Muhammadamin Xosilov

Monitoring and analytics for self-service car washes in Uzbekistan. Each business sees its own bays, programs, tariffs, payments and reports; wash controllers report over MQTT.

• Tenant isolation enforced in the database with PostgreSQL row-level security and same-tenant foreign keys.
• ESP32 controllers publish over MQTT; events are validated and idempotent, and failed processing rolls back.
• Collected money and button usage are tracked separately, so revenue is never double counted.
• Uzbek, Russian and English interface; role restrictions, login rate limiting and an audit trail.

Stack Python · FastAPI · SQLAlchemy · PostgreSQL · MQTT · Redis · Vue 3 · TypeScript

Private business app: accounts are issued by the operator, so visitors see the sign-in page.

An interactive course, DevSecOps: Zero to Hero: 46 modules in six phases, from how computers and Linux work to securing pipelines, with progress that follows you.

• Quizzes graded on the server and lab checks that verify real work, not just a click.
• Visual simulators for CIDR, DNS, TCP and firewalls embedded in the lessons.
• Production stack: nginx with a strict CSP, two API replicas, PostgreSQL and daily backups.

Stack Vue 3 · TypeScript · FastAPI · PostgreSQL · nginx · Docker

The course outline is public; a free account saves progress.

A learning platform that takes Python developers from foundations to PostgreSQL, FastAPI services, workers, message brokers, RAG and AI evaluation, and measures skill by evidence rather than pages read.

• 195 lessons across 23 tracks, each with prediction and debugging checkpoints.
• 390 scenario exercises graded on the server, plus spaced review driven by your mistakes.
• Python and SQL labs with isolated tests; beginner, intermediate and advanced evaluations.
• Skill scores, weak areas and a personal study plan built from saved evidence.

Stack Next.js · React · TypeScript · FastAPI · PostgreSQL · Docker

Create a free account to start; your study history stays private.