Особисті дані приховані

Sergii Kovalchuk
Senior .NET/SQL Engineer

Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
Mob: [відкрити контакти](див. вище в блоці «контактна інформація»)
Links: LinkedIn, GitHub
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I’m a software developer with more than 20 years of experience, who has worked on many
awesome projects in different business domains. I love to share my expertise, especially
when it makes projects better. I’m a good team player with strong self-motivation and always
strive to do the best I can to make a project successful. I love to learn and apply new
technologies, which will make people's life better, as well as using proven and reliable
approaches. Along with usual software development activities, I have experience in tech
leading, interviewing external candidates, driving technical meetings, technical presentations
and knowledge sharing, mentoring, development process optimization, searching for 3rd
party products for project needs, design and architectural decisions making, taking part in
delivery, etc.

Goals
I’m looking for a position as a Senior or Middle .NET Engineer or similar and may also be a
good fit for a Tech Lead role. Although my main focus is .NET, I’m not limited to it. I am also
experienced in SQL and able to work with SQL codebases of any complexity. I can
contribute to DevOps activities as well.
I’m passionate about software engineering and everything related to it. My interests are
broad and include development of web applications, microservices (or migration from
monoliths to microservices), desktop applications (WPF or Avalonia) in many different
business domains like healthcare, finance, miltech, AI, robotics, aerospace domain, etc.​
I love to learn new techs and I have experience with other programming languages, so I can
easily adapt to development in other tech stacks.

Education
National Technical University of Ukraine 'Kyiv Polytechnic Institute', 2006
Specialist, Information Control Systems and Technologies

Languages
Ukrainian (Native), English (Upper-Intermediate)
Technologies
SDLC: Scrum, Kanban, Waterfall, etc

Concepts and patterns: YAGNI, DRY, KISS, SoC, SOLID, Design Patterns (GoF),
Dependency Injection, Clean Architecture, Microservices, CQRS, DDD, UML, REST,
GraphQL, Message Bus, AAA, FIRST, DSL, Kerberous, OAuth 2.0, etc

Core frameworks: .NET, .NET Core and .NET Framework, EF/EF Core, ASP.NET Core,
WPF, Winforms, XUnit/NUnit/MSTests, etc

Other frameworks and libs: Serilog, NLogs, Dapper, Moq/NSubstitute/FakeItEasy,
AutoMapper, Autofac, SimpleInjector, FluentAssertions, FluentValidation, FluentMigrations,
Refit, Polly, WCF, etc

DB and messaging: SQL Server, MongoDB, PostgreSQL, Redis, Kafka, RabbitMQ

DevOps and infrastructure: Git, Docker, Powershell, IIS, Azure DevOps, GitLab, GitHub,
OpenTelemetry, Prometheus, Graphana, Azure, Perforce

Also had experience with: Unity, Java, Eclipse IDE, HTML5/CSS/JavaScript using
AngularJS, Bootstrap, Foundation (css), MassTransit, HotChocolate, Mercurial, Python;
C++, ActionScript, Lua, etc

Experience
Senior Engineer (DevOps/.NET) at Ukrposhta
January 2026 - Present
As a Senior Engineer I take part in management of IIS servers and development of .NET
applications.

Senior .NET/SQL developer at PAR Tech
October 2023 - January 2026
As a senior back-end and SQL engineer I took part in development of one of their products
by development web services and legacy UI desktop client (Winforms) as well as
development systems of stored procedures like a sophisticated DB reports

Own open source projects
July 2023 - October 2023 (3 months)
Taskforce - example of the Clean Architecture implementation. sk0va.Repository - library for
implementation of the Repository pattern. You may find these projects on my GitHub:
https://github.com/sk0va
Senior Back-End Engineer at iDeals
Sep 2022 - June 2023 (8 months)
As a senior back-end engineer I took part in development of one of iDeals products.

Senior .NET Developer at SoftServe
Sep 2015 - Aug 2022 (7 years)

I took part in development of several projects (mostly on the backend side) in different
business domains, including sales, bid management, healthcare, and even CAD systems. I
have provided about 40 technical interviews on a company-wide level. Also I had a tech lead
role on a few projects.

