Stepan Yakovenko, Developer in Novi Sad, Vojvodina, Serbia
Stepan is available for hire
Hire Stepan

Stepan Yakovenko

Verified Expert  in Engineering

Software Developer

Location
Novi Sad, Vojvodina, Serbia
Toptal Member Since
January 8, 2016

Stepan is an experienced software developer with over seven years of development experience. He has been programming since the age of 15. Most of his work has been in C++, Java, JavaScript, SQL, PHP, and C#. He is always ready to learn something new and is especially interested in complex tasks. He has been working remotely as a contractor since 2010. To sum up, he is a solid developer with excellent communication skills.

Portfolio

Dataloft
Node.js
ILFIRON
jQuery, Express.js, JavaScript, Node.js, CSS, HTML
TripTop Technologies
Spring, Apache Tomcat, Git, Grunt, Less, CSS, Jakarta Server Pages (JSP), HTML...

Experience

Availability

Part-time

Preferred Environment

Windows 7, Linux, Microsoft Visual C++, IntelliJ IDEA

The most amazing...

...thing I've done was clone Google documents. It was a complex JavaScript app with collaborative editing support.

Work Experience

Software Architect

2015 - PRESENT
Dataloft
  • Prototyped an online teleconferencing solution, and also constructed both the server and the client side. Used Mongodb and Node,js on the server side, and jQuery, UI, and HTML/CSS on the client side.
Technologies: Node.js

Software Architect

2014 - PRESENT
ILFIRON
  • Programmed the JavaScript kernel for www.collab-office.com. Collab-office is an online DOCX collaborative editor based on a HTML5 canvas.
  • Researched and chose the technology, created the prototype, and invented an approach for collaborative XML editing.
  • Reverse-engineered the DOCX format, implemented outer layer, and solved the cross-browser portability issues.
  • Implemented unit tests.
Technologies: jQuery, Express.js, JavaScript, Node.js, CSS, HTML

Java and JavaScript Developer

2013 - 2014
TripTop Technologies
  • Aided in the development of online travel booking services (flights, charters, hotels, transfers, etc), on the website http://www.yestravel.co.il.
  • Integrated the GWT and AngularJS web component into the affiliates’ websites to allow direct booking via the main websites’ visitors. Tomcat was used as server, as it accumulates travel products from travel service providers.
  • Created the personal cabinet that allows the site to store user information, download documents. Migrated the payment wizard to AngularJS from JSP pages, improved integration with a Pelecard online-payment system.
  • Constructed the client part of the online transfer booking system, and also participated in fixing bugs in the legacy GWT code.
Technologies: Spring, Apache Tomcat, Git, Grunt, Less, CSS, Jakarta Server Pages (JSP), HTML, JavaScript, PostgreSQL, Java, Swing, GWT, jQuery

Java and C++ Developer

2011 - 2013
Accusoft Pegasus
  • Worked with a team of ten international developers (all from India, America, and Russia) to create a product made with Image Gear Java Bean; the beta version was released.
  • Participated in development of Prizm ContentConnect in an international team of 10 people. Fixed bugs in a document conversion kernel; also fixed or ported web interfaces between platforms (PHP, C#. VB.NET, and JSP). Supported a legacy FLASH viewer for SWF documents.
  • Ported image compression algorithms (GIF, JPEG, PNG, TIFF and many others) from C#/C to Java and sometimes using JNI.
  • Proposed and promoted a sophisticated solution of a critical document-rendering fidelity issue that saved the product place in the market; the solution works in yahoo mailboxes.
Technologies: Jakarta Server Pages (JSP), C#, Flash, PHP, Ant Design, Java, JNI, С++

