Top Upwork Freelancers

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  1. Liam Zdenek

    Liam Zdenek

    Consultant - Optimization - Security - PHP - MySQL - Linux

    United States - Last active: 22 days ago - Tests: 9 - Portfolio: 8

    I have notable experience and expertise optimizing web applications, and was instrumental in designing and optimizing a website that was in the top 50 websites with millions of hits every hour. I have worked on the entire stack: everything from front-end javascript, to backend applications written in PHP, Node.js, or Golang. See my oDesk Tests section. I have achieved, among others: * PHP: First Place * Javascript: Top 20% * Unix: Top 10% * Perl: Top 30% I specifically have experience with: * PHP (including Yii, Slim, Silex, and Symfony) * Golang * MySQL/PostgreSQL, including optimization * Redis, MongoDB, and other NoSQL databases * Linux (as both a desktop and a server) * Advertising * Video Streaming * Imagemagick (image compositing and effects) * eCommerce * Paypal, FedEx, Authorize.net, and other third party APIs * Biological data (Fasta, Uniprot, PDB, etc.)

    $120.00 /hr
    829 hours
    5.00
  2. Michelle Powell-Smith

    Michelle Powell-Smith

    United States - Last active: 5 days ago

    With more than seven years of online content writing experience, I can offer well-written, accurate and timely content that will keep your readers, customers and clients interested in what you have to offer. I've written on topics ranging from cooking and crafts to personal finance and health. Your site content and written materials form a key part of any marketing campaign, whether you need a girl-next-door voice or to add polish and professionalism to your public face.

    $40.00 /hr
    54 hours
    4.99
  3. Rachidi M.

    Rachidi M.

    Full-Stack Developer

    United States - Last active: 9 days ago - Tests: 1 - Portfolio: 1

    Over the last 6 years, I have developed wide range of websites using Ruby on Rails and Node.js/Express and Scala/play framework. I also built one page fronted application using marionette and lately react. I also worked on computer vision challenges face recognition, product recognition. On the ML part I've been using neural networks/ deep belief network for image classification, I also built a variety of predictive models using svm and random forest... I am also a technology enthusiast and thus I'm always glad to deliver projects using cutting edge tools. I particularly interested in react and react-native. I am moving towards functional programming, love Frp and flux architecture philosophy. I am what you'd call a full stack developer and I can single-handedly deliver whole projects start to finish. My experience: * Back-end:(memcache,redis,postgres) ** Ruby On Rails ** Scala (play framework) ** Node.js (Express.js) ** AngularJS ** Mobile (React native, titanium , Objective C) ** Front-end (Marionette,backbone,ReactJS) ** Data crawling (Selenium/RegExp) - over 7 years ** Machine learning (Neural Networks, computer vision)

    $60.00 /hr
    226 hours
    5.00
  4. Floris Franssen

    Floris Franssen

    Translator (Dutch, English, French) and Proofreader

    Netherlands - Last active: 13 days ago - Tests: 12

    Wotcher, my friends. Floris Franssen at your service. I'm a professional translator. I am a native speaker of Dutch, and a citizen of the Netherlands. I have a BA and MA degree in formal linguistics, and ample experience with the practice of translation. I am quite committed to delivering a good product, sometimes even perfectionistically so. I hold myself to high standards for professional integrity and translation quality. I'm the kind of translator you need if you want to make sure things get done right. I work with SDL Trados. Also, I have a website. www.sentaris.net

    $33.33 /hr
    142 hours
    5.00
  5. Wendy G

    Wendy G

    International Brand Management, Marketing and Commercial Strategy

    United Kingdom - Last active: 6 days ago - Tests: 9

    I have 15 years management experience in large MNCs and conglomerates (LVMH, Dell, Oracle) as a senior executive leading sales and marketing functions across Europe and Asia Pacific. I have particular interest and experience in international business development and strategy in both Technology and Luxury Consumer Goods. As a Strategy Consultant, my priority is to help you grow your business further than where you are today. I work by first understanding your products/ services and business model, current market(s), pricing and marketing strategy. I do not merely create fancy powerpoint presentations and run complex financial simulations; I work with you collaboratively and am involved with your strategy development every step of the way. I run my own consulting practice in London, UK. My clients include both startups and SMEs as well as large multinationals such as the Estee Lauder Companies.

    $111.11 /hr
    153 hours
    5.00
  6. Ivana Nykina

    Ivana Nykina

    Market analysis, qualitative research, marketing plan.

    Russia - Last active: 3 days ago - Tests: 2

    Marketing professional with extensive experience in market research both online and offline. Consumer insights expert specializing in qualitative research and product development research, market analysis, marketing strategy. Deep expertise in understanding of Russian consumer market and how businesses can tap directly into their habits, aspirations and attitudes. Have a strong experience in managing cross-cultural research projects within customer and product development services. Passionate about providing high quality, cutting edge qualitative research in a tight deadline.

