Software Freelancers

Clear all filters

Dima Knivets

Dima Knivets

Software Consultant

Ukraine - Tests: 12 - Portfolio: 4

3 years at Upwork, 30 successful contracts and 30 satisfied clients. 5 years of programming experience. At the moment, I'm working mostly with a Ruby on Rails stack: both frontend and backend. I have a deep understanding of how the whole ecosystem works together, so I can deliver not only the application, but also a whole infrastructure for it: starting from a fresh server, configuring the environment, deploying the application and configuring continuous integration. I can also join the projects that are already in production and maintain or improve existing codebases. Previously, I used to do a lot of frontend stuff using HTML, CSS, JavaScript and jQuery. A bit later, I worked with more complex frontends using JavaScript frameworks like Angular.js and React. I know node.js well too, but I don’t have as much experience with it, as I have with Rails. But still, I can easily build apps using these technologies and setup both development (with building tools like Gulp/Grunt, preprocessors like SASS/LESS, uglifiers and code checkers) and production environments. Before frontend I used to work mainly with WordPress and PHP stack (Yii, Symfony, Drupal, modx, etc). When I’m not working for someone else I learn, polish or practice stuff like internet protocols, compilers and low level stuff, data structures and algorithms, distributed systems and parallel programming. My next goal is data science (machine learning, deep learning and data mining), so I’m boosting my math skills in my free time.

Groups: Bluehost Developers and Designers, Crossrider

$50.00 /hr
447 hours

Alex S.

Alex S.

Software Engineer

Ukraine - Tests: 3 - Portfolio: 2

I've got my first computer when I was 7 years old. One week later first program was ready. Programming languages and processors have changed but I can't stop till today. I help people transform ideas into websites and applications. I try to understand how things work, only after I build a solution that picks up business to the next level. I can guide client over the bridge between business process and IT, providing consulting on all steps from choosing technology to deployment and maintenance. My biggest passions in my work are algorithms and distributed systems. I believe that fundamental theory in computer science is a basis for significant achievements. It's important that every new day brings new knowledge. Based on my experience in software development, work approach boils down to the following rules: - do something only if you have all required information - if you don't have required information - ask questions - if you don't know how to do - you should know how long can it take to learn

Groups: Coding Champs

$33.33 /hr
972 hours

Joel Taylor

Joel Taylor

Software Engineer

United States - Tests: 3 - Portfolio: 1

Motivated full-stack software engineer with experience developing scalable and maintainable applications. Possesses extensive knowledge in using Ruby on Rails and other frameworks as enterprise solutions. Complies with TDD methodologies and object oriented concepts to produce quality and efficient code. Self-driven in order to foster betterment on a daily basis. Skills include: Ruby / JavaScript / Node.JS / SQL / NoSQL / REST / MVC / Web API

$50.00 /hr
298 hours

Darren Davies

Darren Davies

Software Engineer

United Kingdom - Tests: 2 - Portfolio: 2

A professional Software Engineer based in the England (North East). BSc (Hons) Computer Science, Microsoft Certified Professional and Microsoft Specialist. Experience in the following technologies: C#, C, C++, Delphi, VB6, VB.NET, ASP.NET MVC (nHibernate, Fluent nHibernate, Entity Framework), ASP.NET, Java, PHP, SQL, T-SQL, SQL Server, MySQL, SSRS, SSIS, SharePoint (2007, 2010, 2013), mIRC Scripting, Workflow, K2 BlackPearl, HTML, HTML5, CSS, jQuery and JavaScript.

$70.00 /hr
935 hours

Evgeny S.

Evgeny S.

Senior Software Engineer

Russia - Tests: 4 - Portfolio: 6

I am an independent software engineer with a very broad range of development skills and technologies. I most enjoy working in small innovative teams and with individual decision makers to help grow their ideas into mature and robust software systems based on modern technological foundations. I'm also not a stranger to big software companies, and I can be a reliable team member as well as a small group project architect/leader when needed. I have experience with the following technologies: - C++, Python, JavaScript, C#, Java - Nginx, Gunicorn, Gevent, Flask, Django, jQuery, Node.js, Apache. - MS SQL, DynamoDb, Amazon SDB, MySQL, Redis, NoSQL. - Linux, Amazon EC2, SQS, SNS, S3, RabbitMQ. - Win32 API, HTML5, Android, NDK, GTK, WinForms I'm also eager to extend my experience in cutting edge technologies and programming languages like Golang, Erlang, Nim, Rust, Haskell... I am looking for the opportunity to design and build a system from the ground up for you!

$45.00 /hr
2,572 hours

Andriy P.

Andriy P.

