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Sergey Korobeynikov

Sergey Korobeynikov

.NET Core / Full-Stack Developer

Semey, Abay region (KZ)

Skills

.NET Development

Senior
  • .NET Core
  • EF Core
  • XAF DevExpress

Web Development

Senior
  • TypeScript
  • HTML
  • CSS
  • Nuxt.js
  • Tailwind CSS
  • OpenLayers
  • SignalR

RDMS

Senior
  • Microsoft SQL Server
  • PostgreSQL

Smart card technologies

Senior
  • EMV
  • MIFARE

Operating Systems

Master
  • Windows Server
  • Linux
  • CentOS
  • Debian
  • Ubuntu

Networking and Telecommunications

Master
  • IP-PBX
  • Asterisk
  • E1
  • PRI
  • Cisco
  • MikroTik
  • RouterOS
  • BGP
  • OSPF
  • BFD
  • VPN
  • IPSec
  • IKEv2
  • SSTP
  • netflows

Work Experience(3)

Dec 2022 - Current
Co-Founder & Full-Stack Developer
Semey, Kazakhstan

Designed and engineered scalable location-based platform architecture and full-stack services using .NET Core, Nuxt.js, OpenLayers for geospatial visualization, and SignalR for real-time services.

Feb 2016 - Current
Telecommunications Engineer (Contractor)
Aykhal, Sakha Republic, Russia

Provision of comprehensive support for the enterprise telecommunications infrastructure:

  • Designed and implemented a resilient corporate LAN with traffic failover and redundancy based on BGP routing protocol.

  • Migrated legacy telephony infrastructure to IP telephony using an Asterisk-based IP-PBX system.

Aug 2010 - Sept 2022
Novosibirsk, Russia

Provided comprehensive support for enterprise IT infrastructure and proposed improvements to optimize business processes:

  • Designed and deployed corporate IT infrastructure, including Active Directory-based network, Microsoft SQL Server database, mail system (Postfix, Dovecot, Roundcube), and Asterisk-based telephony solution.

  • Designed, developed, and implemented a microloan application processing system for small business clients, enabling remote submission and workflow automation using .NET Core and DevExpress XAF.

  • Developed a financial reporting system for cash flow reporting to the Central Bank of the Russian Federation using .NET Core and DevExpress XAF.

  • Designed a data model for integration and reporting of borrower information to credit bureaus, including Equifax and the National Bureau of Credit Histories (NBKI).

  • Developed data exchange tools integrating the Federal Treasury “Electronic Budget” system with 1C, enabling automated data synchronization between platforms.

Projects(4)

Dec 2025 - Current
Call-center 2.0
  • .NET Core
  • Asterisk
  • AMI
  • FastAGI
  • Queue
  • CDR
  • CEL
  • AEL
https://www.telecom-project.kz/asterisk/contact-center

Designed and developed a supervisory management system for Asterisk, enhancing its base capabilities to support call center supervision and executive-level reporting:

  • web interface for interaction;

  • real-time monitoring of queues and active connections with the ability to respond quickly to changes and adjust operator workflows;

  • operator authentication for creating shared workstations (service level includes queue handling, whisper coaching features, and access to international calling, available from any location, with all actions properly reflected in statistics and reports);

  • call distribution based on operator skills and competencies;

  • call hold and retrieval after a failed blind transfer;

  • incoming call routing to a shared number based on the caller’s previous contacts (calls or missed calls);

  • access to call detail records and call recordings with role-based access control and information security requirements.

Apr 2025 - Jun 2025
Hamster
  • .NET Core
  • Microsoft SQL Server
  • Smart Cards
  • EMV
https://xylocode.ru/hamster

Software for automating the accounting of employee compensation for meal expenses, provided either in kind or in monetary form, as stipulated by an employment contract or collective agreement.

  • Designed and implemented loosely coupled integrations with HRM systems for employee master data synchronization and payroll deductions export.

  • Developed a flexible configuration system for meal compensation policies, including minimum purchase thresholds, daily limits, and compensation frequency.

  • Implemented employee identification via existing EMV bank cards.

  • Built reporting module with three report types: detailed cash report, receipt analytics by weekday, and aggregated summary report.

Mar 2025 - Current
.NET/C# library for smart cards
  • .NET Core
  • Smart Cards
  • EMV
  • ICAO 9303
  • eMRTD
  • mDLs
  • DESFire
https://xylocode.ru/smart-cards

A ready-to-use tool for a wide range of trusted identity use cases: bank cards (EMV), machine-readable travel documents (eMRTD, ICAO 9303), driving licences (mDLs, ISO/IEC 18013), transit cards, as well as DESFire-based credentials.

Oct 2023 - Current
CDEK .NET API client library
  • CDEK
  • .NET Core
  • API
  • REST
https://www.nuget.org/packages/XyloCode.ThirdPartyServices.Cdek

Developed an unofficial open-source .NET client library for the CDEK API v2.0 with full endpoint coverage.

Education(1)

Sept 2004 - Jun 2009
Specialist Degree Major in Industrial Automation for the Energy Industry

Languages(3)

Russian

Native speaker

English

Upper-Intermediate

Kazakh

Intermediate

Interests(3)

Geography

  • Trips
  • Urbex
  • USA
  • Balkans

Amateur radio

  • R9ODS
  • AnyTone
  • Yaesu
  • 73

Cooking

  • Shashlik
  • Pork ribs
  • Ear
  • Italian