Top Upwork Freelancers

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  1. Guangming L.

    Guangming L.

    Data Scientist and R Expert

    United States - Last active: 1 day ago - Tests: 7

    I have 7 years of experience in data analysis. I'm the Chief Data Scientist and founder of Cabaceo.com, a data science consulting company in Ann Arbor, Michigan, US. I also teach people how to do data science using the R programming language at www.MasterR.org, where you can receive high quality training materials for free. I used to work as an analytic consultant for FICO, where I built scorecard for Picture People to predict customer response rate to their marketing campaigns, which doubled their ROI. I also built customer segmentations for Canadian Tire Bank, which gave the executive team a holistic understanding of their customers for the first time and resulted in a chapter of a book. More recently, I have built a linear regression model to explain the relationship between interest rate of peer-to-peer loans and borrowers' characteristics using data from LendingClub, a two-level clustering-and-randomForest model to predict human physical activities using smartphone data, a logistic regression optimization based on precision and recall, a R-implementation of the cross-sectional regression and quintile-portfolio construction methods published in the Journal of Economic Literature. I have a masters degree in Biostatistics from the University of Michigan and a bachelor's degree in mathematics from New College of Florida. I'm an avid MOOC taker, constantly learning new techniques and tools in data science and machine learning. I took all the courses in data science, statistics and machine learning from Coursera, Udacity and Edx. I respond all my messages in less than 24 hours.

    $100.00 /hr
    585 hours
    4.97
  2. Taras D.

    Taras D.

    Magento Developer

    Ukraine - Last active: 4 days ago - Tests: 4

    I have good knowledge in areas of PHP development and creation of HTML layouts with complex JS interactions. Have strong understanding of OOP concepts and JS prototyping. Also have skills in system administration. Relevant experience: Magento-related (both EE and CE): Themes creation/modification; Various integrations (WordPress etc.); Multi-store setups handling; Front-end optimization (CSS sprites, JS/CSS minification, etc); Modules development; Magento upgrades; General: Git (preferable) or SVN; Issue tracking systems usage (mostly Jira, Redmine); Advanced *nix (Debian/CentoOS/RHEL/FreeBSD) administration and shell scripting; cPanel/WHM/Plesk knowledge.

    $33.50 /hr
    458 hours
    4.99
  3. Evan Jensen

    Evan Jensen

    US-based Health, Fitness, and Marketing Article Writer

    United States - Last active: 14 days ago - Tests: 5 - Portfolio: 1

    Website: www.thehealthycopywriter.com The Truth About Diet, Exercise, and Weight Loss An estimated 70 percent of all adults in the United States are overweight or obese, according to the Centers for Disease Control and Prevention. That means that in the U.S. alone, 154.7 million adults have a weight problem. Many attempt to follow fad diets, take dietary supplements, or even resort to weight reduction surgeries to lose body fat and change the way they look. But most fail. 2 Things Health and Fitness Content Must Provide These approaches to weight loss can serve as a starting point for people who want to lose weight, boost their metabolism, get in shape, and build muscle. But in order to be successful at weight loss, body transformation, or any muscle-building plan, there are two critical components that need to be part of the content you provide your readers: Education and motivation. Most people who want to lose weight, decrease body fat or build muscle, don’t quite know where to start or what to do. The result is a pattern of yo-yo dieting, weight loss and weight gain, or half-hearted attempts at progressive muscle building and weight-loss workouts. But it doesn’t have to be that way. Evidence-Based Content for Everyday Readers From a content perspective, if you want to tip the scale in the right direction and really help people achieve their health and fitness goals, you need high-quality, educational, engaging, and content-rich information blended with a little motivation to help them stay in the fight, keep trying, and put in the effort to make lasting lifestyle changes. Season that with evidenced-based research on diet and exercise, and your followers will keep coming back for more. Hire Me My name is Evan Jensen. I have a master’s degree in journalism and more than a decade of experience as a reporter, editor, and freelance writer for newspapers, magazines and corporate clients. As a kid, I watched my obese parents try every diet in the book without success, and resolved not to take the same path. I’ve finished 30 plus marathons and ultra-marathons, including a 100-mile mountain endurance run. And I’ve written thousands of articles in my writing career, including many about diet, exercise, fitness, nutrition, chronic disease, and preventive care. If you have writing or editing needs for articles, e-books, blogs, newsletters, press releases, feature stories, Q&As, case studies, marketing campaigns, or anything else, give me a shot at delivering high-quality content and making a good first impression. - Evan

