Senior Backend Engineer & System Architect

Hi, I'm Viktors

I build high-performance, data-intensive backend systems in C#, .NET, and ASP.NET Core. With 17+ years of experience, I currently work with financial sector clients through my company SIA TelleNet Solutions, delivering backend engineering and architecture consultancy. If you need a senior engineer who ships reliable systems without the overhead of a full-time hire - let's talk.

What I deliver

My work is centered around ASP.NET Core, Entity Framework Core, SQL Server, and cloud-native infrastructure (Azure, Kubernetes, CI/CD). I have deep experience with large-scale data migrations, high-throughput ETL pipelines, and complex SQL - designing schemas, optimizing queries, and moving tens of millions of records with strong guarantees around data integrity. On a recent project, I led the migration of ~120M financial records across multiple interconnected systems with zero data loss, and cut batch processing time from ~8 hours to under 90 minutes through bulk operations, query rewrites, and index optimization.

Architecture & technical leadership

I spent nearly four years as a System Architect at If Insurance, where I designed the architecture for a Baltic-wide claims processing system and led the migration from ARM templates to Terraform across all Baltic teams. I care a lot about observability and reliability - structured logging, custom metrics, dashboards, and resilient patterns (retries, idempotency, bulk/batch processing) to keep systems stable in production. If your team needs someone who can own architecture decisions and raise the bar on code quality and review practices, that's where I thrive.

Beyond code

When I'm not shipping features or spending time with my family, I'm usually learning - exploring finance and entrepreneurship and applying those lessons to how I build and run software projects.

Products I've built

I love turning ideas into working products. I built AdSnap, a classifieds aggregator platform with multi-source data ingestion, search, and filtering, and Listing Compliance Shield, a tool that automatically checks Etsy listings against platform policies and flags violations before they cause issues.

On the blog

I share hard-won lessons from real projects - the wins, the mistakes, and what I'd do differently next time. If it helps another developer dodge a pitfall or save a few hours, that's a win.

Available for contract work

Looking for a senior backend engineer or system architect for your next project? I work on a B2B contract basis through SIA TelleNet Solutions and am currently open for new engagements. Reach out through the contact form - let's discuss how I can help.