Top Upwork Freelancers

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  1. Enrique Matos Alfonso

    Enrique Matos Alfonso

    Professional of Computer Science

    Germany - Last active: 29 days ago - Tests: 2

    I graduated from the University of Havana and worked in several fields of the Computer Science, mainly related to Artificial Intelligence. Then I came to Germany and completed a master degree on Computational Logic in 2014. I have published articles about Genetic Algorithms and Classification Techniques in machine learning applied to other fields like Electrical Engineering and Propositional Logic. I look forward to applying more Artificial Intelligence techniques to to solve interesting problems in other fields.

    $33.33 /hr
    163 hours
    5.00
  2. Muhammad Yousuf Saif

    Muhammad Yousuf Saif

    Android/iPhone Developer

    Pakistan - Last active: 14 days ago - Tests: 6 - Portfolio: 8

    I am Android and iOS apps developer having 5 years of experience. I have developed apps using Java, Objective-C, Swift, web-services, JOSN, XML, and sqlite. I also have experience in OOP and SQL. I have key strengths in technology design, development and implementation and have the ability to meet demanding time goals. I am focused, self-motivated team member that takes pride in solving complex technology problems and delivering user-friendly solutions.

    $27.78 /hr
    542 hours
    4.72
  3. Ahmed N.

    Ahmed N.

    Senior Linux Admin, Cpanel, RedHat, Ubuntu, Perl, BASH, Virtuozzo

    United Arab Emirates - Last active: 1 month ago - Tests: 10 - Portfolio: 2

    Over the last 12 years I have developed a wide range of skills and my objective is to leverage my significant technical skills in a position as Unix/Linux Administrator I have extensive experience in installing/configuring different software including but not limited to Apache, PHP, MySQL, PostgreSQL, exim, postfix, dovecot, BIND, POP/IMAP, SMTP, SSL, SSH, proFTPd, pureFTPd, iptables (APF/CSF), Kayako, WHMCS, ClientEXEC,OpenVZ,Virtuzzo,Nagios.

    $18.89 /hr
    338 hours
    5.00
  4. Yuriy A.

    Yuriy A.

    Expert Java Developer (Server Side)

    Russia - Last active: 1 month ago - Tests: 3

    Over the last 8 years, I have developed a wide range of software solutions using JavaSE/JavaEE. Last three years I have been working as Java Expert who helped java-team and QA-team to solve complex problems. Special Skills: 1) Multithreading 2) Integration 3) Improvment/Optimization 4) Jetty/Servlets/HTTP/JAX-RS/JAX-WS 5) JMS (ActiveMQ/Fuse) 6) Hibernate/SQL (MySQL, Oracle, MSSQL) 7) Morphia/NoSQL (MongoDB) 8) SMPP 9) XML/XSLT/JSON 10) HTML Parsers/Spiders/Bots 11) Security 12) JUnit/Mockito/DBUnit/Cobertura 13) Maven/GIT

    $30.00 /hr
    20 hours
    5.00
  5. Michael Ravits

    Michael Ravits

    Full-Stack Software Engineer

    Israel - Last active: 12 days ago - Tests: 2 - Portfolio: 1

    I am a Full Stack Developer with over 9 years of experience in the industry, working both on Web as well as native applications. While I excel at working with a team, having experienced managing a remote group of developers, I am also capable of single-handedly delivering projects from start to finish. With my skills and experience, I always strive to produce clean, robust and highly tested code for every project. Having a very broad experience with numerous tools/languages and technologies, I specialize in building modern web applications and high-scale data processing pipelines. My language of choice is Clojure. Some of the technologies I've worked with in recent projects: - Server side development on the JVM * Clojure * Cassandra * ElasticSearch * Java * Kafka * Redis * Samza * Spark * Storm - Large and small client side applications in ClojureScript * Om * Reagent * ReactJS As a technology enthusiast I enjoy utilizing these cutting-edge tools to deliver projects quickly and efficiently.

    $79.77 /hr
    843 hours
    5.00
  6. Ivan R.

    Ivan R.

