Looking for a job

Demid Petrov

@demidpetrov

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Backend .NET developer reworking .NET Framework and .NET Core systems to ship faster features.

Slovakia

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What I'm looking for

I’m looking for a role where I can own backend features in .NET, optimize performance in SQL and APIs, and keep improving development practices with solid testing and release workflows.

I build backend services with C#, .NET Framework, and .NET Core, with a recent focus on .NET Core work at First Line Software in Bratislava.

At First Line Software, I optimized a legacy PDF generation pipeline with parallel processing, JWT handling, retry logic, and timeout controls—pushing batch throughput from ~100 to 2,000+ PDFs per run.

On the platform side, I’ve worked on LINQ-to-Entities query optimization for high-volume datasets, reducing execution time by an average of 70%, and helped migrate FedEx and uProduce integrations from legacy SOAP to REST APIs.

As a .NET technical lead, I standardized the team’s Git branching using Git Flow, improved testing practices, and drove adoption of AI-assisted development tools (Codex, Claude Code), alongside Microsoft SQL Server and ongoing app support and reviews across multiple products.

Experience

Work history, roles, and key accomplishments

Current

C# Software Technical Lead

Current

First Line Software

Nov 2025 - Present (9 months)

Standardized the team's Git branching strategy by introducing Git Flow, resulting in a more predictable development and release process.
Defined and improved testing practices, increasing process transparency and raising overall quality standards.
Drove the adoption of AI-assisted development tools (Codex, Claude Code), improving developer productivity and accelerating feature delivery.

.NET Framework .NET Core Hangfire Entity Framework SQL Microsoft SQL Server LINQ REST APIs ASP.NET MVC Webhooks SSO AWS S3 RDS IIS Git Postman Jira Atlassian

Software Engineer

First Line Software

May 2021 - Oct 2025 (4 years 5 months)

Optimized a legacy PDF generation pipeline by introducing parallel processing, retry logic, and timeout handling, increasing batch throughput by over 20×.
Optimized LINQ-to-Entities queries for high-volume datasets, reducing query execution time by an average of 70%.
Migrated FedEx and uProduce integrations from legacy SOAP to REST APIs, improving maintainability and system performance.

.NET Framework .NET Core Hangfire Entity Framework SQL Microsoft SQL Server LINQ REST APIs ASP.NET MVC Webhooks SSO AWS S3 RDS IIS Git Postman Jira Atlassian

Education

Degrees, certifications, and relevant coursework

ITMO University

Master of Science, Laser Technologies

2019 - 2022

Activities and societies: Mathematical Modeling, Computer Simulation, Data Processing and Analysis, Laser Physics, Photonics, Optical Engineering, Experimental Research Methods

Master Degree in Laser Technologies from ITMO University from 2019 to 2022.