    $50.00 /hr
    959 hours
    4.96
  4. Alper OKUTGAN

    Alper OKUTGAN

    Professional PHP Developer and Web Scraper

    Turkey - Last active: 15 days ago - Tests: 8 - Portfolio: 33

    Top-notch web scraping expert using PHP/cURL, having scraped hundreds of sites with millions records. Always deliver perfect quality with quick turnaround. Crunchbase, Twitter, oGame, Washington EDU, Craigslist and Yipit are just a few examples. My major expertise is Web crawling, data minning, Wordpress plugin and theme development with PHP/MySQL. I have a degree in Computer System & Engineering and have 14 years experience coding. I am interested in solving complex challenges, difficult problem solving, and learning to enhance my programming skills. I have been working in the hosting industry (Hostgator, GoDaddy, Bluehost) for more than 8 years and highly experienced using hosting software such as WHM/CPanel/Plesk/Virtuozzo/Webmin/Virtualmin. Technical background; I began programming on C64s with QBasic language in the 1990s. Following graduation, I developed various programs with Borland Delphi for computing hardware faculty from 2000s, and I am still programming for RS232 / OBDII. I professionally created various web development projects with PHP and Perl languages since 2002. I began working with Linux and FreeBSD in 2003 and I have been working as an admin for various servers like Debian and Ubuntu operating systems since 2005. I have founded to BACOMputer, which my first company on 2005, and I am still working as a software developer for my own company. I have created almost 250 web sites which are hosted in my re-seller account, and I can provide web hosting services also. You may easily reach some of website samples in my portfolio. I began working with clients through oDesk since 2009, and I have successfully completed many contracts between 2010 - 2014. The subjects of my recently works; ° Web scrapping / mail scrapping with PHP/cURL. My PHP codes also can be run as standalone programs on the linux shell and/or with crontab. ° OpenVPN authentication systems ° Creating Wordpress plugins and themes. HTML to Wordpress. ° PHP-MySQL works / Admin Panels. ° Delphi or PHP based text file conversion programs. * OPEN-WRT Linux distributions. ° Hosting services and transfers. ° Malware code cleaning on the sites and servers. (I have developed my own tools for finding malicious codes and infected files as quickly and efficiently) ° Decompiling/Tracing Flash applications/games. ° Radio, Audio stream program installations and configurations. Shoutcast, Icecast and Flashcast solutions. ° Software installation on Linux. Ftp servers, Apache, Nginx, PHP and MySQL installations/configurations. ° jQuery and resolving jQuery issues and conflicts. ° JWplayer, Flowplayer video player installations and delayed messages/auto redirecting projects ° Lightbox, Greybox, Laytbox and other jQuery (auto) popup solutions. ° .htaccess works (Mass redirections, SEO based links, permalinks)

    Groups: Bluehost Developers and Designers

    $45.00 /hr
    1,470 hours
    4.99
  5. Michael Gietz

    Michael Gietz

    Creative Writer/Web Content

    United States - Last active: 1 month ago - Tests: 12 - Portfolio: 6

    I have 26 years of creative writing experience, including a published novel. I specialize in ghost writing, article writing and website content, but I can accommodate a wide variety of writing requirements. I have studied under Michael Chabon, a Pulitzer Prize winning author, and I have worked on academic research projects, dissertations and position papers. I have written and edited screen plays and maintain an active connection with Hollywood and academic circles within U.S.C. I take my work very seriously, but I think it's important to not take myself too seriously. I take great pride in ensuring that you are completely happy with my work, otherwise the project is not finished.

    $56.00 /hr
    1,225 hours
    5.00
  6. Mariano Libonatti

    Mariano Libonatti

    Web UI/UX Designer

    Argentina - Last active: 7 days ago - Tests: 5 - Portfolio: 23

    Professional and Creative freelancer with 10 years of Visual design experience in agencies for brands such as Kraft, Danica and Telefonica. 3 years as a TOP RATED freelancer in Elance and Odesk. Expert in Branding, Packaging, Magazines, Marketing Material, Web design focused on stylish, adaptive and intuitive User Interface & User Experience designs.