    Front-end engineer

    United States - Last active: 5 days ago - Tests: 2

    Some of the technologies I enjoy using are Node.js, MySQL, MongoDB, Angular, Backbone, D3.js, Canvas, CSS3, Jenkins and Git. Always open to try new languages, frameworks and methodologies. I've developed several web apps and admin systems for restaurants, medical systems, construction companies and Sales companies. In the past I've also worked as an Automation Engineer for more than 2 years, developing testing frameworks and distributed testing engines, all in Java, for a Geo-Stationary Satellite controlling software.

    $36.67 /hr
    58 hours
    4.98
  7. Olha L.

    Olha L.

    SW Test Engineer

    Ukraine - Last active: 7 days ago

    Over 8 years (25 projects) of experience in full life-cycle of development business applications. quality assurance, quality control and business analysis. Projects in the business areas such as Finance, Healthcare, Real-estate, E-commerce, ERP, CRM etc. Projects Web, desktop, embedded, including complex system. My responsibilities in this respect include: • establishing and support the QA process • requirements analysis, business analysis, risks analysis and measurements • initiate and maintain documentations like Vision, SRS, User story, acceptance criteria, test strategy/plan/design/cases/scenario/checklists, tractability matrix, metrics, risk analyze, • tests execution (any type of manual testing) • leading QA team and controlling QA process throughout the project life cycle • evaluate the results , document the deviations from expected results I have taken the following positions: • Test and QA Engineer • QA Team Lead (up to 10 team members) • Business Analysts • Consultant • Mentor • Lecturer • SCRUM experience • BA experience Result-oriented, high personal standards, attention to details. Responsible and proactive.

    $10.00 /hr
    18 hours
    5.00
  8. Eduardo Garcia

    Eduardo Garcia

    Full stack Developer / Project Manager / Laravel Expert

    United States - Last active: 11 days ago - Tests: 7 - Portfolio: 2

    IT professional passionate to create innovative, efficient and high impact solutions while delivering the best customer service and support. Highly committed to achieve top customer satisfaction and to create high quality products. More than 15 years of experience delivering IT solutions for TOP companies with thousands of employees. I have great experience working with teams in different countries (USA, Mexico, New Zealand, China, Sweden, Philippines, Peru, Chile and Argentina). Very successful experience in every area of SDLC. Experience with high concurrency transactions (banks) online transactions, e-commerce, shopping carts, mobile applications, workflow, content management, ERP, HRMS, web design, architecture, database modeling, testing and consulting. Created one of the TOP 5 solutions in my country for Human Resource Management Systems, called FRACTAL. Our software is currently processing payroll for more than 50,000 employees. It is been used by Adecco, Komatsu-Mitsui among others. Last project: CRM with customized workflow and google maps/places integration using PHP, MySQL & Laravel. Technical experience: MySQL, PHP, Laravel, AWS, DynamoDB, Elasticsearch, APIs, GIT Ecommerce, SQL Server, ASP, Java, CSS, HTML5, JQuery, AJAX, Codeception

    $39.00 /hr
    351 hours
    5.00
  9. Pavel S.

    Pavel S.

    Java Developer

    Russia - Last active: 1 month ago - Tests: 5

    In programming since 2004 (Oracle pl/sql in Banks). Now I am Java Developer (3 year of J2EE web development). I have involved in website development using JSF 2, JSP 1.2, JSTL 1.2, Servlet 3.0, Spring, JDBC 4.0, Tomcat 7, MySql. Experience in Maven, JUnit, Mockito, Git, Jirra. Understand HTML, CSS, Sql, Java Script. I want to strengthen my knowledge in J2EE with your greate Team. Also I want to become Java Enterprise Architect and work hard for this! Looking for any part time job upto 10 hours per week.

    $16.67 /hr
    36 hours
    5.00
  10. Toni Petrina

    Toni Petrina

    Senior Mobile developer/Microsoft MVP for .NET

    Croatia - Last active: 5 days ago - Tests: 6 - Portfolio: 2

    Math graduate with major in Computer Science. Software developer for more than 12 years. Works primarily on Microsoft stack (.NET, MFC, WPF/Silverlight/WinRT), but also skilled in other technologies like PHP. Likes to work on web/mobile projects and is passionate about game development and graphics oriented development. Speaker at a local and regional conferences and events, passionate blogger and community contributor.

    $44.44 /hr
    29 hours
    4.37