Backend and 3D web development · Moscow
I build the services behind business applications in Go, Java/Kotlin and .NET, and the interactive 3D views that sit on top of them: system maps, digital twins, operations dashboards and product configurators.
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Live 3D view of the services behind an online payment flow. Hover a service to see its request rate, latency and error rate. Rendered with three.js WebGPURenderer.
Working 3D views of the kind used in operations, logistics and commerce software. They run live on this page with the three.js WebGPURenderer and shaders written in TSL, and fall back to WebGL 2 where WebGPU is not available. All figures are sample data.
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Hover a rack · drag to rotate
Fixed-scope projects for companies and teams. Each engagement ends with source code you own, documentation and a deployment that runs.
REST and gRPC services designed around your domain, with a relational schema, authentication and tests.
Go · Java / Kotlin (Spring) · ASP.NET Core · PostgreSQL
Interactive views of real systems and products, connected to your data and usable in a normal browser without plugins.
three.js · WebGPU / WebGL 2 · TSL
Internal tools, admin panels and shops: the interface, the API behind it and the database, delivered as one working product.
ASP.NET Core MVC · Vue · PostgreSQL
Scripts and services that collect data from websites, process files or connect two systems on a schedule.
Python · Docker
Public repositories from my GitHub account, chosen for the patterns that matter in business backends: layered architecture, validation, API documentation, containerised deployment.
| Repository | What it is | Patterns and stack |
|---|---|---|
| FileService | File storage REST service. Files are kept on disk, their metadata in a database; uploads are validated and errors are returned in a uniform format. | Java · Clean architecture (API / Core / Infrastructure) · CQRS commands and queries with validators · Swagger · Docker Compose |
| Gtracker | Goal and task tracking API with sign-up, login and list filtering, built for a team-development course. | Go · HTTP handlers with DTO validation and unit tests · Swagger docs · Docker Compose · GitLab CI |
| PieShop and PieShopAdmin | Online shop with a separate administration application for products, categories and orders. | C# · ASP.NET Core MVC · Entity Framework migrations · Repository pattern · PostgreSQL · Docker |
| TBank-FinTech | Assignments from the T-Bank “Fintech: Java development” course, including message-queue benchmarks run under Docker Compose. | Kotlin / Java · Gradle · Message queues · Docker Compose · GitHub Actions |
| bank-api | Banking API with accounts, ledger entries and money transfers, built while following the Go Backend Master Class. | Go · PostgreSQL transactions · Makefile workflow · Docker Compose |
| ak-karimzai.github.io | This page: the service map, warehouse twin, dashboard and configurator, the WebGPU-to-WebGL fallback and the enquiry form. | JavaScript · three.js WebGPURenderer · TSL · Vite · GitHub Pages |
You describe what you need. A few paragraphs are enough; I will ask about the rest.
I reply with questions, then a written scope with a fixed price and a timeline before any work starts.
You follow progress in a repository and on a preview link, and review each milestone.
You receive the source code, setup documentation and help with deployment to your infrastructure.