07/23/2026 updated
100 % available
Senior .NET Backend Developer - Legacy Modernization & Data Engineering
Granada, Spain
Only remote
Engineer's degree (MSc-equivalent), Computer Engineering — Ural State Technical University, 2004About me
Senior .NET / backend engineer, 15+ years. Data layer expert: SQL Server, PostgreSQL/PostGIS, ETL, replication. I move legacy systems onto a modern stack with zero downtime. Recent: AWS services for Scania; real-estate platform (Web API + Vue.js). Remote, EU work authorization (based in Spain).
ASP.NET.NET FrameworkAmazon Web ServicesC Sharp (Programming Language)Extract Transform Load (ETL)Database DevelopmentEntity FrameworkPostgreSQLMicrosoft SQL ServersPostGISTransact-SQLAsp.net Web ApiBackendBackend ProgrammingApache Kafka
.NET Backend Development
Over 15 years of commercial experience in .NET backend development using C#, .NET 10 / .NET Framework, ASP.NET Web API, Entity Framework, Dapper, and TDD. Specialization in modernizing legacy systems including VB6, Classic ASP, WebForms, and WinForms to modern .NET without business downtime.
SQL Server & Database Engineering
Deep expertise in MS SQL Server including T-SQL, performance tuning, schema redesign, indexing, stored procedures, transaction isolation levels, and replication. Additional experience with PostgreSQL, PostGIS, SSAS, OLAP, ETL, and data warehouse design.
Cloud & Event Streaming
Hands-on experience developing and scaling services on AWS and implementing event streaming with Apache Kafka. Tooling experience includes Git, Swagger, Postman, and AI-assisted development with Claude and GitHub Copilot.
Legacy System Modernization
Proven track record of incrementally migrating live production systems from legacy stacks (VB6, Classic ASP, WinForms, WPF) to modern .NET with zero production downtime, maintaining continuous service availability throughout the migration process.
Third-Party API & Integration Development
Experience building integrations with external platforms such as Zoopla, Rightmove (REST APIs, webhooks), Gmail API, and SendGrid, including automated validation and bulk email delivery with SPF/DKIM/DMARC domain authentication.
Geospatial Data Engineering
Design and implementation of PostgreSQL + PostGIS architectures for large-scale geospatial data (~0.5 TB), covering ingestion, loading, and synchronization with data warehouses.
Frontend (Working Knowledge)
Working knowledge of frontend technologies including Vue.js, JavaScript, and Bootstrap, applied in full-stack development contexts.
Data Warehouse & Analytics
Design and implementation of data warehouses using Microsoft SSAS for company-wide management analytics, including deep query and index tuning to achieve significant speedups in transactional data processing.
Hardware Integration & Payment Systems
End-to-end development of self-service payment terminal platforms including hardware integration with card acquiring, cash acceptors, fiscal printing, and USB protection dongles using C#, WPF, ASP.NET Web API, and MySQL.
Over 15 years of commercial experience in .NET backend development using C#, .NET 10 / .NET Framework, ASP.NET Web API, Entity Framework, Dapper, and TDD. Specialization in modernizing legacy systems including VB6, Classic ASP, WebForms, and WinForms to modern .NET without business downtime.
SQL Server & Database Engineering
Deep expertise in MS SQL Server including T-SQL, performance tuning, schema redesign, indexing, stored procedures, transaction isolation levels, and replication. Additional experience with PostgreSQL, PostGIS, SSAS, OLAP, ETL, and data warehouse design.
Cloud & Event Streaming
Hands-on experience developing and scaling services on AWS and implementing event streaming with Apache Kafka. Tooling experience includes Git, Swagger, Postman, and AI-assisted development with Claude and GitHub Copilot.
Legacy System Modernization
Proven track record of incrementally migrating live production systems from legacy stacks (VB6, Classic ASP, WinForms, WPF) to modern .NET with zero production downtime, maintaining continuous service availability throughout the migration process.
Third-Party API & Integration Development
Experience building integrations with external platforms such as Zoopla, Rightmove (REST APIs, webhooks), Gmail API, and SendGrid, including automated validation and bulk email delivery with SPF/DKIM/DMARC domain authentication.
Geospatial Data Engineering
Design and implementation of PostgreSQL + PostGIS architectures for large-scale geospatial data (~0.5 TB), covering ingestion, loading, and synchronization with data warehouses.
Frontend (Working Knowledge)
Working knowledge of frontend technologies including Vue.js, JavaScript, and Bootstrap, applied in full-stack development contexts.
Data Warehouse & Analytics
Design and implementation of data warehouses using Microsoft SSAS for company-wide management analytics, including deep query and index tuning to achieve significant speedups in transactional data processing.
Hardware Integration & Payment Systems
End-to-end development of self-service payment terminal platforms including hardware integration with card acquiring, cash acceptors, fiscal printing, and USB protection dongles using C#, WPF, ASP.NET Web API, and MySQL.
Languages
EnglishFluentRussianNative speaker
Project history
Remote position working on a real-estate agency platform for the UK market. Incrementally migrated a live legacy system to ASP.NET Web API + Vue.js with zero production downtime. Built integrations with UK property aggregators Zoopla and Rightmove (REST APIs, webhooks). Integrated Gmail API and SendGrid for bulk email (~95K emails/month) with 99%+ delivery rate. Optimized MS SQL Server under production load. Designed a PostgreSQL + PostGIS architecture for ~0.5 TB of geospatial data.
Swedish IT services company based in Stockholm HQ. Embedded in the outstaff team of automaker Scania in a distributed international team of 9. Developed and scaled services on AWS with event streaming via Apache Kafka. Maintained business-critical legacy systems (VB6, Classic ASP, WinForms, WPF) and drove their stepwise migration to .NET Core.
Retail franchise network. Built a self-service payment terminal platform end to end and rolled it out to production across 20+ terminals in 4 cities using C#, WPF, ASP.NET Web API, MySQL, with hardware integration including card acquiring, cash acceptor, fiscal printing, and USB protection dongles.