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Senior C#/.NET backend engineer with 11+ years of experience building and operating production systems across ASP.NET Core APIs, microservices, event-driven workloads, and Azure distributed architectures. I own work end-to-end—from discovery and design to implementation, testing, deployment, monitoring, and production support. I’m comfortable in regulated, transactional domains (payments, accounting, tax reporting, document workflows) and I focus on reliability, observability, and maintainable delivery. I collaborate closely with product, frontend, QA, DevOps, and implementation teams to ship features that work in the real world.…Senior C#/.NET backend engineer with 11+ years of experience building and operating production systems across ASP.NET Core APIs, microservices, event-driven workloads, and Azure distributed architectures. I own work end-to-end—from discovery and design to implementation, testing, deployment, monitoring, and production support. I’m comfortable in regulated, transactional domains (payments, accounting, tax reporting, document workflows) and I focus on reliability, observability, and maintainable delivery. I collaborate closely with product, frontend, QA, DevOps, and implementation teams to ship features that work in the real world.

Konstantin Budrin

Software Engineer, Back-End Developer, Developer, +2

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Senior C#/.NET backend engineer with 11+ years of experience building and operating production systems across ASP.NET Core APIs, microservices, event-driven workloads, and Azure distributed architectures. I own work end-to-end—from discovery and design to implementation, testing, deployment, monitoring, and production support. I’m comfortable in regulated, transactional domains (payments, accounting, tax reporting, document workflows) and I focus on reliability, observability, and maintainable delivery. I collaborate closely with product, frontend, QA, DevOps, and implementation teams to ship features that work in the real world.…Senior C#/.NET backend engineer with 11+ years of experience building and operating production systems across ASP.NET Core APIs, microservices, event-driven workloads, and Azure distributed architectures. I own work end-to-end—from discovery and design to implementation, testing, deployment, monitoring, and production support. I’m comfortable in regulated, transactional domains (payments, accounting, tax reporting, document workflows) and I focus on reliability, observability, and maintainable delivery. I collaborate closely with product, frontend, QA, DevOps, and implementation teams to ship features that work in the real world.

Available to hire

Senior C#/.NET backend engineer with 11+ years of experience building and operating production systems across ASP.NET Core APIs, microservices, event-driven workloads, and Azure distributed architectures. I own work end-to-end—from discovery and design to implementation, testing, deployment, monitoring, and production support.

I’m comfortable in regulated, transactional domains (payments, accounting, tax reporting, document workflows) and I focus on reliability, observability, and maintainable delivery. I collaborate closely with product, frontend, QA, DevOps, and implementation teams to ship features that work in the real world.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Fluent

Russian

Fluent

Work Experience

Founder & Principal Engineer (part-time) at BudrinLabs

January 1, 2025 - Present

Independent cross-platform commercial software and research tooling; owns product discovery, architecture, implementation, profiling, testing, packaging, releases, documentation, maintenance, and user feedback across low-latency desktop and Android software. Builds and validates performance-sensitive systems using disciplined profiling, concurrency checks, device testing, automated builds, and release acceptance.

Senior Engineer at Lembitech (for Nextlane)

January 1, 2025 - January 1, 2026

Designed and delivered .NET 8 backend services and REST APIs for synchronising inventory, pricing, sales, and operational data across heterogeneous dealer management systems. Built asynchronous, event-driven workflows using Azure Functions and Azure Service Bus with Cosmos DB persistence, including retries, idempotency, explicit failure handling, and operational safeguards. Owned features from technical discovery and service/data-contract design through implementation, automated testing, deployment, observability, documentation, and production support. Investigated distributed production incidents across APIs, messaging, transformations, and persistence; improved traceability and reliability using Application Insights.

Senior Engineer at Kofax Montenegro

January 1, 2023 - January 1, 2025

Built and maintained production .NET Core and Python APIs and processing services for document ingestion, OCR post-processing, NLP-assisted extraction, classification, validation, and structured-data transformation. Designed REST integrations and configurable processing pipelines with PostgreSQL persistence and asynchronous routing to connect AI-assisted processing with enterprise workflow/document-management systems. Diagnosed defects and performance bottlenecks across HTTP APIs, SQL queries, data transformations, OCR/NLP components, and third-party integrations; improved reliability, testability, and maintainability.

Lead / Senior .NET Engineer at Kontur

January 1, 2022 - January 1, 2023

Led a two-engineer workstream delivering a greenfield algorithmic content-variation service; owned architecture, data model, implementation, testing, release, and production reliability. Designed distributed .NET Core services and REST APIs for accounting, reporting, document processing, and integrations between business-critical internal and customer-facing systems. Optimised PostgreSQL access, resolved production defects, and improved performance, testability, observability, and maintainability while coordinating with product, frontend, QA, and operations in a regulated environment.

Software Engineer at EPAM Anywhere

January 1, 2020 - January 1, 2021

Modernised legacy enterprise components (Windows/legacy C++/MFC) toward cloud-oriented services and integration APIs. Led migration/modernisation of legacy C++/MFC into maintainable .NET 6 services while preserving critical behaviour, performance characteristics, and integration contracts. Built API-first services and REST interfaces, delivered incremental migration paths, and implemented automated delivery using GitHub Actions and AWS CodePipeline.

Software Engineer at FastDev

January 1, 2019 - January 1, 2020

Built Azure-hosted .NET Core microservices and backend APIs deployed through Docker and Kubernetes, contributing to service decomposition and platform consistency. Implemented CI/CD with Azure DevOps and configured logs, metrics, dashboards, diagnostics, and alerts using Azure Monitor and Application Insights.

Lead Software Engineer at Repast

January 1, 2018 - January 1, 2019

Designed and built a six-service production system from scratch and led five engineers and analysts to deliver the first release within six months.

Software Engineer / Backend .NET Developer at Net Element

January 1, 2017 - January 1, 2019

Developed payment-processing and transaction-workflow systems with operational tooling and external integrations. Implemented payment-processing APIs and SQL Server-backed business workflows, including validation, error handling, operational diagnostics, and production support. Delivered a third-party certification-centre integration and worked across transactional backend behaviour, data consistency, external contracts, and customer-facing operational requirements.

Software Engineer at Exadel

January 1, 2016 - January 1, 2017

Delivered .NET backend and web features, REST integrations, defect fixes, and customer-specific enterprise functionality.

Web Programmer at Titanic Cinema

January 1, 2015 - January 1, 2016

Supported internal services, built administration tools, and integrated external ticketing platforms.