Software Engineer C#

Justin Theyskens

New York

+1-631-***-**** ******************@*****.*** www.linkedin.com/in/justin-theyskens-63bb4b316 https://github.com/justinTheyskens/

PROFESSIONAL SUMMARY

Recent graduate and freelance Backend Software Engineer skilled in Java, C#, and Python. Experienced in designing and optimizing server infrastructure for online multiplayer games, contributing to a successful independent game. Proven ability to lead initiatives that enhance server stability and streamline development workflows. Eager to leverage technical skills and collaborative experience to contribute to backend engineering projects.

SKILLS

• Languages: Java, Visual Basic, C#, Python, SQL, Batch, PowerShell, HTML, CSS, JavaS

• Frameworks & Tools: .Net, Spring, Git, ASP.NET, Entity Framework Core, Spring Boot, Node.js, Azure, Docker, REST APIs, Amazon Web Services (AWS)

• Technical Skills: Unix, DevOps, System design & architecture, Software Testing, Debugging, Agile Methodology, DevOps, Software Development Life Cycle, Test Driven Development

• Miscellaneous: Microsoft Office Suite (Word, Excel, PowerPoint, etc.), Proficiency in all major operating systems EDUCATION

SUNY Stony Brook May 2024

Bachelor of Science, Technology Systems Management, Computer Science Stony Brook, New York

• Achievements: Dean's List, Fall 2017- Spring 2018

• Coursework: Video Game Design, Network Administration, Scripting Languages WORK HISTORY

Self-Employed Dec 2024 - Present

Freelance Software Engineer

• Designed and developed multiple full-stack web applications for various clients, utilizing both the .NET and Java ecosystems.

• Built RESTful APIs and dynamic backend systems using ASP.NET Core with Entity Framework Core, and Spring Boot with Maven, following best practices for modularity, security, and performance.

• Implemented responsive front-end interfaces using modern frameworks and ensured seamless integration with backend services.

• Managed all phases of the development lifecycle independently, including requirements gathering, database design, testing, deploy- ment, and post-launch maintenance.

• Collaborated closely with stakeholders to deliver tailored software solutions, emphasizing clean architecture and maintainability. Self-Employed Mar 2021 - Present

Freelance Game Developer New York

• Designed and implemented original game mechanics for a massively multiplayer online game (MMO), contributing to features that have since been adopted by a passionate player-run server community.

• Created standalone scripts with detailed documentation, enabling easy integration across a variety of independently operated servers.

• Collaborated with a small team to conceptualize and deliver unique server features, taking the lead on development and successful deployment.

• Managed a shared Git repository to coordinate development efforts, streamline version control, and ensure consistent progress across contributors.

• Built internal tools to support post-launch player management, improve server stability, and enhance administrative control. Projects

Healthcare Translation Web App with Generative AI Mar 2025

• A .NET web-based prototype that enables real-time, multilingual translation between patients and healthcare providers. This application converts text or spoken input into text, provides a transcript, and offers a translated version with audio playback. Hosted on AWS.

• Leverages generative AI (OpenAI) for translation assistance, integrates an external speech recognition API (Google Speech-to-Text). Social Media Application with .NET Dec 2024

• A .NET full-stack application using C#, ASP.NET, and Entity Framework Core for the backend API, with JavaScript and React powering the frontend. Hosted on Azure.

• The Application can take images an external API and save them in its own database. Workout Tracker Web App with Java Mar 2025

• A Java-based web application designed to help users track their workouts and runs efficiently. Leveraging Spring MVC and Spring Boot for a robust backend, the app stores user data securely in a relational database. Hosted on AWS.

• Allows users to log workout details, including weight, sets, and reps, while tracking running sessions with distance, time, and location.

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