Senior Software Engineer

Ukraine - Tests: 10 - Portfolio: 9

Have 10 years of commercial software development experience. 6 years, I work with Adobe Flex 3/4 and AIR technologies. Using MVC, design patterns, PureMVC / Caingorm / Mate / Robotlegs frameworks, strong knowledge of performance issues solving, memory leaks, working with large data sets in Flex, custom components development, spark skinning. Last 4 years, I work as senior Ruby on Rails engineer. Using Ruby, Ruby Rails, Javascript / Coffeescript, CSS / SCSS, HTML5 / HAML, Bootstrap, Backbone, AngularJS, Handlebars, jQuery, Ajax.

$40.00 /hr
2,495 hours

Stephane Travostino

Stephane Travostino

Systems and software specialist

United Kingdom - Tests: 8 - Portfolio: 3

I like working on anything revolves around the IT ecosystem, and find the most fun in troubleshooting problems and working around strict requirements and deadlines. My main skill is discovering the root cause of a problem and working out the best solution in a very short time. I am a very fast learner and have a vast skill set to assist in any kind of necessity, as long as it runs on a computer. I'm a self-taught Linux systems administrator, full stack developer and jack of all trades in systems design and maintenance. I have experience with system internals and administration, C and Python programming, software design and management, Linux and Solaris operating systems, and high expertise in maintaining and tuning MySQL databases. I also develop modern and rich web applications with HTML5 and modern Javascript. Other interests in web design, typography and improving team processes and workflows.

$66.67 /hr
1,089 hours

Wallace Ferreira

Wallace Ferreira

Software Analyst/Developer

Brazil - Tests: 10 - Portfolio: 2

Hello, my name is Wallace. I've been working with software development for over 9 years. I acquired a lot of experience developing applications using Visual Basic, C/C++, PHP and Java. My expertise is analyzing and developing Desktop and Web Applications such as: + Crawlers/Web Crawlers - Collecting and storing data from sites, documents, videos, photos, social media sites, classified ads sites, etc. + Web Data Scrappers - Extracting, parsing, filtering and storing relevant data from web pages to readable and manageable formats like Excel, CSV, HTML, etc. + Bots and Automation scripts - Extracting and making business decisions out of data from documents like PDFs, Excel, CSV, XML, TXT, etc. - Sending email reports automatically - Auto filling forms - Price comparison apps - Event notifiers + Data conversion/transformation - Transforming/Converting data between formats for import/export in different applications. - Feed generation - Report construction + API development/integration - Adding support for third parts services - Creating interfaces for communication between systems. I have developed dozens of applications for a wide range of application domains including: - E-Commerce sites (like Amazon.com, Walmart.com, ToysRus.com, etc) - Financial market - Market research groups - Medical related groups - Shipping companies - And several other personal applications. Some formats I have expertise in are: - JSON - XML - SQL - CSV - PDF - TXT - HTML - XSL - XSLX - And others Acting as an analyst and developer, I gained experience with modeling relational databases and SQL, with a focus on MySQL DBMS. Since 2009, I have been working for a company that develops software for the financial market - EconoInfo (http://www.econoinfo.com.br). In 2012, I graduated in Computer Science at the Pontifical Catholic University of Minas Gerais - PUC Minas. Over the past four years, I specialized in Java development, especially Java EE 6.0, focusing on technologies EJB, JPA, JSF, JMS and JCR. Acting as an analyst and developer, I gained experience with modeling relational databases and SQL, with a focus on MySQL DBMS. As a developer in charge of creating the EconoInfo website's interface, I also specialized in Servlets, HTML, JavaScript and CSS.

$33.33 /hr
1,277 hours

Lalatendu K.

Lalatendu K.

Senior Software Developer

India - Tests: 17 - Portfolio: 8

I have been in the software industry for last 15 years after completing my MCA. I started my career as a software developer, and worked on web applications then I shifted to Android app development. As a Freelancer I am involved with development of website & database , Android application, caspio app development and Testing . Specialization: Caspio ,WEB API (WCF, REST), PHP , MYSQL , JavaScript , jQuery , AngularJS , CSS3 , d3.js , MSSQL SERVER , ORACLE, Android, SQLite , c#, Asp.net MVC ,LINQ , Entity Framework, SSRS , Crystal Reports , .net RDLC Reports , PrestaShop ,WordPress (multi-site , WooCommerce), Payment Gateway Integration (Paypal PG , Braintree PG and Swipehq PG) & Bootstrap. Thanks, Lalatendu

$20.00 /hr
2,869 hours

Ioannis F.

Ioannis F.

Java Software Engineer

Greece - Tests: 4

Senior Software Engineer. During the last 11 years I have worked on developing a large number of different applications and/or components, including web applications, CMS, RESTful APIs and server-side components for mobile applications and mobile marketing. Core technologies and frameworks involved were Java, Spring/Spring MVC, Jersey, JPA & Hibernate, JSP, XML, HTML, CSS and a range of JavaScript libraries and frameworks. I have extensively used a large number of software engineering tools, including Maven, Ant, Nexus, Hudson, Bamboo Subversion, Git. I'm eager to use new and fascinating technologies for development of state-of-the-art applications.

$45.00 /hr
4,428 hours