Java/JavaScript/C++ Developer

2008 - 2010
Development on the Edge
  • Worked on the Territorial Information System of Novosibirsk Oblast (a federal subject of Russia). The system stores data about people living in the region, their attributes (documents, addresses, marital status, social categories, and so on) and calculates the amount of social welfare that these people receive every month.
  • Participated in a short-term project for computer tomography; provided support (fixing bugs, improving interface) of the Java applet and C++ WIN32 executable.
  • Developed a JavaScript-based object web platform for displaying and editing detailed citizen's personal information.
  • Created the interface for editing KLADR (Russian State Address Database) that was also employed in another project (Federal Veteran Database) that is used in all regions of Russia.
  • Implemented the double-entry bookkeeping system which all of the payment transactions are recorded. The system is implemented as a Java web application for Apache Tomcat and the database is made with Oracle 11g.
  • Created the DatABEL project almost from scratch, improved the speed, implemented caches, filed the handle pool, and compared its speed with other similar projects. DatABEL is a data analyzing facilitator package of large (giga- to tera-bytes) matrices; matrix storage is organized in either columns or rows so that they are quickly accessible. It’s primary aim is to support genome-wide association analysises. The package is a C++ plugin for R (a language and environment for statistical computing and graphics). The plugin allows processing, loading, saving, and transposing large amounts of data even if they don't fit into memory. It is implemented in GNU C++, designed in mind for four operating systems (Windows, Sun OS, Mac OS, Linux) with some parts implemented in R.
Technologies: CSS, HTML, JavaScript, M4, Oracle SQL, R, Valgrind, GCC, Jakarta Server Pages (JSP), Java, Apache Tomcat

C++ Developer

2008 - 2008
BCS-IT
  • Developed extensions for Microsoft Remote Desktop with Microsoft Visual Studio.
  • Created a prototype of the final system that was designed to speedup OpenGL 3D graphics that was transferred over an RDP connection.
  • Replaced the OpenGL system DLL by a version that sends OpenGL commands over RDP and executes them directly on the client screen instead of sending uncompressed images that slow down data exchange.
  • Developed the code-generation algorithm for serialization of the OpenGL commands for the final version.
Technologies: Remote Desktop Protocol (RDP), Extensions, OpenGL, Microsoft Visual Studio

Java and JavaScript developer

2007 - 2007
Softmotions Ltd.
  • Participated in the development of a university information system. This system stores and manages data that refers to all aspects of the educational process: academic curriculums, student data, exam results, faculty finances, and so on. The system is deployed in Novosibirsk State University.
  • Developed Hibernate and SQL queries, XUL pages, WEB applications, and UJAC reports.
  • Maintained, and created new JavaScript and Java code.
Technologies: JavaScript, Java, Hibernate, IBM Db2, XUL, CSS, HTML

Win32 C++ Developer

2006 - 2006
DataDynamics
  • Developed projects at the DataDynamics (www.datadynamics.com): the DynamiCube OLAP product, ActiveBar, SharpGrid, and ActiveReports.
  • Created the automated build system for ActiveReports and DynamiCube.
Technologies: Microsoft Visual Studio, Win32, COM

C++ Developer

2005 - 2006
LEDAS
  • C++ developer of LGS3D solver at LEDAS. LGS3D is a computational component used in heavyweight CAD systems. During my work I have implemented support for spheres, created quick test platform. I've also inspired massive code refactor, that allowed to redouble solver speed using delicate tuning.
Technologies: Numerical Methods, Microsoft Visual Studio, C++

Prizm Content Connect

https://www.accusoft.com/demos/advanced-search/
Created essential pieces in this online document viewer (mostly server-side), which allowed a net gain of high document fidelity and high perfomance.
1998 - 2005

Master's Degree in Physics and Physical Informatics

Novosibirsk State University - Novosibirsk, Russia

Libraries/APIs

HTML5 Canvas, Digester, JAXB, Java Servlets, Node.js, Jackson, JDBC, Standard Template Library (STL), jQuery, FFTW, ODBC, OpenGL, XStream

Tools

Subversion (SVN), Apache Ant, Mime4J, YourKit, IntelliJ IDEA, Apache Tomcat, Git, GCC, Cygwin, Apache Maven, Microsoft Visual C++, Valgrind, Microsoft Visual Studio, Eclipse IDE, UJAC, Flash, Mathematica, Perforce, CVS, GNU Debugger (GDB), Grunt, JDeveloper

Frameworks

GWT, JUnit, Hibernate, AngularJS, Jakarta Server Pages (JSP), Spring, JNI, Selenium, Express.js, Swing, Ant Design, ASP.NET, Apache Velocity

Languages

HTML5, CSS, Java, JavaScript, C++, Less, XPath, HTML, С++, C#, M4, PHP, R, XSLT, XUL

Platforms

Debian Linux, Windows, Linux, Windows 7, Win32, NetBeans

Storage

MySQL, Morphia, MongoDB, Oracle SQL, PostgreSQL, IBM Db2

Other

Extensions, Remote Desktop Protocol (RDP), Numerical Methods, Ajax, COM

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring