# Nikolay Kashev Nikolay Kashev is a remote worker on Himalayas, Senior Full Stack Engineer at Worldline, based in Bulgaria. Source: https://himalayas.app/@nikolaykashev ```text Senior Full Stack Engineer at Worldline, architecting payment services and a React dashboard for merchant settlement investigations. ``` | Detail | Value | | --- | --- | | Availability | Looking for a job | | Location | Bulgaria | | Authorized to work in | Bulgaria | | Salary expectations | 55k+ EUR | | Job categories | Full Stack Engineer, Software Engineer, Software Developer | | Skills | C#, .NET, ASP.NET Core, React, JavaScript, TypeScript, REST APIs, API Architecture, SQL Server, Entity Framework Core, ASP.NET MVC, ASP.Net Web API, .NET Framework, Entity Framework, LINQ | | LinkedIn | https://linkedin.com/in/nikolay-kashev | ## About ```text At Worldline, I architect C# and ASP.NET Core services for merchant settlement investigations, separating high-volume transaction queries from time-sensitive payment workflows. I also consolidated exception queues, transaction histories, and audit details into a React and TypeScript dashboard. At Energize Software Services, I delivered a configurable business intake application that replaced spreadsheet-driven approvals with traceable workflows. I developed metadata-driven React forms to support customer-specific approval rules and established CI pipelines with automated checks. Earlier, at Nokia, I designed services to reconcile network inventory with provisioning records and helped extract provisioning functionality from a legacy .NET Framework application. At Vodafone, I developed features for a subscriber self-service portal, and at SQA Service LTD, I created a utility that consolidated regression results for QA teams. ``` ## Experience ### Senior Full Stack Engineer (current) [Worldline](https://himalayas.app/companies/worldline). Jan 2025 - Present ```text Architected C# and ASP.NET Core services for merchant settlement investigations, improving operational reliability. Built React and TypeScript dashboards and RESTful APIs, and introduced Azure Service Bus and Redis caching for long-running tasks. ``` Skills: C#, ASP.NET-Core, React, TypeScript, Entity-Framework-Core, SQL-Server, Azure-Service-Bus, Redis, OAuth, OpenID-Connect, GitHub-Co-Pilot, Cursor, OpenTelemetry, Application-Insights, xUnit ### Full Stack Software Engineer Energize Software Services. Jan 2025 - Oct 2026 ```text Delivered a configurable business intake application using C#, ASP.NET Core, and React, replacing spreadsheet-driven approvals with traceable workflows. Integrated external services and established CI/CD pipelines with GitHub Actions. ``` Skills: C#, ASP.NET-Core, React, TypeScript, React-Hook-Form, GitHub-Actions, xUnit, Playwright, PostgreSQL, MongoDB, OpenAPI ### Software Engineer [Nokia](https://himalayas.app/companies/nokia). May 2021 - Dec 2024 ```text Designed C# services to reconcile network inventory with provisioning records, and implemented ASP.NET Core REST endpoints. Tuned SQL Server queries and verified RabbitMQ consumer behavior. ``` Skills: C#, ASP.NET-Core, SQL-Server, RabbitMQ, Docker, Azure-DevOps, Grafana ### Software Developer [Vodafone](https://himalayas.app/companies/vodafone). Jan 2018 - Apr 2021 ```text Developed C# and ASP.NET MVC features for a subscriber self-service portal, including account management and billing history. Strengthened session management and authorization, and expanded NUnit test coverage. ``` Skills: C#, ASP.NET-MVC, ASP.Net-Web-API, JavaScript, NUnit, Azure-DevOps, HTML, CSS, Bootstrap ### Software Developer SQA Service LTD. Aug 2015 - Jun 2018 ```text Created a C# and .NET Framework utility for consolidating regression results, and automated browser checks with Selenium WebDriver and NUnit. Maintained SQL Server tables and stored procedures for test reporting. ``` Skills: C#, .NET-Framework, Selenium-Webdriver, NUnit, SQL-Server, JavaScript, jQuery ### QA Tester Reed Inc. Feb 2011 - Sep 2011 ```text Tested internal web applications, focusing on functionality and user workflows. Identified and logged defects, and created simple automated UI tests using Selenium IDE. ``` Skills: Selenium-IDE, Test-Case-Management, Defect-Tracking, Excel ## Education ### University of Plovdiv Paisii Hilendarski Bachelor's, Computer Engineering Technologies. 2011 - 2015 ```text Bachelor's degree in Computer Engineering Technologies from the University of Plovdiv Paisii Hilendarski, completed in 2015. ``` ### Software University (SoftUni) Associate, Software Engineering. 2006 - 2011 ```text Associate degree in Software Engineering from Software University (SoftUni), completed in 2011. ``` ## Tech stack - Postman - OpenAPI - GitHub - ESLint - SonarQube - Kubernetes - Jenkins - GitHub Actions - Sass - PostgreSQL - MongoDB - .NET - ASP.NET Core - Bootstrap - Redis - Terraform - Azure DevOps - Jest - Cypress - React - jQuery - axios - Webpack - JavaScript - HTML5 - C# - Serilog - RabbitMQ - Azure Service Bus - MediatR - Grafana - OpenTelemetry - SignalR - Azure Functions - Azure SQL Database - TypeScript - React Testing Library - Git - Docker - SQL - npm - Azure Blob Storage - React Router - Playwright - TanStack Query - Cursor - Vite - GitHub Copilot - React Hook Form - Claude Code - Redux Toolkit - ASP.NET MVC - Selenium WebDriver - Entity Framework Core - Dapper - REST APIs To contact Nikolay, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire). ## People also viewed - [Pavel Kanev](https://himalayas.app/@pavelkanev): Senior Software Engineer, Intway - [David Wyler](https://himalayas.app/@davidwyler): Lead Full Stack Engineer, AT&T - [Kosta Hristov](https://himalayas.app/@kostahristov): Technical Director & Software Architect, Qgp Limited - [Lyubomir Polyanov](https://himalayas.app/@lyubomirpolyanov): Software Technical Lead, Concord EU - [Gjorgi Krstevski](https://himalayas.app/@gjorgikrstevski): Senior Backend .NET Engineer, Endava - [Bojidar Yovchev](https://himalayas.app/@bojidaryovchev): Software Architect & Full Stack Engineer, Freelance - [Angel Stamatov](https://himalayas.app/@angelstamatov): Software Engineer, Data Solutions Ltd - [Rami Amaire](https://himalayas.app/@ramiamaire): Senior Full Stack Developer, Q.Agency - [Boyan Tomov](https://himalayas.app/@boyantomov): Lead Full Stack Developer, Freelance - [Nikolay Georgiev](https://himalayas.app/@nikolaygeorgiev1): Senior Full Stack Developer, Sourcelab Ltd.