Have experience with:
● Mentoring teammates
● Providing technical interviews
● Technical leading
● Taking part in application architecture design and review
● Communication with technical leadership from customer side
● Leading technical meetings
● Designing, discussing and reviewing development conventions
● Designing, setting and reviewing CI/CD pipelines, development processes and
environments
● Managing Azure and Azure DevOps accounts
● Maintaining technical documentation
● Few company-wide technical presentations
● R&D
● Development activities
● Code reviewing

Concepts and patterns: Scrum, SOLID, DI, GoF, YAGNI, UML, REST, Clean Architecture,
DDD, CQRS, ServiceBus, Microservices, DSL, AAA, FIRST, etc

Base technologies: .NET Framework/.NET Core (EF, WebApi/ASP MVC), Relation DBs,
Docker, Git, RabbitMQ, Azure DevOps, Azure

Additional frameworks and libs: Json.NET, Serilog, SimpleInjector, Autofac, AutoMapper,
FluentValidation, XUnit/NUnit/MSTests, Moq/NSubstitute/FakeItEasy, FluentAssertions, Refit,
Polly, etc
Senior Programmer at Persha Studia (Wargaming.net)
September 2012 - May 2015 (2 years 9 months)

Took part in a development of CI and game tools for designers in WoWP project. Designed
and developed packaging tool for CI pipeline. Created and developed XmlEngine framework
and its DSL. This engine provides a translation of files system objects as any user-friendly
hierarchy of abstractions. Rules of translation defined via special xml-based domain specific
language. Also developed based on XmlEngine desktop tools for managing game resources
in content branches.

Responsibilities:
● Designing and developing software projects from architecture to code.
● Testing
● Partial requirement analysis and task specifications.
● Initiating and taking part in technical meeting and presentations
● Interviewing new applicants for technical skills
● Technical consultations

Senior Programmer at Nikitova LLC
August 2010 - September 2012 (2 years 2 months)

Took part as a software developer in different projects in different technology stacks. Most
interesting of them:
● Naval session MMORPG - NET/Mono/Unity3D, server and client part
● Trash Tycoon - backend in Java
● EA core projects - wrote .NET unit tests without reference documentation and code (like
a black box)
● Tools for game designers for managing items

Own open source projects
Json Notepad - HTML based visualizer of JSON objects.
https://github.com/seoriy/Jsonnotepad

Web developer at Euro Project
April 2010 - July 2010 (4 months)

Took part in development and improvement of existed web site Caravaning.com.ua
Provide photo gallery installation and integration with the site. (Php)
Software developer at Mirasoft
May 2009 - September 2009 (5 months)

Took part in development of accounting system for clinics: developed billing system, which
used for exchange payment transactions between public offices and clinics; developed
multi-layout panel which supports animated switching various layout modes in realtime;
developed paging data presentation subsystem; took part in bug fix and some features
implementation.

Senior Programmer Software Products Applied Developer at Artmaster
January 2008 - December 2008 (1 year)

Took part in development of the statistics system and workflow in government authorities:
worked on different tasks. Developed data import tools from the previous statistics authority
system (inherited from another company). Tools contains: analysts application for composing
mapping scheme – main input of engine for data transportation. Data conversation engine
mechanism for data transferring from source database (used before installation of our
product) to destination database (used by Art-masters product).

Software developer at Bankomzvyazok
August 2005 December 2007 (2 years 5 months)

Took part in development of CRM-system «Oblik CRM» versions 3.2 and 3.3 Since
December 2006 has worked on development of the authoring system based on «Oblik
CRM» 3.3 framework for Ukrainian National Council for TV and Radio Broadcasting. I was
working as a developer, analyst and technical specialist. The product used the «Oblik CRM»
framework, but had a totally different domain model and its own master-detailed views. Also,
the project contains a mapping module to display information on the broadcasting map.

Software developer at UMH mobile
October 2004 - April 2005 (7 months)

Took part in development of mobiles content provider system for GSM networks. Modules
interact with the mobile operators via protocols POP3/SMTP (UMC, Jeans) and processes
end user requests via MSMQ. I was developer of content management
application. Also, worked as administrator for SQL Server and Microsoft VSS.

Software developer at Information Technologies
June 2003 - July 2004 (1 year 2 months)

Took part in development of “IT-Predpriyatiye” and its modules “IT-Predpriyatiye .NET”