    $55.56 /hr
    665 hours
    4.93
  7. Chris Dabbs

    Chris Dabbs

    Voiceover Artist - Male British, UK English

    United Kingdom - Last active: 6 days ago - Tests: 4 - Portfolio: 5

    Hi there I'd love to help you with this project! Here's a little detail about me... I have many happy clients from over 22 countries around the world. My clients include FedEx, Accenture, AstraZenica, GE, Google, Organix, Microsoft, Adobe, Mattel, Kimberly Clark, Pfizer, Onyx Pharma, Siemens, CA, Towers Watson, FujiFilm, JVC, BBC, NBC Universal, Rio Tinto, Jack & Jones, New Era, PUB Singapore and many other small and corporate sized companies. I am a full time Voiceover Artist and I have a neutral English British Accent RP (Modern BBC) and Web Explainer videos are my speciality! I record in my own Professional Studio so my recordings are crystal clear and free of hiss, clicks, bangs, traffic rumbles and aircraft noise! Please get in touch if you have any questions - I'm happy to help! Chris Dabbs

    $83.33 /hr
    80 hours
    5.00
  8. Andrey E.

    Andrey E.

    Web Scraping Expert and PHP Web Developer

    Russia - Last active: 1 day ago - Tests: 7 - Portfolio: 12

    I'm web scraping expert/full stack developer with 7+ years of commercial experience. I'm good problem solver holding M.S. in maths and computer science. Today I'm offering webscraping/php/javascript services as a freelancer. My main skills: • Web scraping, parsing, automation, data processing • Simplehtmldom, Goutte, Symfony Browser Kit, Cheerio, CasperJS, Regular Expressions, Xpath • PHP, JavaScript, Java, NodeJS, PhantomJS, LUA • HTML5, CSS3, LESS, Bootstrap Framework • MySQL, MongoDB, Redis • Memcached, ZeroMQ, ReactPHP • SocketIO, Websockets • REST, SOAP, XML, JSON • Matlab, Wolfram Mathematica • Jquery, KnockoutJS, BackboneJS, RequireJS • Prestashop, OpenCart • Experience working with APIs: Ebay, Spotify, Amazon AWS, Amazon MWS, Flickr, Facebook Graph, Vk.com, GitHub, Instagram and several others • Git, SVN • Apache, Nginx, Curl • Amazon AWS • Linux, Vagrant • Understanding of OOP principles and software design patterns • Teamwork experience My github account is https://github.com/256cats My blog: http://256cats.com/ Over the years I’ve developed a lot of web scrapers of different complexity mostly using PHP (simplehtmldom, browserkit) and NodeJS/PhantomJS (casperjs). Some were simple regex-based and others were complex distributed systems with multiple proxies and Amazon AWS support. Also I developed a wide range of websites using PHP, HTML, JavaScript, CSS and MySQL including several e-commerce websites (+ Prestashop, Opencart). I built sites both from scratch and using frameworks, developed custom modules and extended existing ones for my clients. I have experience in PHP/MySQL performance tuning. Last two years I was working as MMO game (Clash of Clans/Heroes of Might and Magic-like mechanics) logic/backend developer. I’ve implemented distributed message queues, realtime leaderboards with Redis, Mysql, PHP. Developed battle-related algorithms (game unit classes, attack/defend, shortest path, quadtree). Then I’ve done some frontend development, e.g. – developed embeddable javascript classifieds widget and fitness/health single page web application with realtime updates/notifications (HTML, CSS, JavaScript, Jquery, Knockout.js, MomentJS, REST, AJAX, Socket.io).

    Groups: Coding Champs

    $39.90 /hr
    150 hours
    4.98
  9. Bryan Kelly

    Bryan Kelly

    Chartered Professional Accountant (CPA, CMA)

    Canada - Last active: 2 days ago - Tests: 2

    To view my complete CV and freelance work history, please feel free to visit my website at www.bryankellycpa.ca I'm a certified accountant (CPA, CMA) with over 12 years of experience as both a freelance and corporate accountant. I currently work with a wide variety of small business owners (both in Canada an internationally) providing services including financial planning, accounting, payroll and tax. My freelance experience is backed by nearly 10 years spent working in the energy and manufacturing sectors holding a wide variety of roles as a front-line accountant, internal auditor, and manager with oversight for Sarbanes-Oxley (SOX) compliance and an IFRS conversion.

    $44.44 /hr
    667 hours
    5.00
  10. Filip P.

    Filip P.

    Prolific graphic designer. Excellent at Motion Graphic & Videos

    Macedonia - Last active: 1 day ago - Tests: 6 - Portfolio: 4

    Over the last 7 years of learning among people that are experts in particular area such as audio-video production, i have reached my goal of becoming one of the focal points in the leading audio-video production company. My hard work and devotion lead me to many serious projects in which i upgrade my skills and techniques , tending to perfect my self in every aspect of this area each and every day.

    $30.00 /hr
    58 hours
    4.97