Андрій

TONTS ANDREY
FULL-STACK DEVELOPER

PROFILE
Full-stack / Backend Developer with over one year of hands-on experience in the .NET (ASP.NET Core)
and React/TypeScript ecosystems. I specialize in designing high-performance server systems and scalable
web APIs. I have practical experience optimizing data access using Entity Framework Core and setting up
distributed caching via Redis. I am proficient in the principles of Clean Architecture, DDD, and CQRS.
Familiar with cloud-based architectures on AWS. I use SignalR to implement real-time functionality and
RabbitMQ to build event-driven systems. I actively utilize AI-enabled tools to improve performance and
ensure high code quality.

TECH SKILLS
C#, .NET 9 Clean Architecture, DDD, CQRS, Git, GitHub
ASP.NET Core (Web API, MVC), REST API LINQ, AutoMapper, SignalR,
Entity Framework Core OOP, SOLID JWT/OAuth2
MS SQL, PostgreSQL, Redis AWS (API Gateway, Lambda, React, TS, JS, Tailwind,
RabbitMQ (MassTransit) SQS, CloudWatch, EC2, ECS, S3, HTML, CSS
Testing & QA: xUnit, Moq SNS) Jira , Agile\Scrum

WORK EXPERIENCE
Backend / Full-Stack .NET Developer January 2025 – Present
Contributed to the development of a modular backend system using ASP.NET Core, ensuring high
performance and scalability.
Implemented Clean Architecture and CQRS patterns to achieve strict separation of concerns and
simplify long-term code maintenance.
Developed and maintained a suite of unit tests using xUnit and Moq to ensure the reliability of
business logic in a CQRS-based system.
Collaborated on designing real-time features using SignalR, including synchronized data editing and
session-based communication for end-users.
Optimized the data access layer using Entity Framework Core, implementing efficient queries and
tracking strategies to reduce database load.
Integrated RabbitMQ for asynchronous message processing, allowing the system to handle background
tasks without blocking the main API thread.
Extended distributed caching strategies with Redis, significantly improving application response times
for frequently accessed data.
Developed and supported the frontend using React and TypeScript, ensuring seamless integration with
backend APIs and a responsive user interface.

EDUCATION
Odesa Polytechnic National University - Bachelor of Computer Science 2022-2026

ADDITIONAL INFORMATION
Languages: Ukrainian - Fluent , English - B1.

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