Technology / Internet
Leonid Goltsblat

Leonid Goltsblat

c++, c#, java developer
Haifa, Meẖoz H̱efa


Services provided $60 / hour

Technology / Internet (9)
C# Developers
Oracle SQL
Core Java
MS SQL Developers
Java EE
C++ Developers
C++ / .NET

About Leonid Goltsblat:

- More than 30 years backend and low level programming experience including more than 25 years C/C++ experience, 15+ years of C#, 5+ years of Java and PLSQL.
- The most experience in real-time algorithm development and multithreading programming under Windows family OS.
- 30 years of DB programming (MS SQL Server, Oracle). Excellent skill in SQL query optimization and PLSQL programming.
- I have a lot of experience in analyzing, upgrading and refactoring other people's programs.
- I am an Expert in algorithms optimization.
- Full-cycle project development, including staging, algorithmic, coding, and user interface.
- My main quality: the ability to set and solve complex algorithmic problems.


• Microsoft Windows technology stack (frontend and backend):
Visual Studio: C++ (up to C++17), C, C#, SQL, Transact-SQL, dot NET 
o ActiveX/COM/DCOM/Registration Free COM/Asynchronous COM Objects, 
o STL, MFC, WIN32, multithreaded and parallel real-time programming, 
o dot NET, NET Core, WinForms, WPF, WCF, OpenXML
• Java technology stack (predominantly backend):
JDeveloper: Java, Oracle DB, PLSQL, Ant, Maven 
o Oracle ADF, WebLogic Server, JDBC, JAX-WS, JAX-RS, Jersey, Swagger, REST, JSON etc.
• Databases:
o MS SQL Server, Oracle (SQL, PLSQL)
• Source Control Software:
o Git, MS Team Foundation Server, Visual Source Safe
• Jira
• Developer skill in circuit switching and packet switching network protocols: 
o E1 (G.703), R1.5, R2, EDSS1, SS7 (MTP-ISUP), VoIP, SIP, H.323. 

Goltsblat L., Borisov K. “Techniques of effective programming on Clarion.”, Moscow, 1993

Nordic skiing, cycling, mountaineering 
Participating in the development of PJSIP - a widely known open-source library.

Russian: Native, 
English: advanced



1995-present Vulkan LLC, Moscow: Software development for telecommunications industry (C++, dot NET, C#, SQL). I am the CEO, founder and chief technical specialist of Vulkan LLC, a telecommunications company. Personally, I am involved in development of real-time multithreaded core, starting from the level of interaction with hardware, operating system, and third-party software to providing COM and dot NET APIs for higher level software.  Principal designer and main developer of off-the-shelf products digital switches (Digital Switch, Call Center, Interactive Voice Response system.)  

Experience of embedded software development (OS less) for telecommunication hardware.

2017-present FORS-IT, Moscow: software development using Oracle technologies (Java, Oracle DB, PL/SQL). My position: Senior Software Developer, backend software development and optimization. Also, occasionally UI web-development. 

Our group designs an enterprise level JAVA EE WEB application, and I am responsible for designing interfaces for interaction with external systems, as well as optimizing complex database operations and responsible for the performance-critical parts in the backend. Specifically, I used the following technologies: JDBC, JAX-WS, JAX- RS, Jersey, Swagger, REST, JSON etc. Also, I develop C# WCF services using Entity Core Framework and OpenXML. Additionally, I am involved in occasional UI web-development using Oracle ADF.

1985-1995 «VCKP Zelenograd», Zelenograd, Moscow: Software developer. Municipal services automation platform. Database and user interface development in Basic then Clarion and pure C.


1978 —1984 Physics of metals National University of Science and Technology MISiS.  Engineer-physicist (M. Sc. in Engineering Physics), Department of Theoretical Physics, Faculty of Physics and Chemistry.

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