    $35.00 /hr
    83 hours
    5.00
  7. Thomas Weidman

    Thomas Weidman

    Developer (PHP, ColdFusion, C#, .NET, MVC3, HTML5, jQuery, Sitefinity)

    United States - Last active: 2 days ago - Tests: 3

    Since 1998, I have done a wide range of web development and have used many technologies (C++, Perl, VB, VB.NET, C#, ASP, ASP.NET, ASP.NET MVC2, ASP.NET MVC3, SQL, PL SQL, T-SQL, ColdFusion [CFML], PHP, ActionScript). I have also used many tools from Flash, Fireworks, Photoshop, Dreamweaver, Eclipse, and Visual Studio. My core skill set lies in problem solving and creating solutions to solve problems in the most efficient (time, budget, and quality) way. I enjoy development and do so in my free time. I use that time to explore new topics that look interesting and to expand my knowledge on existing topics. I have a unique work experience and understand not only coding but also network and server implementations (being a system administrator). I have experience integrating technologies to fulfill requirements or solve limitations of technologies. An example of this I can provide is a solution I did for a client. The solution involved ColdFusion, SQL Server 2005, and ASP.NET Web Services. Due to specific security requirements and limitations of interoperability of ColdFusion 7 and ASP.NET I developed SQL Server CLR Functions and Procedures that invoke web services and return structured data to ColdFusion. From a CF developer perspective all you do is call a stored procedure or execute a cfquery call. The DBMS server does the rest and because it has the ability to use the .NET language I was able to invoke custom services that had very specific security requirements. This solution has been in place for three years now and has not had any issues with this method. I have also used different technologies to handle things like encryption for PCI compliance. I worked with a client to build a custom transactional processing system that utilized C++, Java, SQL Server, PHP, and ColdFusion. The end result is a distributed secure system that handles all payment processing for this client (Web and Internal). This solution also required an understanding of Firewalls, IDS, and how to combine technologies so they would work together seamlessly. If you're looking for a developer who can research options, architect solutions, develop and document, I am an excellent choice and look forward to working with you.

    $66.67 /hr
    254 hours
    5.00
  8. Marin Katic

    Marin Katic

    SMB IT and Microsoft Office 365 Specialist

    Croatia - Last active: 2 days ago - Tests: 6

    Microsoft Certified Specialist. Microsoft Server, Office 365, Windows Azure, Microsoft Desktop. 18 years of experience in planning and administering Microsoft platforms in Insurance companies and IT companies. Leading teams of IT specialists. Experience with dedicated security solutions (logging, identity management, database access monitoring). Social skills experience: Help Desk and Desktop and App administration for over 500 users.

    $30.00 /hr
    57 hours
    5.00
  9. Jon Rowe

    Jon Rowe

    Actionscript/Flex Expert with comprehensive design and artwork skills

    United Kingdom - Last active: 2 days ago - Tests: 3 - Portfolio: 6

    Self-motivated, innovative developer with a track record of delivering stunningly visual and enjoyably social games and apps for both web and mobile. Plans, tests and delivers quickly and efficiently using a wide range of industry standard tools and frameworks. Employs sound Object-Oriented techniques to create well-documented, organised, bug-free code that is built to last. Areas of expertise include: • Flex/Actionscript 3 • TDD/BDD • Starling/Feathers • Away3D • Robotlegs 1 & 2 • PureMVC • Box2D, Nape Physics • AS3Signals • Facebook Graph API, Twitter API, Instagram API • iTunes Connect/Google Play Store integration • Angular.js/Express.js/Node.js full-stack test-driven development • Git/SVN

    $31.11 /hr
    86 hours
    5.00
  10. Lei L.

    Lei L.

    Experienced J2EE/.Net, Delphi Developer,Oracle Fusion Middleware

    China - Last active: 1 month ago - Tests: 8 - Portfolio: 7

    Over the last 10 years, I have developed many enterprise level business applications using Html, Flex, J2EE, Resin/Tomcat, IBM WebSphere/Bea Weblogic, Oracle/MySQL for medium/large companies and medium businesses in Oil & Gas industry.My main customers are PetroChina,Sinopec,Haier. (NOTE:These experiences are not included in my "Portfolio" section, Because they are deployed in enterprise's internal environment and invisible to public) My personal interests are making desktop application using C#,Delphi,VB.I have developed many productions, Some of them can be found in my "Portfolio" section. I also provide English to Chinese translation services and Software/Website localization services. As a professional person, Supply best services to employer is my duty, And customer satisfaction is my eternal pursue.And i also believe "Cooperative Relationship" will better than "Employment Relation". "Good communication is the foundation of a successful project".

    $35.00 /hr
    246 hours
    5.00