Top Upwork Freelancers

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  1. Maciej Klepaczewski

    Maciej Klepaczewski

    Web Performance Optimization Engineer

    Poland - Tests: 2 - Portfolio: 2

    I specialize in Website Performance Optimization (WPO). In particular I do: * MySQL optimization, * PHP optimization, * HTML/JavaScript/CSS related optimizations. I can guarantee page loading times in range of 1-3 seconds or less. I also have experience in web scrapping and handling large amounts of data (where by big data I mean at least dozens of gigabytes). I have masters degree in Computer Science from Wroclaw Technical University. I'm experienced programmer with 15 years of experience (I coded my first software in high school).

    $80.00 /hr
    945 hours
    5.00
  2. Stanislav K.

    Stanislav K.

    Android Developer

    Belarus - Tests: 1 - Portfolio: 2

    Hi, my name is Stas. I'm responsible Android developer with strong knowledge in application development, testing, performance improving and publishing. I work with Android more than 2 years. I can: - develop application from scratch - fix bugs in exist application and add additional features - add In-App Purchases and Ad Banners - intagrate your application with Facebook/Twitter/Google+/Instagram and any other social media - add cloud services to your project(Parse, Backendless, Google cloud) My main goal here is develop great apps and make my clients happy.

    $8.50 /hr
    39 hours
    5.00
  3. Nikolay G.

    Nikolay G.

    Problem solver

    Russia - Tests: 2 - Portfolio: 1

    Wide specialist: strong technical skills, mathematical background, pedagogical experience, business analytics and leadership. Was working in different roles, that covers the process of creating customer solution. Always was customer-oriented person, thinking not only about delivering product to customer, but also about resolving customer’s problems. I always keeping my promises, responding in 24 hours or keeping appointment. Don't have troubles with accidental illness of close relatives, broken hard disk or any other typical freelancer accidents, that prevents from delivering solution in time. Overall experience in IT: 13 years. Experience in software development: 9+ years. Pedagogical experience: 11+ years. Business analyst experience: 4+ years. Project management experience: 4+ years.

    $25.00 /hr
    375 hours
    5.00
  4. Mykola Velykyi

    Mykola Velykyi

    Java Desktop Developer

    Ukraine - Tests: 7

    Over the last 1 year, I have developed one project based on web server using HTML, SQL, CSS, javascript in my work. Over the last 4 years, I have developed many desktop programs using Java, C#, Python, C++ and programm style OOP in my study. When I create the application, my work consists of 4 stages: design, code, test and write documentation. I also have some experience in using XML. I am good in Mathematics. Mathematics is my hobby. I participated in mathematics competitions in many years and I took the leading places. I know and understand different algorithms. Also, I have a mathematical mind. I know parallel programming.

    $10.00 /hr
    15 hours
    4.98
  5. 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
  6. Roman Dubyk

    Roman Dubyk

    C/C++ and C#.Net Programmer

    Ukraine - Tests: 5

    I am strongly oriented on deep understanding of customer's needs and business aspects which allows me to generate appropriate software design and solutions. Having a lot of practical skills I enjoy to develop new and improve existing products and processes. Since 2000 I have developed desktop and server applications on Windows and Linux platforms with C/C++ means. And since 2008 I have expanded my experience level with C#.Net practices. My strengths are: algorithms programming, business logic investigation and development, performance optimization and data processing in addition to modern/up to date application UI generating. I'm Specialist (above Bachelor’s degree) in Applied Mathematics and Informatics. Find below my expertise and skills: - Project Management Methodologies: Waterfall, Agile, SCRUM - Quality Assurance and Issue Tracking Tools: Axosoft OnTime, Seapine TestTrack, JIRA - UML Design Tools: Microsoft Visio, Rational Rose, - Source Control Tools: SVN, CVS, Microsoft SourceSafe, Seapine Surround SCM - Programming Languages, Technologies and Libraries: C/C++/C#.NET, SQL/ADO/OLEDB/ODBC, ASP.NET, LINQ, COM/DCOM/Automation/ATL, WinINet, STL, Multithreading - Web Technologies and Frameworks: AJAX, jQuery, JavaScript, client side MVC\MVVM frameworks, Knockout.js, ASP.NET MVC, WCF, Web Forms, HTML, XML, CSS, Web Services, Authentication\Authorization - Databases: Microsoft SQL Server 2005/2008/2012, PostgreSQL, MySQL - Application Servers: Apache, Microsoft IIS - BI Tools: QlikView, JasperSoft - Twinfield API, Exact API - IDE and Tools: Microsoft Visual C++ 6.0/2005, MS Visual Studio 2008/2010/2012 - Virtualization: Citrix, VMWare, VirtualBox - Other: Estimation, Scheduling, Planning, Leading, Monitoring Thank you in advance for your time and consideration. I'm looking forward to work with you soon.

