Top Upwork Freelancers

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  1. Khoa Nguyen

    Khoa Nguyen

    DevOps

    Vietnam - Tests: 3

    - Have experience about managing big system about 300 server . - Infrastructure as code with Ansible, Chef. - Use Docker to Continues Deployment - Build Continuous Integration and Continuous Delivery System by Jenkins, Ansible , Docker - Programming languages: bash shell, Python, PHP, Ruby - Config, manage open source such as mysql, apache, nginx, memcached, redis , vagrant , docker ... - High available with fail over and load balance. - Monitor system with New Relic or Zabbix tool - Have experience with Amazon web service : EC2, S3, Route 53, Elastic Cache, Auto Scalling , ELB and Digital Ocean

    $21.99 /hr
    70 hours
    5.00
  2. Dmitry O.

    Dmitry O.

    Java/Scala/C++ Senior Developer

    Uruguay - Tests: 6 - Portfolio: 3

    10+ years experience in Java EE & Core Java. 4 years experience in C++. Practical experience in: - architecture, design, development, testing and deployment of server-side and desktop applications, databases. - transaction processing, distributed SOA systems integration. - work experience in small to large teams, for government, commercial and financial clients. Java technologies: Core Java, Java EE, EJB/JPA/Hibernate, WebServices integration. WildFly(JBoss)/GlassFish/Tomcat servers, Spring and Struts MVC frameworks. Scala stack: Akka, Spark SQL (with DataStax). Java UI: JSF, JSP, Swing, SWT. C++: Qt, STL & boost. Databases: Cassandra(DataStax), ElasticSearch, MySQL, PostgreSQL, MS SQL Server. Development tools: Maven, SBT, JUnit, Git/Mercurial. OS: Linux server administration & Bash scripts. DataCenters: Google Storage.

    $30.00 /hr
    566 hours
    5.00
  3. Eugene S.

    Eugene S.

    Professional Developer

    Russia - Tests: 3 - Portfolio: 4

    I have years of experience with C/C++/C#, .NET, ASP.NET MVC, JQuery, SQL, LINQ, Entity Framework, TSQL, etc.I managed to work on various projects, have developed a number of websites and services for international companies as well as desktop applications for the small business. I have skills with wide set of Microsoft technologies. Also I have skills with Delphi, VB, have graduated Math dept and am seeking interesting projects with great wish to collaborate.

    $16.67 /hr
    63 hours
    4.98
  4. Saul H.

    Saul H.

    Java/C++/.Net Software Engineer/developer/integrator/consultant

    Venezuela - Tests: 3

    Knowledge Areas and skills Custom Software Development, POS, intranet system, administrative systems and integration with intelligent software solutions consolidate, organize and centralize amount of information located in different divisions and departments, so that executives make decisions about payments, suppliers , prices, materials management, promotions, etc. Algorithms and programming skills, strong knowledge of C/C++ and Java. Strong knowledge of data structures, strings, sorting, arithmetic and algebra, combinatorics, number theory, backtracking, graph traversal, Algorithms for graphs, dynamic programming and computational geometry. Accounting area, experience in handling all movement of materials between stores and shops, all the accounting related to its retail. Point of sale Area, experience with integration between POS software and label printers, fiscal printers, barcode readers, fingerprinter and keyboards for point of sale. Oriented Object Programming and Low-level: exprienced in Java and C/C++/C#. QT libraries and Visual Basic. Scientific Programming: Matlab. IDES: Intellij Idea, Eclipse, Netbeans, Kile, Quanta. Servers: Apache-Tomcat. Functional Programming and AI: Haskell and Prolog. Database: MySql Oracle, Postgres, SQL Server and FoxPro. Web Development/Frameworks: Php, Struts, Vaadin, ZK, html and css.

    $30.00 /hr
    1,808 hours
    5.00
  5. Manimaran M

    Manimaran M

    Ruby on Rails Expert

    India - Tests: 1 - Portfolio: 7

    Over 9+ years of technical design, architecture and hands on experience in web application development. For the past 5 years, I’ve designed mid-size web & SaaS applications using a variety of languages, platforms and technologies. I have full command in Ruby on Rails, Rspec, Cucumber, Twitter bootstrap framework, Sass, Haml, Javascript, Coffeescript, jQuery, Stripe, Devise, MySQL, PostgreSQL etc. Earlier I also worked with mid to enterprise Java/J2EE framework. In the last 5 years I have been leading startup teams from end to end management of clients, projects, team management and hands on architecture using agile development approach. I’m very well versed with lean startup approach from proof of concept phase to launch phase. I value my time and my clients time and always delivery on time. I believe in open communication and can help entrepreneurs/startups to polish/refine, brain storm ideas. I am seeking opportunities to create applications for you/your company or help in enhacing/optimizing your existing application(s). I guarantee high quality work and on-time delivery.

