Ілля

Illia Tereshchuk
.NET Software Engineer
Lutsk, Volyn oblast, Ukraine
[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)

Summary

• 4 years with .NET, from small desktop utilities to large enterprise systems.
• Worked in both enterprise environments and freelance projects.
• Done backend and frontend, covering everything from database to UI.
• I spend a lot of time testing various solutions to choose the best.
• I double-check my code and prefer simplifying over complicating.
• I like speaking English, and I care to be understood by others.

Skills

• Programming Languages:
C#, JavaScript, C, C++, SQL
• Frameworks & Libraries:
.NET Framework, ASP.NET MVC, Windows Forms, WPF, Windows Services, Entity Framework, LINQ
• Web Technologies:
REST API, HTML, CSS, Bootstrap, jQuery, SignalR, Knockout.js
• Databases:
MS SQL, MySQL, Stored Procedures, Database Design
• Tools & Platforms:
Visual Studio, Git, SVN

Experience

T4B | .NET Software Engineer | Warsaw, Poland | January 2024 – June 2025
C#, MS SQL, Windows Services, SVN
Developed a system for a telecom provider to monitor and manage mobile internet data usage.
• Created a Windows Service in .NET Framework using C#, serving as the core application for tracking
and reporting.
• Used ADO.NET, Entity Framework and stored procedures to interface with a MS SQL database.
• Provided dynamic quota management features, allowing administrators to set data usage limits and
define specific responses, such as user notifications and tariff adjustments.
• Produced detailed reports on individual user activity and overall system performance to provide
actionable insights.

AstraFox | .NET Software Engineer | Warsaw, Poland | May 2022 – January 2024
C#, ASP.NET MVC, REST API, HTML, CSS, JavaScript, AJAX, jQuery, MS SQL, ADO.NET, Entity Framework
Developed software for automating specific workflows at gas stations.
• Designed database in MS SQL to manage user data, their access and operations.
• Created back-end and REST API on ASP.NET MVC, using SignalR for real-time user experience.
• Created UI from scratch with HTML and CSS, while using AJAX and jQuery UI elements.
SoftServe | .NET Software Engineer | Rivne, Ukraine | August 2020 – February 2022
C#, C++, MS SQL, ADO.NET, Entity Framework, LINQ, WPF, Windows Forms, Windows Services, JSON,
Regular Expressions, XML, CSV, NLog
Contributed to a large-scale medical project as part of a development team.
• Created a data conversion utility using .NET Framework and C# with a Windows Forms interface to
convert a proprietary string data format into XML, JSON, and CSV.
• Debugged early project modules written in C++ using Visual Studio Debugger, analyzing complex
component interactions.
• Enhanced database interaction methods by creating and optimizing stored procedures in MS SQL,
utilizing ADO.NET, Entity Framework, and LINQ.
• Automated Nightly Builds for the entire project by implementing a Windows Service that executed
build scripts, tracked results, generated detailed reports, notified users, and updated release files on
a remote server upon successful builds.

Projects

Contributed to a cargo logistics management system | June 2025
C#, Entity Framework, ASP.NET MVC, Knockout.js, jQuery, Bootstrap, MS SQL
• Unified Knockout.js data bindings for better performance in complex UI scenarios.
• Fixed jQuery-related issues and extended functionality with new interactive controls.
• Modified UI with Bootstrap-based design changes and custom control development.
• Updated database schema with new entities and managed corresponding EF6 migrations.
• Remade AJAX communication to reduce payload size and improve responsiveness.

Developed a "social network on a map" for musicians. | April 2021
PHP, MySQL, CodeIgniter, HTML, CSS, JavaScript, jQuery, Google Maps API, AJAX, JSON, SMM
• Conceptualized the entire website, from database to UI, using Google Maps API and CodeIgniter.
• Developed interactive map features for users to mark their location and connect with others.
• Attracted over 2000 (two thousand) users through social media marketing strategies.

Collaborated on a booking.com analog project. | January 2020
HTML, CSS, JavaScript, jQuery, Google Maps API, AJAX, JSON
• Designed the map interaction interface, working extensively with Google Maps API to integrate
mapping features into the platform.

Education

• STEP IT Academy | Rivne, Ukraine | June 2018 – August 2020

Certifications

• Foundational C# with Microsoft | freeCodeCamp | October 2024
• JavaScript Algorithms and Data Structures (Beta) | freeCodeCamp | September 2024

Languages

Ukrainian (Fluent) | English (B2) | Polish (A2)