My primary language: custom MVC frameworks, high-load SaaS systems and dozens of projects running in production.

Large applications with type safety: Next.js products, an SSH-2 implementation from scratch and Node.js services.

My choice for network programming: an SMTP/IMAP mail server from scratch, a VPN control plane, WebSocket gateways.

Where performance is critical: an FTP/FTPS server on tokio, Tauri desktop apps and system utilities.

Data work and ML: FastAPI services, pandas reporting, LSTM forecasting models and automation scripts.

The native language of the web: from vanilla to frameworks, including animations, canvas and browser APIs.

Real-time servers, WebSocket gateways, APIs and CLI tools — I know every corner of the event loop.

Live systems: messaging platforms, real-time dashboards, GPS tracking and ICU monitoring.

Payment systems integration: Stripe, Skrill, Epoint and more — hosted checkout, webhooks, subscriptions and refunds.

AI engineering: LLM integrations, agent systems, MCP servers, RAG pipelines and automated workflows.

SSR, App Router, server components — dozens of production apps from CRMs to SaaS dashboards.

Design systems, dark/light themes and fully responsive interfaces — fast and consistent with utility-first.

Indexing, partitioning and query optimization experience on tables with 50M users.

My favourite for local-first apps: WAL mode, migrations and single-file simplicity.

Cache, queues, rate limiting and pub/sub — the speed layer of high-load systems.

Relational database management from classic LAMP to dockerized production systems.

Multi-stage builds, compose stacks and production deploys — every project of mine ships with a container.

Servers from scratch: nginx/Caddy, SSL, firewalls, systemd, monitoring and backup strategies.

Container orchestration: deployments, autoscaling, rolling updates and production cluster management.

Modern reverse proxy with automatic HTTPS: zero-config SSL, load balancing and live use on production servers.