Valerii Abakumov

Senior

Registration: 25.11.2025

Specialization: Full-Stack / Backend .NET Developer

— Senior Software Engineer with 12+ years building scalable backend and full-stack applications in C#, .NET Core, ASP.NET Core, and modern JavaScript frameworks (Angular, React, Vue). — Expert in microservices architecture, cloud solutions (Azure), containerization (Docker, Kubernetes), and CI/CD pipelines (Azure DevOps, GitLab). — Proven track record implementing TDD and automated testing (unit, integration, acceptance), migrating monoliths to microservices, and leveraging AI dev tools (GitHub Copilot with Claude Sonnet) to accelerate development. — Strong experience with SQL Server, PostgreSQL, EF Core, RabbitMQ, gRPC, and REST APIs.

Portfolio

Mobile Social Sharing App (In Development)

● Full-stack mobile application enabling photo and GPS coordinate sharing. ● Built with Node.js, TypeScript, PostgreSQL, MinIO, and deployed via Coolify on VPS. ● Developed using AI-assisted workflows (GitHub Copilot, Claude).

AI-Automated Telegram Art Channel

● Built automated content generation pipeline using Make.com, Perplexity API, OpenAI API, and Telegram Bot API. ● Reduced manual posting time by 85-90% while maintaining consistent engagement.

Postvibe.app - AI-Copilot for content creators

● AI-powered social media growth platform built with Node.js, TypeScript, PostgreSQL, and Cloudflare. ● Leveraging GitHub Copilot for accelerated development and feature implementation.

Skills

SQL

TypeScript

.NET Core

ASP.NET Core

EF Core

LINQ

PostgreSQL

MongoDB

React

Angular

Vue

Test-Driven Development

DDD

SOLID

CQRS

CQS

Microservices

Clean Architecture

Docker

Kubernetes

RabbitMQ

Grafana

ELK

Azure DevOps

GitHub

GitLab

Jira

Confluence

VS Code

GitHub Copilot

Claude Sonnet 4/4.5

GPT-5

Windsurf

xUnit

NUnit

MS Test

FluentAssertions

Automated Tests

Acceptance Testing

Integration Testing

Unit Testing

Work experience

Senior Full-stack Developer (C# .NET & Angular, B2B)

since 11.2024 - Till the present day |Eurofins

.NET Core, MS SQL Server, C#, Angular

● Developed and enhanced internal CRM system for multinational company. ● Designed and implemented new .NET Core services and Angular components. ● Managed builds, releases, and dev environments in Azure. ● Conducted code reviews and collaborated within distributed Scrum team. ● Leveraged AI devtool (GitHub Copilot) for tasks implementation and development acceleration. Side projects: 1. PostVibe.app (In Development). ● AI-powered social media growth platform built with Node.js, TypeScript, PostgreSQL, and Cloudflare. ● Leveraging GitHub Copilot for accelerated development and feature implementation. 2. Mobile Social Sharing App (In Development). ● Full-stack mobile application enabling photo and GPS coordinate sharing. ● Built with Node.js, TypeScript, PostgreSQL, MinIO, and deployed via Coolify on VPS. ● Developed using AI-assisted workflows (GitHub Copilot, Claude). 3. AI-Automated Telegram Art Channel. ● Built automated content generation pipeline using Make.com, Perplexity API, OpenAI API, and Telegram Bot API. ● Reduced manual posting time by 85-90% while maintaining consistent engagement. 4. Chernika App (Decommissioned). ● Personal finance management platform featuring microservices architecture with ASP.NET Core, PostgreSQL, and Docker containerization.

Senior Developer (C# .NET, B2B)

11.2022 - 11.2024 |SD Technologies

.NET 7, FluentValidation, xUnit, Jira, Confluence, GitLab CI/CD

● Developed cloud POS system used across multiple US states. ● Built and maintained microservices and monolithic modules in .NET 7. ● Improved system reliability by managing technical debt and resolving production incidents. ● Implemented unit and functional testing, FluentValidation, and xUnit. ● Collaborated via Jira/Confluence and managed releases in GitLab CI/CD.

Senior .NET Developer

06.2019 - 07.2022 |SibDigital

gRPC, RabbitMQ, TDD, CI/CD, CQRS, .NET Core

● Developed backend for 'Digital Repairs' and 'Digital Rounds' mobile applications used across 25 factories. ● Migrated backend from monolithic service to microservices with gRPC and RabbitMQ. ● Resolved memory leaks and optimized performance of distributed services. ● Advocated TDD and integrated automated tests into CI/CD pipelines. ● Improved architecture using CQRS and .NET Core built-in tools.

Head of .NET Department / .NET Resource Manager

07.2021 - 07.2022 |SibDigital

.NET

● Hired, onboarded, and managed mid/senior/lead developers. ● Created internal .NET code style guide and organized knowledge-sharing sessions. ● Grew department from 5 to 14 developers aligned with project expansion.

Full-stack Developer (.NET, React)

05.2017 - 06.2019 |Alfa-Bank

.NET Core, EF Core, SQL Server, React, Redux

● Built Commission Management System enabling tariff modifications. ● Designed backend with .NET Core, EF Core, and SQL Server; frontend with React/Redux. ● Introduced Jenkins CI pipelines and shared libraries for ~30 developers. ● Increased test coverage from 0% to ~45% through unit and integration testing. ● Delivered in-house training on .NET testing practices.

Full-stack Developer (.NET, ASP.NET MVC)

11.2014 - 05.2017 |LifeIT

.NET Framework, ASP.NET MVC, WPF, SOLID, Git

● Developed multiple customer solutions in .NET Framework, ASP.NET MVC, WPF, and Windows Forms. ● Implemented SOLID principles, CI, and Git version control.

C# .NET Developer

06.2013 - 11.2014 |Telekom Service IT

WinForms, WPF, Entity Framework, SQL Server

● Developed desktop and web applications with WinForms, WPF, Entity Framework, and SQL Server. ● Gained practical experience with source control and regex parsing.

Educational background

Automated Control Systems

Till 2013

Moscow State University of Civil Engineering

Languages

EnglishAdvancedRussianNative