAB (including many toolboxes). Experience building and administering Amazon Web Services (AWS) systems. Comfortable with Windows, OS X, and Linux.

$75.00 /hr
13 hours

Ilia K.

Ilia K. Agency Contractor

Senior Professional in Business Intelligence, Data Analysis

Belarus - Tests: 1 - Portfolio: 3

9 years Business Intelligence, Data Warehousing, Data Analysis SAP experience: BI / BW, BO, HANA non-SAP: R programming Over 10 years of practical experience in IT consulting, business analysis, software development Roles: Freelance Contractor, Team lead, Architect, Project manager

Associated with: Altasapiens

$40.00 /hr
0 hours

Volodymyr Kostanda

Volodymyr Kostanda Agency Contractor


Ukraine - Tests: 42 - Portfolio: 41

Owner and CEO at AdoriaSoft LLC. AdoriaSoft offers full cycle software development services and implements all stages of projects for our customers: - Research and estimation - Requirements definition - Architecting - Development - Graphical design and User experience design - QA - Support and updates Platforms that we develop for: - iOS (iPhones and iPads of different versions) - Android phones and tablets - MacOS - Web - Windows desktop - Windows Server - Windows CE - Windows Mobile PPC and SP 5.0, 6.0, 6.5, 7 editions We - have different real devices for testing (Android phones and tablets, iPhones, iPads of different generations, Macbooks, etc), no emulators. - work with both native and crossplatform frameworks - use an established design/development/testing lifecycle, follow scrum - have our own development servers with tasks management system (JIRA), source control (Git), continuous integration and build server (Bamboo), etc. - can easily work with time zones like PST, EST, etc. - offer high quality and cost effective solutions for our customers Technologies/Languages/Libraries/Frameworks: - ObjectiveC, iOS SDK, Mac OS SDK, XCode - Java, Android SDK - C++, STL, Boost, ATL, WTL, COM, MFC - Windows API, DirectShow, DirectSound, Sockets, Completion Ports, OLEDB, TAPI, GDI - C#, Managed C++, ASP.NET, LINQ, ADO.NET Entity Framework, WPF, Compact Framework, Mono.NET, Monotouch, Xamarin - Appcelerator Platform, Titanium, PhoneGap - MS SQL Server, T-SQL, Oracle, MySQL, NoSQL, MongoDB - Cloud platfoms: Amazon Web Services ( AWS ), Microsoft Azure - Web technologies: REST and SOAP web services, JavaScript rich client libraries, HTML5, CSS3 Our competences: - business automation software - System utilities for MacOS, Windows and mobiles platforms - Information security, cryptography, steganography - client-server applications - Wireless 3G/4G, Bluetooth, WiFi applications - VoIP, voice codecs, data signal processing - Complex Web applications and portals (ASP.NET, PHP, REST web services, JavaScript rich clients)

Groups: Application Developers Alliance

Associated with: Adoriasoft

100% Job Success
$29.00 /hr
15,504 hours

Rob H.

Rob H.

Expert Infrastructure Architect and Data Integration w/Biz background

United States - Tests: 4

I have over 19 years experience in the IT field. My main experience is with iSeries(AS/400) at a senior engineer/architect level. I have a very deep background in performance analysis, OS support, upgrades, and configuration. I also have an expert background in Information Management that includes data governance assessments and implementations. I have experience with Infosphere CDC(DataMirror), Information Server, DataStage, QualityStage, Infosphere Discovery. I am looking for opportunities to assist you with my data management skills on all platforms(not just iSeries). Also experience with HMC, Oracle 10 and 11g(RAC), CDC, DB2, Solaris, Tru64 Unix, MPE, HP3000, Control-M, iDoctor, Performance Explorer(PEX), MB Performance Tools, Performance Navigator, Websphere MQ, Mimix, iTera, BRMS, DBMon, Visual Explain, Tibco, Aldon, MKS Implementer, Robot, MAPICS, Interactive Voice Response systems(IVR), PKZIP, Java, CL, RPG, ILE, Toad.

$22.22 /hr
2 hours

Yuriy Smirnov

Yuriy Smirnov

Data integration proficient, Data scientist, Software developer

Russia - Tests: 4

I'm a Data scientist/Software developer skilled in integration tasks, such as data exchanges, data loading (from Pdf to Excel, from Excel to different databases, from databases to Excel etc), data processing;I also have many years experience in code perfomance improvement in different areas from Sql queries in high-loaded enterprise application and data caching to logical improvements in algorithms. My main job now includes 1C framework. This is a most popular framework for enterprise applications in Russia. Also I have 3 Acm Icpc (International collegiate programming contest) sertificates from half-final сompetitions and a lot of diplomas from different mathematical сompetitions. My English level is between Basic and Conversational (I understand a most part of easy dialog but I can't understand fast or accent voice, complex phrases or some words).

$30.00 /hr
29 hours

Zlatomir Zlatev

Zlatomir Zlatev

Desktop Apps,Databases,Bioinformatics,Statistics,R-project,web Scrap

Bulgaria - Tests: 3 - Portfolio: 2

I have 14+ years of programming experience and a Master's degree in Bio- and Medical Informatics. I'm good at User Friendly GUIs, Data Reorganization, File Format Conversions (including text and binary data formats), Web Scrapping, Desktop Applications (Visual FoxPro, C# recently), Databases (a lot of experience), Bioinformatics, Statistical Analysis, R-project for statistical computing (including C code compiled for R to speed up some time consuming computations), SQL, Microsoft Office Excel Automation (VBA code sent from a desktop application to Excel to make it do things), Programs to Automatically fill Acrobat PDF Forms, Text Parsing, Mapple, C, C++, C#, Audio/Video formats conversion, Molecular Biology, Genetics and more. Keywords: Bioinformatics, Desktop Applications, Molecular Biology, Genetics, C, C++, C#, Mapple, PDF Forms, edgelist, edge list, Databases, database, Statistical Analysis, R-project, VBA, Automation, Medical Informatics, Algorithms, algorithm, File Convert, files conversion, Text Parsing, parse, user friendly graphical interface, GUI, Audio, Video, website scrap, scrapping, wordcloud, wordclouds, word cloud, word clouds, C#.

100% Job Success
$25.00 /hr
199 hours

Kapil Juneja

Kapil Juneja

Excel Expert, Access Expert, VBA, 6 Sigma-Lean Green Belt

India - Tests: 8 - Portfolio: 2

I do have 7+ years of experience of working on Excel/Access based projects and have good command over VBA, functions and applications.. I created many dynamic dashboards and structured databases with User Interface including Web Scrapping projects. I can portray many examples also. My firm belief is to provide excellent developing services to ease my customer requirements and provide an user friendly, professional application. Because of extensive experience in Six Sigma and Data Modeling, I am good in suggesting and implementing the best solutions for my clients to improve their projects Looking forward to hear from you Have a great year ahead. :-)

88% Job Success
$15.00 /hr
1,956 hours