    $27.78 /hr
    14 hours
    4.49
  6. Ofir Vaknin

    Ofir Vaknin

    Business & Data Analyst (Data Storyteller)

    Israel - Tests: 2

    Areas of Expertise * Collecting, controlling and analyzing complex data sets, in support of senior management and internal customers. * Developing, maintaining databases and corresponding Dashboards. * KPI development, implementation and controlling. * Performing process analysis in liaison with end-users. * Design, develop and implement share point based systems Excellent proficiency in: data analysis, data visualization, data mining, systems analysis, process design, database design and implantation, data warehousing systems, training development. BA Management & Logistics - Bar Ilan University, Israel

    $40.00 /hr
    924 hours
    5.00
  7. GM Roland Agreda

    GM Roland Agreda

    Linux System Administrator

    Philippines - Tests: 2

    Hello, Equipped with years of experience, dedication, knowledge and expertise, i am confident i can be of great value to your company. I am very good at Wordpress and able to design/build and maintain a website, also do some SEO I have enough work experience with linux server, networking and system security, 8 years of experience with linux servers, i'm expert on push scripts, sandbox to production file push, and data retrieval, my previous job was senior system administrator to a bit-coin mining company. I have many experiences with web-hosting company and launching 3-5 sites daily, i am well experienced in WHM/Cpanel/WHCMS and DNS, i have knowledge with wordpress and drupal, and mail configuration MX settings. I love doing server maintenance, and i am available 24/7, i am used to using a staging system is to have a staging and production site, i am well experience on that method, last time i have program a cron job script to push the dev files to sandbox every 4hrs, the developer working on the dev site and no need to FTP to send to sandbox, i had it automatic push, then when the files is on Sandbox QA check the files before manually push to production server, also "manual push" but server side click only 1-2 sec done... Database and Files....

    $6.67 /hr
    179 hours
    4.98
  8. Khoa Nguyen

    Khoa Nguyen

    Senior Winform, WCF, ASP.NET, Extjs, SSRS / RDLC, Telerik, DevExpress

    Vietnam - Tests: 2 - Portfolio: 3

    Experienced with technologies and frameworks: - WinForm with C#, VB.NET, DevExpress, Telerik UI libraries - ASP.NET (MVC) with ExtJS, Ext.NET, jQuery, Kendo UI, and DevExpress - WCF, Web API, Entity Framework - SSRS / RDLC reporting - MS-SQL Server / T-SQL Typical past projects: 1. Online CRM system: A web-based application designed to function as an online CRM system for organizations operating funds in managing fund allotments, transfers, reinvestments, and distribution. Not only for fund management but the CRM also provides core functionality to allow plugin other modules such Contract management, Project management, etc. Technologies used: - ASP.NET 4.5 (C#) - Entity Framework 6.0 - WCF Service providing REST API - Extjs 4.0 - RDLC report technology - MS SQL Server 2012 2. Waterfall calculation web-based application: A web-based application designed to perform complex waterfall calculations for alternative investment funds. Specifically the application automates the Carried Interest Calculation (Calc) which is used to determine the fund manager’s compensation in regards to the profits of the fund. Technologies used: - ASP.NET 4.5 (C#) - jQuery, jgGrid - MS Reporting Service - Microsoft Enterprise Library - MS SQL Server 2012 3. Insurance claim handling: A desktop application to handle insurance claims. The system was developed using VB.NET, Entity Framework, and DevExpress with a lot of T-SQL coding via stored procedures. Technologies used: - VB.NET - Entity framework - DevExpress - MS SQL Server 2012

    $16.67 /hr
    1,384 hours
    4.89
  9. Zhuhriansyah R.

    Zhuhriansyah R.

    Web Technology Programmer

    Indonesia - Tests: 5 - Portfolio: 2

    I'm a professional programmer. Experienced as technical software development leader for +10 years. Excellent at web technology and mobile web platform. I'm a fast learner, hardworking, strong analytical, and good problem solving. I had good educational background and expertise to solve problem with non algorithmic approach, such as artificial intellegence methods, indexing, and others. Experience on Yii, Laravel, HTML5++, Cordova, AngularJS, Ionic, Delphi, Android, iPhone

    $15.00 /hr
    53 hours
    5.00
  10. David S.

    David S.

    Seasoned Enterprise Developer with Web Emphasis

    United States

    I'm here to write code and chew bubble gum, and I'm all out of gum. I'm a developer who has tackled pretty much everything in the realm of business needs. I can deliver on-time, unit-tested, future-proof, scalar code that won't have to be re-written. I've written code for some of the big boys, including Siemens and Volkswagen.

    $49.99 /hr
    789 hours
    5.00