Libraries I build and maintain — published on NuGet, each with a live interactive demo.

Data fetching, mutation and caching primitives for Blazor — WebAssembly and Server. Queries, mutations and a shared keyed cache in idiomatic C#, in the spirit of React Query. Extracted from a production Blazor application. Zero third-party dependencies, targets .NET 8 / 9 / 10.

A lightweight, dependency-free toast notification library for Blazor — WebAssembly and Server. Loading toasts with determinate progress, action buttons, six stacking positions with boundary anchoring, full CSS-variable theming and accessibility built in. Targets .NET 8 / 9 / 10.

Production systems I've engineered with major companies — the source lives in private repositories, so here is what they are rather than the code itself.

Full-Stack Developer on an enterprise project- and resource-management platform. .NET · Blazor · EF Core · MsSQL · Redis · Azure · WebSocket

• Modular Blazor solution on the latest .NET, owning features end to end from EF Core schema and migrations through API layer to UI
• Refactored legacy API controllers into lean services — average latency cut from 8 s to 0.85 s
• Query and indexing work on large MsSQL hierarchies, with Redis caching and WebSocket push for live collaborative updates
• Redesigned complex UI workflows for large hierarchical datasets; 95% frontend unit test coverage
• Azure deployments and GitLab CI pipelines, with SonarQube quality gates enforced on every merge

JavaScript Engineer on BMW Group's high-traffic e-commerce storefront and CMS applications. Express.js · TypeScript · PostgreSQL · Vue.js · Storybook · Tailwind

• Custom Node.js / Express services and server-side rendering APIs — page load performance +35%
• Modelled and queried PostgreSQL for catalog and content data behind the storefront and CMS
• Integrated internal BMW Group APIs and third-party services, with caching and resilience around slow upstreams
• Built a private, reusable UI component library adopted across multiple front-end applications

Full-Stack Developer on a large-scale e-commerce platform. NestJS · TypeScript · PostgreSQL · Prisma · Vue.js · Nuxt · .NET

• Developed and maintained 20+ NestJS micro-services and Vue/Nuxt micro-frontends at 99.9% availability
• Designed Prisma / PostgreSQL schemas and migrations, plus the message-driven contracts services use to talk to each other
• Domain-driven backend restructuring — duplicated logic −40%, shared npm libraries for linting, security and common components across teams
• Bridged .NET back-office systems with the Node platform, keeping data consistent across both

Full-Stack Developer on a real-time trading platform for the US market. React · Next.js · TypeScript · FastAPI · PostgreSQL · WebSocket · Playwright

• FastAPI backend integrating external trading & payment providers, 100% unit and E2E test coverage
• WebSocket pipeline streaming market data from ingest through to the browser
• PostgreSQL schema design for orders, positions and account history, with auth and payment flows built end to end
• Real-time trading dashboard — live charting, live chat, virtualized market tables

Earlier: Front-End Developer at Kutia LLC and UNE LLC (Prishtina, Kosova), 2019 – 2022.