    $35.00 /hr
    125 hours
    5.00
  7. Chris Trantalovski

    Chris Trantalovski

    Microsoft Certified Professional

    Canada - Tests: 4

    I am a Microsoft Certified Professional and Microsoft Partner. I have solid working experience using the Microsoft SQL SERVER stack including SSRS, SSIS, SSAS. I've passed the following 2 exams that are required to become MCSA in SQL Server 2012: Exam 70-461 Querying Microsoft SQL Server 2012 and Exam 70-462 Administering Microsoft SQL Server 2012 Databases For the past 5 years, I've led the database development at EQAO in: - improving performance on existing systems - initiating new database practices - implementing new data models and procesess for new and existing web application initiatives (including alleviating manual processes) - designed and implemented a new BI solution using SQL Server 2008R2/2012 - documenting database coding standards to be used in the organization The most recent BI work that I've undertaken including designing: - new data model - new ETL process to load in new data model from existing sources - new OLAP database and cube using SSAS 2008 R2 - new reports via SSRS 2008 R2 as a data access medium for the web application and for quality assurance testing - migrated SSAS and SSRS solutions to SQL Server 2012 In addition to my experience with database design and development. I'm well versed in reporting using SSRS, Crystal Reports and MS Access Reporting. Contact me with any database development needs or any software development requirements.

    Groups: Microsoft Certified Professionals

    $66.67 /hr
    206 hours
    5.00
  8. Michael Ravits

    Michael Ravits

    Full-Stack Software Engineer

    Israel - 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
    856 hours
    5.00
  9. Muhammad Rehan Abbasi

    Muhammad Rehan Abbasi

    Free Lance Application Developer

    Pakistan - Tests: 4 - Portfolio: 4

    I am Software Developer by profession carrying an Engineering Degree in Computer Software. I am very determined and eager to prove my skills and competencies. I carry a good experience of over 3 years in software application development using a wide variety of tools. My core competencies include C#, C++, Java, ExtJs and Java Script programming languages. I am also quite comfortable with database tools & technologies such as SQL Server, MySQL and Oracle.

    $7.78 /hr
    492 hours
    4.93
  10. Anton Hadutski

    Anton Hadutski

    Android developer

    Thailand - Tests: 4 - Portfolio: 2

    Hi, I know how to do your app best. I developed a lot off apps with different functionality and always clients was fully satisfied by a result. Some os them you can find in portfolio below. My #1 goal will always be to meet your needs and deadline. When working on a new project, I like to speak with the client, so that I can have a clear understanding of his/her needs and vision of the project. I'm honest and fair: I will never ask you about money if work wasn't done yet. Thank you in advance for your time and consideration. I am looking forward for work with you soon. There are some app examples that I can do: — Gps Location Based apps — Coupons app including website to manage it. — News app — Any IBeacons app with BLE support. — Restaurant menu app including website to manage it. — Uber like app with web functionality — Also any other your ideas !

    $15.00 /hr
    56 hours
    5.00