Vladyslav Semenko
@vladyslavsemenko
Senior .NET engineer building scalable SaaS and production backends for finance and data.
PolandWhat I'm looking for
I’m a Senior .NET Engineer with 8+ years of experience building scalable backend systems and SaaS products in finance, analytics, and data-driven domains. I focus on performance, reliability, and business value using ASP.NET Core, Clean Architecture, and Domain-Driven Design.
Currently, I’m the Founder / Solo Developer of CodeCost, where I own the full product lifecycle—from architecture to monetization. I designed an end-to-end .NET 8 SaaS platform, built async background processing with real-time progress updates, and implemented code metrics (LOC, complexity, change frequency, bug-risk) with a feature-gated subscription model.
Previously, I’ve delivered production systems and full-stack products, including backend work for high-traffic banking services (500,000+ active users, 99.99% uptime) and data-driven applications with Blazor and Mapbox. Across roles, I’ve strengthened API design, refactoring, security (OAuth2/JWT), testing discipline (xUnit/NUnit/TDD), and performance tuning (including SQL optimization) to ship reliable releases.
Experience
Work history, roles, and key accomplishments
Founder / Solo Developer
CodeCost
Jan 2026 - Present (5 months)
Designed and built CodeCost, an end-to-end .NET 8 SaaS platform for code-debt and cost analysis, delivering real-time repository analysis pipelines and reporting dashboards. Implemented subscription gating with GitHub OAuth authentication and Stripe-ready billing infrastructure, owning architecture through deployment readiness.
Education
Degrees, certifications, and relevant coursework
PSTU, Mariupol Faculty of Information Technologies
Master's Degree with Honors, Computer Science
2017 - 2018
Completed a Master's Degree with Honors at PSTU in Mariupol from 2017 to 2018.
PSTU, Mariupol Faculty of Information Technologies
Bachelor's Degree in Computer Science, Computer Science
2013 - 2017
Earned a Bachelor's Degree in Computer Science at PSTU in Mariupol from 2013 to 2017.
Tech stack
Software and tools used professionally
Availability
Location
PolandAuthorized to work in
Job categories
Skills
Interested in hiring Vladyslav?
You can contact Vladyslav and 90k+ other talented remote workers on Himalayas.
Message VladyslavFind your dream job
Sign up now and join over 250,000+ remote workers who receive personalized job alerts, curated job matches, and more for free!
