Олександр

Oleksandr Tkachenko
Full-Stack .NET Developer
Kharkiv, Ukraine | Open to Remote | Part time
E-mail: [відкрити контакти](див. вище в блоці «контактна інформація»)
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Full-Stack .NET Developer with extensive experience in enterprise software development, including large-
scale B2B platforms, ERP, CRM, insurance, healthcare, and automotive systems.

Experienced in designing and developing web applications, REST APIs, SOAP services, database solutions,
and business-critical software.

Strong background in database design, performance optimization, integration of external services, and
development of scalable business applications.
TECHNICAL SKILLS
Backend:
C#, .NET Framework, ASP.NET Core, ASP.NET Web API 2, RESTful APIs, SOAP Services, Entity
Framework, ADO.NET, LINQ, Hangfire

Desktop:
WinForms, WPF

Frontend:
AngularJS, Angular, JavaScript, TypeScript, jQuery, Bootstrap
Databases:
MS SQL Server, T-SQL

Search & Caching:
Elasticsearch, Meilisearch, Redis
Tools: Jira, Confluence, Bitbucket, Git, Visual Studio, Postman, Talend API Tester
Integration:
1C Integration, Supplier Systems Integration, Third-Party Services Integration
AI Tools: ChatGPT, OpenAI Codex — AI-assisted coding, code analysis, debugging, and personal project
development.

WORK EXPERIENCE

SkyTech
Full-Stack .NET Developer
jan 2018 – Present
Development and support a large B2B automotive e-commerce and procurement platform used for auto
parts sales, supplier integrations, pricing management, inventory management, warehouse operations, and
business process automation.

Worked as part of a development team responsible for delivering and maintaining functionality used by
more than 10,000 active B2B customers.
Key Contributions:
• Participated in the development of supplier integrations for product catalog, pricing, and inventory
synchronization.
• Developed integrations with 1C services for product catalog synchronization, pricing updates, inventory
management, and business process automation.
• Contributed to the implementation and enhancement of product search functionality.
• Developed and maintained order basket functionality supporting complex ordering workflows and business
rules.
• Participated in the development and optimization of pricing modules and supplier price processing.
• Implemented functionality for inventory availability and warehouse stock management.
• Optimized SQL queries, stored procedures, and data processing operations to improve system performance
and response times.
• Developed background jobs and scheduled processes.
• Contributed to the development and maintenance of business-critical functionality used by more than
10,000 active B2B customers .
Responsibilities:
Development and maintenance of REST APIs and business services
Integration with external supplier systems and third-party services
Development of AngularJS and Angular frontend modules
Design and optimization of MS SQL Server databases, stored procedures, and queries
Implementation of search functionality using Elasticsearch and Meilisearch
Development of background jobs and scheduled processes using Hangfire
Performance optimization and troubleshooting
Participation in system architecture discussions and code reviews
Technologies:
C#, .NET Framework, .NET Core, ASP.NET Web API, MS SQL Server, Entity Framework, AngularJS,
Angular, TypeScript, JavaScript, Elasticsearch, Meilisearch, Redis, Hangfire, Swagger, REST API, SOAP
Services, 1C Integration

Richloud Solutions
Software Engineer
jul 2017 — nov 2017
Development and customization of Microsoft Dynamics CRM solutions.
Responsibilities:
Development of CRM business logic
Creation of plugins, workflows, and custom entities
Development of dashboards, forms, and web resources
Integration with external services

Maintenance and enhancement of existing CRM functionality
Technologies:
Microsoft Dynamics CRM, C#, JavaScript, HTML, jQuery, Web API.

GSApps
Software Engineer
jun 2014 – jul 2017
Development of web applications and backend services for enterprise customers.
Responsibilities:
Development of REST APIs and backend business logic
Database integration and data processing
Frontend development using React and JavaScript
Support and enhancement of existing functionality
Technologies:
C#, ASP.NET Web API, Entity Framework, LINQ, React, JavaScript, MS SQL Server.

Lemma Insurance Company
Software Engineer
apr 2009 – mar 2014
Development of healthcare, insurance, and document management systems.
Responsibilities:
Design and development of desktop applications
Database design and implementation
Development of business logic and user interfaces
Maintenance and enhancement of existing systems
Technologies:
C#, WinForms, ADO.NET, DevExpress.

SweetSoft INC.
Software Engineer
feb 2008 – mar 2009
Development of ERP solutions for manufacturing enterprises.
Responsibilities:
Development of business modules and user interfaces
Implementation of business logic
Development of reports and data processing functionality
Participation in testing and system maintenance
Technologies:
C#, ASP.NET Web Forms, WinForms, ADO.NET, DevExpress, MS SQL Reporting Services.

Svet Shahtera
Software Engineer
2005 – 2008
Development and support of enterprise information systems.
Responsibilities:
Development of database objects, including tables, views, stored procedures, and functions
Development of web application modules and user controls
Creation of reports and printed forms
Support and enhancement of existing functionality
Technologies:
C#, ASP.NET Web Forms, MS SQL Server, XML, Crystal Reports.

EDUCATION

Kharkiv National University of Economics
Engineer-Programmer
Information Management Systems and Technologies 2005

LANGUAGES
English. Able to read technical documentation and understand written technical content and work
discussions.
Ukrainian
Russian

CERTIFICATE
98-361. Software Development Fundamentals.

ADDITIONAL INFORMATION
Strong problem-solving and analytical skills, team player with experience in Agile/Scrum environments,
focused on software quality, performance, and maintainable code, quick learner with strong business domain
understanding.